Water Purification System Research Articles

Efficient generation of singlet oxygen on Fe2O3/MoO3 Z-type heterojunction for removal of ciprofloxacin from water via photo-electro-Fenton-like system

Singlet oxygen (1O2), a typical reactive oxygen species (ROS) with selective oxidation properties, holds great application prospects in water environment treatment. However, the 1O2 generation mechanism in photo-electro-Fenton-like (PEF-like) system for water purification is still unclear. In this study, we developed a Fe2O3/MoO3 (abbreviated as FMO-x) Z-type heterojunction and achieved efficient degradation of ciprofloxacin (CIP). In-situ irradiated XPS, EPR, and DFT calculations confirmed that the coupling interface of FMO-1 Z-type heterojunction effectively enhanced the charge separation and transfer process, thus generating various ROS (1O2, ·O2−, ·OH and H2O2). In the FMO-1-PEF-like system, H2O2 was generated in-situ through 2e− ORR. In addition, ROS quantitative experiments showed that the yield of 1O2, ·O2− and ·OH was 29.76, 92.54 and 1.09 μmol·L−1 in 60 min, respectively. EPR and XPS results indicated two potential routes for the 1O2 generation: the reaction between ·O2− and Fe3+ and between ·O2− and H2O2. In the FMO-1-PEF-like system, the removal rate of CIP was 97.10 % in 60 min, and the kinetic constant was 0.0626 min−1, which was 1.32 and 1.55 times higher than that of Fe2O3 and MoO3. This work developed a method using Fe2O3/MoO3 Z-type heterojunction to understand the mechanism of the 1O2 generation in the PEF-like system.

A solar-electric dual-driven microporous hydrogel evaporator for all-weather highly efficient water purification

Solar-driven interfacial water evaporation technology holds significant potential for addressing global water scarcity. However, the variable nature of solar intensity in natural environments limits its reliability for all-weather highly efficient water purification. Herein, we develop a novel solar-electric dual-driven water purification evaporator featuring an electrically heated mesh within a microporous hydrogel composed of carbon nanotubes (CNTs) and polyacrylamide (PAAm). The synergistic photothermal and electrothermal effect of the microporous hydrogel enables the dual-driven evaporator to achieve an ultrafast evaporation rate of 16.35 kg m−2 h−1 under one sun irradiation with 3 A current input, demonstrating remarkable superiority to other dual-driven evaporators. Even under dark conditions, the evaporator maintains robust performance, achieving an impressive evaporation rate of 6.45 kg m−2 h−1, which surpasses existing photothermal-driven systems. Significantly, the integration of the solar-electric dual-driven evaporator with solar panels and a mobile power source creates a water purification system that can achieve closed-loop solar energy utilization. A five consecutive rainy day outdoor validation demonstrates that such a system exhibits an excellent average water collection rate of 3.1 kg m−2 d−1. This work provides a convenient and efficient approach to enhance the accessibility of purified water under varying environmental conditions.

Advancing nanoarchitectures of 2D WO3/MXene photoanode for enhanced photoelectrocatalytic oxidation of phenol and arsenic in synthetic wastewater

The photoelectrocatalytic advanced oxidation process (PEAOP) necessitates high-performing and stable photoanodes for the effective oxidation of complex pollutants in industrial wastewater. This study presents the construction of 2D WO3/MXene heteronanostructures for the development of efficient and stable photoanode. The WO3/MXene heterostructure features well-ordered WO3 photoactive sites anchored on micron-sized MXene sheets, providing an increased visible light active catalytic surface area and enhanced electrocatalytic activities for pollutant oxidation. Phenol, a highly toxic compound, was completely oxidized at an applied potential of 0.8 V vs. RHE under visible light irradiation. Systematic optimization of operational conditions for the photoelectrocatalytic oxidation of phenol was conducted. The phenol oxidation mechanism was elucidated via high-performance liquid chromatography (HPLC) analysis and the identification of intermediate compounds. Additionally, a mixed model of phenol and arsenic (III) in polluted water demonstrated the capability of WO3/MXene photoanode for the simultaneous oxidation of both organic and inorganic pollutants, achieving complete conversion of phenol and As(III) to non-toxic As(V). The WO3/MXene photoanode facilitated water oxidation, generating a substantial amount of O2•– and •OH oxidative species, which are crucial for the concurrent oxidation of phenol and arsenic. Recyclability tests demonstrated a 99% retention of performance, confirming the WO3/MXene photoanode's suitability for long-term operation in PEAOPs. The findings suggest that integrating WO3/MXene photoanodes into water purification systems can enhance economic feasibility, reduce energy consumption, and improve efficiency. This PEAOP offers a viable solution to the critical issue of heavy metal and organic chemical pollution in various water bodies, given its scalability and ability to preserve ecosystems while conserving clean water resources.

The influence of recent bushfires on water quality and the operation of water purification systems in regional NSW

Over the past decade, escalating extreme weather events have significantly affected New South Wales (NSW), Australia, with unprecedented droughts and intense fires. Yet, the impact on water quality and purification processes remains insufficiently studied. This research focuses on the immediate changes in NSW's environmental water quality and issues in water purification unit operations following the 2019 bushfires. Water samples and maintenance records from affected catchments, intakes, purification units, and reservoirs were analysed. Compared to control samples, post-bushfire water exhibited high turbidity. Sediment and ash shock loads posed significant threats to aquatic ecosystems. Elevated turbidity, suspended sediments, pH, and alkalinity were major concerns for water purification. Raw water samples showed turbidity exceeding 195 NTU, with flocculation and sedimentation most impacted. Immediate measures included sediment traps, aeration, pre-chlorination, and inline monitoring. These findings inform strategies to mitigate bushfire impacts on water quality and optimise water purification in fire-prone regions.

Effect of Central Dialysis Fluid Delivery System (CDDS) using high flux dialyzer versus Regular Water Treatment Stations on Endotoxemia and Inflammatory Markers among Prevalent Patients on Regular Hemodialysis

Abstract Background and Objectives Translocated endotoxins derived either from intestinal bacteria or backfiltration, have a wide range of adverse effects on patients. Most end stage renal disease (ESRD) patients have systemic inflammation which increases the risk of morbidity and mortality. The central dialysis fluid delivery system (CDDS) has been used exclusively in Japan since 1960s, and now is being used in Ain Shams University. Our aim of the study is to evaluate the effect of (CDDS) versus single patient dialysis fluid delivery system (SPDDS) on endotoxemia and inflammatory markers among prevalent patients on regular hemodialysis (HD). Methods Eighty Patients were randomly selected from HD units, then divided into two groups, (group I) doing HD using CDDS water purification system at El Demerdash Hospital, (group II) using regular water purification system at Ain Shams University Specialized Hospital. Pre- dialysis and post-dialysis serum samples were obtained to measure endotoxin levels of both groups, as well as postdialysis serum samples were obtained to measure interleukin 6 (IL6) level and highly sensitive Creactive protein (Hs CRP). Results Circulating endotoxemia was most notable in group II, The mean predialysis endotoxin level in group I was 0.07 ± 0.05 Eu/mL, while in group II was 0.20 ± 0.07 Eu/mL and mean of post-dialysis endotoxin level in group I was 0.04 ± 0.02 Eu/mL, while in group II was 0.15 ± 0.03 Eu/mL. IL6 as well as Hs CRP levels were higher in group II in comparison to group I. Conclusion Our data showed significant reduction in circulating endotoxins in CDDS group.

An innovative triple interface reinforced photocatalytic system based on BiOCl/BaTiO3@Co-BDC-MOF composite for the simultaneous detoxification of Cr(VI) and sulfamethoxazole

The development of effective photocatalysts for the reduction of Cr(VI) and the degradation of antibiotics remains a challenge. The present work reports the development of a novel heterojunction composite material, BiOCl/BaTiO3@Co-BDC-MOF (BOC/BTO@Co-MOF), based on solvothermal techniques. To characterize the surface and bulk features of the material, techniques such as FE-SEM, HR-TEM, BET/BJH, XPS, FT-IR, p-XRD, and UV–Vis-DRS were used. Based on the results, the BiOCl/BaTiO3 nanocomposites are uniformly dispersed on the rod-shaped Co-BDC MOF, resulting in a layered texture on the surface. A further advantage of the composite structure is the strong interfacial enhancement facilitating the separation of photoexcited electron-hole pairs. Also, compared to its pristine counterparts, the heterostructure material exhibited excellent surface area and pore properties. The photocatalytic efficiency towards reduction and degradation of Cr(VI)/SMX pollutants were evaluated by optimizing various analytical parameters, such as pH, catalytic loading concentrations, analyte concentration, and scavenger role. The specially designed BOC/BTO@Co-MOF composite achieved a 96.5% Cr(VI) reduction and 98.2% SMX degradation under 60.0–90.0 min of visible light illumination at pH 3.0. This material is highly reusable and has a six-time recycling potential. The findings of this study contribute to a better understanding of the efficient decontamination of inorganic and organic pollutants in water purification systems.

Efficient removal of tetrabromobisphenol A in the Mn1Fe0.5Al0.5-LDO@BC/peroxymonosulfate water purification system

Tetrabromobisphenol A (TBBPA) brominated flame retardants in water posed threat to the ecological system due to its persistence and biomagnification. In this work, an efficient water purification system based on sulfate radical-based advanced oxidation processes (SR-AOPs) with Mn1Fe0.5Al0.5-LDO@BC as the core was constructed by adjusting the key preparation parameters, optimizing catalyst performance and exploring operating conditions. Under the optimal conditions of Mn1Fe0.5Al0.5-LDO@BC/PMS system (calcination temperature of 600 oC, 0.1 g/L Mn1Fe0.5Al0.5-LDO@BC, 0.15 mM PMS, pH value of 7–), 15 mg/L TBBPA was almost completely degraded within 30 min. Mn1Fe0.5Al0.5-LDO@BC/PMS water purification system exhibited resistance to inorganic anions and humic acid. In addition, Mn1Fe0.5Al0.5-LDO@BC reflected better cycle stability and ecological environmental protection. Electron paramagnetic resonance (EPR) and quenching experiments verified the existence of a large number of dominant active species in the water purification system, especially the contribution of O2•– and 1O2 to the degradation of TBBPA. Finally, the catalytic mechanism and possible degradation pathway of TBBPA were elucidated, and the toxicity of the intermediates was predicted. This work provided novel insights into the efficient purification of TBBPA brominated flame retardants in wastewater.

PEMBUATAN DAN INSTALASI JAM WAKTU SHOLAT DAN SISTEM PENJERNIHAN AIR DI PONDOK PESANTREN HIDAYATUL MUSLIMIN 1

The community service program is one of the knowledges implementation activities to be useful in the community. This program is also can be used as socializing the D-IV Study Program in Electronics System Engineering Technology (TRSE), Pontianak State Polytechnic to the students in high school. The location of activities was Islamic Boarding School of Hidayatul Muslimin 1 Islamic Boarding School, Kubu Raya Regency. This school including orphanage, Madrasah Tsanawiyah (Junior High School), and Ulya Equivalency Education (High School Level). This program was carried out using service learning method by providing practical technology implementation and brief training on the use of the technology provided. The activities include were build-up dan installations of Prayer Time Clocks (JWS) and water purification systems for wudhu at the Sulaiman Mosque (for female students). In addition to the installation, the school was also given socialization about the installation and use of JWS and the importance of clean water in student’s daily activities. The implementation of this activity, it is hoped that the TRSE Study Program of Pontianak State Polytechnic can be widely recognized and bring more benefits to the community.

Sustainable photoelectrocatalytic oxidation of antibiotics using Ag–CoFe2O4@TiO2 heteronanostructures for eco-friendly wastewater remediation

Developing high-performance and durable catalysts presents a significant challenge for oxidizing toxic inorganic and pharmaceutical compounds in wastewater. Recently, there has been a surge in the development of new heterogeneous catalysts for degrading pharmaceutical compounds, driven by advancements in electrocatalysts and photoelectrocatalysts. In this study, a plasmonic Ag nanoparticles decorated CoFe2O4@TiO2 heteronanostructures have been successfully designed to fabricate a high-performing photoelectrode for the oxidation of pharmaceutical compounds. The developed Ag–CoFe2O4@TiO2 possessed a higher electrochemical stability and effectively harvested the UV to visible and NIR radiation in sunlight which generates the enormous photochemical reactive species that involved in the oxidation of ibuprofen in wastewater. Under direct sunlight irradiation, Ag–CoFe2O4@TiO2 achieved complete oxidation of ibuprofen in wastewater at 0.8 V vs RHE. This indicates that metallic Ag nanoparticles are involved in the charge separation and transport of charge carriers from the photoactive sites of CoFe2O4@TiO2, promoting the generation of abundant hydroxy, oxy, and superoxide radicals that actively break the bonds of ibuprofen. Additionally, oxidation agents such as urea and H2O2 were utilized to enhance the formation of superoxide ions and hydroxyl radicals, which rapidly participate in the oxidation of ibuprofen. Significantly, testing for recyclability confirmed the stability of the Ag–CoFe2O4@TiO2 photoanode, ensuring its suitability for prolonged use in photoelectrochemical advanced oxidation processes. Integrating Ag–CoFe2O4@TiO2 photoanodes into water purification systems could enhance economic feasibility, reduce energy consumption, and improve efficiency.

Photoassisted Water Purification through an Electrochemically Artificially Adjusted p-Cu2O Light Absorption Layer.

The implementation of photoelectrochemical water purification technology can address prevailing environmental challenges that impede the advancement and prosperity of human society. In this study, Cu, which is abundant on Earth, was fabricated using an electrochemical deposition process, in which the preferential orientation direction and carrier concentration of the Cu-based oxide semiconductor were artificially adjusted by carefully controlling the OH- and applied voltage. In particular, Cu2O grown with a sufficient supply of OH- ions exhibited the (111) preferred orientation, and the (200) surface facet was exposed, independently achieving 90% decomposition efficiency in a methyl orange (MO) solution for 100 min. This specialized method minimizes the recombination loss of electron-hole pairs by increasing the charge separation and transport efficiency of the bulk and surface of the Cu2O multifunctional absorption layer. These discoveries and comprehension not only offer valuable perspectives on mitigating self-photocorrosion in Cu2O absorbing layers but also provide a convenient and expeditious method for the mass production of water purification systems that harness unlimited solar energy. These properties enable significant energy saving and promote high-speed independent removal of organic pollutants (i.e., MO reduction) during the water purification process.

Recent Advances in High‐Performance Direct Seawater Electrolysis for “Green” Hydrogen

Electrocatalytic water splitting through the electrolyzer is the most promising strategy for hydrogen production. Recently, water electrolysis is mainly based on high‐purity freshwater, which not only consumes a large number of freshwater resources but also improves the overall cost due to the extra water purification system. Hence, direct electrolysis of seawater is more desirable for large‐scale hydrogen generation. As is known, the dominant rate‐determining step of overall water splitting is the anodic oxygen evolution reaction (OER), which involves four‐electron transfer and owns a much larger overpotential than cathodic hydrogen evolution reaction. The large challenge for the design of OER catalysts in the seawater media is the competition reaction between OER and chloride oxidation reaction, which greatly influences energy efficiency. Hence, except for the activity and stability, selectivity is another key point for seawater splitting. Herein, after a brief introduction of two half reactions for water splitting, the latest metal hydr(oxide) electrocatalysts with different crystalline structures are summarized according to the previous reports. Moreover, the advantages and disadvantages of three common water electrolyzers are compared. Finally, the perspectives of seawater electrolysis for hydrogen production are outlined for practical applications.

Cyanotoxin Monitoring and Detection Using Passive Sampling Application

Cyanobacterial blooms in water have been extensively studied as they produce bioactive and toxic metabolites, commonly known as cyanotoxins. Additionally, the presence of cyanobacteria and, consequently, the production of cyanotoxins, have increased in extent and frequency worldwide. Therefore, the risk associated with the presence of these microorganisms and their toxins has become a matter of great concern. On the other hand, conventional processes for water treatment are inefficient for their elimination and/or degradation, so their presence in water persists at trace and ultra-trace concentrations. In this regard, it is important to develop alternatives to monitor cyanotoxins and allow their detection at low levels in water supply and purification systems, in order to ensure water of good quality for human consumption. In this work, different methodologies, implemented both at laboratory scale and in situ in aqueous bodies, are described. Among these methodologies, traditional and passive techniques are highlighted. Appropriate analytical and sample preparation methods used in the detection and quantification of cyanotoxins are also addressed. It was found that the use of passive samplers is a convenient and a cost-effective method of identifying the presence of these toxins in water at concentrations in the order of µg/L and ng/L. Moreover, studying the by-products generated from the degradation of natural toxins in aquatic environments and evaluating their possible adverse effects is crucial in terms of the management and control of cyanobacteria and cyanotoxin pollution in water.

Stacking regression model approach to mixed convection flow of ternary- nanofluid over slanted surface with magnetic field, waste discharge concentration, and joule heating effects

The current work is carried out to investigate the mixed convection flow behavior of ternary-based nanofluid over an inclined surface in the presence of a magnetic field, waste discharge concentration, and joule heating effects. The governing equations with proper assumptions were converted into ordinary differential equations (ODEs) form by implementing suitable similarity constraints and solved with Runge Kutta Fehlberg 4th 5th order and shooting scheme. The stacking regression model approach is implemented along with the Runge Kutta Fehlberg 4th 5th order technique. The obtained outcomes are presented with graphs, and model correctness is assessed using the combination of Gaussian Process Regression (GPR), Extra Tree Regression (ETR), and Random Forest (RF). The consistency and stability of the model are demonstrated by the closely linked testing and training data. The study outcomes show that the rise in the magnetic constraint will improve the velocity profile while improved values of local pollutant external source and external pollutant source variation parameters will enhance the concentration profile. Enhancement in Eckart number and solid volume fraction values will improve the rate of thermal distribution. Ternary nanofluid shows significant improvement than nanofluid. The surface drag force is increased about 8 %-9 % in assisting flow case and 8 %-17 % for opposing flow case for different values of magnetic parameter, the rate of thermal distribution improved from 75.54 % to 11.55 % in assisting flow case and 16.87 % to 25.70 % in opposing flow case for different values of Eckert number. The study's results might contribute to the advancement of more effective heat exchangers and cooling systems for electronics and engines. Exploration and extraction of oil, as well as the creation of efficient water purification systems.

Integration of down-flow hanging sponge reactor to oreochromis niloticus − Brassica oleracea aquaponics system

Aquaponics is a promising solution for addressing food security concerns. Nonetheless, an effective water-purification system is necessary to achieve high and stable yields of fish and vegetables. This study aimed to evaluate the nitrification and oxygen transfer performance of a laboratory-scale down-flow hanging sponge (DHS) reactor with a Brassica oleracea aquaponics system to treat water in an Oreochromis niloticus closed-aquaculture system. The DHS reactor showed a higher oxygen transfer coefficient (KLa) than the conventional aerator and provided an adequate dissolved oxygen (DO) concentration of approximately 5.5 mg/L essential for O. niloticus growth throughout the experimental period. The evaluated DHS-based aquaponic system maintained high water quality in an aquaculture tank, with a survival rate of 97%. The O. niloticusgrew at a low feed conversion ratio of 1.5–2.1 and a low feeding rate of 0.5% at high stocking densities of 17.5–22.2 kg-fish-weight/m3. 16S rRNA gene sequencing indicated that the DHS sponge carrier effectively retained nitrifying bacteria such as Nitrosomonas and Nitrospira. This study demonstrated that the DHS reactor provided a high DO concentration and that a simultaneous DHS reactor with a hydroponic tank provided a low-cost aquaponic system that could be applied for food production in the aquaculture industry.

The Role of Universiti Malaysia Perlis (UniMAP) In the Socioeconomic Development of Perlis State Through a Social Entrepreneurship Approach

This study examine the role of Universiti Malaysia Perlis (UniMAP) in leveraging social entrepreneurship as an approach to drive sustainable socioeconomic development within the state of Perlis, addressing the unique challenges and opportunities faced by the region. While previous studies have recognized the potential of social entrepreneurship in promoting sustainable development, there is a need for more context-specific research examining the unique challenges and opportunities faced by individual institutions and regions. The case of UniMAP in Perlis presents an opportunity to contribute to this body of knowledge and provide practical insights. The study employs a qualitative research design, utilizing document analysis, semi-structured interviews, focus group discussions, and observational techniques. Data analysis involves thematic analysis, content analysis, and triangulation approaches to ensure credibility and validity of findings. The findings reveal UniMAP's multifaceted community engagement activities, including outreach programs like the "Jom Belajar" program supporting over 500 underprivileged students, service-learning projects such as the solar-powered water purification system, research collaborations like the "Perlis Padi Wangi" project introducing a high-quality rice variety to 150 farmers, social enterprise incubation supporting ventures like "EduKampung" providing over 10,000 hours of online tutoring, and partnerships with local stakeholders and the state government addressing socioeconomic challenges in Perlis. The study underscores UniMAP's vital role in driving socioeconomic development in Perlis through social entrepreneurship, aligning with the state's development goals like the "Perlis Agropreneurship Vision 2025" and contributing to the United Nations Sustainable Development Goals (SDGs). It provides a model for other Malaysian universities and contributes to the broader understanding of integrating social entrepreneurship within higher education for sustainable development.

Sandwich-structured continuous ZIF-8/Ti3C2 MXene/ZIF-8 for efficient sterilization: Enhanced photocatalytic activity, photothermal effect, and environmental safety

The development of effective water purification systems is crucial for controlling and remediating environmental pollution, especially in terms of sterilization. Herein, we demonstrate elaborately designed composite nanosheets with a sandwich structure, composed of two-dimensional (2D) Ti3C2 MXene nanosheet core and conformal ZIF-8 ultrathin outer layers, and their potential applications in photocatalytic sterilization. The study results indicate that the conformal ZIF-8-MXene nanosheet exhibits an expanded light absorption range (826 nm), improved photothermal conversion efficiency (6.2 °C s−1), and photocurrent response, thus boosting photocatalytic sterilization efficiency (6.63 log10 CFU mL−1) against Escherichia coli under simulated sunlight within 90 min. Interestingly, 2D ZIF-8 layers exhibit positive zeta potential (19 mV), good hydrophilicity (40.6°), and local photogenerated-hole accumulation, possessing efficient bacteria-trapping efficiency. Membrane filters fabricated from optimized composite nanosheets exhibit an outstanding bacteria-trapping and sterilization efficiency (almost 100 %) against Escherichia coli under simulated sunlight within 30 min of the flow photocatalytic experiments. This work not only presents a rational structural design of the conformal and ultrathin anchoring of ZIF-8 onto a 2D conductive material for bacteria-trapping and sterilization, but also opens new opportunities for using metal–organic frameworks in photocatalytic disinfection of drinking water.

Solar Based Water Purification System

Abstract: Solar-based water purification is an innovative and sustainable method leveraging solar energy to produce clean drinking water from contaminated sources. This approach integrates various technologies, primarily solar distillation, solar disinfection (SODIS), and solar-powered filtration systems

Application of Chitosan as a Coagulant- A Preliminary Review

One of the best water treatment methods is to use coagulant. Coagulation with metal salts like aluminium or iron salt are commercially use in the treatment of turbid sea water today. However, this type of coagulant might leave toxic residue in the treated water since it is made up from metal or inorganic material. Thus it might affect the health if the water is use for drinking and such else. Several studies on synthetic and organic polymer has been carried out in order to identify which polymer can works as a coagulant to replace the use of metal salts. Chitosan is natural polymer that can be used as a coagulant in the treatment of turbid sea water. Chitosan has been used at water purification system for detoxifying water. This might be due to its ability to form bond or coagulate with other particles. It is able to absorbs greases, oil, and other potential toxins and also have relatively lowest toxicity or risk for human since it is an organic. The contamination of water can affect both physical and chemical properties of water. Thus it is essential for the sea water to be treated to remove the turbidity so that the water can be used safely. There are many methods that can be used in the water treatment but may produce different properties of treated water. Some treated water may have poor microbiological quality which is unsafe to be use or consumed by human.

TIO2-MOS2 PAPER BASED MEMBRANE FOR SOLAR EVAPORATION

Clean water scarcity is a critical issue faced by the world. It was caused by insufficient potable water supply and a high cost of water purification systems. As a result, a photothermal evaporator system with the property to absorb light/solar energy and then convert it to heat energy has been rapidly developed. In this work, a solar-driven water evaporation was designed for desalination. The solar evaporator comprises a photothermal molybdenum disulfide-titanium dioxide (MoS2-TiO2) composite layer supported onto a cheap filter paper attached. The filter paper was attached to polystyrene foam for support and cotton thread in the centre of the filter paper for water transportation. MoS2-TiO2 composite was synthesized and coated onto the filter paper using a simple vacuum-assisted method. Before the solar-driven water evaporation testing, the MoS2-TiO2 composite was first characterized using XRD and Raman spectroscopy. The characterization results indicate that MoS2 introduction into the TiO2 structure improved the photosensitivity due to the reduction of the bandgap energy from 3.1 eV for TiO2 to 1.6 eV. The performance of the developed solar evaporator was tested using 35,000 ppm NaCl solution under sunlight for 24 h intermittently. The TiO2-MoS2 solar evaporator was observed to have the highest photothermal ability, with 0.807 kg‧m-2‧h-1 evaporation performance and 55.9 % photothermal efficiency compared to other solar evaporators. This indicated that introducing the photothermal MoS2-TiO2 layer could enhance the solar evaporator performances, making it promising for the desalination application, particularly in impoverished areas with water scarcity.

Evaluating the Efficiency of the Water Purification System Using Nanofilters and Magnetic Fields: The Eastern Parts of Wasit Province are an Example

تم في هذا البحث تصميم منظومة بحثية لتنقية المياه باعتماد الفلاتر النانوية والمجالات المغناطيسية وتم جلب العينات من سبعة مناطق تتواجد فيها المياه السطحية شرق محافظة واسط وهي (ناظم أم الجري، نهر دجلة/ شمال شيخ سعد، نهر دجلة / مركز شيخ سعد، نهر الجباب، هور الشويجة، عين الجبل/ كاني ساخت، عين الجبل / مركز الجبل)، تم قياس الخصائص النوعية للمياه مثل الرقم الهيدروجيني والتوصيلية الكهربائية والاملاح الذائبة قبل المعالجة و بعد المعالجة حيث أظهرت النتائج تنقية كبيرة لجميع الشوائب و العوالق والاملاح وتم مقارنة النتائج مع المعايير العراقية لمياه الشرب والمياه المعبأة ومعايير الصحة العالمية WHO حيث بينت النتائج ان المياه المعالجة بهذه المنظومة تتفق مع هذه المعايير وبنقاوة عالية جدا