Related Environmental Issues Research Articles

Covid-19 and its related environmental quality issues along ganga river, Varanasi, India

COVID-19 made people around the world in terrifying and appalling circumstance which held back all collaborative stitches that is the government decreed people to stay in homes for suppressing the disease spread amid people. Pandemic situation due to Covid-19 has lead to worldwide lockdown. On the other hand, it has increased the quality of the environment especially in hydrosphere and atmosphere progressively throughout the world. The global shutdown from March to June 2020 made liable in assessing the environmental condition which is eccentric accomplishment when collating with past two decades. This study demonstrates change in the water and aerosol quality with the aid of remote sensing in Ganga River of Varanasi city, Uttar Pradesh state of India. Sentinel data obtained from February to July of 2020 used to determine the variation of pollution levels during different phases of lockdown. NO2 levels derived from Sentinel data shows hazardous level of 5.64x10-5mol m-2 in March which is progressively decreased to 5.29 x10-5mol m-2 for the month of April. NO2 level further gradually increased after the unlock 1.0. Similarly, CO levels obtained from Sentinel data shows hazardous level of 0.0517mol m-2 in February which is progressively decreased to 0.0490 mol m-2 for the lockdown periods and it was gradually increased after the unlock phase. Further, Landsat data has been used to show Suspended Particulate Matter and pollution variation between lockdown phases. The high concentration of SPM value for March month ranges from -48.7773 to -48.7812 ,there is drastic decrease in concentration of SPM in which reflection value ranges from -48.7772 to -48.7806 in month of April noticed in the study area.Again there is drastic increase in July values ranging from -48.7753 to -48.7796 which is very high when compared to the lockdown SPM levels.The present study brought to light significant variations in the pollution level during the lockdown phases.

An overview on building-integrated photovoltaics: technological solutions, modeling, and control

The advancement of renewable and sustainable energy generation technologies has been driven by environment-related issues, energy independence, and high costs of fossil fuels. Building-integrated photovoltaic systems have been demonstrated to be a viable technology for the generation of renewable power, with the potential to assist buildings in meeting their energy demands. This work reviews the current status of novel PV technologies, including bifacial solar cells and semi-transparent solar cells. This review discusses the various constructions of PV technologies, recent advances in these products, the influence of key design factors on electrical and thermal performance, and their potential in the design of energy-efficient smart buildings. The attention is focused on bifacial and semi-transparent PV systems, given the high level of interest of the scientific community in their current and potential applications.Focus is also devoted to the analysis of the electrical, optical, and thermal modeling procedures developed for sizing, designing, and integrating photovoltaics into larger building simulations. The development of these models has a positive impact on the implementation of next-generation smart buildings. The latest innovative developments and key issues in the application of bifacial PV solutions in buildings are also summarized and analyzed. Special attention is paid to rear side electrical performance, which can be evaluated by means of illuminance/optical backside modeling. Finally, energy management and control of PV-equipped buildings via both model-based and data-driven approaches are discussed, as well as the integration of electric storage systems in a multi-building context.

Evaluation of selected crops for rearing predatory mite (Phytoseiulus persimilis), a predator of two-spotted red spider mites

The damage caused by two-spotted spider mites, and the risks associated with chemical pesticides, including health and environmental risks necessitate the exploration of sustainable pest management methods. Predatory mites, such as Phytoseiulus persimilis, are effective biocontrol agents against pests like the two-spotted spider mite (Tetranychus urticae). Thus, this study aimed to evaluate the suitability of different crops for rearing predatory mites (Phytoseiulus persimilis) and assess their effectiveness in controlling two-spotted spider mites (Tetranychus urticae). Linear regression analysis showed significant effects of selected crops on mite populations across all collection times (Collection 1: F (3, 8) = 22.46, p = 0.0003; Collection 2: F (3, 8) = 11.45, p = 0.0029; and Collection 3: F (3, 8) = 9.17, p = 0.0057). ANOVA showed significant differences in mite counts among the crops (F (3, 32) = 18.06, p < 0.001), corroborated by bootstrapping analysis. Beans demonstrated the highest potential for supporting predatory mite populations, followed by eggplant and black nightshade, illustrating that crop diversification can enhance predatory mite production while suggesting adoption of Integrated pest management (IPM) strategies to reduce pesticide costs and environmental impacts. There is the need for collaborative research and policy support to drive innovation and promote sustainable pest management practices in agriculture, thus addressing pesticide-use related environmental issues.

Appraisal of awareness about single use plastic bags (supbs) among consumers and shopkeepers of Lanka market, Varanasi, Uttar Pradesh, India

Abstract The awareness level of humans varies depending upon various known and unknown factors. Environmental awareness of an individual is the reflection of his/her thoughts, feelings and sensitivities towards the environment and its associated problems like degradation. It is the most important parameter for the measurement of implementation of government’s policies designed for the safeguard of environment and other related issues. The Indian Government decision for the complete ban on the Single-Use Plastic Bags (SUPBs) has been implemented in the whole country since 01 July 2022. Single-use plastic bags pose serious concerns for the environment and the economy of the country. The consumption as well as the disposal of plastic-related products is increasing day by day in India. Around 3.5 million tonnes of plastic waste are generated every year (CPCB 2020). The present paper is about the appraisal of the awareness level of consumers and shopkeepers about the use of plastic bags. In the present study, the primary survey is conducted to understand the awareness of consumers and shopkeepers regarding Single-Use Plastic Bags (SUPBs) in Lanka market, Varanasi, Uttar Pradesh. The study tries to relate the level of literacy, economic status, hesitation to carry own bags and demand for the plastic bags with the environment awareness level. Study reflects, there is a strong relationship between uses of plastic bags with economic, social, cultural, political status of the people. It also reflects the lack of enforcement of policies about the Single-Use Plastic Bags (SUPBs).

Lead-free methyl ammonium tin iodide perovskite thin film growth in single step via plasma enhanced chemical vapour deposition technique and its optoelectronic properties

In the present work, lead free methyl ammonium tin iodide (CH3NH3SnI3 or MASnI3) perovskite thin films have been deposited via single step plasma enhanced chemical vapour deposition (PECVD) technique. In our earlier work, we reported lead based methyl ammonium lead iodide (CH3NH3PbI3 or MAPbI3) perovskite thin film deposition in 2-step, using sputtering technique for the PbI2 thin films and PECVD technique for CH3NH3I (MAI) thin films. Similarly, CH3NH3SnI3 perovskite thin films are deposited in this work using PECVD technique in single step. Lead is substituted with tin due to its toxic behaviour, environmental and health related issues. CH3NH3SnI3 perovskite is doped n-type via changing the molar ratio of SnI2 and CH3NH3I. SnI2/CH3NH3I ratio is changed from 0.33 to 2 to study the n-type doping of CH3NH3SnI3 perovskite. Deposited CH3NH3SnI3 perovskite thin films are deposited over p-type silicon wafer to make n-type doped n-CH3NH3SnI3/p-Si heterojunction photodiode.

In situ nitrogen-doped graphene-TiO2 nano-hybrid as an efficient photocatalyst for pollutant degradation.

To solve environmental-related issues (wastewater remediation, energy conservation and air purification) caused by rapid urbanization and industrialization, synthesis of novel and modified nanostructured photocatalyst has received increasing attention in recent years. We herein report the facile synthesis of in situ nitrogen-doped chemically anchored TiO2 with graphene through sol-gel method. The structural analysis using X-ray diffraction showed that the crystalline nitrogen-doped graphene-titanium dioxide (N-GT) nanocomposite is mainly composed of anatase with minor brookite phase. Raman spectroscopy revealed the graphene characteristic band presence at low intensity level in addition to the main bands of anatase TiO2. X-ray photoelectron spectroscopy analysis disclosed the chemical bonding of TiO2 with graphene via Ti-O-C linkage, also the substitution of nitrogen dopant in both TiO2 lattice and into the skeleton of graphene nanoflakes. UV-Vis absorption spectroscopy analysis established that the modified material can efficiently absorb the longer wavelength range photons due to its narrowed band gap. The N0.06-GT material showed the highest degradation efficiency over methylene blue (MB, ∼98%) under UV and sulfamethoxazole (SMX, ∼ 90.0%) under visible light irradiation. The increased activity of the composite is credited to the synergistic effect of high surface area via greater adsorption capacity, narrowed band gap via increased photon absorption, and reduced e-/h+ recombination via good electron acceptability of graphene nanoflakes and defect sites (Ti3+ and oxygen vacancy(Vo)). The ROS experiments further depict that primarily hydroxyl radicals (OH•) and superoxide anions (O2•-) are responsible for the pollutant degradation in the process redox reactions. In summary, our findings specify new insight into the fabrication of this new material whose efficiency can be further tested in applications like H2 production, CO2 conversion to value-added products, and in energy conservation and storage.

The Role of Universities in Awareness Creation Towards Plastic Pollution Mitigation in Nigeria

The continent of Africa just like other continents is experiencing the negative impact of plastic pollution as well as other environmental pollution related issues. Plastic pollution is therefore an issue of great concern to communities, cities and campuses across Nigeria. Federal and State Ministries of Environment and other environmental related NGOs in collaboration with Universities in Nigeria need to join hands in fighting this menace. This study vividly identifies the role of universities in awareness creation towards plastic pollution mitigation in Nigeria.

Evaluating Machine-Learning Algorithms for Mapping LULC of the uMngeni Catchment Area, KwaZulu-Natal

Analysis of land use/land cover (LULC) in catchment areas is the first action toward safeguarding freshwater resources. LULC information in the watershed has gained popularity in the natural science field as it helps water resource managers and environmental health specialists develop natural resource conservation strategies based on available quantitative information. Thus, remote sensing is the cornerstone in addressing environmental-related issues at the catchment level. In this study, the performance of four machine learning algorithms (MLAs), namely Random Forests (RFs), Support Vector Machines (SVMs), Artificial Neural Networks (ANNs), and Naïve Bayes (NB), were investigated to classify the catchment into nine relevant classes of the undulating watershed landscape using Landsat 8 Operational Land Imager (L8-OLI) imagery. The assessment of the MLAs was based on a visual inspection of the analyst and commonly used assessment metrics, such as user’s accuracy (UA), producers’ accuracy (PA), overall accuracy (OA), and the kappa coefficient. The MLAs produced good results, where RF (OA = 97.02%, Kappa = 0.96), SVM (OA = 89.74%, Kappa = 0.88), ANN (OA = 87%, Kappa = 0.86), and NB (OA = 68.64%, Kappa = 0.58). The results show the outstanding performance of the RF model over SVM and ANN with a significant margin. While NB yielded satisfactory results, its sensitivity to limited training samples could primarily influence these results. In contrast, the robust performance of RF could be due to an ability to classify high-dimensional data with limited training data.

Pyridinic-N induced reversible adsorption of high-boiling-point organic gases on functionalized mesoporous carbon

Adsorptive capture of high-boiling-point organic gases (HBPOs) from hot flue gases is a key process in industry to tackle related environmental health or equipment clogging issues. However, few porous sorbents simultaneously achieve satisfactory adsorption capacity and regenerability due to strong affinity for HBPOs, compromising the economic viability and hindering the large-scale use of conventional disposable sorbents. In this work, we attempt to address this challenge by developing a functionalized mesoporous carbon (FMC) via the solution combustion synthesis method. Breakthrough experiments on phenanthrene and pyrene as representative HBPOs show that the FMC with lotus-shaped carbon sheet network, abundant 4–8 nm-concentrated mesoporosity, and oxygen/nitrogen-doped surface obtains unprecedented great capacity (1–2 orders of magnitude higher than reported values) and regenerability (peak desorption temperatures lower than respective boiling points). In situ characterizations and DFT simulations demonstrate the interfered π–π complexation as a highly reversible interaction between the carbonyl/pyridinic N-paired site and the polyaromatic adsorbate. The recyclability of FMC was demonstrated by negligible capacity reduction after 10 sorption cycles. This work showcases the potential for improving the economic feasibility of HBPOs capture by reducing the energy penalty and extending the sorbent lifetime.

Influences of pretreatment methods on the mechanical and environmental behaviors of PG-GGBS-LM ternary stabilizer.

Phosphogypsum is a kind of acidic industrial byproducts with high content of soluble phosphorus and fluorine pollutants, which requires to be pretreated when used as cementitious material to (partial) replace traditional Portland cement. In this study, five different pretreatment methods were proposed for comparative analysis to examine the pretreatment effect on the mechanical and environmental behaviors of ternary phosphogypsum (PG), ground granulated blast-furnace slag (GGBS), and lime (LM) mixed stabilizer. Series laboratory tests, including unconfined compressive strength (UCS), pH, phosphorus (P)/fluorine (F) leaching, scanning electron microscopy (SEM), and X-ray diffraction (XRD) tests, were conducted to comprehend the macro- and microscopic mechanism. The results show that it is essential to grind raw PG to finer powdered state, so that it reacts more easily and quickly with LM and water. In addition, it was noticed that the UCS and P/F leaching concentration are not only affected by the mixing proportion of the PG-GGBS-LM ternary stabilizer, but also by the curing duration. The UCS increases rapidly from initial curing period and then grows slowly after 28days of curing. From the perspective of strength evolution, mixing proportion of PG: GGBS: LM = 15:80:5 is optimal, but considering the economy and environmental related issues, PG: GGBS: LM = 30:65:5 was regarded as a more attractive choice. The findings can provide a reference for the selection of pretreatment methods and design of PG-based cementitious materials suited for stabilized soils.

Organic Electrode Materials for Energy Storage and Conversion: Mechanism, Characteristics, and Applications.

ConspectusLithium ion batteries (LIBs) with inorganic intercalation compounds as electrode active materials have become an indispensable part of human life. However, the rapid increase in their annual production raises concerns about limited mineral reserves and related environmental issues. Therefore, organic electrode materials (OEMs) for rechargeable batteries have once again come into the focus of researchers because of their design flexibility, sustainability, and environmental compatibility. Compared with conventional inorganic cathode materials for Li ion batteries, OEMs possess some unique characteristics including flexible molecular structure, weak intermolecular interaction, being highly soluble in electrolytes, and moderate electrochemical potentials. These unique characteristics make OEMs suitable for applications in multivalent ion batteries, low-temperature batteries, redox flow batteries, and decoupled water electrolysis. Specifically, the flexible molecular structure and weak intermolecular interaction of OEMs make multivalent ions easily accessible to the redox sites of OEMs and facilitate the desolvation process on the redox site, thus improving the low-temperature performance, while the highly soluble nature enables OEMs as redox couples for aqueous redox flow batteries. Finally, the moderate electrochemical potential and reversible proton storage and release of OEMs make them suitable as redox mediators for water electrolysis. Over the past ten years, although various new OEMs have been developed for Li-organic batteries, Na-organic batteries, Zn-organic batteries, and other battery systems, batteries with OEMs still face many challenges, such as poor cycle stability, inferior energy density, and limited rate capability. Therefore, previous reviews of OEMs mainly focused on organic molecular design for organic batteries or strategies to improve the electrochemical performance of OEMs. A comprehensive review to explore the characteristics of OEMs and establish the correlation between these characteristics and their specific application in energy storage and conversion is still lacking.In this Account, we initially provide an overview of the sustainability and environmental friendliness of OEMs for energy storage and conversion. Subsequently, we summarize the charge storage mechanisms of the different types of OEMs. Thereafter, we explore the characteristics of OEMs in comparison with conventional inorganic intercalation compounds including their structural flexibility, high solubility in the electrolyte, and appropriate electrochemical potential in order to establish the correlations between their characteristics and potential applications. Unlike previous reviews that mainly introduce the electrochemical performance progress of different organic batteries, this Account specifically focuses on some exceptional applications of OEMs corresponding to the characteristics of organic electrode materials in energy storage and conversion, as previously published by our groups. These applications include monovalent ion batteries, multivalent ion batteries, low-temperature batteries, redox flow batteries with soluble OEMs, and decoupled water electrolysis employing organic electrodes as redox mediators. We hope that this Account will make an invaluable contribution to the development of organic electrode materials for next-generation batteries and help to unlock a world of potential energy storage applications.

The Role of Communication Media in Socio-Environmental Conflicts

In recent decades, certain environment-related issues have come into the public eye. This article aims to analyse socio-environmental conflicts from both a democratic and a communication policy perspective. Given that these socio-environmental conflicts are the response to public policies, this article seeks to study the role played by the media in shaping them. The study focuses on the Basque Country, where many socio-environmental conflicts arise due to the implementation of public environmental policies. The methodology includes quantitative analysis using the data obtained from conducting a press analysis, and a qualitative approach using information obtained from in-depth interviews and the analysis of documentation. The results suggest a communicational and democratic deficit in the socio-environmental conflicts analysed, since the media do not help to build public opinion in a dialogical and dialectical way. To address this, we need a more diverse field of communication beneficial for environmental issues, so that we can work on information, considering the perspectives of all actors and the main topics of discussion. Environmental issues should go beyond traditional representative policies, inviting a broader range of actors in debates.

Environmental regulation and corporate financial risk: The role of credit guarantees

This research explores the relationship between environmental regulation and corporate financial risk in the face of increasing public environmental concerns worldwide. Taking advantage of public-listed firms in Shanghai and Shenzhen stock markets from 2010 to 2022, this study finds strong evidence that environmental regulations inversely affect corporate financial risk after controlling for various firm-specific variables. The findings are robust to a series of robustness tests. In addition, this study further demonstrates that credit guarantees positively moderate the relationship between environmental regulation and firms’ financial risk. Overall, our study contributes to the fast-growing literature on the impact of environmental-related issues on firm outcomes and generates profound policy implications.

Reduction of CO2 emissions through the co-combustion of lignite with biomass residues: Renewable and non-renewable CO2 per produced megajoule and fuel characterization

Accumulation of unmanaged agricultural wastes is related to increased environmental concern, as they usually are left unexploited and/or burned uncontrolled in the fields. The reduction/utilization of these wastes by turning them into solid biofuels for energy production is a viable solution for addressing the related environmental issues. In this study, twelve alternative solid biofuels of biomass residues and lignite (sunflower husk - BSH, stem, disk florets and seeds biodiesel sunflower wastes -BSW, corn husk -HKC, corn stalk and husk -SHC) were mixed with lignite in several proportions and assessed by using energy content analysis, proximate analysis, and ultimate analysis. Empirical chemical formulas were also determined. Furthermore, it introduces a novel concept to separate and quantify the renewable CO2 emissions, from the non-renewable emissions resulting from biomass co-combustion with lignite (alternative solid composite biofuels). The renewable and non-renewable CO2 emissions were expressed per produced megajoule (MJ) and per kilogram (Kg). The non-renewable CO2 emissions per produced MJ of the blends were compared to lignite emissions. The results showed that blends with 70 wt%, 50 wt% and 30 wt% biomass in blend could reduce about 75 %, 57 % and 34 % the non-renewable CO2 emissions per produced MJ, respectively. The present work suggests that blends of agricultural residues with lignite not only could be used as alternative solid biofuels (with better combustion characteristics than lignite sample, e.g. better energy content, less ash content, less Sulphur content, and similar Nitrogen content), but also could help to reduce carbon emissions via the co-combustion process.

How does an economic shock affect environmental attitudes, preferences and issue importance? Evidence from Switzerland

How do economic shocks affect pressure by the mass public for pro-environmental political action? If democratic systems are to develop and sustain ambitious environmental policy over several decades, this question is important to answer. Theoretically, we argue to look beyond changes in attitudes such as environmental concern, and trace whether and how citizen's policy preferences, and the political importance they attach to environment-related issues change when experiencing a deterioration of their personal economic situation. Empirically, we draw on high-quality population-representative panel survey data for an affluent country, Switzerland, combining tailored survey measures for quasi-random Corona-related employment and income losses, nuanced measures of environmental attitudes and policy preferences, and recently developed measures for issue importance. We neither find a decline of environmental policy support among economically affected individuals compared to the rest of the population (a population wide drop, however), nor lower importance given to environment related relative to economic issues in voting decisions. While this suggests that politicians need not fear electoral losses when pursuing environmental policies in times of economic crisis, we note that the severe extent of the Covid-induced recession, coupled with a rapid recovery, is peculiar to this economic crisis and warrants further research regarding the generalizability of our findings to economic shocks of longer duration.

Assessment of Ecological Flow in Hulan River Basin Utilizing SWAT Model and Diverse Hydrological Approaches

Human activities have significantly altered the hydrological processes of rivers. In recent years, the increased focus on global water resource exploitation and land use changes has heightened the significance of related ecological and environmental issues. To investigate the land use changes in Hulan River Basin between 1980 and 2020, and the corresponding flow under various ecological standards, a quantitative assessment of land use changes in Hulan River Basin was conducted by analyzing the Land Use Dynamic Degree (LUD) index and the land use change matrix. Two types of models, namely natural runoff models and status quo runoff models, were developed to evaluate alterations in basin runoff. Various hydrological techniques were utilized to calculate the ecological water deficit in Hulan River Basin. The results suggest the following: (1) human consumption comprises approximately 40% of surface water resources, with Hulan River Basin exhibiting a moderate consumption level; (2) when determining the minimum ecological flow, the Distribution Flow Method (DFM) method yielded slightly higher outcomes compared to alternative methodologies; both the variable Q90 method and DFM (Q2) method satisfy 10% of the natural river flow, however, in terms of capturing the hydrological pattern, DFM exhibits a slightly lower fitting degree compared to the variable Q90 (monthly average flow with 90% guarantee rate) method; (3) DFM is identified as scientifically reasonable for determining the most suitable ecological flow in comparison to other hydrological methods; (4) despite the widespread water scarcity in Hulan River Basin, the variance between most periods and the ideal ecological flow remains minimal, indicating that severe water shortages are uncommon.

Zinc and silicon fertilizers in conventional and nano‐forms: Mitigating salinity effects in maize (Zea mays L.)

AbstractBackgroundSalinity stress, an escalating concern in the realm of agriculture, significantly hampers crop productivity worldwide. In recent years, nano‐fertilizers have been identified as an innovative and promising avenue for improving nutrient use efficiency and mitigating salt stress in plants.AimsThis study delves into the comparative efficacy of nano‐fertilizers (Zn and Si) and their conventional sources in bolstering maize's resilience against salt stress.MethodsThe hydroponic experiment was conducted to test maize plants under salt stress along with Zn and Si nanoparticles (NPs) application. The analysis extends to their impacts on ionic homeostasis, specifically focusing on potassium and sodium concentrations, K/Na ratio, stomatal conductance, chlorophyll content, and the osmotic potential (OP) within the shoots and roots of maize.ResultsNanoparticles relatively helped plants better under stress, compared to their respective bulk mode of applications. Nano‐Zn treatment considerably boosts the K+ concentration and enhanced K/Na ratio, as a key physiological trait in salt‐resistant species, while nano‐Si demonstrates a prominent role in modulating OP and limiting Na+ accumulation along with higher Zn and Si accumulation in plants. The salt tolerance index confirmed the contribution of these ionic and osmotic adjustments in helping maize plant against salt stress.ConclusionsOur findings confirm that the application of nutrients as nano‐fertilizers, particularly nano‐Zn, enhanced K/Na ratio and improved nutrient availability and uptake of the plant. Si nanoparticles are also attributed to better osmotic adjustment and facilitating water movement, thus highlighting the potential of nano‐fertilizers in improving overall agricultural productivity and related environmental issues.

Identification of toxic metal contamination in surface sediments of the Xiaoqing River under a long-term perspective (1996–2020): Risks, sources and driving factors

The contamination of sediments by toxic metals poses a significant threat to both river ecosystems and human health. In this study, the geo-accumulation index (Igeo), biotoxicity evaluation method, and potential ecological risk index (RI) were employed to analyze the contamination level, biotoxicity risk, and potential ecological risk of toxic metals in surface sediments of the Xiaoqing River. To identify toxic metal sources, Spearman correlation and principal component analysis with multiple linear regression analysis (PCA−MLR) were employed. Additionally, redundancy analysis (RDA) was utilized to investigate potential driving factors affecting toxic metal accumulation in sediments. The results revealed that the levels of the five investigated metals (Cr, Pb, As, Hg, and Cd) showed constant fluctuations during the period 1996–2020. The midstream was found to be more polluted than the upstream and downstream. In the research area, Hg was identified as the primary contaminant with high levels of contamination, posing a biotoxicity risk and potential ecological risk. Pollution sources were identified for two periods: A (1996–2010) and B (2011–2020), with industrial, agricultural, traffic, and natural sources being the main contributors. During period A, industrial sources accounted for the highest proportion (40.8%), followed by agricultural sources (36.6%), and geological natural sources (22.6%). During period B, agricultural sources accounted for the highest proportion (42%), followed by industrial and traffic sources (32.4%), and geological natural sources (25.6%). The distribution of toxic metals in the basin was significantly influenced by water pH, sediment organic matter, population density, and per capita GDP. The study results provide fundamental data for preventing pollution and managing water resources contaminated with toxic metals in the sediments of the Xiaoqing River in Jinan. Additionally, it serves as a reference for analyzing related ecological and environmental issues in the basin.

Recent Developments of Nano Flame Retardants for Unsaturated Polyester Resin.

For many years, efforts have been made to reduce the flammability of unsaturated polyester resins (UPRs), which are often used in the rail, shipbuilding, and construction industries. Without modification, they often fail to meet fire safety standards. Despite a rich history of flame retardants (FRs) applied to UPRs, researchers seek new solutions that will provide lower flammability and smoke density, as well as attaining a lower environmental impact from the composites. The objective of the study is to highlight the most important recent research on promising nano FRs in order to promote their further development. Mechanisms of action of several groups of nano FRs, such as clay-based, carbon-based, transition metal compounds, layered double hydroxides, polyhedral oligomeric silsesquioxanes, and others, including bio-based, have been studied. Particular emphasis has been laid on nano FRs applied to UPRs, and their influences on thermal stability, flammability, and mechanical properties. Moreover, the environmental impact and toxicity of nano FRs have been discussed. Results have proved that nano FRs applied at low loadings may significantly improve thermal stability, with a simultaneous increase or only a slight decrease in mechanical properties. However, attention on related environmental issues has highlighted the necessity of carefully selecting novel nano FRs.

Social welfare professionals’ views on addressing environmental issues in social work in Finland

ABSTRACT Global environmental challenges such as climate change, biodiversity loss, and overconsumption of natural resources require urgent action. Environmental crises have social consequences; hence, social work should participate in recognizing and mitigating these . This study investigated social welfare professionals’ perceptions on the relation of their work to environmental issues in Finland and the factors that influence these views. The research questions were: 1) How important do social welfare professionals perceive addressing environmental issues to be in their work? 2) What kinds of environmental issues do they perceive as having the most influence on social work clients’ wellbeing in Finland? 3) What background factors are associated with the perceived importance of addressing environmental issues in social work? A survey (N = 542) conducted among Finnish social welfare professionals in November 2020 showed that most respondents perceived addressing environmental issues in social work as important. Increasing concentrations of the population in certain areas, anxiety related to environmental problems, and desolated rural areas were the three most important environment-related issues marked as impairing client wellbeing. Social welfare professionals who emphasized the importance of addressing environmental issues in their personal life and those working in private or third sector organizations were more likely than public sector counterparts to value addressing environmental issues in social work. The findings suggest that social welfare professionals recognize that environment-related issues affect client wellbeing; hence, these issues should be incorporated into social work training and practice.