Sustainable Method Research Articles

Mitigation of microfibers in laundry effluent: Investigation of luffa fibers as an eco-friendly filtration system.

Domestic laundry wastewater is a major contributor to microfiber emissions in the aquatic environment. Among several mitigation measures, the use of external filters to capture microfibers from wastewater is one of the most efficient and commercially viable methods. This study attempted to develop an eco-friendly filtration medium to filter microfibers in laundry wastewater using luffa cylindrica fibers. Sourced luffa fibers were made into tight rolls and stacked in a filtration column to filter the effluent. The analysis showed that the alkali-treated luffa fiber rolls were more effective in filtering the microfibers than untreated luffa fibers. Hence, the alkali treatment process was optimized for better performance; an alkali concentration of 5.8%, treatment time of 5h, and 37°C temperature provide better performance. The characterization of alkali-treated luffa fibers showed significant changes in the morphology and removal of lignin and hemicellulose components, enhancing the physical adsorption of microfibers on the surface. The experimental filtration results showed that the developed filter can effectively remove up to 93% of microfibers from laundry effluent, and the efficiency remained superior for up to 15 filtrations. Furthermore, an increase in filtration leads to the accumulation of detergents in the luffa net-like vascular structure and reduced effectiveness. The use of the developed product in a real-time washing machine outlet was found to be effective with an efficiency of 98%. The developed product is a versatile and cost-effective solution, suitable for use in domestic washing machines. Its simplicity and ease of integration make it an effective and eco-friendly alternative for filtering microfibers from laundry effluent. The future direction of the study also suggests a sustainable disposal method for luffa fibers using it as a matrix material in red soil-based thermal or sound insulation panels and restricting the reach of microfibers into the environment.

Selective sensing of terbinafine hydrochloride using carbon-based electrodes: a green and sustainable electroanalytical method for pharmaceutical products.

Terbinafine hydrochloride (TBF) is a broad-spectrum antifungal used to treat various dermatophyte infections affecting the skin, hair, and nails. Accurate, sensitive, and affordable analytical methods are crucial for quantifying this drug. In this study, we report on the use of carbon-based electrodes for the electrochemical determination of TBF in pharmaceutical samples, including raw materials and tablets. Notably, for the first time in the literature, we employ screen-printed carbon electrodes (SPCE) for TBF quantification. Additionally, glassy carbon electrodes (GCE) were used to explore the redox behavior of the analyte. Electrochemical performance was evaluated and compared using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Optimized conditions of supporting electrolyte and scan rate studies revealed that the oxidation of TBF involves an equal exchange of protons and electrons. For the GCE, the oxidation process was found to be irreversible, controlled by both diffusion and adsorption, while for the SPCE, it was irreversible and diffusion-controlled. Square wave voltammetry (SWV) was optimized for both electrodes to enhance sensitivity. For SPCE, the calibration curve ranged from 5 to 100 μg mL-1, with an LOD of 1.48 μg mL-1 using a single drop of sample. The calibration curve for GCE was constructed between 2.5 and 30 μg mL-1, with a limit of detection (LOD) of 0.072 μg mL-1. TBF quantification was performed on raw material samples from various suppliers and tablet forms using external calibration with a recovery range within 90-110%. Analysis of the data reveals that the voltammetric method's accuracy aligns well with the chromatographic approach based on high performance liquid chromatography (HPLC). Furthermore, the proposed methodology demonstrated outstanding sustainability, achieving a score of 0.91 in Green Analytical Chemistry (GAC) criteria. Our novel approach combines high analytical efficiency with a reduced environmental impact, establishing itself as a green, cost-effective, and accurate alternative for TBF sensing.

Dual-mode natural silk nanofiber aerogel with porous layered structure for highly stabilized radiative cooling and heating.

Passive Radiant Cooling and Heating are green and sustainable methods of radiant heat management without consuming additional energy. However, the absorption of sunlight and poor insulation of materials can reduce radiative cooling and also affect radiative heating performance. Herein, we have constructed porous hierarchical dual-mode silk nanofibrous aerogel (SNF) films with high mechanical toughness and stability using silk nanofibers/GO. The porous hierarchical structure endows the cooling side of the dual-mode film with low thermal conductivity (0.034 W·m-1·K-1) and high atmospheric window emissivity (92.7 %), with a sub-ambient cooling temperature of up to 9.6 °C under direct sunlight. The heating side of the dual-mode film has a high solar absorptivity (93.8 %) and a low atmospheric window emissivity (11.4 %). The covered air temperature was warmed by 25.5 °C in the simulated cold environment by the ice water bath. Importantly, both sides of the film are hydrophobically modified with FOTS to exhibit self-cleaning properties that protect the surface from contamination and facilitate long-term radiative cooling/heating. The films showed excellent cooling and heating properties even after two months of immersion in different pH solutions. This dual-mode aerogel film has great potential for outdoor applications and can be adapted to radiant heat management in various complex environments.

Seasonal dynamics and functional diversity of soil nematode communities under treated wastewater irrigation in abandoned agricultural soils.

The use of treated wastewater (TWW) for agricultural irrigation is becoming more popular as a sustainable alternative to freshwater due to increasing water scarcity. While considerable research exists on the effects of TWW on soil microorganisms, its impact on soil nematodes, key indicators of soil health remains unexplored. This study assessed the effects of two years of TWW irrigation on soil nematode communities in abandoned fields cultivated with Lavender, Anise, Olive and Pomegranate trees. Seasonal soil samples were analyzed for nematode abundance, community composition and ecological indices. TWW irrigation modified soil nematode community structure, favoring the dominance of bacterivores (Acrobeloides) while suppressing plant-parasitic nematodes (Pratylenchus, Bitylenchus). Nematode-based indices showed no significant differences between TWW- and freshwater-irrigated soils, indicating stable and resilient communities. Seasonal precipitation levels strongly influenced nematode abundances, highlighting environmental resilience. Plant species did not create ecological niches, probably due to the strong influence of precipitation and soil properties; nevertheless, plant establishment increased nematode diversity over time, with omnivores and predators emerging alongside bacterivores and fungivores, reflecting recovery dynamics. Even though TWW irrigation is considered a type of disturbance, it facilitated soil nematode diversity and maintained ecological stability. Properly treated wastewater serves as a sustainable irrigation method that enhances soil health and biodiversity, rendering it a viable alternative for agricultural systems in degraded and water-scarce areas under changing climatic conditions.

Mitigating negative impacts of drought on oak seedlings performances through plant growth-promoting rhizobacteria.

Drought stress during the plant's growing season is a serious constraint to plant establishment in arid and semiarid Mediterranean ecosystems. Plant growth promoting rhizobacteria (PGPR) as environmentally friendly and innovative management approach can be used to produce seedlings better adapted to these environments. We tested native PGPR strains isolated from drought-tolerant tree and shrub species originating from two climatically contrasting regions: hot-dry (Dehloran) and milder Mediterranean climate (Ilam). These strains were used as a biological input to improve the morphological and physiological traits of Brant's oak (Quercus brantii Lindl.) seedlings in a greenhouse experiment. Seedlings were inoculated with various drought-tolerant strains or a combination of all bacteria (Bmix) and their morpho-physiological traits were measured under three levels of water stress (80% field capacity, FC80: no stress; 60% FC, FC60: moderate water stress and 40% FC, FC40: severe water stress). Strains from Dehloran were the most performant (Bacillus anthracis, B. licheniformis, B. cereus) except Stenotrophomonas maltophilia which originated from Ilam. They demonstrated the ability to solubilize insoluble phosphates (except for the B. licheniformis). They were also all able to produce auxin and the ACC-deaminase enzyme (except S. maltophilia). PGPR application, water stress treatments, and their interaction significantly influenced all the morphological and physiological seedling traits. Most traits significantly (p<0.01) decreased under FC40, in particular average leaf area, shoot fresh weight, and shoot dry weight. This decrease was particularly marked for the control (no inoculation), as the leaf area was reduced by 60% in FC40. In FC40, all bacterial treatments, especially B. cereus and Bmix efficiently improved seedling morphological traits and seedling quality index. The highest amount of chlorophyll a in FC40 was recorded for Bmix and B. licheniformis isolates. Total phenolic content and malondialdehyde levels, as well as proline, showed an increase under water stress conditions, particularly at FC40, irrespective of inoculation conditions. The amounts of malondialdehyde without inoculation increased significantly under water stress and the content were 1.3 and 2 times higher in FC60 and FC40, respectively, compared to FC80 with no inoculation. Under water stress, seedling performances and quality were impacted and the production of substances associated with physiological defense mechanisms, increased. However, the application of PGPR was able to mitigate these effects (in particular for B. cereus and Bmix). We concluded that application of drought tolerant PGPRs can be a cost effective and ecologically sustainable method for producing oak seedlings better adapted to water-scarce environments.

Advancements in functional adsorbents for sustainable recovery of rare earth elements from wastewater: A comprehensive review of performance, mechanisms, and applications.

Rare earth elements (REEs) are crucial metallic resources that play an essential role in national economies and industrial production. The reclaimation of REEs from wastewater stands as a significant supplementary strategy to bolster the REEs supply. Adsorption techniques are widely recognized as environmentally friendly and sustainable methods for the separation of REEs from wastewater. Despite the growing interest in adsorption-based REEs separation, comprehensive reviews of both traditional and novel adsorbents toward REEs recovery remain limited. This review aims to provide a thorough analysis of various adsorbents for the recovery of REEs. The types of adsorbents examined include activated carbons, functionalized silica nanoparticles, and microbial synthetic adsorbents, with a detailed evaluation of their adsorption capacities, selectivity, and regeneration potential. This study focuses on the mechanisms of REEs adsorption, including electrostatic interactions, ion exchange, surface complexation, and surface precipitation, highlighting how surface modifications can enhance REEs recovery efficiency. Future efforts in designing high-performance adsorbents should prioritize the optimization of the density of functional groups to enhance both selectivity and adsorption capacity, while also maintaining a balance between overall capacity, cost, and reusability. The incorporation of covalently bonded functional groups onto mechanically robust adsorbents can significantly strengthen chemical interactions with REEs and improve the structural stability of the adsorbents during reuse. Additionally, the development of materials with high specific surface areas and well-defined porous structures is benifitial to facilitating mass transfer of REEs and maximizing adsorption efficiency. Ultimately, the advancement of the design of efficient, highly selective and recyclable adsorbents is critical for addressing the growing demand for REEs across diverse industrial applications.

Silicone Oil-Functionalized Hydrophobic Nano Silica: A Floating Sorbent for Organic Pollutant Removal in Aquatic Systems.

Meso/microporous nano silica modified with macromolecular polymers produces attractive hybrids that repel water and have a hydrophobic surface, making them highly effective for targeting and eliminating organic contaminants in aquatic environments. In this study, nano silica was functionalized with silicone oil, an oligomeric siloxane derivative, to produce a hydrophobic silica nano hybrid characterized by a non-wetting water contact angle of 139°. This hydrophobic hybrid nano silica showed a sustainable floating nature on water even in turbulent streams. Due to such robust hydrophobic properties, the hybrid was explored for the separation of three different kinds of contaminants, such as (i) organic dyes, (ii) antibiotics, and (iii) nicotine. The concept of a floating sorbent has been innovatively introduced in this study through the application of silicone oil-modified nano silica. The adsorption experiments were systematically planned, and the data related to the percentage adsorption of contaminants with respect to dosage, pH, and concentration are reported. The results indicated an adsorption efficiency of >99% for cationic dyes with moderate adsorption observed for nicotine and antibiotics. The study highlights the significant potential of silicone oil-modified silica as a hydrophobic floating sorbent for environmental remediation. Buoyancy and strong water-repellent properties facilitate easy recovery and reuse, offering a sustainable and efficient method for the removal of diverse organic pollutants from water systems.

Integrated omics analyses elucidate acetaminophen biodegradation by Enterobacter sp. APAP_BS8.

Acetaminophen (APAP) is an extensively consumed over-the-counter and prescribed medication and a constituent of many active pharmaceutical compounds as well as personal care products. Its wide-scale prevalence in the environment due to inefficient treatment technologies has classified APAP as a contaminant of emerging concern. Thus, it is imperative to explore efficient and sustainable methods for remediation of contaminated environments. Considering the need for potent microbial resources, the present study deals with the evaluation of Enterobacter sp. APAP_BS8, degrading ∼88% of APAP (300mgkg-1) in 16 days in microcosms, and accomplishes the mechanistic perspectives of degradation through in-depth insights into genomics, proteomics, and metabolomics. Whole genome analysis of the 4.9 Mbp genome sequence revealed deaminated glutathione amidase, glucosamine-6-phosphate deaminase, LLM class flavin-dependent oxidoreductase, and oxidoreductase genes can mediate the degradation. Increased expression of proteins corresponding to these genes was observed in proteome analysis. Molecular docking and simulations presented operative interaction and binding of the degradation pathway intermediates at the catalytic site of the identified enzymes. Analysis of the metabolome identified hydroxyquinol, 4-aminophenol, and 3-hydroxy-cis, cis-muconate as intermediates. The outcomes revealed that Enterobacter sp. APAP_BS8 exhibits potential enzymatic machinery for APAP degradation, thus providing scope for formulating sustainable bioremediation technologies.

Efficient removal of cationic malachite green using co-pyrolyzed corn straw biochar-montmorillonite composites.

New efficient and sustainable methods for the removal of malachite green (MG) from environmental media are needed. In this study, corn straw was co-pyrolyzed with montmorillonite under a variety of conditions (400, 500, 600, and 700°C and 10-40wt% montmorillonite), without any use of toxic chemicals, to produce a series of biochar-clay composites. Characteristics of the composites that make them promising contaminant sorbents include a uniform lamellar-particle micromorphology, enhanced mesoporous structure and surface area (53.0m2g-1), and abundant and diverse oxygen/carbon-containing functional groups (i.e., O-H, C-O, C=C, and C-H). The composite produced at 600°C and 10wt% montmorillonite had the highest observed MG removal from aqueous solution (6572.1mgg-1, 99.6% removal rate). Adsorption of MG by the sorbent was attributed to multiple sorption mechanisms, including physical interaction, cation exchange, and π-π bonding interactions, and was modulated by intra-particle diffusion. This work highlights the potential of corn straw biochar-montmorillonite composites as a favorable adsorbent for environment remediation and water treatment.

Using an Aqueous Suspension of Duddingtonia flagrans Chlamydospores and a Hexane Extract of Artemisia cina as Sustainable Methods to Reduce the Fecal Egg Count and Larvae of Haemonchus contortus in the Feces of Periparturient Ewes

Using an Aqueous Suspension of Duddingtonia flagrans Chlamydospores and a Hexane Extract of Artemisia cina as Sustainable Methods to Reduce the Fecal Egg Count and Larvae of Haemonchus contortus in the Feces of Periparturient Ewes

Sustainable Extraction Technology of Fruit and Vegetable Residues as Novel Food Ingredients.

Fruit and vegetable waste (FVW) is a global waste issue with environmental impacts. It contains valuable compounds such as polysaccharides, polyphenols, proteins, vitamins, pigments, and fatty acids, which can be extracted for food applications. This study aims to review sustainable extraction methods for FVW and its potential in the food industry. This paper provides an overview of the sources and sustainable methods of high value-added compounds extracted from FVW. Sustainable techniques, including supercritical fluid extraction and ultrasound-assisted extraction, are compared with traditional methods, for their efficiency in extracting high-value compounds from FVW while minimizing environmental impact. Sustainable extraction of FVW compounds is sustainable and beneficial for novel food ingredients. However, challenges in scalability and cost need to be addressed for wider adoption in the food sector. Sustainable extraction techniques effectively extract phytochemicals from FVW, preserving bioactivity and reducing environmental load. These methods show promise for sustainable food ingredient development.

Redefining the Tea Green Leafhopper: Empoasca onukii Matsuda (Hemiptera: Cicadellidae) as a Vital Asset in Premium Tea Production.

This review explores the evolving role of the tea green leafhopper, Empoasca onukii, in the tea industry, transitioning from a recognized pest to a significant enhancer of tea quality. Recent research highlights how its feeding behavior stimulates the production of desirable secondary metabolites, thereby improving the flavor profiles and market value of premium teas, particularly varieties like Taiwan's "Oriental Beauty". As consumer demand for unique and artisanal teas rises, the economic benefits associated with E. onukii are becoming increasingly evident, prompting farmers to adopt sustainable agricultural practices that often involve reduced pesticide use. Furthermore, the dynamic interplay between climatic factors, E. onukii population dynamics, and tea cultivation practices necessitates integrated pest management strategies that balance the beneficial and detrimental impacts of this leafhopper. Understanding these complexities not only fosters sustainable production methods but also opens niche markets, benefiting local economies and promoting both economic viability and environmental sustainability in the tea industry.

High-throughput and sustainable B vitamins analysis in nutritional supplements, vegetables, and fruits via 2D carbon microfiber fractionation system coupled with mass spectrometry.

B vitamins are essential for energy metabolism, nervous health, blood production, and the immune system. Their quantification in nutritional supplements and food is mandatory to manage a correct daily intake and dosage. In this study, a fast and sustainable method for the analysis of 8B vitamins (VB1, VB2, VB3, nicotinamide, VB5, VB6, VB9, VB12) in real samples using a 2D-carbon microfiber fractionation system combined with a triple quadrupole mass spectrometer (2DμCFs-QqQ-MS/MS) is presented. The method shortens the analysis time to 5min, showing high sensitivities (LODs: 1.7-13.7ngmL-1, LOQs: 5.5-45.7ngmL-1, obtained with standard solutions), good reproducibility (RSDs <15%), and strong linear correlations (R2>0.997). When applied for B vitamin determination in nutritional supplements, results matched product label values at a 95% confidence level, with batch reproducibility never exceeding 5%. Furthermore, coupling a 2D-carbon microfiber fraction system with a quadrupole time-of-flight high-resolution mass spectrometry (2DμCFs-QTOF-HRMS) it is possible to carry out quick monitoring of B vitamin contents together with impurity evaluation in real samples.

Photocatalytic upcycling of polylactic acid to alanine by sulfur vacancy-rich cadmium sulfide

Photocatalytic conversion has emerged as a promising strategy for harnessing renewable solar energy in the valorization of plastic waste. However, research on the photocatalytic transformation of plastics into valuable nitrogen-containing chemicals remains limited. In this study, we present a visible-light-driven pathway for the conversion of polylactic acid (PLA) into alanine under mild conditions. This process is catalyzed by defect-engineered CdS nanocrystals synthesized at room temperature. We observe a distinctive volcano-shaped relationship between sulfur vacancy content in CdS and the corresponding alanine production rate reaching up to 4.95 mmol/g catalyst/h at 70 oC. Ultraviolet-visible, photocurrent, electrochemical impedance, transient absorption, photoluminescence, and Fourier-transform infrared spectroscopy collectively highlight the crucial role of sulfur vacancies. The surface vacancies serve as adsorption sites for lactic acid; however, an excessive number of vacancies can hinder charge transfer efficiency. Sulfur vacancy-rich CdS exhibits high stability with maintained performance and morphology over several runs, effectively converts real-life PLA products and shows potential in the amination of other polyesters. This work not only highlights a facile approach for fabricating defect-engineered catalysts but also presents a sustainable method for upcycling plastic waste into valuable chemicals.

VsMATE1-Mediated Citrate Efflux Is Involved in Al Resistance in Common Vetch (Vicia sativa L.).

Planting aluminum-tolerant legume green manure is a cost-effective and sustainable method to increase soil fertility as well as decrease Al toxicity in acidic soils. By analyzing the relative root elongation of seven legume green manure species, common vetch (Vicia sativa L.) was identified as an Al-resistant species. Furthermore, cultivars 418 (cv. Sujian No.3) and 426 (cv. Lanjian No.3) were identified as Al-resistant and -sensitive cultivars, respectively, among 12 common vetch germplasms. The root growth of 418 was less inhibited by Al toxicity in both the germination stage and seedling stage than that of 426. Under Al toxicity, 418 accumulated less Al in both roots and shoots. Citrate is more abundant in the roots of common vetch compared to oxalate or malate. The internal citrate contents showed no significant difference between 418 and 426 under either control or Al treatment. However, the citrate efflux increased in response to Al in 418 but not in 426 and was higher in 418 under Al stress than in 426. Consistently, VsMATE1 expression increased faster and to a greater extent in 418 than 426 in response to Al stress. These results indicated that a VsMATE1-mediated citrate efflux might play an important role in Al resistance in common vetch. It is suggested that VsMATE1 is a valuable candidate gene for aluminum resistance breeding.

Influence of Spray Angle on Scratch Resistance of Cold-Sprayed SS316L Deposits.

In this study, we investigated the effect of spray angle on the microstructure, bonding quality, and scratch resistance of cold-sprayed SS316L coatings on SS304 substrates. The coatings were deposited at spray angles of 45°, 60°, 75°, and 90° using a high-pressure cold spray system. A comprehensive analysis of the relationship between the spray angle and coating properties was conducted, with a particular focus on fracture toughness and porosity. Scratch testing, combined with real-time acoustic emission monitoring, enabled the precise identification of failure mechanisms and the assessment of coating integrity. The results indicate that microhardness and porosity are significantly influenced by the spray angle. The highest microhardness was achieved at a 45° angle, while a 90° angle resulted in the lowest porosity and superior bonding due to superior normal impact velocity. Fracture toughness was found to correlate with microstructural cohesion and particle deformation. Optimizing the incidence angle improved the coating performance by balancing strain hardening and ductility, thereby reducing the risk of premature failure. These findings are particularly relevant for industrial applications, where wear resistance and high-quality bonding are critical, such as in aerospace, automotive, and marine sectors. By adjusting the spray angles, manufacturers can enhance the longevity and reliability of the coated components, thus reducing maintenance costs and improving performance. This research highlights the importance of process parameters in achieving durable, high-quality coatings and emphasizes scratch testing as an effective, sustainable, and semi-destructive evaluation method for coating integrity.

A sustainable and green method for controlling acidic corrosion on mild steel using leaves of Araucaria heterophylla

There are several studies that announce the inhibitory behavior of this sort of substance to strengthen the shield of metals, which is one of the positive benefits of green inhibitors. In the current investigation, Araucaria heterophylla studied as a green corrosion inhibitor to avert the mild steel during the acidic cleaning. The examination of this plant’s ability to control corrosion at different concentrations in the acidic solution used certain expert measures. The electrochemical results suggested that Araucaria heterophylla had a stronger inhibitory effect on mild steel protection from corrosion. After 12 h of immersion, 1000 ppm of A. heterophylla extract produced corrosion inhibition efficacy (about 83.94%). According to the polarization outcomes, the mild steel corrosion current density dramatically decreased with the addition of Araucaria heterophylla extract, going from 1.08 μA/cm2 for the sample without inhibitor to 0.17 μA/cm2 for the sample having 1000 ppm inhibitor and according to electrochemical study the inhibition efficiency was found around 83%. Flavonoids were found in the plant’s leaves according to the high-performance thin-layer chromatography profile. The FTIR picks analysis like N–H stretching secondary amine (3337.07 cm−1), CO–O–C–O stretching anhydride (1022.64 cm−1) defined that functional groups and heteroatom were present. By the help of a GC–MS, the suggested inhibitor’s components were identified. Scanning electron microscopy suggests that a thin layer or passive film form on the surface. Quantum chemical calculation also supports the experimental results.

Influence of the Cellulose Purification Method on the Properties of PVA Composites with Almond Shell Fibres.

Almond shells (ASs) are a potential source of cellulose that could be obtained through sustainable methods for their valorisation. Biocomposites (BCs) from polyvinyl alcohol (PVA) and cellulose are interesting materials for developing sustainable packaging materials. BC based on PVA and AS cellulose were obtained by melt blending and compression moulding, by using subcritical water extraction at 160 or 180 °C, and subsequent bleaching with sodium chlorite (C) or hydrogen peroxide (P) to purify cellulose. The influence of the purification method on the properties of BC was analysed. Fibres treated with C were better dispersed in composites than those bleached with P. Residual phenolic compounds in the fibres provide the composite with ABTS∙+ scavenging capacity in line with the residual lignin content of the fibres. Both the presence of phenols and dispersed fibres reduced the film transparency, mainly in the UV range. Fibres enhanced the oxygen barrier capacity of composites, and those treated with HP also improved the water vapour barrier capacity. Fibres treated with C better promoted the increase in the elastic modulus of the composites, due to their highest crystallinity and dispersibility, while favoured the PVA crystallisation. Therefore, the obtained AS cellulose fibres could be used to obtain thermoprocessed PVA biocomposites for food packaging applications.

Peran Alat Pembelajaran Edukatif dalam Peningkatan Akademik di SDN 3 Bluluk Lamongan

Academics include teaching and learning, knowledge, skills and achievements obtained in the field of education. Educational learning tools are a development of educational game tool products (APE). An educational learning tool that aims to improve students' ability to absorb the subjects given at school in order to obtain increased grades in the academic world. SDN III Bluluk Lamongan has the problem of improving the effective teaching process in order to improve the quality of teaching and learning and grades. academics at school. The implementation method used in community service activities this time has 5 stages, the first is the observation method, the second is the introduction method, the third is the learning method, the fourth is the assessment method and the fifth is the sustainability method. The result of the service is an educational learning tool in the form of a modified snakes and ladders game that can improve students' grades and enthusiasm for learning and the role of this educational learning is to help students absorb lessons using a game method that can be played individually or in groups, and can be applied in various subjects.

Sustainable Production of Activated Carbon from Waste Wood Using Goethite Iron Ore

The growing demand for eco-friendly activated carbon necessitates sustainable production methods. This study investigates the conversion of waste wood into activated carbon using goethite iron ore as an activating agent. A high-temperature rotary furnace was used to activate the carbon at 1373 K. The oxygen released from the iron oxide during the heat treatment reacted with the carbon in the wood, resulting in 49% of activated carbon with BET surface areas between 684 m2/g and 770 m2/g. The activated carbon and char showed type I isotherms with micropore areas between 600 m2/g and 668 m2/g, respectively. Additionally, 92% of the iron in the ore was reduced from ferric to ferrous. The findings demonstrate that goethite iron ore is an effective activating agent for producing wood-based activated carbon while also generating metallic iron as a byproduct. This alternative activation method enhances the sustainability and efficiency of activated carbon production.