Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2025.100593
Shaikha S. AlNeyadi
A nitrogen-phosphazene-based covalent organic framework (PT-COF) has been synthesized for the selective and efficient removal of lead (Pb²⁺) ions from contaminated water. Constructed through a solvothermal reaction between hexa(4-formyl-phenoxy)cyclotriphosphazene and 1,3,5-tris-(4-aminophenyl)triazine, PT-COF exhibits a remarkable adsorption capacity of 940 mg/g, outperforming many conventional adsorbents. Adsorption equilibrium is achieved within just 20 min, highlighting its rapid kinetics. The material demonstrates exceptional selectivity for Pb²⁺ ions, even in the presence of competing contaminants, making it highly effective in complex water treatment scenarios. Moreover, PT-COF features a visual colorimetric indicator, transitioning from yellow to dark brown during Pb²⁺ ion adsorption, simplifying real-time monitoring. Its reusability was confirmed through five successful regeneration cycles without significant loss of efficiency, presenting PT-COF as a sustainable, cost-effective, and practical solution for industrial water purification and the mitigation of environmental lead pollution.
{"title":"Phosphazene-based covalent organic framework: Advanced lead-capture material with visual indicator for efficient water purification","authors":"Shaikha S. AlNeyadi","doi":"10.1016/j.hazadv.2025.100593","DOIUrl":"10.1016/j.hazadv.2025.100593","url":null,"abstract":"<div><div>A nitrogen-phosphazene-based covalent organic framework (PT-COF) has been synthesized for the selective and efficient removal of lead (Pb²⁺) ions from contaminated water. Constructed through a solvothermal reaction between hexa(4-formyl-phenoxy)cyclotriphosphazene and 1,3,5-tris-(4-aminophenyl)triazine, PT-COF exhibits a remarkable adsorption capacity of 940 mg/g, outperforming many conventional adsorbents. Adsorption equilibrium is achieved within just 20 min, highlighting its rapid kinetics. The material demonstrates exceptional selectivity for Pb²⁺ ions, even in the presence of competing contaminants, making it highly effective in complex water treatment scenarios. Moreover, PT-COF features a visual colorimetric indicator, transitioning from yellow to dark brown during Pb²⁺ ion adsorption, simplifying real-time monitoring. Its reusability was confirmed through five successful regeneration cycles without significant loss of efficiency, presenting PT-COF as a sustainable, cost-effective, and practical solution for industrial water purification and the mitigation of environmental lead pollution.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100593"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175909","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}
Groundwater is one of nature's most important resources for providing human water needs and maintaining ecosystems. This study attempts a comprehensive analysis of the application of remote sensing and GIS techniques in groundwater and aquifer management, with a specific focus on the current state of groundwater resources and various management strategies implemented to ensure sustainability. Remote sensing and geographical information systems have emerged as powerful tools for monitoring and managing groundwater resources. The study utilizes field data and explores the use of satellite imagery and geospatial data to assess groundwater availability, recharge, and management. Rajnandgaon district has undertaken significant measures in aquifer management through the construction of 2087 mini percolation tanks across 813 Gram Panchayats in 9 blocks and other structures. These tanks have a cumulative storage capacity of 16.3 lakh cubic meters, facilitating the recharge of aquifers. The mini percolation tanks project has proven to be highly successful, both in terms of job creation and aquifer management for groundwater recharge. The total of 3,539 works executed has offered employment to a considerable number of people, totaling 7,135,677 man-days of work. Geotagging techniques were used to locate lakes (5,386) in all blocks of Rajnandgaon district through a field survey. Geotagged data were used for scientific research, monitoring changes in water bodies over time, and evaluating the effectiveness of water management and conservation efforts. This study encompasses a comprehensive approach, combining scientific and policy perspectives to provide a holistic understanding of groundwater dynamics, aquifer management, contamination risks, and regulatory frameworks.
{"title":"Integrated GIS-based aquifer management system: A case study of Rajnandgaon District, Chhattisgarh, India","authors":"Amit Kumar , Suruchi Singh , Manoj Kumar Patley , Faiz Memon , Ravendra Kumar Singh , Sapna Kinattinkara , Thangavelu Arumugam","doi":"10.1016/j.hazadv.2024.100586","DOIUrl":"10.1016/j.hazadv.2024.100586","url":null,"abstract":"<div><div>Groundwater is one of nature's most important resources for providing human water needs and maintaining ecosystems. This study attempts a comprehensive analysis of the application of remote sensing and GIS techniques in groundwater and aquifer management, with a specific focus on the current state of groundwater resources and various management strategies implemented to ensure sustainability. Remote sensing and geographical information systems have emerged as powerful tools for monitoring and managing groundwater resources. The study utilizes field data and explores the use of satellite imagery and geospatial data to assess groundwater availability, recharge, and management. Rajnandgaon district has undertaken significant measures in aquifer management through the construction of 2087 mini percolation tanks across 813 Gram Panchayats in 9 blocks and other structures. These tanks have a cumulative storage capacity of 16.3 lakh cubic meters, facilitating the recharge of aquifers. The mini percolation tanks project has proven to be highly successful, both in terms of job creation and aquifer management for groundwater recharge. The total of 3,539 works executed has offered employment to a considerable number of people, totaling 7,135,677 man-days of work. Geotagging techniques were used to locate lakes (5,386) in all blocks of Rajnandgaon district through a field survey. Geotagged data were used for scientific research, monitoring changes in water bodies over time, and evaluating the effectiveness of water management and conservation efforts. This study encompasses a comprehensive approach, combining scientific and policy perspectives to provide a holistic understanding of groundwater dynamics, aquifer management, contamination risks, and regulatory frameworks.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100586"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175911","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2025.100614
Sachin G. Rathod , Anjana K. Vala , Vaibhav A. Mantri
Marine environment is increasingly threatened by pollutants such as heavy metals, hydrocarbons, oil residues, and plastics, which disrupt water quality, ecological balance, and biodiversity. This study aims to assess the resilience of the endemic macroalga Ulva ovata to heavy metal pollution and explore its potential as a bioindicator of environmental contamination. We investigated heavy metal concentrations in Ulva ovata, sediment and seawater from five sites in the Gulf of Khambhat (GoK), impacted by effluents from Asia's largest ship-breaking and recycling yard, Alang-Sosiya. U. ovata accumulated higher metal concentrations than sediment and seawater, with the order Fe > Al >> Zn > Mn > Cr > Ni > Cu > Co > Pb > Hg > As > Cd. Seasonal variations in As, Cd, Hg, Pb, and Co were observed in U. ovata, while Ni, Cr and Co fluctuated in sediment, and As, Cr, Mn, Ni, Cd and Co in seawater. Principal component analysis (PCA) revealed a strong correlation between U. ovata, sediment and seawater, confirming its role as a bioindicator. Bioconcentration Factor (BCF) analysis showed U. ovata primarily accumulates metals from seawater, while Cd, Cu and Pb are sourced from sediment. Pollution indices (Igeo and CF) indicated minimal anthropogenic impact, with a low Heavy Metal Evaluation Index (HEI) suggesting relatively uncontaminated conditions. In vitro treatments of arsenic [As(V)] and chromium [Cr(VI)] showed no significant impact on key physiological parameters, though reduced respiration indicated subtle stress. These findings highlight the resilience of U. ovata to heavy metal pollution and its significance as a biomonitor, supporting further exploration of its adaptive mechanisms.
{"title":"Resilience of endemic macroalga Ulva ovata (Ulvaceae, Chlorophyta) to heavy metal contamination in the Gulf of Khambhat, India","authors":"Sachin G. Rathod , Anjana K. Vala , Vaibhav A. Mantri","doi":"10.1016/j.hazadv.2025.100614","DOIUrl":"10.1016/j.hazadv.2025.100614","url":null,"abstract":"<div><div>Marine environment is increasingly threatened by pollutants such as heavy metals, hydrocarbons, oil residues, and plastics, which disrupt water quality, ecological balance, and biodiversity. This study aims to assess the resilience of the endemic macroalga <em>Ulva ovata</em> to heavy metal pollution and explore its potential as a bioindicator of environmental contamination. We investigated heavy metal concentrations in <em>Ulva ovata</em>, sediment and seawater from five sites in the Gulf of Khambhat (GoK), impacted by effluents from Asia's largest ship-breaking and recycling yard, Alang-Sosiya. <em>U. ovata</em> accumulated higher metal concentrations than sediment and seawater, with the order Fe > Al >> Zn > Mn > Cr > Ni > Cu > Co > Pb > Hg > As > Cd. Seasonal variations in As, Cd, Hg, Pb, and Co were observed in <em>U. ovata</em>, while Ni, Cr and Co fluctuated in sediment, and As, Cr, Mn, Ni, Cd and Co in seawater. Principal component analysis (PCA) revealed a strong correlation between <em>U. ovata</em>, sediment and seawater, confirming its role as a bioindicator. Bioconcentration Factor (BCF) analysis showed <em>U. ovata</em> primarily accumulates metals from seawater, while Cd, Cu and Pb are sourced from sediment. Pollution indices (Igeo and CF) indicated minimal anthropogenic impact, with a low Heavy Metal Evaluation Index (HEI) suggesting relatively uncontaminated conditions. <em>In vitro</em> treatments of arsenic [As(V)] and chromium [Cr(VI)] showed no significant impact on key physiological parameters, though reduced respiration indicated subtle stress. These findings highlight the resilience of <em>U. ovata</em> to heavy metal pollution and its significance as a biomonitor, supporting further exploration of its adaptive mechanisms.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100614"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176568","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2024.100571
Saiqa Andleeb , Muqaddas Munir , Muhammad Ishtiaq Ali , Kaleem Imdad , Ramalingam Balachandar , Ravishankar Ram Mani , Murugesan Chandrasekaran , Sumathi Jones , Arunkumar Radhakrishnan , Soon Woong Chang , Balasubramani Ravindran
Plastic has a significant hazard to the environment, but its impact could be mitigated through degradation processes. Biodegradation of plastic wastes by using microorganisms is an environment-friendly method. In the current study, vermibacterial strains i.e. Bacillus mycoides, Bacillus megaterium, Bacillus mojavensis, Bacillus thuringiensis, and Bacillus paranthracis, were selected to evaluate the degrading impact on polyvinyl chloride (PVC) and tested under various physicochemical conditions such as pH (7, 5, 9), temperature (37 °C and 50 °C), carbon sources (Glucose and sucrose), and nitrogen sources (yeast extract and peptone). Liquid culture technique was used to investigate the chloride production and solid media experiment was employed for biodegradation of polyvinylchloride films. Bacillus mojavensis and Bacillus paranthracis showed maximum chloride production of 88.4 % and 87.8 % at pH 7 and 50 °C in the absence of carbon and nitrogen sources. On the other hand, Bacillus megaterium and Bacillus mojavensis showed maximum chloride production (91 % and 91.7 %) at pH 7 and 50 °C in the presence of glucose and yeast extract after 5 days of incubation while all vermibacteria indicated the highest chloride production at pH 9 and 50 °C in the presence of sucrose and yeast extract except Bacillus thuringiensis. Similarly, Bacillus mojavensis, Bacillus paranthracis, and Bacillus thuringiensis showed maximum chloride production in the presence of sucrose and peptone. Scanning electron microscopy was used to check the morphological changes of the PVC film after vermibacteria treatments and results revealed that vermibacteria attached to PVC films and validated the changes in surface topography. Fourier-transform infrared spectroscopy also revealed the changes in functional group intensity on both vermibacteria-treated PVC films compared to the control. It was concluded that plastic biodegradation via vermibacteria could be a potential source not only to eliminate plastic-based environmental issues but also holds the potential to significantly improve human health, reduce pollution, and support sustainable practices for a cleaner and healthier environment.
{"title":"Biodegradation of polyvinyl chloride using vermibacteria under variable physicochemical conditions","authors":"Saiqa Andleeb , Muqaddas Munir , Muhammad Ishtiaq Ali , Kaleem Imdad , Ramalingam Balachandar , Ravishankar Ram Mani , Murugesan Chandrasekaran , Sumathi Jones , Arunkumar Radhakrishnan , Soon Woong Chang , Balasubramani Ravindran","doi":"10.1016/j.hazadv.2024.100571","DOIUrl":"10.1016/j.hazadv.2024.100571","url":null,"abstract":"<div><div>Plastic has a significant hazard to the environment, but its impact could be mitigated through degradation processes. Biodegradation of plastic wastes by using microorganisms is an environment-friendly method. In the current study, vermibacterial strains i.e. <em>Bacillus mycoides, Bacillus megaterium, Bacillus mojavensis, Bacillus thuringiensis,</em> and <em>Bacillus paranthracis,</em> were selected to evaluate the degrading impact on polyvinyl chloride (PVC) and tested under various physicochemical conditions such as pH (7, 5, 9), temperature (37 °C and 50 °C), carbon sources (Glucose and sucrose), and nitrogen sources (yeast extract and peptone). Liquid culture technique was used to investigate the chloride production and solid media experiment was employed for biodegradation of polyvinylchloride films. <em>Bacillus mojavensis</em> and <em>Bacillus paranthracis</em> showed maximum chloride production of 88.4 % and 87.8 % at pH 7 and 50 °C in the absence of carbon and nitrogen sources. On the other hand, <em>Bacillus megaterium</em> and <em>Bacillus mojavensis</em> showed maximum chloride production (91 % and 91.7 %) at pH 7 and 50 °C in the presence of glucose and yeast extract after 5 days of incubation while all vermibacteria indicated the highest chloride production at pH 9 and 50 °C in the presence of sucrose and yeast extract except <em>Bacillus thuringiensis</em>. Similarly, <em>Bacillus mojavensis, Bacillus paranthracis,</em> and <em>Bacillus thuringiensis</em> showed maximum chloride production in the presence of sucrose and peptone. Scanning electron microscopy was used to check the morphological changes of the PVC film after vermibacteria treatments and results revealed that vermibacteria attached to PVC films and validated the changes in surface topography. Fourier-transform infrared spectroscopy also revealed the changes in functional group intensity on both vermibacteria-treated PVC films compared to the control. It was concluded that plastic biodegradation via vermibacteria could be a potential source not only to eliminate plastic-based environmental issues but also holds the potential to significantly improve human health, reduce pollution, and support sustainable practices for a cleaner and healthier environment.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100571"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177645","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2024.100574
Anisha Yadav , Puja Khare
Bioaerosols contribute up to 28 % of airborne particles and can have harmful effects on both human and plant health, depending on their composition. At agricultural sites, the primary contributors to bioaerosol composition include farm activities, soil, irrigation water, plant emissions, and fertilizers. Scientometric data on bioaerosols shows that most research has focused on indoor air, with limited literature available on bioaerosols and plant emissions in open fields. However, there may be interactions between bioaerosols and biogenic emissions. Plants, particularly those that produce essential oils, emit biogenic volatile organic compounds (BVOCs) known for their antimicrobial properties. These compounds may significantly affect the bioaerosol composition in the surrounding area. This review focuses on the potential interaction between BVOCs from essential oil-bearing crops and the microbial composition of bioaerosols at agricultural sites. Key factors influencing these interactions include the amount and persistency of BVOCs in the air, the composition of bioaerosols, the type of plant, and the environmental conditions. Based on the available literature, the study suggests that BVOCs may play a role in modulating the microbial load in bioaerosols, potentially inhibiting the growth of harmful microorganisms in agricultural environments. Further research is needed to understand how BVOCs affect the atmospheric microbiome and their potential application in controlling airborne pathogens in agriculture.
{"title":"The role of volatile organic compound emissions from aromatic crops in the management of bioaerosols at agricultural sites: An overview","authors":"Anisha Yadav , Puja Khare","doi":"10.1016/j.hazadv.2024.100574","DOIUrl":"10.1016/j.hazadv.2024.100574","url":null,"abstract":"<div><div>Bioaerosols contribute up to 28 % of airborne particles and can have harmful effects on both human and plant health, depending on their composition. At agricultural sites, the primary contributors to bioaerosol composition include farm activities, soil, irrigation water, plant emissions, and fertilizers. Scientometric data on bioaerosols shows that most research has focused on indoor air, with limited literature available on bioaerosols and plant emissions in open fields. However, there may be interactions between bioaerosols and biogenic emissions. Plants, particularly those that produce essential oils, emit biogenic volatile organic compounds (BVOCs) known for their antimicrobial properties. These compounds may significantly affect the bioaerosol composition in the surrounding area. This review focuses on the potential interaction between BVOCs from essential oil-bearing crops and the microbial composition of bioaerosols at agricultural sites. Key factors influencing these interactions include the amount and persistency of BVOCs in the air, the composition of bioaerosols, the type of plant, and the environmental conditions. Based on the available literature, the study suggests that BVOCs may play a role in modulating the microbial load in bioaerosols, potentially inhibiting the growth of harmful microorganisms in agricultural environments. Further research is needed to understand how BVOCs affect the atmospheric microbiome and their potential application in controlling airborne pathogens in agriculture.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100574"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177669","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2024.100547
J. Akansha , Bhaskar Das , N. Rajasekar
The electrokinetic remediation (EKR) is a potential method employed for removal and recovery of heavy metals from soil and various waste materials. However, it demonstrated promising efficacy in laboratory settings, diminished in practical implementations as a result of insufficient comprehension of in-situ conditions. In this study, experimental investigations were conducted to determine the effect of soil particle size on the performance of EKR. Four distinct soil particle sizes were utilized i.e., retained on 1.18 mm (EKR-A), 300 μm (EKR-B), 150 μm (EKR-C), and passing through 150 μm (EKR-D). The alteration in bioavailability as well as physiochemical properties of Chromium (Cr) was investigated through sequential extraction process (SEP) along with soil characterization techniques such as FE-SEM-EDX, XRD, FT-IR. Studies of soil particle size, composition and morphology indicate that as particle size decreases, pollutant concentration increases. Consensus was reached through the research that the treatment efficiency is substantially impacted by the particle size of the soil; in other words, smaller particle sizes led to diminished efficacy. The cumulative Cr removal percentages for EKR-A, EKR-B, EKR-C, and EKR-D were achieved as 27 %, 19 %, 10 %, and 7 %, respectively. The SEP study revealed that the initial soil Cr-concentration was predominated with oxidizable fraction (63–81 %) and the EKR facilitates the extraction of pollutants from the soil matrix by increasing their leachability from 1 % to 30 %, thus providing both removal and recovery of Cr as a feasible option.
{"title":"Electrokinetic remediation of chromium contaminated soil: Impact of particle size on treatment efficiency and bioavailability","authors":"J. Akansha , Bhaskar Das , N. Rajasekar","doi":"10.1016/j.hazadv.2024.100547","DOIUrl":"10.1016/j.hazadv.2024.100547","url":null,"abstract":"<div><div>The electrokinetic remediation (EKR) is a potential method employed for removal and recovery of heavy metals from soil and various waste materials. However, it demonstrated promising efficacy in laboratory settings, diminished in practical implementations as a result of insufficient comprehension of in-situ conditions. In this study, experimental investigations were conducted to determine the effect of soil particle size on the performance of EKR. Four distinct soil particle sizes were utilized i.e., retained on 1.18 mm (EKR-A), 300 μm (EKR-B), 150 μm (EKR-C), and passing through 150 μm (EKR-D). The alteration in bioavailability as well as physiochemical properties of Chromium (Cr) was investigated through sequential extraction process (SEP) along with soil characterization techniques such as FE-SEM-EDX, XRD, FT-IR. Studies of soil particle size, composition and morphology indicate that as particle size decreases, pollutant concentration increases. Consensus was reached through the research that the treatment efficiency is substantially impacted by the particle size of the soil; in other words, smaller particle sizes led to diminished efficacy. The cumulative Cr removal percentages for EKR-A, EKR-B, EKR-C, and EKR-D were achieved as 27 %, 19 %, 10 %, and 7 %, respectively. The SEP study revealed that the initial soil Cr-concentration was predominated with oxidizable fraction (63–81 %) and the EKR facilitates the extraction of pollutants from the soil matrix by increasing their leachability from 1 % to 30 %, thus providing both removal and recovery of Cr as a feasible option.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100547"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176283","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2025.100598
Shahrul Nizam Md. Salleh , Mohamad Zaki Abdullah , Mohamed Shuaib Mohamed Saheed , Mohd Fazli Mohammat
The paper investigated the effectiveness of cellulose acetate (CA) nanofibres doped with a newly synthesized compound against MRSA microbe and HCoV-229E virus. MRSA microbe was responsible for antibiotic resistance diseases and HCoV-229E virus can cause mild to chronic respiratory tract infections. The pyrrolidone compound was synthesized using a one-pot sonochemistry technique and was chemically characterized followed by a toxicological assessment. Subsequently, it was dissolved in a tri-solvent solution containing cellulose acetate and electrospun to create the nanofibre membrane. The resulting membrane underwent characterization and testing against MRSA bacteria and HCoV-229E virus. The findings indicate that the nanofibre membrane, doped with the synthesized pyrrolidone compound, effectively inhibits the growth of MRSA bacteria and HCoV-229E virus.
{"title":"Antimicrobial and antiviral effect of cellulose acetate nanofibres doped with pyrrolidone against methicillin-resistant Staphylococcus aureus (MRSA) and human coronavirus 229E (HCoV-229E)","authors":"Shahrul Nizam Md. Salleh , Mohamad Zaki Abdullah , Mohamed Shuaib Mohamed Saheed , Mohd Fazli Mohammat","doi":"10.1016/j.hazadv.2025.100598","DOIUrl":"10.1016/j.hazadv.2025.100598","url":null,"abstract":"<div><div>The paper investigated the effectiveness of cellulose acetate (CA) nanofibres doped with a newly synthesized compound against MRSA microbe and HCoV-229E virus. MRSA microbe was responsible for antibiotic resistance diseases and HCoV-229E virus can cause mild to chronic respiratory tract infections. The pyrrolidone compound was synthesized using a one-pot sonochemistry technique and was chemically characterized followed by a toxicological assessment. Subsequently, it was dissolved in a tri-solvent solution containing cellulose acetate and electrospun to create the nanofibre membrane. The resulting membrane underwent characterization and testing against MRSA bacteria and HCoV-229E virus. The findings indicate that the nanofibre membrane, doped with the synthesized pyrrolidone compound, effectively inhibits the growth of MRSA bacteria and HCoV-229E virus.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100598"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176348","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2025.100602
Rupanjana Das, Deep Raj
A broad range of artificial or naturally occurring chemicals known as emerging contaminants (ECs) are increasingly found in landfill leachate and provide serious dangers to human health and the environment. This critical analysis investigates the origin, dispersion, and effects of ECs in relation to landfill settings. Landfills serve as EC reservoirs because of the diverse mix of e-waste, industrial compounds, pharmaceuticals, personal care items, and endocrine-disrupting chemicals. Factors including landfill design, waste type, and environmental conditions affect the mobility and permanence of these toxins as they seep into nearby soils, groundwater, and surface water through leachate. ECs have been found in trace amounts in the landfill leachate, and are polar substances having a brief half-life. Concerns over the consequences of newly discovered contaminants on the environment and human health have grown because of their increased detection in the landfill leachate. Additionally, they increase the hazards to human populations by having the ability to pollute agricultural soils and sources of drinking water. The significant finding is that the ECs in landfill leachate can be generated from various sites whether it is from municipal solid wastes, agricultural runoffs, or industrial wastes which become persistent in nature increasing risk to human health and environment. The study identifies important knowledge gaps regarding the development of harmful transformation products, the collective effects of EC combinations, and the inadequacy of traditional treatment techniques in reducing EC pollution. By this it can be concluded that advanced analytical methods, creative leachate treatment approaches, and strong regulatory frameworks are needed to address these issues and successfully stop EC discharge and control its negative effects on the environment and human health. In order to reduce the hazards caused by newly discovered pollutants in landfill leachate and to support environmentally friendly waste management techniques, this analysis emphasizes the necessity of both international and regional initiatives.
{"title":"Sources, distribution, and impacts of emerging contaminants – a critical review on contamination of landfill leachate","authors":"Rupanjana Das, Deep Raj","doi":"10.1016/j.hazadv.2025.100602","DOIUrl":"10.1016/j.hazadv.2025.100602","url":null,"abstract":"<div><div>A broad range of artificial or naturally occurring chemicals known as emerging contaminants (ECs) are increasingly found in landfill leachate and provide serious dangers to human health and the environment. This critical analysis investigates the origin, dispersion, and effects of ECs in relation to landfill settings. Landfills serve as EC reservoirs because of the diverse mix of e-waste, industrial compounds, pharmaceuticals, personal care items, and endocrine-disrupting chemicals. Factors including landfill design, waste type, and environmental conditions affect the mobility and permanence of these toxins as they seep into nearby soils, groundwater, and surface water through leachate. ECs have been found in trace amounts in the landfill leachate, and are polar substances having a brief half-life. Concerns over the consequences of newly discovered contaminants on the environment and human health have grown because of their increased detection in the landfill leachate. Additionally, they increase the hazards to human populations by having the ability to pollute agricultural soils and sources of drinking water. The significant finding is that the ECs in landfill leachate can be generated from various sites whether it is from municipal solid wastes, agricultural runoffs, or industrial wastes which become persistent in nature increasing risk to human health and environment. The study identifies important knowledge gaps regarding the development of harmful transformation products, the collective effects of EC combinations, and the inadequacy of traditional treatment techniques in reducing EC pollution. By this it can be concluded that advanced analytical methods, creative leachate treatment approaches, and strong regulatory frameworks are needed to address these issues and successfully stop EC discharge and control its negative effects on the environment and human health. In order to reduce the hazards caused by newly discovered pollutants in landfill leachate and to support environmentally friendly waste management techniques, this analysis emphasizes the necessity of both international and regional initiatives.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100602"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176350","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2024.100529
Weiwei Wang , Songjun Guo , Bao Li , Dongyu Xu , Bo Gao
Estuaries have received widespread attention as important zones for transporting pollutants from rivers to the ocean. The distribution characteristics and risks of microplastics (MPs) pollution in estuaries require further investigation. This study analyzed the occurrence and risks of MPs in the surface waters of the Pearl River Estuary (PRE) and the Yangtze River Estuary (YRE) using identical analytical methods. MPs were more abundant in the YRE (2.80 × 104 ± 2.30 × 104 particles/m3) than in the PRE (3.10 × 103 ± 9.97 × 102 particles/m3). In the PRE, polypropylene (PP, 31.61 %), polyethylene terephthalate (PET, 13.55 %), and polyethylene (PE, 12.26 %) were the main components, unlike the YRE, which primarily contained PP (57.43 %) and PE (39.31 %). The most common shapes and sizes of MPs in both regions were fragments and small-sized MPs (SMPs, 10–300 μm), respectively. In addition, MP characteristics in each estuary influenced their diversity index differently: MP shapes in the YRE and polymer types in the PRE. Furthermore, MPs in the YRE showed higher fragmentation levels compared to those in the PRE, indicating that the downsizing of SMPs in the YRE might have reached a stable size distribution, as indicated by the conditional fragmentation model (CDF) and carbonyl index of PP and PE. Moreover, similar sources (soil, rainfall, and atmospheric deposition) in the estuary were identified using CDF fingerprinting. Although the risk of MP pollution in the surface water of both estuaries was classified as low, the pollution risk index for PRE (PRIPRE=14.8325) was higher than that for YRE (PRIYRE=6.0450). This difference is due to the varying abundance of highly toxic polymers in the two estuaries. Simultaneous comparative observations of MPs are beneficial for understanding the fate and environmental risks associated with MPs in different estuaries.
{"title":"Microplastics in Pearl River Estuary and Yangtze River Estuary, China: Occurrence, fragmentation and pollution risk","authors":"Weiwei Wang , Songjun Guo , Bao Li , Dongyu Xu , Bo Gao","doi":"10.1016/j.hazadv.2024.100529","DOIUrl":"10.1016/j.hazadv.2024.100529","url":null,"abstract":"<div><div>Estuaries have received widespread attention as important zones for transporting pollutants from rivers to the ocean. The distribution characteristics and risks of microplastics (MPs) pollution in estuaries require further investigation. This study analyzed the occurrence and risks of MPs in the surface waters of the Pearl River Estuary (PRE) and the Yangtze River Estuary (YRE) using identical analytical methods. MPs were more abundant in the YRE (2.80 × 10<sup>4</sup> ± 2.30 × 10<sup>4</sup> particles/m<sup>3</sup>) than in the PRE (3.10 × 10<sup>3</sup> ± 9.97 × 10<sup>2</sup> particles/m<sup>3</sup>). In the PRE, polypropylene (PP, 31.61 %), polyethylene terephthalate (PET, 13.55 %), and polyethylene (PE, 12.26 %) were the main components, unlike the YRE, which primarily contained PP (57.43 %) and PE (39.31 %). The most common shapes and sizes of MPs in both regions were fragments and small-sized MPs (SMPs, 10–300 μm), respectively. In addition, MP characteristics in each estuary influenced their diversity index differently: MP shapes in the YRE and polymer types in the PRE. Furthermore, MPs in the YRE showed higher fragmentation levels compared to those in the PRE, indicating that the downsizing of SMPs in the YRE might have reached a stable size distribution, as indicated by the conditional fragmentation model (CDF) and carbonyl index of PP and PE. Moreover, similar sources (soil, rainfall, and atmospheric deposition) in the estuary were identified using CDF fingerprinting. Although the risk of MP pollution in the surface water of both estuaries was classified as low, the pollution risk index for PRE (PRI<sub>PRE</sub>=14.8325) was higher than that for YRE (PRI<sub>YRE</sub>=6.0450). This difference is due to the varying abundance of highly toxic polymers in the two estuaries. Simultaneous comparative observations of MPs are beneficial for understanding the fate and environmental risks associated with MPs in different estuaries.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100529"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176885","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}
Pub Date : 2025-02-01DOI: 10.1016/j.hazadv.2024.100556
Miguel Valdes , Drew W. Johnson , Jie Huang , Sarah Saslow , Jinhu Song
This research evaluates the effectiveness of epoxy and polyurethane resins used as grouts to mitigate iodide leaching from deep vadose zone sands. The research measured the rate of gas evolution during grout curing, foam expansion, and the effectiveness of each grout in trapping iodide within the sand matrix. Minimal iodide displacement during grouting is desired and the polyurethane grouts displaced <1 % of iodide due to moisture in the samples being consumed by reactions with methylene diphenyl diisocyanate, leaving little excess moisture and associated mobile iodide as the resins cured. Nearly half (45 %) of the iodide was displaced during the injection of epoxy grout when moisture was present. This was attributed to the immiscibility of water containing iodide with epoxy, which was displaced from the monoliths during grouting. Minimal porosities and diffusivities are desired after grouting and all polyurethane grouts had porosity values ranging from 16.59 % to 19.45 % and diffusivities between 1.84×10−8 to 2.30×10−7 cm²/sec. Catalyzed grouts generally showed lower porosity and diffusivity with higher ratios of added catalyst.
{"title":"Chemical grouts to reduce contaminant leaching from deep vadose zone sands","authors":"Miguel Valdes , Drew W. Johnson , Jie Huang , Sarah Saslow , Jinhu Song","doi":"10.1016/j.hazadv.2024.100556","DOIUrl":"10.1016/j.hazadv.2024.100556","url":null,"abstract":"<div><div>This research evaluates the effectiveness of epoxy and polyurethane resins used as grouts to mitigate iodide leaching from deep vadose zone sands. The research measured the rate of gas evolution during grout curing, foam expansion, and the effectiveness of each grout in trapping iodide within the sand matrix. Minimal iodide displacement during grouting is desired and the polyurethane grouts displaced <1 % of iodide due to moisture in the samples being consumed by reactions with methylene diphenyl diisocyanate, leaving little excess moisture and associated mobile iodide as the resins cured. Nearly half (45 %) of the iodide was displaced during the injection of epoxy grout when moisture was present. This was attributed to the immiscibility of water containing iodide with epoxy, which was displaced from the monoliths during grouting. Minimal porosities and diffusivities are desired after grouting and all polyurethane grouts had porosity values ranging from 16.59 % to 19.45 % and diffusivities between 1.84×10<sup>−8</sup> to 2.30×10<sup>−7</sup> cm²/<em>sec</em>. Catalyzed grouts generally showed lower porosity and diffusivity with higher ratios of added catalyst.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100556"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176887","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}