Your search found 5 records
1 Ghosal, U.; Sikdar, P. K.; McArthur, J. M. 2015. Palaeosol control of arsenic pollution: the Bengal Basin in West Bengal, India. Groundwater, 53(4):588-599. [doi: https://doi.org/10.1111/gwat.12251]
Groundwater ; Arsenic ; Contamination ; Water pollution ; Water quality ; Palaeosols ; Sand ; Clay ; Aquifers ; Manganese ; Health hazards ; Hydrogeology ; Models ; Wells ; Drilling / India / West Bengal / Bengal Basin
(Location: IWMI HQ Call no: e-copy only Record No: H047963)
http://onlinelibrary.wiley.com/doi/10.1111/gwat.12251/epdf
https://vlibrary.iwmi.org/pdf/H047963.pdf
https://vlibrary.iwmi.org/pdf/H047963.pdf
(2.35 MB) (2.35 MB)
Groundwater in the Bengal Basin is badly polluted by arsenic (As) which adversely affects human health. To provide low-As groundwater for As mitigation, it was sought across 235 km2 of central West Bengal, in the western part of the basin. By drilling 76 boreholes and chemical analysis of 535 water wells, groundwater with <10 µg/L As in shallow aquifers was found under one-third of a study area. The groundwater is in late Pleistocene palaeo-interfluvial aquifers of weathered brown sand that are capped by a palaeosol of red clay. The aquifers form two N-S trending lineaments that are bounded on the east by an As-polluted deep palaeo-channel aquifer and separated by a shallower palaeo-channel aquifer. The depth to the top of the palaeo-interfluvial aquifers is mostly between 35 and 38 m below ground level (mbgl). The palaeo-interfluvial aquifers are overlain by shallow palaeo-channel aquifers of gray sand in which groundwater is usually As-polluted. The palaeosol now protects the palaeo-interfluvial aquifers from downward migration of As-polluted groundwater in overlying shallow palaeo-channel aquifers. The depth to the palaeo-interfluvial aquifers of 35 to 38 mbgl makes the cost of their exploitation affordable to most of the rural poor of West Bengal, who can install a well cheaply to depths up to 60 mbgl. The protection against pollution afforded by the palaeosol means that the palaeo-interfluvial aquifers will provide a long-term source of low-As groundwater to mitigate As pollution of groundwater in the shallower, heavily used, palaeo-channel aquifers. This option for mitigation is cheap to employ and instantly available.
2 Khadse, G. K.; Patni, P. M.; Labhasetwar, P. K. 2015. Removal of iron and manganese from drinking water supply. Sustainable Water Resources Management, 1(2):157-165. [doi: https://doi.org/10.1007/s40899-015-0017-4]
Drinking water ; Waste water treatment plants ; Water supply ; Water quality ; Iron ; Manganese ; Filtration ; Maintenance ; Odour abatement ; Chlorine ; Potassium permanganate ; Chemicophysical properties ; pH ; Lakes / India / Nagpur / Hingna / Ambazari Lake
(Location: IWMI HQ Call no: e-copy only Record No: H047973)
(0.62 MB)
The water treatment plant at the Hingna industrial area receives raw water from Ambazari Lake and supplies drinking water to industrial area, after conventional treatment. The treated water was found to have a pungent odour and yellow colour, which in turn changed from a brown to black precipitate. The water becomes aesthetically unacceptable to consumers. It was observed that a blackish precipitate formation was due to the presence of iron and manganese in lake water, which was not completely removed during treatment. To remove iron and manganese from drinking water, treatment studies were carried out with chlorine and KMnO4 as oxidants. Alum and lime were added for coagulation and pH correction. Jar test studies revealed that treatment with potassium permanganate at pH 7.7–8.0 was effective in the removal of iron, manganese and organics, which were responsible for causing colour and odour to water. The studies helped in improvements in water quality for safe drinking water supply.
3 Dube, S.; Muchaonyerwa, P.; Mapanda, F.; Hughes, J. 2018. Effects of sludge water from a water treatment works on soil properties and the yield and elemental uptake of brachiaria decumbens and lucerne (medicago sativa). Agricultural Water Management, 208:335-343. [doi: https://doi.org/10.1016/j.agwat.2018.06.015]
Wastewater treatment ; Sewage sludge ; Water reuse ; Irrigation water ; Crops ; Brachiaria decumbens ; Medicago sativa ; Yields ; Nutrient uptake ; Soil properties ; Chemical composition ; Aluminium ; Manganese ; Toxicity ; Chemicophysical properties / Zimbabwe / Harare
(Location: IWMI HQ Call no: e-copy only Record No: H048901)
(0.54 MB)
This study assessed the effects of irrigation with different dilutions of sludge water, a wastewater from an aluminium-based drinking water treatment plant in Harare, Zimbabwe, on yield and elemental uptake of Brachiaria decumbens (brachiaria) and Medicago sativa (lucerne), and on properties of clay and sandy loam soils. The sludge water was characterised and diluted to 25%, 50% and 75% of the original concentration with tap water. The dilutions, together with 100% sludge water and tap water, were used to irrigate brachiaria and lucerne in a pot experiment. Shoot plant material was harvested and analysed for biomass, total nitrogen (N), phosphorus (P), Ca, Mg, K, aluminium (Al), boron (B), iron (Fe), manganese (Mn), copper (Cu) and zinc (Zn). Soils were analysed for particle size distribution, organic carbon, (before use only), pH, exchangeable acidity and extractable P, Fe, Mn, Cu and Zn before use and after harvesting. Increasing sludge water concentration increased yield and uptake of nutrients of both crops, without accumulating pollutants in the tissues to phytotoxic levels in both soils for brachiaria and in the sandy loam soil for lucerne. Tissue Al and Fe were not affected by sludge water concentration but were higher than maximum tolerable levels. An increase in sludge water concentration increased soil pH in the sandy loam soil more than in the clay under both crops. Undiluted sludge water may be used to irrigate brachiaria, while dilution to 75% of its original concentration is required for lucerne, at least in the short term, without negatively affecting plant growth.
4 Haroon, B.; Ping, A.; Pervez, A.; Faridullah; Irshad, M. 2019. Characterization of heavy metal in soils as affected by long-term irrigation with industrial wastewater. Journal of Water Reuse and Desalination, 9(1):47-56. [doi: https://doi.org/10.2166/wrd.2018.008]
Wastewater irrigation ; Industrial wastewater ; Irrigated soils ; Heavy metals ; Contamination ; Lead ; Nickel ; Manganese ; Copper ; Cadmium ; Iron ; Zinc ; Soil properties ; Fractionation ; Farmers / Pakistan / Hattar
(Location: IWMI HQ Call no: e-copy only Record No: H049121)
https://iwaponline.com/jwrd/article-pdf/9/1/47/522943/jwrd0090047.pdf
https://vlibrary.iwmi.org/pdf/H049121.pdf
https://vlibrary.iwmi.org/pdf/H049121.pdf
(0.21 MB) (216 KB)
Investigation of heavy metals (HM) fractions in soils irrigated with wastewater (WW) would ascertain their bioavailability and contamination level in soils. This study investigated HM fractions in soils after long-term WW irrigation. WW irrigation profoundly affected HM fractions in soil. The ranges of HM concentrations in soils irrigated with WW were apparently wide. All fractions were significantly higher in the fields irrigated with industrial WW than rain-fed fields. HM concentrations varied in the soils as Pb > Cu > Ni > Zn > Fe > Cd > Mn after WW irrigation. In rainfed fields, HM concentrations differed in soils as Fe > Zn > Mn > Pb > Cd > Cu > Ni. The HM fractions were dominant in the residual form followed by oxides bound and carbonate associated fractions in WW-irrigated soils. Lower contents of HM in the soil were obtained in the exchangeable fraction. WW irrigation resulted in the transformation of HM into different fractions as residual > oxide associated > carbonate associated > organically bound > exchangeable form. Repeated WW irrigation increased pH values of the soils. The higher EC of soil indicated an accumulation of salts in the soils due to WW irrigation. Mitigation of HM contamination in Hattar industrial effluent is required before irrigation.
5 Chakraborty, T. K; Ghosh, G. C.; Ghosh, P.; Jahan, I.; Zaman, S.; Islam, Md. S.; Hossain, Md. R.; Habib, A.; Biswas, B.; Sultana, N.; Khan, A. S. 2022. Arsenic, iron, and manganese in groundwater and its associated human health risk assessment in the rural area of Jashore, Bangladesh. Journal of Water and Health, 20(6):888-902. [doi: https://doi.org/10.2166/wh.2022.284]
Groundwater pollution ; Public health ; Health hazards ; Risk assessment ; Heavy metals ; Arsenic ; Iron ; Manganese ; Water quality ; Contamination ; Drinking water ; Tube wells ; Rural areas ; Sensitivity analysis / Bangladesh / Jashore
(Location: IWMI HQ Call no: e-copy only Record No: H051258)
https://iwaponline.com/jwh/article-pdf/20/6/888/1066737/jwh0200888.pdf
https://vlibrary.iwmi.org/pdf/H051258.pdf
https://vlibrary.iwmi.org/pdf/H051258.pdf
(0.64 MB) (652 KB)
This study investigated groundwater pollution and potential human health risks from arsenic, iron, and manganese in the rural area of Jashore, Bangladesh. Study results show that the mean value of groundwater pH is 7.25 ± 0.31, with a mean conductivity of 633.94 ± 327.41 µs/cm, while about 73, 97, and 91% of groundwater samples exceeded the Bangladesh drinking water standard limits for As, Fe, and Mn, respectively. Groundwater pollution evaluation indices, including the heavy metal pollution index, the heavy metal evaluation index, the degree of contamination, and the Nemerow pollution index, show that approximately 97, 82, 100, and 100% of samples are in the high degree of pollution category, respectively. Spatial distribution exhibited that the study area is highly exposed to As (73%), Fe (82%), and Mn (46%). In the case of non-carcinogenic health risk via oral exposure, about 94% of samples suggest a high category of risk for infants, and 97% of samples are found to be at high risk for children and adults. The carcinogenic risk of arsenic via an oral exposure pathway suggests that approximately 97% of the samples are found to be at high risk for infants, and all of the samples are at high risk for both adults and children.
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