Valentina Ospina, Valentina Cardozo, Jazmín Porras, N. Acelas, Angélica Forgionny
The contamination of wastewater with pharmaceutical compounds represents a growing environmental challenge due to the inefficiency of conventional treatment systems in removing these emerging contaminants. The coffee husk (CH) is a promising bioadsorbent due to its abundant availability as a byproduct of coffee production. This study focuses on using untreated CH as an adsorbent for removing acetaminophen (ACE) and ciprofloxacin (CIP) while exploring the impact of pyrolysis temperature on the adsorption efficiency of these pharmaceutical compounds. The results reveal an excellent CH performance in removing CIP, achieving 64% removal with a maximum adsorption capacity of 37.00 mg/g. Increasing the pyrolysis temperature during the heat treatment of coffee husks significantly affects the adsorption of CIP. This behavior is primarily due to the reduction in functional groups, which are essential for facilitating the adsorption of CIP onto the resulting biochar. Thermodynamic parameters (ΔH° > 0 and ΔG° > 0) indicate that CIP adsorption on CH is an endothermic and not spontaneous process. The removal efficiency of CIP on CH for synthetic wastewater and urine matrices showed that CH can effectively remove CIP from wastewater. Finally, the reuse of CH as a bioadsorbent highlights its potential to contribute to water quality improvement and environmental preservation.
{"title":"Valorization of coffee husks for the sustainable removal of pharmaceuticals from aqueous solutions","authors":"Valentina Ospina, Valentina Cardozo, Jazmín Porras, N. Acelas, Angélica Forgionny","doi":"10.2166/h2oj.2024.102","DOIUrl":"https://doi.org/10.2166/h2oj.2024.102","url":null,"abstract":"\u0000 \u0000 The contamination of wastewater with pharmaceutical compounds represents a growing environmental challenge due to the inefficiency of conventional treatment systems in removing these emerging contaminants. The coffee husk (CH) is a promising bioadsorbent due to its abundant availability as a byproduct of coffee production. This study focuses on using untreated CH as an adsorbent for removing acetaminophen (ACE) and ciprofloxacin (CIP) while exploring the impact of pyrolysis temperature on the adsorption efficiency of these pharmaceutical compounds. The results reveal an excellent CH performance in removing CIP, achieving 64% removal with a maximum adsorption capacity of 37.00 mg/g. Increasing the pyrolysis temperature during the heat treatment of coffee husks significantly affects the adsorption of CIP. This behavior is primarily due to the reduction in functional groups, which are essential for facilitating the adsorption of CIP onto the resulting biochar. Thermodynamic parameters (ΔH° > 0 and ΔG° > 0) indicate that CIP adsorption on CH is an endothermic and not spontaneous process. The removal efficiency of CIP on CH for synthetic wastewater and urine matrices showed that CH can effectively remove CIP from wastewater. Finally, the reuse of CH as a bioadsorbent highlights its potential to contribute to water quality improvement and environmental preservation.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141120272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bhesh Kumar Karki, Sachita Baniya, Hari Lal Kharel, M. Angove, S. Paudel
Rapid urbanization has caused a worldwide increase in the discharge of wastewater effluent. Although Nepal has a noteworthy history of wastewater management, progress in this field has been hindered by persistent issues. These problems encompass insufficient sewer coverage, deficient treatment and sludge disposal facilities, inadequate treatment infrastructure, lack of coherent institutional frameworks, and a lack of comprehensive planning. This review provides a glimpse into Nepal's current urban wastewater landscape while also offering a concise historical overview of its wastewater management trends. The study gathered data, information from government organizations, as well as related research, review articles, and reports from 1999 to 2023. Our findings reveal that more than 85% of urban households in Nepal rely on onsite sanitation, with limited access to septage treatment facilities. The ratio of wastewater treatment to generation is disconcertingly low, further emphasized by the concentration of centralized treatment plants in the capital city. This low ratio underscores the inadequacy of the existing wastewater system and the novice approaches of the government, which contribute to the poor sewerage facilities in Nepal. This study unequivocally highlights the imperative need for functional and institutional hierarchy emphasizing local communities, substantial changes in resource allocation, governance practices, and technical infrastructure.
{"title":"Urban wastewater management in Nepal: generation, treatment, engineering, and policy perspectives","authors":"Bhesh Kumar Karki, Sachita Baniya, Hari Lal Kharel, M. Angove, S. Paudel","doi":"10.2166/h2oj.2024.105","DOIUrl":"https://doi.org/10.2166/h2oj.2024.105","url":null,"abstract":"\u0000 \u0000 Rapid urbanization has caused a worldwide increase in the discharge of wastewater effluent. Although Nepal has a noteworthy history of wastewater management, progress in this field has been hindered by persistent issues. These problems encompass insufficient sewer coverage, deficient treatment and sludge disposal facilities, inadequate treatment infrastructure, lack of coherent institutional frameworks, and a lack of comprehensive planning. This review provides a glimpse into Nepal's current urban wastewater landscape while also offering a concise historical overview of its wastewater management trends. The study gathered data, information from government organizations, as well as related research, review articles, and reports from 1999 to 2023. Our findings reveal that more than 85% of urban households in Nepal rely on onsite sanitation, with limited access to septage treatment facilities. The ratio of wastewater treatment to generation is disconcertingly low, further emphasized by the concentration of centralized treatment plants in the capital city. This low ratio underscores the inadequacy of the existing wastewater system and the novice approaches of the government, which contribute to the poor sewerage facilities in Nepal. This study unequivocally highlights the imperative need for functional and institutional hierarchy emphasizing local communities, substantial changes in resource allocation, governance practices, and technical infrastructure.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140248851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Responding to Nepal's hydropower sector's vulnerability to climate change, this study investigates its impact on energy security, focusing on the Madi River Basin's snow-fed river systems. This study conducted a rigorous analysis of the basin's historical and future hydroclimatic trends, using the linear scaling method to evaluate and correct inherent biases in 13 GCMs, resulting in the selection of 6 BCMs with above-satisfactory performance. Future projections reveal an increase in annual precipitation across all timeframes with a higher increment in SSP585 by the end of the century, and a temperature rise ranging from 1.8 to 3.5 °C from the baseline in the far future under moderate- to high-emission scenarios. These hydroclimatic projections are then forced into the calibrated soil and water assessment tool (SWAT) model with very good performance (both R2 and NSE greater than 0.8). The streamflow projection demonstrates an overall increasing trend, marked by significant flow reduction in early months and pronounced monsoon peaks. The analysis of three distinct hydropower projects reveals unique challenges and opportunities, underscoring the heterogeneous nature of projects and the need for location-specific planning and strategic management. This study provides crucial insights for sustainable development in renewable energy, laying the foundation for future research and policy in similar hydroclimatic settings.
{"title":"Climate change and hydropower resilience in Nepal: an integrated modeling approach in the Madi River Basin","authors":"Pragya Pokharel, R. K. Regmi","doi":"10.2166/h2oj.2024.110","DOIUrl":"https://doi.org/10.2166/h2oj.2024.110","url":null,"abstract":"\u0000 \u0000 Responding to Nepal's hydropower sector's vulnerability to climate change, this study investigates its impact on energy security, focusing on the Madi River Basin's snow-fed river systems. This study conducted a rigorous analysis of the basin's historical and future hydroclimatic trends, using the linear scaling method to evaluate and correct inherent biases in 13 GCMs, resulting in the selection of 6 BCMs with above-satisfactory performance. Future projections reveal an increase in annual precipitation across all timeframes with a higher increment in SSP585 by the end of the century, and a temperature rise ranging from 1.8 to 3.5 °C from the baseline in the far future under moderate- to high-emission scenarios. These hydroclimatic projections are then forced into the calibrated soil and water assessment tool (SWAT) model with very good performance (both R2 and NSE greater than 0.8). The streamflow projection demonstrates an overall increasing trend, marked by significant flow reduction in early months and pronounced monsoon peaks. The analysis of three distinct hydropower projects reveals unique challenges and opportunities, underscoring the heterogeneous nature of projects and the need for location-specific planning and strategic management. This study provides crucial insights for sustainable development in renewable energy, laying the foundation for future research and policy in similar hydroclimatic settings.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140255736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Olga Murujew, K. L. Le Corre, Andrea Wilson, Y. Bajón Fernández, Peter Vale, Bruce Jefferson, M. Pidou
Reactive media present an alternative to gravel in constructed wetlands and have the potential to sustainably and efficiently remove phosphorus from wastewater. In this study, a full-scale steel slag wetland has been operated for its whole lifecycle at which 1.39 mg P/g media were retained. During its lifecycle, this wetland met strict consents below 0.5 mg P/L for the first 6 months and was operated for 266 and 353 days before the effluent phosphorus concentration rose above the typical consents of 1 and 2 mg P/L, respectively. A detailed analysis of the system demonstrated that the performance was directly associated with the release of materials from the media into the water which in turn affected other critical parameters such as pH. Further analysis of the media suggested that greater understanding was needed concerning the role of carbonates and in particular calcite if steel slag is to be effectively managed for use on constructed wetlands. Importantly, controlled release of calcium oxide from the media surface is required by managing the concerns of pH and vanadium release.
{"title":"Reactive media constructed wetland for phosphorus removal: assessing the opportunity and challenges","authors":"Olga Murujew, K. L. Le Corre, Andrea Wilson, Y. Bajón Fernández, Peter Vale, Bruce Jefferson, M. Pidou","doi":"10.2166/h2oj.2024.097","DOIUrl":"https://doi.org/10.2166/h2oj.2024.097","url":null,"abstract":"\u0000 Reactive media present an alternative to gravel in constructed wetlands and have the potential to sustainably and efficiently remove phosphorus from wastewater. In this study, a full-scale steel slag wetland has been operated for its whole lifecycle at which 1.39 mg P/g media were retained. During its lifecycle, this wetland met strict consents below 0.5 mg P/L for the first 6 months and was operated for 266 and 353 days before the effluent phosphorus concentration rose above the typical consents of 1 and 2 mg P/L, respectively. A detailed analysis of the system demonstrated that the performance was directly associated with the release of materials from the media into the water which in turn affected other critical parameters such as pH. Further analysis of the media suggested that greater understanding was needed concerning the role of carbonates and in particular calcite if steel slag is to be effectively managed for use on constructed wetlands. Importantly, controlled release of calcium oxide from the media surface is required by managing the concerns of pH and vanadium release.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mekelle city is one of the Ethiopian cities suitable for urban and peri-urban agriculture for cultivating leafy vegetables using wastewater. The consumption of unprocessed and processed leafy vegetables is also very high in the city. Wastewater samples collected from four experimental sites (ESs) in the district were found to have higher concentrations in 4 (i.e., Cd, Cr, Cu, and Mn) of the 10 heavy metals tested than the permissible limit established by the FAO (2004). Interestingly, spring water samples collected from another district called Kallamino, designated as a comparison site, also have higher concentrations in 4 (i.e., Al, As, Cd, and Cu) of the 10 heavy metals tested. However, the leafy vegetables grown in the least contaminated ES were found to have higher concentrations in 6–7 of the 10 heavy metals tested. The lettuce and spinach had elevated concentrations of As and Al, respectively. The wastewater used to irrigate vegetable farms in the Hadnet district of Mekelle is not safe enough. More importantly, the soils of the farms might have accumulated far more amount of heavy metals. The cultivated lettuce, spinach, and cauliflower are highly contaminated. Thus, the use of wastewater for irrigating urban and peri-urban farms needs to be regulated.
{"title":"Assessment of concentrations of heavy metals in three leafy vegetables irrigated with wastewater in Hadnet district, Mekelle, Ethiopia","authors":"H. Tekle, D. Sbhatu, Gebreselema Gebreyohannes","doi":"10.2166/h2oj.2024.087","DOIUrl":"https://doi.org/10.2166/h2oj.2024.087","url":null,"abstract":"\u0000 Mekelle city is one of the Ethiopian cities suitable for urban and peri-urban agriculture for cultivating leafy vegetables using wastewater. The consumption of unprocessed and processed leafy vegetables is also very high in the city. Wastewater samples collected from four experimental sites (ESs) in the district were found to have higher concentrations in 4 (i.e., Cd, Cr, Cu, and Mn) of the 10 heavy metals tested than the permissible limit established by the FAO (2004). Interestingly, spring water samples collected from another district called Kallamino, designated as a comparison site, also have higher concentrations in 4 (i.e., Al, As, Cd, and Cu) of the 10 heavy metals tested. However, the leafy vegetables grown in the least contaminated ES were found to have higher concentrations in 6–7 of the 10 heavy metals tested. The lettuce and spinach had elevated concentrations of As and Al, respectively. The wastewater used to irrigate vegetable farms in the Hadnet district of Mekelle is not safe enough. More importantly, the soils of the farms might have accumulated far more amount of heavy metals. The cultivated lettuce, spinach, and cauliflower are highly contaminated. Thus, the use of wastewater for irrigating urban and peri-urban farms needs to be regulated.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140255688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qurban Ali, Rida Zainab, M. Badshah, Warda Sarwar, Samiullah Khan, Ghulam Mustafa, Tanveer Ibrahim, Safia Ahmed
Ciprofloxacin (CIP), an emerging micro-pollutant antibiotic, poses an environmental threat due to its resistance to high-temperature decomposition, aiding antibiotic resistance spread. Conventional degradation generates toxic byproducts, while biodegradation offers an efficient and eco-friendly means to eliminate CIP. In this study, ciprofloxacin-degrading strains were isolated from pharmaceutical wastewater using an enrichment technique. Isolated strains R2 and R4 were identified as Stutzerimonas stutzeri and Exiguobacterium indicum, respectively, based on their 16S rRNA gene sequence. Ciprofloxacin degrading potential of these strains was tested in shake flask fermentation and quantified using spectrophotometric assays and ultra-high-performance liquid chromatography (UHPLC). UHPLC analysis revealed that in co-metabolism, R2 achieved 51 and 77% degradation, and R4 achieved 60 and 68% after 5 and 10 days of incubation. When CIP served as the only carbon source, R2 degraded it by 23 and 35%, while R4 degrade it by 19% and 28 in 5 and 10 days, respectively. Spectrophotometric analyses produced congruent results with UHPLC. Notably, in co-metabolism, R2 and R4 achieved 66 and 88% degradation within the 5 days. Moreover, the degraded residues displayed reduced antimicrobial activity against Escherichia coli and Staphylococcus aureus. In conclusion, both strains show potential for degrading CIP, aiding in mitigating pharmaceuticals and environmental pollutants.
{"title":"Prospecting the biodegradation of ciprofloxacin by Stutzerimonas stutzeri R2 and Exiguobacterium indicum strain R4 isolated from pharmaceutical wastewater","authors":"Qurban Ali, Rida Zainab, M. Badshah, Warda Sarwar, Samiullah Khan, Ghulam Mustafa, Tanveer Ibrahim, Safia Ahmed","doi":"10.2166/h2oj.2024.103","DOIUrl":"https://doi.org/10.2166/h2oj.2024.103","url":null,"abstract":"\u0000 \u0000 Ciprofloxacin (CIP), an emerging micro-pollutant antibiotic, poses an environmental threat due to its resistance to high-temperature decomposition, aiding antibiotic resistance spread. Conventional degradation generates toxic byproducts, while biodegradation offers an efficient and eco-friendly means to eliminate CIP. In this study, ciprofloxacin-degrading strains were isolated from pharmaceutical wastewater using an enrichment technique. Isolated strains R2 and R4 were identified as Stutzerimonas stutzeri and Exiguobacterium indicum, respectively, based on their 16S rRNA gene sequence. Ciprofloxacin degrading potential of these strains was tested in shake flask fermentation and quantified using spectrophotometric assays and ultra-high-performance liquid chromatography (UHPLC). UHPLC analysis revealed that in co-metabolism, R2 achieved 51 and 77% degradation, and R4 achieved 60 and 68% after 5 and 10 days of incubation. When CIP served as the only carbon source, R2 degraded it by 23 and 35%, while R4 degrade it by 19% and 28 in 5 and 10 days, respectively. Spectrophotometric analyses produced congruent results with UHPLC. Notably, in co-metabolism, R2 and R4 achieved 66 and 88% degradation within the 5 days. Moreover, the degraded residues displayed reduced antimicrobial activity against Escherichia coli and Staphylococcus aureus. In conclusion, both strains show potential for degrading CIP, aiding in mitigating pharmaceuticals and environmental pollutants.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140434067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study attempted to assess the water quality around the tannery effluent discharge areas for suitability for irrigation purposes using different indices (Water Quality Index (WQI)) and statistical analysis in Savar Upazilas in Dhaka, Bangladesh. The samples were collected three times, from monsoon 2021 to pre-monsoon 2023. The analysis results showed that the concentrations of various parameters at most of the sampling points exceeded the surface water standard. Pollution levels were found in the following order: pre-monsoon, post-monsoon, and monsoon. At SW1 point, the CWQI, WWQI, and MWQI of the surface water quality showed a ‘poor’ category. The IWQI values showed that the surface water at all the sampling points was suitable for irrigation purposes, except for the SW1 sampling point. The NPI indicates that EC, BOD, COD, TSS, Cl−, Na+, and NO3--N parameters were potentially responsible for polluting most sampling sites. Multivariate statistical analyses like principal component analysis, cluster analysis, and Pearson correlation matrix showed significant anthropogenic intrusions of these variables in surface water in the area. A strong correlation between these parameters indicated their common origin, i.e., poorly treated tannery industry effluent entered the surface water, suggesting an improvement in the efficiency of the Central Effluent Treatment Plant (CETP).
{"title":"Assessment of surface water quality using the Water Quality Index (WQI) and multivariate statistical analysis (MSA), around tannery industry effluent discharge areas","authors":"U. Monira, G. Sattar, M. Mostafa","doi":"10.2166/h2oj.2024.099","DOIUrl":"https://doi.org/10.2166/h2oj.2024.099","url":null,"abstract":"\u0000 \u0000 The study attempted to assess the water quality around the tannery effluent discharge areas for suitability for irrigation purposes using different indices (Water Quality Index (WQI)) and statistical analysis in Savar Upazilas in Dhaka, Bangladesh. The samples were collected three times, from monsoon 2021 to pre-monsoon 2023. The analysis results showed that the concentrations of various parameters at most of the sampling points exceeded the surface water standard. Pollution levels were found in the following order: pre-monsoon, post-monsoon, and monsoon. At SW1 point, the CWQI, WWQI, and MWQI of the surface water quality showed a ‘poor’ category. The IWQI values showed that the surface water at all the sampling points was suitable for irrigation purposes, except for the SW1 sampling point. The NPI indicates that EC, BOD, COD, TSS, Cl−, Na+, and NO3--N parameters were potentially responsible for polluting most sampling sites. Multivariate statistical analyses like principal component analysis, cluster analysis, and Pearson correlation matrix showed significant anthropogenic intrusions of these variables in surface water in the area. A strong correlation between these parameters indicated their common origin, i.e., poorly treated tannery industry effluent entered the surface water, suggesting an improvement in the efficiency of the Central Effluent Treatment Plant (CETP).","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139808554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study attempted to assess the water quality around the tannery effluent discharge areas for suitability for irrigation purposes using different indices (Water Quality Index (WQI)) and statistical analysis in Savar Upazilas in Dhaka, Bangladesh. The samples were collected three times, from monsoon 2021 to pre-monsoon 2023. The analysis results showed that the concentrations of various parameters at most of the sampling points exceeded the surface water standard. Pollution levels were found in the following order: pre-monsoon, post-monsoon, and monsoon. At SW1 point, the CWQI, WWQI, and MWQI of the surface water quality showed a ‘poor’ category. The IWQI values showed that the surface water at all the sampling points was suitable for irrigation purposes, except for the SW1 sampling point. The NPI indicates that EC, BOD, COD, TSS, Cl−, Na+, and NO3--N parameters were potentially responsible for polluting most sampling sites. Multivariate statistical analyses like principal component analysis, cluster analysis, and Pearson correlation matrix showed significant anthropogenic intrusions of these variables in surface water in the area. A strong correlation between these parameters indicated their common origin, i.e., poorly treated tannery industry effluent entered the surface water, suggesting an improvement in the efficiency of the Central Effluent Treatment Plant (CETP).
{"title":"Assessment of surface water quality using the Water Quality Index (WQI) and multivariate statistical analysis (MSA), around tannery industry effluent discharge areas","authors":"U. Monira, G. Sattar, M. Mostafa","doi":"10.2166/h2oj.2024.099","DOIUrl":"https://doi.org/10.2166/h2oj.2024.099","url":null,"abstract":"\u0000 \u0000 The study attempted to assess the water quality around the tannery effluent discharge areas for suitability for irrigation purposes using different indices (Water Quality Index (WQI)) and statistical analysis in Savar Upazilas in Dhaka, Bangladesh. The samples were collected three times, from monsoon 2021 to pre-monsoon 2023. The analysis results showed that the concentrations of various parameters at most of the sampling points exceeded the surface water standard. Pollution levels were found in the following order: pre-monsoon, post-monsoon, and monsoon. At SW1 point, the CWQI, WWQI, and MWQI of the surface water quality showed a ‘poor’ category. The IWQI values showed that the surface water at all the sampling points was suitable for irrigation purposes, except for the SW1 sampling point. The NPI indicates that EC, BOD, COD, TSS, Cl−, Na+, and NO3--N parameters were potentially responsible for polluting most sampling sites. Multivariate statistical analyses like principal component analysis, cluster analysis, and Pearson correlation matrix showed significant anthropogenic intrusions of these variables in surface water in the area. A strong correlation between these parameters indicated their common origin, i.e., poorly treated tannery industry effluent entered the surface water, suggesting an improvement in the efficiency of the Central Effluent Treatment Plant (CETP).","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139868483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Soil loss due to surface runoff is a natural phenomenon accelerated by anthropogenic activities. The study attempted to evaluate soil loss, sediment export, and deposition as influenced by changes in land use and land cover (LULC) in the Bontanga watershed. The InVEST-SDR model integrated with RUSLE was used in soil loss assessment. Results revealed that agricultural land produced 11,365.39 tons/year of soil loss in 1997, followed by 17,476.85 tons/year in 2002. In 2013, agricultural land experienced a soil loss of 5,391.98 tons/year, which finally increased to 91,274.53 tons/year in 2022. Agricultural land exported 56.16% of sediment, 13.39% of dense forest, and 13.30% of grassland. Dense forest deposited 41.54% of the sediment load, 30.49% of mixed shrub and grassland, and 10.85% of grassland. Over a long period, agricultural land is anticipated to contribute soil loss of 2,347,414.04 tons/year and sediment export of 388,497.56 tons/year. Sediment deposition amounting to 1,048,258.78 tons/year is anticipated to be deposited within the agricultural field. Both MAE and MAPE statistical measurements indicate a good model prediction performance for soil loss and sediment export. Understanding where sediments are produced and delivered will guide decision-makers, land use planners, and watershed managers in monitoring and planning the Bontanga watershed.
{"title":"Influence of long-term land use and land cover (LULC) changes on soil loss, sediment export, and deposition in the ungauged Bontanga watershed","authors":"E. Mwanga, Abdul-Ganiyu Shaibu, Zakaria Issaka","doi":"10.2166/h2oj.2024.088","DOIUrl":"https://doi.org/10.2166/h2oj.2024.088","url":null,"abstract":"\u0000 \u0000 Soil loss due to surface runoff is a natural phenomenon accelerated by anthropogenic activities. The study attempted to evaluate soil loss, sediment export, and deposition as influenced by changes in land use and land cover (LULC) in the Bontanga watershed. The InVEST-SDR model integrated with RUSLE was used in soil loss assessment. Results revealed that agricultural land produced 11,365.39 tons/year of soil loss in 1997, followed by 17,476.85 tons/year in 2002. In 2013, agricultural land experienced a soil loss of 5,391.98 tons/year, which finally increased to 91,274.53 tons/year in 2022. Agricultural land exported 56.16% of sediment, 13.39% of dense forest, and 13.30% of grassland. Dense forest deposited 41.54% of the sediment load, 30.49% of mixed shrub and grassland, and 10.85% of grassland. Over a long period, agricultural land is anticipated to contribute soil loss of 2,347,414.04 tons/year and sediment export of 388,497.56 tons/year. Sediment deposition amounting to 1,048,258.78 tons/year is anticipated to be deposited within the agricultural field. Both MAE and MAPE statistical measurements indicate a good model prediction performance for soil loss and sediment export. Understanding where sediments are produced and delivered will guide decision-makers, land use planners, and watershed managers in monitoring and planning the Bontanga watershed.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140481976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nisreen Jawad Rasheed, Mahmoud S. Al-Khafaji, I. Alwan
The Makhool Dam has brought much attention to the Mosul-Makhool Basin (MMB) in Iraq. Dam construction needs comprehensive studies on the impact of climate change on streamflow and sediment yield in watersheds that supply dams; however, there have been no such investigations conducted on the MMB. An ensemble of three Global Circulation Models from Coupled Model Intercomparison Project Phase 6 (CMIP6) with two Shared Socioeconomic Pathways scenarios (SSP2–4.5 and SSP5–8.5) was used to predict the impact of climate change. A distribution mapping downscaling method was utilized to improve the biased climate data. The results indicate that precipitation decreased by 9.5 and 18.7% under SSP2–4.5 and SSP5–8.5 scenarios at the end of the 21st century. The average maximum and minimum temperatures are projected to rise by 2.4 and 1.8 °C in SSP2–4.5 and rise by 3.5 and 2.8 °C in SSP5–8.5 during the study period. The streamflow is expected to decrease by 36.6 and 45.9%, and sediment yield will reduce by 46 and 55% within the same scenarios. Understanding the consequences of climate change helps to face abrupt climate changes to manage dam construction and treat water resources successfully. The results of this research are expected to contribute to improving water management strategies in the study region.
{"title":"Variations of streamflow and sediment yield in the Mosul-Makhool Basin, North of Iraq under climate change: a pre-dam construction study","authors":"Nisreen Jawad Rasheed, Mahmoud S. Al-Khafaji, I. Alwan","doi":"10.2166/h2oj.2023.078","DOIUrl":"https://doi.org/10.2166/h2oj.2023.078","url":null,"abstract":"The Makhool Dam has brought much attention to the Mosul-Makhool Basin (MMB) in Iraq. Dam construction needs comprehensive studies on the impact of climate change on streamflow and sediment yield in watersheds that supply dams; however, there have been no such investigations conducted on the MMB. An ensemble of three Global Circulation Models from Coupled Model Intercomparison Project Phase 6 (CMIP6) with two Shared Socioeconomic Pathways scenarios (SSP2–4.5 and SSP5–8.5) was used to predict the impact of climate change. A distribution mapping downscaling method was utilized to improve the biased climate data. The results indicate that precipitation decreased by 9.5 and 18.7% under SSP2–4.5 and SSP5–8.5 scenarios at the end of the 21st century. The average maximum and minimum temperatures are projected to rise by 2.4 and 1.8 °C in SSP2–4.5 and rise by 3.5 and 2.8 °C in SSP5–8.5 during the study period. The streamflow is expected to decrease by 36.6 and 45.9%, and sediment yield will reduce by 46 and 55% within the same scenarios. Understanding the consequences of climate change helps to face abrupt climate changes to manage dam construction and treat water resources successfully. The results of this research are expected to contribute to improving water management strategies in the study region.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139150025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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