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- W2810292013 abstract "Nanofiltration is an emerging technology applied to increase the availability of safe drinking water. This study evaluates nanofiltration as a feasible process to reach the new regulatory concentration limit for hexavalent chromium (0.01 mg/L) in potable water. Real well water contaminated with chromium was treated using two types of membranes of different selectivity in bench-scale and pilot-scale experiments. The pilot system comprised two modules in series and was run for 42 days without chemical cleaning, at an applied pressure of < 6 bar. A flux decline of around 20% of the initial value was observed with both membrane types. Observed rejection was constant (> 98%) for the denser membrane, while it decreased from 95% to 70% for the less selective membrane. This result may be attributed to the impairment of charge-based rejection of chromate ions. Based on these results, a full-scale plant is proposed to treat the contaminated well water, equipped with the more selective membranes. The optimal plant configuration would consist of two stages, with a total number of 96 modules to produce 30 L/s of potable water. Based on equations developed to describe contaminant concentrations in the streams entering and exiting a generic plant, guidelines are also provided to perform a preliminary system analysis. An economic assessment showed an average cost of <0.3 € per cubic meter of product water considering both capital and operational costs, for a plant lifetime of 10 years. From an environmental perspective, power supply would be the most impactful item of the plant." @default.
- W2810292013 created "2018-07-10" @default.
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- W2810292013 date "2018-08-01" @default.
- W2810292013 modified "2023-10-03" @default.
- W2810292013 title "Design and performance of a nanofiltration plant for the removal of chromium aimed at the production of safe potable water" @default.
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- W2810292013 doi "https://doi.org/10.1016/j.jece.2018.06.055" @default.
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