Cleaner Water最新文献

{"title":"The water footprint of pig farms in Ireland based on commercial farm data","authors":"Shilpi Misra ,&nbsp;Corina E. van Middelaar ,&nbsp;Keelin O’Driscoll ,&nbsp;Amy J. Quinn ,&nbsp;Imke J.M. de Boer ,&nbsp;John Upton","doi":"10.1016/j.clwat.2024.100023","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100023","url":null,"abstract":"<div><p>Livestock production is getting increased attention due to its impact on natural resources, and freshwater is one such limited resource. To reduce the pressure on freshwater use and develop sustainable livestock systems from farm-to-fork we need to study the whole production cycle, and look for hotspots of major freshwater use. Considering this, we chose intensive pork production as our focal livestock system, since it is one the most eaten meats globally. We focused on pork production in Ireland and studied the freshwater use (green and blue) from cradle-to-farm gate using the water footprint (WFP) method. Detailed farm data (e.g. diet composition, production data) were combined with on-farm water meter data to explore variations in water consumption between farms, and potential explanatory variables for differences in consumption between farms. So far, there have been no WFP studies in pork production that explored this, and insight into variation could help to identify options for improvement. We analyzed the direct (on-farm) and indirect (off-farm) green and blue water footprint of 10 Irish pig farms. Our results show that the average total WFP, including the direct and indirect water footprint, was 2537 L/kg pork, which is at the low end of previously published studies. The indirect green water footprint related to the production of purchased feed was responsible for the largest share (99 %) of the total WFP. The direct blue water footprint formed only a minor component of the total WFP (14 L/kg pork), with drinking water playing the major role. We can conclude from this study that variation in WFP between the least and most efficient farms was small (Q3-Q1 = 181 L/kg pork); nevertheless, this indicates that efficiencies of around 7 % could be gained by the least efficient cohort of farms by adjusting on-farm management practices. We also found a weak negative correlation between WFP and farm size, and WFP and meat produced. Overall, this study suggests that to reduce the burden on freshwater resources and reduce the pork WFP, future research should focus on the feed related impacts.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100023"},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000218/pdfft?md5=385c2ff286221373627d13d171cb42b0&pid=1-s2.0-S2950263224000218-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141483488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coral sands as potential low cost treatment for removing fluoride from drinking water","authors":"M.H. Lecompte ,&nbsp;B. Robinson ,&nbsp;S. Gaw","doi":"10.1016/j.clwat.2024.100025","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100025","url":null,"abstract":"<div><p>Fluoride (F-) toxicity from contaminated drinking water affects over 200 million people worldwide. While defluoridation with adsorbents such as calcium carbonate, is commonly used, most technologies are unsuitable for resource-constrained areas. Coral sand is readily available in tropical regions but is yet to be investigated as a potential F- adsorbent. The effectiveness of coral sand at removing F- from drinking water was assessed using acid-enhanced lime defluoridation with two beach (Kiribati and Vanuatu) and one commercially available coral sands. Citric acid was selected as it is readily accessible, palatable and safe for human consumption. Mini columns with a 5:1 sand-to-fluid ratio, 0.025 M citric acid and a 4-hour residence time, could be used seven times to reduce F- from 10 mg/L to below the World Health Organization (WHO) guideline value of 1.5 mg/L. Mini columns packed with coarser grained (1.3 mm) Vanuatu sand could be used at least 10 times. Increasing citric acid to 0.050 M reduced removal efficiency. Prototype treatment devices, developed using 1 L polyethylene jerrycans and 1 kg of commercial sand, could only be used a maximum of three times with 0.025 M citric acid. All coral sands contained F- as well as other trace elements of human health concern, including As, B, Cr, Mn, and Ni that were released into the treated water, resulting in exceedances of drinking water standards. Total Cr concentrations in treated water always exceeded the 0.05 mg/L WHO health guideline whereas As exceeded the 0.01 mg/L value in the majority of treated water samples. In addition, B, Na, and Ni concentrations exceeded the WHO guidelines in many water samples treated with Kiribati and Vanuatu sands. Treated water samples were also unpalatable as potable water based on hardness, total dissolved solids and elevated concentrations of Al, Fe, and Mn. It is recommended that drinking water treated with coral sand be analysed for the presence of contaminants of health concern.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100025"},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000231/pdfft?md5=4e7f41276d1bf560f347944044d31d8c&pid=1-s2.0-S2950263224000231-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141540555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Remote sensing insights for sustainable development: Water quality and landscape dynamics in Mirik Lake, Darjeeling District, West Bengal, India","authors":"Subhra Halder ,&nbsp;Suddhasil Bose","doi":"10.1016/j.clwat.2024.100024","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100024","url":null,"abstract":"<div><p>The study employs remote sensing and GIS techniques to assess the water quality dynamics of Mirik Lake, located in the Darjeeling Himalayas, West Bengal, India. To analyse the impact of land use and land cover (LULC) changes on the water quality of Mirik Lake from 1993 to 2023. Landsat imagery spanning from 1993 to 2023 was used to detect significant alterations in LULC patterns. Remote sensing and GIS techniques were utilised to analyse the data, focusing on changes in LULC and their implications for water quality. The results indicate a steady increase in total phosphorus (TP), total nitrogen (TN), and Biological Oxygen Demand (BOD) levels, attributed to anthropogenic activities such as urbanisation and tourism development. LULC change analysis highlights the expanding built-up areas and agricultural lands surrounding the lake, contributing to nutrient loading and organic pollution. The spatial distribution of pollution categories underscores the influence of tourist infrastructure on water quality degradation. Integrated watershed management and sustainable development strategies are recommended to mitigate anthropogenic impacts and preserve the ecological integrity of Mirik Lake.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100024"},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S295026322400022X/pdfft?md5=df1d8ea482fd9e6b7af54ccbb1aacfdb&pid=1-s2.0-S295026322400022X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141483487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar","authors":"Ahsan Shah ,&nbsp;Arun Arjunan ,&nbsp;Anusha Thumma ,&nbsp;Julia Zakharova ,&nbsp;Timothy Bolarinwa ,&nbsp;Shreah Devi ,&nbsp;Maryam Batool","doi":"10.1016/j.clwat.2024.100022","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100022","url":null,"abstract":"<div><p>This paper reveals a green chemistry approach to remove arsenic (As⁺³) from water using potassium hydroxide (KOH) modified sewage sludge-derived biochar (SSDB-KOH). Characterisation of the morphology, particle size and composition of the SSDB-KOH pre- and post-adsorption confirmed porous and heterogenous surface favouring adsorption. At ambient temperature (20 °C), the SSDB-KOH dose of 20 g/l achieved 98 % arsenite removal at nearly neutral solution pH (8). This compared favourably with pristine SSDB, where the performance was limited to 41.6 % removal. The enhanced arsenite adsorption of SSDB-KOH was informed by several mechanisms, including ionic interactions, pore filling and metal-pi interactions. The experimental data fits closely with the Langmuir isotherm and pseudo-second-order kinetic models, revealing monolayer adsorption and the chemical interaction between adsorbents and the adsorbate. The spontaneous and endothermic nature of the process was confirmed by the negative value of ΔG and the positive value of ΔH, respectively. The performance of the biochar was evaluated for four-cycle regeneration. Finally, a cost analysis was performed to demonstrate the economic feasibility of using SSDB-KOH to remove arsenic from water.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100022"},"PeriodicalIF":0.0,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000206/pdfft?md5=678d6fa786b0dabc7f85f92e4c253305&pid=1-s2.0-S2950263224000206-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141434910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of health index and hospitals on dissemination of antibiotic resistance in two sewersheds of the third largest metropolitan region of Brazil","authors":"Henrique Alves Santos,&nbsp;Ana Paula Assad de Carvalho,&nbsp;Juliana Calábria de Araújo","doi":"10.1016/j.clwat.2024.100021","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100021","url":null,"abstract":"<div><p>Antimicrobial resistance (AMR) stands as a critical threat to global public health. Wastewater-based epidemiology (WBE) provides health data within communities via sewage analysis. This study delved into antibiotic resistance prevalence across two sewersheds in Belo Horizonte, each with distinct health vulnerability indexes (HVI) and number of hospitals. Bacteria resistant (ARB) to amoxicillin, azithromycin, cephalexin, sulfamethoxazole + trimethoprim, meropenem and ARGs (<em>Intl1</em>, <em>sul1</em>, <em>blaTEM, blaKPC</em>) were quantified in sewage from the two sewersheds over the years from 2020 to 2023. Statistical analysis revealed no significant differences in median concentrations of ARBs between sewersheds, except for bacteria resistant to meropenem. ARGs Investigated exhibited similar patterns, with <em>blaKPC</em> showing statistical significant difference. This suggests that hospital density within a sewershed exerts a more pronounced influence on AMR dissemination than HVI. The difference found in meropenem-resistant bacteria, a hospital-prescribed carbapenem, and <em>blaKPC</em> concentrations underscores the impact of hospital antibiotic usage. Thus, the presence and number of hospitals emerges as a pivotal factor in AMR spread, emphasizing the need for specific treatment and management of hospital wastewater to curb antimicrobial resistance.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100021"},"PeriodicalIF":0.0,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S295026322400019X/pdfft?md5=02a3ff15665d142459f0ba66a195435d&pid=1-s2.0-S295026322400019X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141429525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Redefining sustainability: Next-gen wastewater treatment breakthroughs","authors":"Rida Batool ,&nbsp;Sahrish ,&nbsp;Syed Abdul Ahad ,&nbsp;Quratulain Maqsood ,&nbsp;Shinawar Waseem Ali ,&nbsp;Syed Mohsin Abbas","doi":"10.1016/j.clwat.2024.100018","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100018","url":null,"abstract":"<div><p>The world is facing an alarming situation in terms of pollution, with water contamination being a critical concern for scientists aiming to protect the ecosystem. Contaminants produced from municipal, industrial, commercial, and agricultural processes, along with domestic activities, pose serious threats to aquatic life and human welfare. Addressing these pollutants requires serious attention. Various physical, chemical, and biological approaches are used for water purification, each showing different levels of efficacy. Recent advancements in wastewater treatment techniques, such as Non-Thermal Plasma Discharge, Genetic Engineering, Nanotechnology, CRISPR-Cas9, Elimination of Emerging Organic Pollutants (EOPs), and the use of durable substrates with Metal-Organic Frameworks (MOFs) and covalent organic frameworks, have shown promising results. For example, Nanotechnology has demonstrated a removal efficiency of up to 95% for heavy metals, while MOFs have achieved over 90% efficiency in organic pollutant degradation. The effectiveness of these techniques varies depending on the pollutant type and environmental factors. Consequently, selecting the appropriate method is crucial for achieving better and cost-effective outcomes in water treatment.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"1 ","pages":"Article 100018"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000164/pdfft?md5=505fb6b478f751bddeb636174cdde544&pid=1-s2.0-S2950263224000164-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141238966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potable water boiling can induce havoc in the water quality management arena due to the presence of microplastics","authors":"Renjith VishnuRadhan ,&nbsp;Shagnika Das ,&nbsp;Camille Hennion ,&nbsp;T.I. Eldho ,&nbsp;Anil Lonappan","doi":"10.1016/j.clwat.2024.100019","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100019","url":null,"abstract":"<div><p>Around 30 % of the world’s population lacks access to safe water despite being a critical factor that modulates the complex dynamics of ecosystems and societies. Efficient technologies to purify water to potable form are either inaccessible or economically not viable for the majority. Water poverty and scarcity can be potentially exacerbated by the recent, widespread detection of plastics in drinking water sources, tap water and groundwater. This can induce various emerging bottle necks in global drinking water quality management. One of the most affordable disinfection techniques practiced across the world is to boil the water. Plastic pollutants in potable water sources can pose emerging water quality management bottlenecks, including leaching additives and chemicals due to water boiling. Exposure to plastic leachates in drinking water can lead to potential health risks, including oxidative stress, cancers, endocrine disruption, cardiovascular diseases, and developmental effects. The current global drinking water scenario and the emerging impacts of plastic pollutants specifically micro- and nano-plastics in drinking water, are also enlisted. Further, evidence-based prospects for drinking water quality management and impacts on one health initiative in the wake of the presence of plastics are discussed. Monitoring and surveillance, improved water treatment, and infrastructure incorporating technological innovations explicitly focusing on plastic pollutants in drinking water can ensure sustainable management and mitigation of the ill effects to a satisfactory extent. The need for firm policy instruments, partnerships between various private and public stakeholders, and the judicious use and management of potable water are contented in this article, which will steer humanity and the earth system toward achieving one health mandate and a sustainable future.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"1 ","pages":"Article 100019"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000176/pdfft?md5=e5e8ecbdcf1308505b9675c4dab2160b&pid=1-s2.0-S2950263224000176-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141238968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel Zeolite 5Å-Co-Fe based catalytic ozonation process for the efficient degradation of Oxytetracycline in veterinary pharmaceutical wastewater","authors":"Amir Ikhlaq ,&nbsp;Asma Naeem ,&nbsp;Osama Shaheen Rizvi ,&nbsp;Asia Akram ,&nbsp;Abdul Mannan Zafar ,&nbsp;Fei Qi ,&nbsp;Ashraf Aly Hassan","doi":"10.1016/j.clwat.2024.100017","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100017","url":null,"abstract":"<div><p>Public health and the aquatic environment face significant threats from pollution originating from pharmaceutical wastewater (PhWW) containing stubborn antibiotics. Conventional treatment methods fail to fully eradicate these antibiotics and other contaminants ^{such as COD and BOD}₅ due to the complex organic compound mixtures present in PhWW. Additionally, PhWW exhibits low biodegradability and high toxicity, mainly due to the persistence of antibiotics. This pressing issue has prompted the scientific community to seek more effective and cost-efficient treatment solutions for detoxifying PhWW. Hence, this study explores the catalytic efficiency of zeolite 5 Å (Z5Å) coated with cobalt and iron (Z5Å-Co-Fe) for the abatement of one of the most persistent organic pollutants oxytetracycline (OTC) as a target pollutant. The synthesized catalyst is assessed using various analytical techniques such as FTIR, SEM, and EDX analysis. Results show that the heterogeneous catalytic ozonation using cobalt and iron-loaded zeolite (Z5Å-Co-Fe/O₃) achieves OTC removal rates of 8%, 67%, and 95% through adsorption, ozonation (O₃), and Z5Å-Co-Fe/O₃ processes, respectively, ^{at pH 6, 1.6 mg/min of O}₃ ^{flow and 15 min of treatment time}. Moreover, the Z5Å-Co-Fe/O₃ process demonstrates higher cost-effectiveness compared to other methods, and electrical energy per order (EEO) of 1.47 USD and 1.62 kWh per cubic meter of PhWW respectively. Additionally, it enhances the biodegradability of PhWW from 0.30 to 0.51, making it more suitable for further secondary treatment. Furthermore, Z5Å-Co-Fe/O₃ treated PhWW meets National Environmental Quality Standards (NEQS) and holds promise as a pretreatment option for industrial-scale conventional treatment systems. Therefore, it is concluded that the Z5Å-Co-Fe/O₃ process was found to be highly efficient for the degradation of OTC in real PhWW matrix and it may help to achieve UN sustainable development goals (SDGs)</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"1 ","pages":"Article 100017"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000152/pdfft?md5=11f54f0a72650adca0f42d4641ee84f1&pid=1-s2.0-S2950263224000152-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141238972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing a semi-empirical model performance to predict the wetting patterns in subsurface drip irrigation","authors":"Saeid Zamani ,&nbsp;Kaveh Ostad-Ali-Askari ,&nbsp;Rouhollah Fatahi Nafchi ,&nbsp;Giuseppe Provenzano","doi":"10.1016/j.clwat.2024.100020","DOIUrl":"https://doi.org/10.1016/j.clwat.2024.100020","url":null,"abstract":"<div><h3>Context</h3><p>Because of the complexity of soil water distribution, accurate prediction of wetting pattern is not easily accessible and this has led to a inefficiency in some proposed models in the literature. These models do not consider the hydraulic characteristics of the irrigation system and are developed solely on the basis of the water volume or infiltration rate, soil hydrodynamic properties, and other conditions of the percolation environment.</p></div><div><h3>Objective</h3><p>Due to the importance of the estimation of wetting front beneath Subsurface Drip Irrigation (SDI) laterals, a semi-empirical model using easily accessible data of the SDI system is proposed to predict the wetting patterns in both distribution and redistribution phases. The aforementioned model has been developed based on a novel approach that couples the governing equations of the lateral hydraulics with empirical equations derived by dimensional analysis.</p></div><div><h3>Methods</h3><p>To develop the model and evaluate its performance, three 16-mm drip line pipes with 0.2, 0.4, and 0.5 m emitter spacing, and 2–5 l/h discharge were placed at 0.20 m depth in a soil box filled with clay loam soil. Water was applied for 3 hours at 50, 100, and 150 kPa operating pressures, and the wetting patterns’ geometries were measured in each lateral after 1, 2, 3, and 24 h. The performance of the model was then assessed and compared with that of three other models.</p></div><div><h3>Results and conclusion</h3><p>The result demonstrated that the proposed model provides the most accurate estimations of the wetting depths and widths. RMSE and MAE statistical indexes of the wetting depth were 0.001–0.002 m and 0.004–0.009 m, respectively, whereas those associated with the wetting width were 0.001–0.003 m and 0.005–0.016 m, respectively. These values resulted in the lowest error when compared with the corresponding obtained from other well-known models. Consequently, the model allows acceptable predictions of the wetting patterns using accessible hydraulic parameters of the SDI system.</p></div><div><h3>Significance</h3><p>Uniquely, the results of the lateral hydraulic analysis were applied to determine the wetting front dimensions in this study. Also, the results demonstrated that the model was successful in wetting pattern prediction beneath the lateral as a line source. While other models usually are used to estimate the wetting front around a point source.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"1 ","pages":"Article 100020"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000188/pdfft?md5=e9ca3fea6e55c86cdd0a8dfb7137a9bc&pid=1-s2.0-S2950263224000188-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141238967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and application of synthesized calcium alginate-graphene oxide for the removal of Cr3+, Cu2+ and Cd2+ ions from tannery effluents","authors":"Sobur Ahmed ,&nbsp;Tasrina Rabia Choudhury ,&nbsp;Md. Zahangir Alam ,&nbsp;Mohammad Nurnabi","doi":"10.1016/j.clwat.2024.100016","DOIUrl":"10.1016/j.clwat.2024.100016","url":null,"abstract":"<div><p>Environmental sustainability has gained acceptance to achieving the goal of a secure ecosystem with a reliable management system. Heavy metal remediation of aqueous streams is of special concern due to the intractability and persistence in the environment. Adsorption is a potential alternative to the existing inefficient conventional technologies for the removal and recovery of metal ions from aqueous solutions and becomes vital to align with the Sustainable Development Goals (SDGs) and mitigate the adverse environmental and social impacts. Calcium Alginate-Graphene oxide (CA-GO) composite has been synthesized for the adsorption of heavy metals including Cr³⁺, Cu²⁺, and Cd²⁺ ions from tannery effluents. Graphene oxide is prepared from commercial graphite powder and reacted with sodium alginate and calcium chloride to form the beads of CA-GO composite. The developed composite was characterized by FTIR, elemental analysis, SEM, XRD analysis, and Raman spectroscopy. Moreover, the effect of pH, adsorbent dosage, contact time, and initial concentration of metal ions on the adsorption capacity were investigated through batch experiments. At a pH&gt;3.0 (pHzpc), the carboxyl group of CA-GO was deprotonated to make the surface negatively charged and facilitate metal adsorption. The optimum pH and maximum adsorption capacity of CA-GO for removal of Cr(III), Cu(II), and Cd(II) were 4.5, 6.0, and 7.0, and 90.58, 108.57, and 134.77 mg g⁻¹, respectively. The kinetics, adsorption isotherms, and thermodynamics were studied to determine the adsorption mechanism. The kinetic of adsorption adopted the second-order model. Thermodynamic parameter were calculated and the adsorption process was determined to be exothermic and spontaneous at room temperature. The developed composite has been efficaciously applied for the removal of metal ions and pollution from real tannery effluents.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"1 ","pages":"Article 100016"},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000140/pdfft?md5=ae15bc62317288b6e46fb4138571e7c5&pid=1-s2.0-S2950263224000140-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141033224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}