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- Title
Laboratory assessment of bioleaching of shallow eutrophic sediment by immobilized photosynthetic bacteria.
- Authors
Sun, Shiyong; Fan, Shenglan; Shen, Kexuan; Lin, Shen; Nie, Xiaoqin; Liu, Mingxue; Dong, Faqin; Li, Jian
- 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.
- Subjects
BACTERIAL leaching; EUTROPHICATION; SEDIMENTS; PHOTOSYNTHETIC bacteria; POLLUTANTS
- Publication
Environmental Science & Pollution Research, 2017, Vol 24, Issue 28, p22143
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-016-8077-z