Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 122, Issue -, Pages 31-36Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2013.03.007
Keywords
Water treatment residuals; Phosphorus; Lake sediments; Desorption; Affecting factors
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Funding
- National Natural Science Foundation of China [50979007, 51179008]
- National Science and Technology Major Project [2012ZX07203-003]
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The reuse of drinking water treatment residuals (WTRs) to immobilize phosphorus (P) in sediments is a novel application for lake restoration. The recycling of WTRs is beneficial from both environmental and economic standpoints. This work assessed the stability of P in sediments found in Lake Taihu and Lake Baiyangdian before and after being amended with WTRs. The results indicated that WTRs had similar effects on the stability of P in each of the lake's sediments. WTRs can significantly reduce the P desorption potential of the sediments at pH values less than 11. WTRs can also inhibit the competitive adsorption of SiO42- with R Compared with the raw sediments, the organic matter in the sediments, ion strength and anaerobic conditions presented minor undesirable effects on the stability of P in the WTRs-amended sediments. Moreover, WTRs can increase the P adsorption rate and capacity of the sediments. Overall, these results demonstrated that WTRs can make P more stable in lake sediments under various conditions. (C) 2013 Elsevier Ltd. All rights reserved.
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