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- W3085526477 abstract "High concentration of iron and manganese is still one of the common problems in groundwater. In this work, an integrated aeration-manganese sand filter-ultrafiltration (AMU) process was proposed to investigate the form of iron and manganese oxides and its autocatalytic effect in removing iron and manganese. The pourbaix diagram was used to characterize the degree of iron and manganese oxidation. The dependence of redox potential and atomic composition on manganese sand was then studied. The results showed that the proposed AMU process could not only remove 100 % ferrous and 90 % manganese ions due to the increased redox potential by 2 mV after manganese sand filter, but also reduce the membrane fouling due to the retention effect of manganese sand coated films formed on the surface of manganese sand. The upper layer of manganese sand coated film contained 21.86 wt% Fe whereas the lower layer contained 19.31 wt% Mn compared with that of 13.77 wt% Fe and 4.87 wt% Mn for the virgin one, respectively. The needle crystals Fe2O3 and unshaped crystals MnOx found on both the manganese sand coated films and membrane foulants indicated the anti-fouling effect of ultrafiltration membrane through the complete oxidation of iron and manganese. The proposed AMU process allowed the simultaneous oxidation and the following membrane fouling mitigation of the whole process for iron and manganese removal from groundwater." @default.
- W3085526477 created "2020-09-21" @default.
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- W3085526477 date "2020-12-01" @default.
- W3085526477 modified "2023-10-13" @default.
- W3085526477 title "Aeration-manganese sand filter-ultrafiltration to remove iron and manganese from water: Oxidation effect and fouling behavior of manganese sand coated film" @default.
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- W3085526477 doi "https://doi.org/10.1016/j.jwpe.2020.101621" @default.
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