title: Assessing the stability of phosphorus in lake sediments amended with water treatment residuals.
abstract: 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 SiO4(2-) with P. 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.
authors.affiliation: The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China.
authors.forename: Changhui
authors.initials: C
authors.lastname: Wang
authors.forename: Leilei
authors.initials: L
authors.lastname: Bai
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Pei
mesh_terms: D019015:Geologic Sediments / Q000032:analysis*; D060106:Lakes / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D010758:Phosphorus