Ali Sbai, Said Kounbach, Ely Cheikh S. Id, Chamekh M’Bareck
The present work is dedicated to the characterization of Moroccan cactus juice, which shows encouraging performance in wastewater treatment. Various techniques were used to highlight the chemical and physical properties of this natural product. Elemental analysis of cactus juice using inductively coupled plasma emission spectroscopy revealed the presence of numerous minerals. Fourier Transform Infrared, ultraviolet, and nuclear magnetic spectroscopies demonstrate the presence of many carbohydrate components. Identification of volatile compounds by gas chromatography reveals the presence of Gibb-3-ene-1,10-dicarboxylic acid, ethyl gallate, 3TMS derivative, ethyl ester and 1-(2-Isopropyl-phenyl)-3,6,6-trimethyl-1,5,6,7-tetrahydro–indazol. Thermogravimetric analysis indicates three peaks at 100, 200 and 600 °C, corresponding to the mass loss of water, polysaccharides, and organic matter, respectively. The rheological characterization of cactus juice suggests that this liquid exhibits shear-thinning behavior, which is governed by the Casson model. The results of the Zeta potential measurement demonstrate the anionic character of cactus juice as a flocculant, with −25 mV as a value of zeta potential. Its use as a flocculant in organic matter removal shows that the chemical Oxygen demand decreases significantly with the increase of the added cactus juice dose, confirming, therefore, its flocculating behavior.
{"title":"Characterization of Moroccan cactus juice toward its use as a green flocculant in wastewater treatment","authors":"Ali Sbai, Said Kounbach, Ely Cheikh S. Id, Chamekh M’Bareck","doi":"10.2166/h2oj.2024.011","DOIUrl":"https://doi.org/10.2166/h2oj.2024.011","url":null,"abstract":"\u0000 \u0000 The present work is dedicated to the characterization of Moroccan cactus juice, which shows encouraging performance in wastewater treatment. Various techniques were used to highlight the chemical and physical properties of this natural product. Elemental analysis of cactus juice using inductively coupled plasma emission spectroscopy revealed the presence of numerous minerals. Fourier Transform Infrared, ultraviolet, and nuclear magnetic spectroscopies demonstrate the presence of many carbohydrate components. Identification of volatile compounds by gas chromatography reveals the presence of Gibb-3-ene-1,10-dicarboxylic acid, ethyl gallate, 3TMS derivative, ethyl ester and 1-(2-Isopropyl-phenyl)-3,6,6-trimethyl-1,5,6,7-tetrahydro–indazol. Thermogravimetric analysis indicates three peaks at 100, 200 and 600 °C, corresponding to the mass loss of water, polysaccharides, and organic matter, respectively. The rheological characterization of cactus juice suggests that this liquid exhibits shear-thinning behavior, which is governed by the Casson model. The results of the Zeta potential measurement demonstrate the anionic character of cactus juice as a flocculant, with −25 mV as a value of zeta potential. Its use as a flocculant in organic matter removal shows that the chemical Oxygen demand decreases significantly with the increase of the added cactus juice dose, confirming, therefore, its flocculating behavior.","PeriodicalId":504893,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141667941","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}
Groundwater is one of the most important contributors to fresh water for humankind in the world. The knowledge of groundwater distribution can play a significant role in the planning and implementation of groundwater management strategies. The major aim of this study was to assess the groundwater potential zone using geographic information system (GIS)-based multicriteria decision analysis in the Enemor and Ener Woreda, Ethiopia. The factors considered in this study are rainfall, geology, slope, drainage density, land use/land cover (LULC), lineament density, and soil type. As a result of the analytic hierarchy process (AHP), it was determined that rainfall and geology are the most influencing factors based on their scoring higher weights. The groundwater potential zone of the study area was categorized into five classes, namely, very low, low, moderate, high, and very high. On analysis, most portions of the study area are found to be under the moderate situation, which covers around 540.23 km2 (65.6%) of the study area, whereas very low, low, high, and very high potentiality classes cover 0.002, 10.99, 21.93, and 0.55% of the area, respectively. Approximately 92% of the observed boreholes agreed with the developed map. Finally, the output of this study is important to regional as well as local policymakers for the exploitation of groundwater or management purposes.
{"title":"Assessment of groundwater potential zones using GIS-based multicriteria decision analysis: a case study on Enemor and Ener Woreda, Central Ethiopia Region","authors":"Alene Moshe, Manamno Beza","doi":"10.2166/h2oj.2024.020","DOIUrl":"https://doi.org/10.2166/h2oj.2024.020","url":null,"abstract":"\u0000 \u0000 Groundwater is one of the most important contributors to fresh water for humankind in the world. The knowledge of groundwater distribution can play a significant role in the planning and implementation of groundwater management strategies. The major aim of this study was to assess the groundwater potential zone using geographic information system (GIS)-based multicriteria decision analysis in the Enemor and Ener Woreda, Ethiopia. The factors considered in this study are rainfall, geology, slope, drainage density, land use/land cover (LULC), lineament density, and soil type. As a result of the analytic hierarchy process (AHP), it was determined that rainfall and geology are the most influencing factors based on their scoring higher weights. The groundwater potential zone of the study area was categorized into five classes, namely, very low, low, moderate, high, and very high. On analysis, most portions of the study area are found to be under the moderate situation, which covers around 540.23 km2 (65.6%) of the study area, whereas very low, low, high, and very high potentiality classes cover 0.002, 10.99, 21.93, and 0.55% of the area, respectively. Approximately 92% of the observed boreholes agreed with the developed map. Finally, the output of this study is important to regional as well as local policymakers for the exploitation of groundwater or management purposes.","PeriodicalId":504893,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140962712","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 growth of cities significantly alters natural catchments by increasing impervious surfaces and necessitating the installation of an appropriate drainage system. Arba Minch is one of the rapidly expanding and facing street flooding. The objective of this study is to assess the hydraulic adequacy of runoff disposal in urban watersheds located in rapidly expanding towns. Stormwater Management Model (SWMM) was used to perform rainfall-runoff simulation. Personal Computer SWMM (PCSWMM) was used to carry out calibration and validation in the watershed. The primary and secondary data were used. Five Land Use/Land Cover (LULC) categories identified were asphalt, coble, vegetation, bare soil, and roof. The result shows 33.49% area is covered with highly impervious land cover. The overall calibration and validation are a very good fit with the observed flow. The total runoff volume of 9494.15 km3 was generated from the town area which is 13.7 km2. The peak runoff determined from 373 sub-catchments varies from 0.01 to 4.48 m3s−1. According to the simulated result, 7.46% of existing drainage channels were flooded. Anticipating future runoff generation, this study evaluates the inadequacy of existing drainage channels in urban areas. Hydraulic analysis is recommended before constructing drainage structures to protect flooding effect.
{"title":"Evaluation of hydraulic adequacy of runoff disposal in urban watersheds of rapidly expanding town","authors":"Chansler Dagnachew Adinew, Adane Abebe Awass, Kedir Mohammed Bushira, Tigistu Yisihak Ukumo, Muluneh Legesse Edamo","doi":"10.2166/h2oj.2024.095","DOIUrl":"https://doi.org/10.2166/h2oj.2024.095","url":null,"abstract":"\u0000 \u0000 The growth of cities significantly alters natural catchments by increasing impervious surfaces and necessitating the installation of an appropriate drainage system. Arba Minch is one of the rapidly expanding and facing street flooding. The objective of this study is to assess the hydraulic adequacy of runoff disposal in urban watersheds located in rapidly expanding towns. Stormwater Management Model (SWMM) was used to perform rainfall-runoff simulation. Personal Computer SWMM (PCSWMM) was used to carry out calibration and validation in the watershed. The primary and secondary data were used. Five Land Use/Land Cover (LULC) categories identified were asphalt, coble, vegetation, bare soil, and roof. The result shows 33.49% area is covered with highly impervious land cover. The overall calibration and validation are a very good fit with the observed flow. The total runoff volume of 9494.15 km3 was generated from the town area which is 13.7 km2. The peak runoff determined from 373 sub-catchments varies from 0.01 to 4.48 m3s−1. According to the simulated result, 7.46% of existing drainage channels were flooded. Anticipating future runoff generation, this study evaluates the inadequacy of existing drainage channels in urban areas. Hydraulic analysis is recommended before constructing drainage structures to protect flooding effect.","PeriodicalId":504893,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140690886","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}
Polly L. Grundy, Peter R. Jarvis, Bruce Jefferson, John Fawell, John A. Haley, E. Goslan
Haloacetic acids (HAAs) are potentially toxic by-products formed from interactions of organic matter and chlorine during disinfection of drinking water, with brominated HAAs forming when bromide is present. Some countries require monitoring of drinking water for five HAAs, but there is an increasing health concern related to the more toxic brominated HAAs and monitoring of nine HAAs (HAA9) is becoming more widespread. However, existing methods of analysis for HAA9 are often sub-optimal, involving complex derivatisation steps and/or long analytical run times. This article presents an improved methodology utilising reverse-phase LC-MS/MS for which sample preparation involves only simple pH adjustment and the analytical run takes 10 min. The efficacy of the method has been demonstrated by a full validation across four drinking water matrices with good sensitivity (<0.8 μg/L), precision (<7%), and bias (<10%) observed for HAA9. A direct comparison using real tap water samples was performed against the widely used existing gas chromatography electron capture the detection method. The new LC-MS/MS method was significantly quicker and easier and demonstrated improved performance in terms of accuracy and precision. This has implications for understanding the risk posed by HAAs in chlorinated water by eliminating the possible historical underestimates of the levels of the more toxic brominated compounds.
{"title":"A validated reverse-phase LC-MS/MS method for the analysis of haloacetic acids in drinking water: supporting the transition from HAA5 to HAA9","authors":"Polly L. Grundy, Peter R. Jarvis, Bruce Jefferson, John Fawell, John A. Haley, E. Goslan","doi":"10.2166/h2oj.2024.008","DOIUrl":"https://doi.org/10.2166/h2oj.2024.008","url":null,"abstract":"\u0000 \u0000 Haloacetic acids (HAAs) are potentially toxic by-products formed from interactions of organic matter and chlorine during disinfection of drinking water, with brominated HAAs forming when bromide is present. Some countries require monitoring of drinking water for five HAAs, but there is an increasing health concern related to the more toxic brominated HAAs and monitoring of nine HAAs (HAA9) is becoming more widespread. However, existing methods of analysis for HAA9 are often sub-optimal, involving complex derivatisation steps and/or long analytical run times. This article presents an improved methodology utilising reverse-phase LC-MS/MS for which sample preparation involves only simple pH adjustment and the analytical run takes 10 min. The efficacy of the method has been demonstrated by a full validation across four drinking water matrices with good sensitivity (<0.8 μg/L), precision (<7%), and bias (<10%) observed for HAA9. A direct comparison using real tap water samples was performed against the widely used existing gas chromatography electron capture the detection method. The new LC-MS/MS method was significantly quicker and easier and demonstrated improved performance in terms of accuracy and precision. This has implications for understanding the risk posed by HAAs in chlorinated water by eliminating the possible historical underestimates of the levels of the more toxic brominated compounds.","PeriodicalId":504893,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698356","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}
Science-policy interaction is vital for addressing hydro-climatic disasters in data-limited regions, with modeling and analysis as key components. The utilization of the soil and water assessment tool (SWAT) model facilitated an evaluation of water balance variations across time and space within Narayani Basin through multi-site calibration. The adjustment of all parameters via the SUFI-2 algorithm revealed that PLAPS and TLAPS exhibit higher sensitivity in scenarios where observed stations fail to capture orographic effects. The calibrated model accurately replicated evapotranspiration, net water yield, and groundwater flow for each sub-basin, including average flow and flow duration curve at calibration points. Findings indicated that 22% of precipitation is lost to evaporation, while 75% contributes to basin runoff, showcasing significant spatial and temporal variability in water balance components. Notably, net water yield comprises 44% lateral flow, 38% surface flow, and 16% groundwater flow, with distinct spatial patterns favoring lateral flow in the Himalayas and groundwater flow in the plains due to topographical variations. These outcomes offer actionable insights for policymakers and water resource managers, enabling assessments of climate and land use impacts and facilitating the formulation of policies for sustainable water resource utilization.
{"title":"Multi-site calibration of the SWAT hydrological model and study of spatio-temporal variation of water balance components in the Narayani River Basin, central part of Nepal","authors":"Nirajan Devkota, Suraj Lamichhane, Pawan Kumar Bhattarai","doi":"10.2166/h2oj.2024.084","DOIUrl":"https://doi.org/10.2166/h2oj.2024.084","url":null,"abstract":"\u0000 \u0000 Science-policy interaction is vital for addressing hydro-climatic disasters in data-limited regions, with modeling and analysis as key components. The utilization of the soil and water assessment tool (SWAT) model facilitated an evaluation of water balance variations across time and space within Narayani Basin through multi-site calibration. The adjustment of all parameters via the SUFI-2 algorithm revealed that PLAPS and TLAPS exhibit higher sensitivity in scenarios where observed stations fail to capture orographic effects. The calibrated model accurately replicated evapotranspiration, net water yield, and groundwater flow for each sub-basin, including average flow and flow duration curve at calibration points. Findings indicated that 22% of precipitation is lost to evaporation, while 75% contributes to basin runoff, showcasing significant spatial and temporal variability in water balance components. Notably, net water yield comprises 44% lateral flow, 38% surface flow, and 16% groundwater flow, with distinct spatial patterns favoring lateral flow in the Himalayas and groundwater flow in the plains due to topographical variations. These outcomes offer actionable insights for policymakers and water resource managers, enabling assessments of climate and land use impacts and facilitating the formulation of policies for sustainable water resource utilization.","PeriodicalId":504893,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139686268","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}
Abdullah Nur Uddin, Tanvir Ahmed Chowdhury, Atiqur Rahman, Arifur Rahman Fahim, Anisur Rahman, Imam Hossain Imon, Md. Anwar Hossen, Hasan Mahmud
The research aims to find out the reusability of jute stick charcoal (JSC) to remove Remazol Red (RR) from textile effluents. The JSC was characterized by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, and Fourier-transform infrared (FTIR) spectroscopy to analyze the morphology, functional groups, and chemical composition, respectively. The batch adsorption method was applied in this study, and it disclosed that dye uptake depends on various factors, namely, pH, contact time, adsorbent dose, and dye concentration. Notably, 93.12% of the dye was removed with the best removal efficiency at a pH of 1, an adsorbent dose of 0.6 g, and an equilibrium time of 120 min, where the adsorption occurred rapidly in the first 20 min. The Langmuir isotherm model successfully defined the adsorption phenomena, yielding an R2 value of 0.995. The kinetic experimental data followed the pseudo-second-order model (R2 = 0.999). The optimum adsorption parameters were implemented for the effluent obtained from a dye bath where a fabric sample (5 g) was dyed with RR, and 62.4% dye was removed. For the scaled application of JSC to a wastewater stream, the raw textile effluent was also treated, which resulted in 52.6% of dye removal. These results show that JSC is a promising adsorbent for treating textile wastewater.
{"title":"Adsorptive removal of Remazol Red (RR) from textile effluents using jute stick charcoal (JSC)","authors":"Abdullah Nur Uddin, Tanvir Ahmed Chowdhury, Atiqur Rahman, Arifur Rahman Fahim, Anisur Rahman, Imam Hossain Imon, Md. Anwar Hossen, Hasan Mahmud","doi":"10.2166/h2oj.2024.094","DOIUrl":"https://doi.org/10.2166/h2oj.2024.094","url":null,"abstract":"\u0000 \u0000 The research aims to find out the reusability of jute stick charcoal (JSC) to remove Remazol Red (RR) from textile effluents. The JSC was characterized by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, and Fourier-transform infrared (FTIR) spectroscopy to analyze the morphology, functional groups, and chemical composition, respectively. The batch adsorption method was applied in this study, and it disclosed that dye uptake depends on various factors, namely, pH, contact time, adsorbent dose, and dye concentration. Notably, 93.12% of the dye was removed with the best removal efficiency at a pH of 1, an adsorbent dose of 0.6 g, and an equilibrium time of 120 min, where the adsorption occurred rapidly in the first 20 min. The Langmuir isotherm model successfully defined the adsorption phenomena, yielding an R2 value of 0.995. The kinetic experimental data followed the pseudo-second-order model (R2 = 0.999). The optimum adsorption parameters were implemented for the effluent obtained from a dye bath where a fabric sample (5 g) was dyed with RR, and 62.4% dye was removed. For the scaled application of JSC to a wastewater stream, the raw textile effluent was also treated, which resulted in 52.6% of dye removal. These results show that JSC is a promising adsorbent for treating textile wastewater.","PeriodicalId":504893,"journal":{"name":"H2Open Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139612611","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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