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- W2375839963 abstract "The wastewater containing high concentration of nickel generated from reverse osmosis process in an electroplating plant was treated by a two-stage precipitation using alkali and phosphate successively. The process flow mainly composed of chemical oxidation/decomplexation, first precipitation, and secondary precipitation. The effects of p Hs of first and secondary precipitation steps on nickel removal efficiency, as well as the effects of dosages of Na2HPO4 dosage in secondary precipitation and polymerized ferric sulfate(PFS) after secondary precipitation on the total nickel and phosphorous contents in effluent were studied. The total nickel content in effluent is stably below 0.2 mg/L by precipitation at p H 9.5 initially and then at 10.0 with the addition of 50 mg/L Na2HPO4, and can be further below 0.1 mg/L after mixing with other wastewater, meeting the requirement of Table 3 in GB 21900–2008 standard. The dosage of PFS after secondary precipitation should be based on the total phosphorous content of effluent at final outfall.The cost of chemicals used for treating the nickel-containing wastewater by the process is ca.3.69 RMB per cubic meter." @default.
- W2375839963 created "2016-06-24" @default.
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- W2375839963 date "2014-01-01" @default.
- W2375839963 modified "2023-09-23" @default.
- W2375839963 title "Treatment of nickel-containing electroplating wastewater by two-stage precipitation process" @default.
- W2375839963 hasPublicationYear "2014" @default.
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