Yasuhiro Asada, Shunichi Hayasaka, T. Miyoshi, Marina Tokuyasu, M. Akiba
Natural organic matter contained in natural water inhibits the adsorptive removal of 2-methylisoborneol (2-MIB) by powdered activated carbon (PAC). We investigated the relationship between water-quality indices and the adsorptive removal of 2-MIB by PAC. We collected three different raw water (i.e., two lake water and one river water) samples twice per month for 10 months. We characterized the raw water using total organic carbon concentration, ultraviolet absorption at 254 nm, electrical conductivity, and excitation–emission matrix analysis. The results were compared with 2-MIB removal rates evaluated from PAC adsorption experiments and revealed that there was no universal indicator that could explain the trends of the 2-MIB removal rate during the overall experimental period. The correlation trends between 2-MIB removal rates and water-quality indices differed significantly between the high and low water-temperature periods. Several water-quality indices related to the organic matter associated with biological processes, especially algal activities (i.e., soluble microbial products, chlorophylls, and phycocyanin), exhibited strong correlations with the 2-MIB removal rates (|R| > 0.7) under certain conditions (e.g., high lake-water temperature). Both the parallel factor (PARAFAC) analysis and fluorescence regional integration (FRI) method could evaluate such behaviors after including the regions associated with algal organic matter in the calculation.
{"title":"Effects of raw water quality on the adsorptive removal of 2-methylisoborneol by powdered activated carbon under non-equilibrium conditions","authors":"Yasuhiro Asada, Shunichi Hayasaka, T. Miyoshi, Marina Tokuyasu, M. Akiba","doi":"10.2166/aqua.2023.077","DOIUrl":"https://doi.org/10.2166/aqua.2023.077","url":null,"abstract":"\u0000 \u0000 Natural organic matter contained in natural water inhibits the adsorptive removal of 2-methylisoborneol (2-MIB) by powdered activated carbon (PAC). We investigated the relationship between water-quality indices and the adsorptive removal of 2-MIB by PAC. We collected three different raw water (i.e., two lake water and one river water) samples twice per month for 10 months. We characterized the raw water using total organic carbon concentration, ultraviolet absorption at 254 nm, electrical conductivity, and excitation–emission matrix analysis. The results were compared with 2-MIB removal rates evaluated from PAC adsorption experiments and revealed that there was no universal indicator that could explain the trends of the 2-MIB removal rate during the overall experimental period. The correlation trends between 2-MIB removal rates and water-quality indices differed significantly between the high and low water-temperature periods. Several water-quality indices related to the organic matter associated with biological processes, especially algal activities (i.e., soluble microbial products, chlorophylls, and phycocyanin), exhibited strong correlations with the 2-MIB removal rates (|R| > 0.7) under certain conditions (e.g., high lake-water temperature). Both the parallel factor (PARAFAC) analysis and fluorescence regional integration (FRI) method could evaluate such behaviors after including the regions associated with algal organic matter in the calculation.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78910526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. S. Rahim, H. Yonesi, H. Rahimi, B. Shahinejad, H. T. Podeh, H. M. Azamattulla
The present paper aims to evaluate the effect of emergent rigid vegetation density on the flow's turbulence structure and hydraulic parameters at the non-prismatic floodplains. The experiments were performed using the physical model of the asymmetric non-prismatic compound channel. The results show that the velocity distribution in the vegetation flow is more influenced by the drag force caused by the vegetation than by the bed shear stress and does not follow the law of logarithmic velocity distribution throughout the non-prismatic section. The intense velocity gradient at the interface of the main channel and the floodplain leads to the development of strong secondary currents, increased Reynolds shear stresses, apparent shear stresses and momentum exchange in this region. Vegetation also decreases mean kinetic energy in the floodplain and increases it in the main channel. The mean turbulence exchange coefficient for the non-prismatic compound channels without vegetation was 0.23 and for the divergent and convergent compound channels was 0.035 and 0.020, respectively. The comparison of the local drag coefficient results shows that the fluctuations of this parameter are greater in the divergent section than in the convergent section due to the strong secondary currents in the interface.
{"title":"Effect of vegetation on flow hydraulics in compound open channels with non-prismatic floodplains","authors":"A. S. Rahim, H. Yonesi, H. Rahimi, B. Shahinejad, H. T. Podeh, H. M. Azamattulla","doi":"10.2166/aqua.2023.043","DOIUrl":"https://doi.org/10.2166/aqua.2023.043","url":null,"abstract":"\u0000 \u0000 The present paper aims to evaluate the effect of emergent rigid vegetation density on the flow's turbulence structure and hydraulic parameters at the non-prismatic floodplains. The experiments were performed using the physical model of the asymmetric non-prismatic compound channel. The results show that the velocity distribution in the vegetation flow is more influenced by the drag force caused by the vegetation than by the bed shear stress and does not follow the law of logarithmic velocity distribution throughout the non-prismatic section. The intense velocity gradient at the interface of the main channel and the floodplain leads to the development of strong secondary currents, increased Reynolds shear stresses, apparent shear stresses and momentum exchange in this region. Vegetation also decreases mean kinetic energy in the floodplain and increases it in the main channel. The mean turbulence exchange coefficient for the non-prismatic compound channels without vegetation was 0.23 and for the divergent and convergent compound channels was 0.035 and 0.020, respectively. The comparison of the local drag coefficient results shows that the fluctuations of this parameter are greater in the divergent section than in the convergent section due to the strong secondary currents in the interface.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88171495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present study aims to investigate the use of response surface methodology (RSM) modelling and experimental investigation for the optimization of lead(II) adsorption onto spent tea grains (STG). Independent process variables were optimized and found to be in the range of 38.75 mg/l (initial concentration), 5.20655 (pH), 119.32 rpm (stirring speed), and 3.25 g/l (STG dose) for a contact time of 135.05 min. The optimum adsorption capacity was found to be 8.9087 mg/g through RSM modelling with a maximum of 18.146 mg/g. The batch study was performed by varying different parameters: pH (2.0–7.0), initial concentration (5–50 mg/l), dose (0.1–1 g/100 ml), contact time (15–180 min), and stirring speed (30–200 rpm). The characterization STG was done by proximate and ultimate analysis, Fourier Transform Infrared (FTIR) Spectroscopy, X-ray diffraction (XRD) analysis, thermogravimetric analysis (TGA), and SEM-EDX. By fitting equilibrium data for lead(II) ions adsorption onto STG using the Langmuir isotherm model, the maximum adsorption capacity was found to be 24.272 mg/g. The optimum pH found for lead(II) adsorption onto STG was 5. At optimum conditions, the maximum removal efficiency of STG for lead(II) ions’ adsorption is 94.33%. Based on the findings it is safe to conclude that the STG could be used as a potential adsorbent.
{"title":"Optimization of batch study parameters for the adsorption of lead(II) ions onto spent tea grains","authors":"S. Chauhan, P. Dikshit","doi":"10.2166/aqua.2023.020","DOIUrl":"https://doi.org/10.2166/aqua.2023.020","url":null,"abstract":"\u0000 The present study aims to investigate the use of response surface methodology (RSM) modelling and experimental investigation for the optimization of lead(II) adsorption onto spent tea grains (STG). Independent process variables were optimized and found to be in the range of 38.75 mg/l (initial concentration), 5.20655 (pH), 119.32 rpm (stirring speed), and 3.25 g/l (STG dose) for a contact time of 135.05 min. The optimum adsorption capacity was found to be 8.9087 mg/g through RSM modelling with a maximum of 18.146 mg/g. The batch study was performed by varying different parameters: pH (2.0–7.0), initial concentration (5–50 mg/l), dose (0.1–1 g/100 ml), contact time (15–180 min), and stirring speed (30–200 rpm). The characterization STG was done by proximate and ultimate analysis, Fourier Transform Infrared (FTIR) Spectroscopy, X-ray diffraction (XRD) analysis, thermogravimetric analysis (TGA), and SEM-EDX. By fitting equilibrium data for lead(II) ions adsorption onto STG using the Langmuir isotherm model, the maximum adsorption capacity was found to be 24.272 mg/g. The optimum pH found for lead(II) adsorption onto STG was 5. At optimum conditions, the maximum removal efficiency of STG for lead(II) ions’ adsorption is 94.33%. Based on the findings it is safe to conclude that the STG could be used as a potential adsorbent.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78244988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The scarcity of freshwater is one of the biggest issues in the world, as a result of which more attention is given to the thermal distillation process for seawater and as well as brackish water distillation which removes almost all types of contaminants. Distillation is a phase change process in which steam is used as a heat source for evaporating the feed water. Multiple-effect distillation makes the process economical by recycling the latent heat of vaporization. In this paper, the vertical tube evaporator (VTE) design and modeled for MED for estimating the overall heat transfer coefficient by using the developed correlations of the Bell method, Kandlikar, and Kutateladze and compared its previous work in literature. The result shows good agreement with previous work and reliability in design. The developed model can be used to design the VTE for estimating the dimension for large-scale to micro-scale MED plant.
{"title":"Design and modeling of vertical tube evaporator in a thermal-driven multiple effect distillation system","authors":"Pravesh Chandra, A. Mudgal, J. Patel","doi":"10.2166/aqua.2023.116","DOIUrl":"https://doi.org/10.2166/aqua.2023.116","url":null,"abstract":"\u0000 \u0000 The scarcity of freshwater is one of the biggest issues in the world, as a result of which more attention is given to the thermal distillation process for seawater and as well as brackish water distillation which removes almost all types of contaminants. Distillation is a phase change process in which steam is used as a heat source for evaporating the feed water. Multiple-effect distillation makes the process economical by recycling the latent heat of vaporization. In this paper, the vertical tube evaporator (VTE) design and modeled for MED for estimating the overall heat transfer coefficient by using the developed correlations of the Bell method, Kandlikar, and Kutateladze and compared its previous work in literature. The result shows good agreement with previous work and reliability in design. The developed model can be used to design the VTE for estimating the dimension for large-scale to micro-scale MED plant.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76950058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heba Mohamed Hani, Mohamed M. Nour El Din, A. Khalifa, Ezzat Elalfy
Managed aquifer recharge (MAR) is considered an innovative method for storing water in the subsurface. In this work, multi-criteria decision analysis (MCDA) was used to delineate potential groundwater recharge areas for MAR implementation in Western Delta using reclaimed wastewater. By employing geographical information systems (GIS) and pairwise comparison matrix (PCM), a modified approach was utilized for the development of the suitability map by capturing the interlinkages between a specified MAR technique (spreading methods) and MAR suitability mapping processes. The developed approach was created with a range of constraining and factorial considerations. Based on the findings, MAR potential recharge zones included four main suitability classes. The presence of high-suitability areas was mainly delineated in the northeast part, particularly around the left side of the Nile River valley. Areas of low suitability were located around the west-north side where the hydrological criterion seems to hinder the implementation due to the low productivity of the hydrogeologic layer. The developed methodology reflected the importance of specific determining factors (i.e., slope and depth to depth to the water table) that govern the successful implementation of infiltration basins and maximize the benefits from soil aquifer treatments effects when taken into account with other hydrogeological and socio-economic variables.
{"title":"Development of suitability map for managed aquifer recharge: case study, West Delta, Egypt","authors":"Heba Mohamed Hani, Mohamed M. Nour El Din, A. Khalifa, Ezzat Elalfy","doi":"10.2166/aqua.2023.177","DOIUrl":"https://doi.org/10.2166/aqua.2023.177","url":null,"abstract":"\u0000 \u0000 Managed aquifer recharge (MAR) is considered an innovative method for storing water in the subsurface. In this work, multi-criteria decision analysis (MCDA) was used to delineate potential groundwater recharge areas for MAR implementation in Western Delta using reclaimed wastewater. By employing geographical information systems (GIS) and pairwise comparison matrix (PCM), a modified approach was utilized for the development of the suitability map by capturing the interlinkages between a specified MAR technique (spreading methods) and MAR suitability mapping processes. The developed approach was created with a range of constraining and factorial considerations. Based on the findings, MAR potential recharge zones included four main suitability classes. The presence of high-suitability areas was mainly delineated in the northeast part, particularly around the left side of the Nile River valley. Areas of low suitability were located around the west-north side where the hydrological criterion seems to hinder the implementation due to the low productivity of the hydrogeologic layer. The developed methodology reflected the importance of specific determining factors (i.e., slope and depth to depth to the water table) that govern the successful implementation of infiltration basins and maximize the benefits from soil aquifer treatments effects when taken into account with other hydrogeological and socio-economic variables.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77243560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Indiscriminate industrialization and urbanization have negatively impacted our environment. One of the common environmental problems in semi-urban areas in India is the discharge of inefficiently treated municipal, industrial, and domestic wastewater into the environment, resulting in the degradation of soil and water qualities. Depleting freshwater resources have led Indian farmers to look for an easily available, cheaper, and nutrient-rich source of irrigation water in the form of wastewater; however, this also led to increased pollutant transfer to the soils. Known as persistent pollutants, heavy metals such as cadmium (Cd), copper (Cu), chromium (Cr), lead (Pb), mercury (Hg), and a few others are potentially hazardous due to their nonbiodegradable nature, extended biological half-lives, and biological interactions. These heavy metals can bind to soil surfaces and then be absorbed by plant tissues.
{"title":"Heavy metals in agricultural cultivated products irrigated with wastewater in India: a review","authors":"B. Mohanty, Anirban Das","doi":"10.2166/aqua.2023.122","DOIUrl":"https://doi.org/10.2166/aqua.2023.122","url":null,"abstract":"\u0000 \u0000 Indiscriminate industrialization and urbanization have negatively impacted our environment. One of the common environmental problems in semi-urban areas in India is the discharge of inefficiently treated municipal, industrial, and domestic wastewater into the environment, resulting in the degradation of soil and water qualities. Depleting freshwater resources have led Indian farmers to look for an easily available, cheaper, and nutrient-rich source of irrigation water in the form of wastewater; however, this also led to increased pollutant transfer to the soils. Known as persistent pollutants, heavy metals such as cadmium (Cd), copper (Cu), chromium (Cr), lead (Pb), mercury (Hg), and a few others are potentially hazardous due to their nonbiodegradable nature, extended biological half-lives, and biological interactions. These heavy metals can bind to soil surfaces and then be absorbed by plant tissues.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74125702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Bui, T. Hoang, P. N. Nguyen, Nguyen Le My Linh, Q. Trieu, T. H. Bui
An increasing interest in nanocomposites prepared from agricultural/industrial byproducts has been paid for environmental remediation, especially in water treatment. This study reports the facile preparation of a low-cost magnetic biocomposite of magnetic Fe3O4 nanoparticles (NPs) incorporated with biopolymers extracted from durian husk, called bp-Fe3O4 and examined in the removal of methylene blue (MB) dye. Here, Fe2O3 NPs were first recovered from red mud waste and then converted to magnetic nanostructured Fe3O4 using a one-pot process via carbon combustion. The bp-Fe3O4 inherited the characteristics of each constituent component, while showing slightly higher saturation magnetization than the bare Fe3O4 NPs (19.84 and 18.66 emu/g, respectively), allowing for easy separation from the aqueous solution using a suitable magnet. The MB adsorption on bp-Fe3O4 reached an equilibrium state within 60 min reaction and achieved >90% of removal (at 50 mg/L MB) at an optimal pH range of 6–8. The effective adsorption of MB dye was attributed to both the hydroxylated-Fe3O4 NPs and biopolymers. The material showed excellent reusability tested up to the seventh MB adsorption cycle (decreased by <2% of adsorption efficiency). Overall, the outstanding magnetic properties and low-cost bp-Fe3O4 rendered them easily manipulated and separated, and reusable for water/wastewater treatment of MB dye.
{"title":"Magnetic nanocomposites prepared from red mud and durian husk as an effective bio-adsorbent for methylene blue adsorption","authors":"N. Bui, T. Hoang, P. N. Nguyen, Nguyen Le My Linh, Q. Trieu, T. H. Bui","doi":"10.2166/aqua.2023.051","DOIUrl":"https://doi.org/10.2166/aqua.2023.051","url":null,"abstract":"\u0000 \u0000 An increasing interest in nanocomposites prepared from agricultural/industrial byproducts has been paid for environmental remediation, especially in water treatment. This study reports the facile preparation of a low-cost magnetic biocomposite of magnetic Fe3O4 nanoparticles (NPs) incorporated with biopolymers extracted from durian husk, called bp-Fe3O4 and examined in the removal of methylene blue (MB) dye. Here, Fe2O3 NPs were first recovered from red mud waste and then converted to magnetic nanostructured Fe3O4 using a one-pot process via carbon combustion. The bp-Fe3O4 inherited the characteristics of each constituent component, while showing slightly higher saturation magnetization than the bare Fe3O4 NPs (19.84 and 18.66 emu/g, respectively), allowing for easy separation from the aqueous solution using a suitable magnet. The MB adsorption on bp-Fe3O4 reached an equilibrium state within 60 min reaction and achieved >90% of removal (at 50 mg/L MB) at an optimal pH range of 6–8. The effective adsorption of MB dye was attributed to both the hydroxylated-Fe3O4 NPs and biopolymers. The material showed excellent reusability tested up to the seventh MB adsorption cycle (decreased by <2% of adsorption efficiency). Overall, the outstanding magnetic properties and low-cost bp-Fe3O4 rendered them easily manipulated and separated, and reusable for water/wastewater treatment of MB dye.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76207105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Storm Water Management Model (SWMM) was established to simulate rainfall–runoff dynamically, and the internal runoff component of the SWMM was used to simulate rainfall operation in each watershed, including rainfall–runoff and scour pollution load. Then, using the routing component in the SWMM, the properties of runoff into the tank system are calculated through pipelines and other facilities to obtain the optimal tank volume. The coupling optimization model was established, and the algebraic function of the storage capacity, total runoff, and total cost was established by using the multiple linear regression method, which was transformed into the optimization model aiming at the minimum total runoff and total cost. The NSGA-II is improved by using a reverse learning mechanism. By solving the optimization model, the non-dominant solution of the proxy model is obtained. The non-dominant solution was substituted into the SWMM, and the rationality of the optimization results was analyzed. The experimental results show that the reservoir volume determined by this method can effectively accept the pollutants brought by the initial rain, so as to reduce the hydraulic pollution caused by the confluence overflow and the overflow pollution of the urban integrated pipe network.
{"title":"Hydraulic optimization simulation for reducing confluence and controlling the overflow pollution of storage ponds based on the Storm Water Management Model and Non-dominated Sorting Genetic Algorithm-II","authors":"Cuntian Jin","doi":"10.2166/aqua.2023.195","DOIUrl":"https://doi.org/10.2166/aqua.2023.195","url":null,"abstract":"\u0000 The Storm Water Management Model (SWMM) was established to simulate rainfall–runoff dynamically, and the internal runoff component of the SWMM was used to simulate rainfall operation in each watershed, including rainfall–runoff and scour pollution load. Then, using the routing component in the SWMM, the properties of runoff into the tank system are calculated through pipelines and other facilities to obtain the optimal tank volume. The coupling optimization model was established, and the algebraic function of the storage capacity, total runoff, and total cost was established by using the multiple linear regression method, which was transformed into the optimization model aiming at the minimum total runoff and total cost. The NSGA-II is improved by using a reverse learning mechanism. By solving the optimization model, the non-dominant solution of the proxy model is obtained. The non-dominant solution was substituted into the SWMM, and the rationality of the optimization results was analyzed. The experimental results show that the reservoir volume determined by this method can effectively accept the pollutants brought by the initial rain, so as to reduce the hydraulic pollution caused by the confluence overflow and the overflow pollution of the urban integrated pipe network.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74589974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Saurabh Srivastava, P. J. Omar, Shiwanshu Shekhar, Sneha Gupta
The major environmental toxicity of acidic pollutant in the fossil fuel gas substances has long been well known. Macro and microalgae are biological sources with large range of biotechnological uses, for e.g., bioremediation, bio-fuel, air pollutant absorber, and many more. This study addressing the use of Chlamydomonas sp. an effective biomaterial in their tolerance against 2 and 5% of the SO2 & NO2. Improve their growth kinetics by the addition of sodium bicarbonate to the culture conical media. SO2 and NO2 were provided to culture media by the use of Sodium meta-bisulfite and Nitrous acid. The control combination of SO2 and NO2 is providing: 2% SO2, 5% SO2, 2% NO2, 5% NO2, (2% SO2 + 2% NO2), (5% SO2 + 5% NO2) at the seventh day of incubation. The optimum pH ranges in between 7.1 and 8.6 when the exposure of the gas. Results suggested that the growth kinetics of Chlamydomonas sp. is greater in SO2 and some low in the 5% exposure of NO2. The maximum absorbing concentration of SO2 and NO2 was 921.625 μg/ml and 906.25 μg/ml respectively for Chlamydomonas sp. This work highlighting the potential of algae in tolerance to NO2 & SO2 from the polluted air.
{"title":"Study of acidic air pollutant (SO2 and NO2) tolerance of microalgae with sodium bicarbonate as growth stimulant","authors":"Saurabh Srivastava, P. J. Omar, Shiwanshu Shekhar, Sneha Gupta","doi":"10.2166/aqua.2023.013","DOIUrl":"https://doi.org/10.2166/aqua.2023.013","url":null,"abstract":"\u0000 The major environmental toxicity of acidic pollutant in the fossil fuel gas substances has long been well known. Macro and microalgae are biological sources with large range of biotechnological uses, for e.g., bioremediation, bio-fuel, air pollutant absorber, and many more. This study addressing the use of Chlamydomonas sp. an effective biomaterial in their tolerance against 2 and 5% of the SO2 & NO2. Improve their growth kinetics by the addition of sodium bicarbonate to the culture conical media. SO2 and NO2 were provided to culture media by the use of Sodium meta-bisulfite and Nitrous acid. The control combination of SO2 and NO2 is providing: 2% SO2, 5% SO2, 2% NO2, 5% NO2, (2% SO2 + 2% NO2), (5% SO2 + 5% NO2) at the seventh day of incubation. The optimum pH ranges in between 7.1 and 8.6 when the exposure of the gas. Results suggested that the growth kinetics of Chlamydomonas sp. is greater in SO2 and some low in the 5% exposure of NO2. The maximum absorbing concentration of SO2 and NO2 was 921.625 μg/ml and 906.25 μg/ml respectively for Chlamydomonas sp. This work highlighting the potential of algae in tolerance to NO2 & SO2 from the polluted air.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82092472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Arunakumari, Farveen Begum, L. Surinaidu, M. J. Nandan, Umamaheswari Alapati
The present study provided a comprehensive evaluation of heavy metal contamination from soil to groundwater and the associated risk to human health in an industrial area situated in Telangana state, South India. Soils at three depth levels (0, 20, and 80 cm) and groundwater samples at 32 locations have been collected in the area. The samples have been analyzed for trace metals (Mn, B, Zn, Cr, Pb, Ni, Hg, Cd, and As) to understand the heavy metal contamination. Furthermore, geo-accumulation (Igeo) of heavy metals, contamination factor, pollution index, and human health risks due to prolonged exposure to contaminated water are estimated. The results indicated that soils are moderately contaminated at 18.5, 25.9, 7.4, 14.8, and 7.1% of locations by B, Zn, Cr, Pb, Ni, and Cd, respectively, as per Igeo at 80-cm depth. However, the contamination factor indicated that 14.8% of the locations were contaminated by Mn and Zn and 7.4, 70.3, 66.6, 74, and 3.7% by B, Cr, Pb, Ni, and Cd, respectively. However, groundwater is only contaminated when groundwater levels are less than 3 m below ground level. The results also indicated higher carcinogenetic health risks if groundwater is used for a longer time.
{"title":"Persistence of heavy metals and human health risk assessment in the South Indian industrial area","authors":"K. Arunakumari, Farveen Begum, L. Surinaidu, M. J. Nandan, Umamaheswari Alapati","doi":"10.2166/aqua.2023.210","DOIUrl":"https://doi.org/10.2166/aqua.2023.210","url":null,"abstract":"\u0000 The present study provided a comprehensive evaluation of heavy metal contamination from soil to groundwater and the associated risk to human health in an industrial area situated in Telangana state, South India. Soils at three depth levels (0, 20, and 80 cm) and groundwater samples at 32 locations have been collected in the area. The samples have been analyzed for trace metals (Mn, B, Zn, Cr, Pb, Ni, Hg, Cd, and As) to understand the heavy metal contamination. Furthermore, geo-accumulation (Igeo) of heavy metals, contamination factor, pollution index, and human health risks due to prolonged exposure to contaminated water are estimated. The results indicated that soils are moderately contaminated at 18.5, 25.9, 7.4, 14.8, and 7.1% of locations by B, Zn, Cr, Pb, Ni, and Cd, respectively, as per Igeo at 80-cm depth. However, the contamination factor indicated that 14.8% of the locations were contaminated by Mn and Zn and 7.4, 70.3, 66.6, 74, and 3.7% by B, Cr, Pb, Ni, and Cd, respectively. However, groundwater is only contaminated when groundwater levels are less than 3 m below ground level. The results also indicated higher carcinogenetic health risks if groundwater is used for a longer time.","PeriodicalId":34693,"journal":{"name":"AQUA-Water Infrastructure Ecosystems and Society","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85639291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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