title: Laboratory assessment of bioleaching of shallow eutrophic sediment by immobilized photosynthetic bacteria.
abstract: Eutrophic sediment is a serious problem in ecosystem restoration, especially in shallow lake ecosystems. We present a novel bioleaching approach to treat shallow eutrophic sediment with the objective of preventing the release of nitrate, phosphate, and organic compounds from the sediment to the water column, using porous mineral-immobilized photosynthetic bacteria (PSB). Bioactivity of bacteria was maintained during the immobilization process. Immobilized PSB beads were directly deposited on the sediment surface. The deposited PSB utilized pollutants diffused from the sediment as a nutritive matrix for growth. We evaluated the effects of light condition, temperature, initial pH, amount of PSB beads, and frequency of addition of PSB beads for contaminant removal efficiency during bioleaching operations. The presented study indicated that immobilized PSB beads using porous minerals as substrates have considerable application potential in bioremediation of shallow eutrophic lakes.
authors.affiliation: Key Laboratory of Solid Waste Treatment and Resource Recycle, School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China.
authors.forename: Shiyong
authors.initials: S
authors.lastname: Sun
authors.affiliation: Key Laboratory of Solid Waste Treatment and Resource Recycle, School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China.
authors.forename: Shenglan
authors.initials: S
authors.lastname: Fan
authors.affiliation: Key Laboratory of Solid Waste Treatment and Resource Recycle, School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China.
authors.forename: Kexuan
authors.initials: K
authors.lastname: Shen
authors.affiliation: Key Laboratory of Solid Waste Treatment and Resource Recycle, School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China.
authors.forename: Shen
authors.initials: S
authors.lastname: Lin
authors.affiliation: Key Laboratory of Solid Waste Treatment and Resource Recycle, School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China.
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Nie
authors.affiliation: Key Laboratory of Solid Waste Treatment and Resource Recycle, School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China. dragonlmx@126.com.
authors.forename: Mingxue
authors.initials: M
authors.lastname: Liu
authors.affiliation: Key Laboratory of Solid Waste Treatment and Resource Recycle, School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China. fqdong@swust.edu.cn.
authors.forename: Faqin
authors.initials: F
authors.lastname: Dong
authors.affiliation: Qinghe Technology Co., LTD Sichuan, Tianfu Road 1700, Chengdu, Sichuan, 610041, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
mesh_terms: D001673:Biodegradation, Environmental; D017753:Ecosystem; D005068:Eutrophication; D019015:Geologic Sediments / Q000737:chemistry / Q000382:microbiology*; D060106:Lakes / Q000737:chemistry* / Q000382:microbiology; D008962:Models, Theoretical; D010788:Photosynthesis; D012241:Rhodopseudomonas / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
chemical_list: D014874:Water Pollutants, Chemical
keywords: Bioremediation; Immobilization; Photosynthetic bacteria; Porous minerals; Sediment bioleaching