DOI: 10.1016/j.watres.2017.10.066
Scopus记录号: 2-s2.0-85032819297
论文题名: Potent removal of cyanobacteria with controlled release of toxic secondary metabolites by a titanium xerogel coagulant
作者: Wang X. ; Wang X. ; Wei Z. ; Zhang S.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 128 起始页码: 341
结束页码: 349
语种: 英语
英文关键词: Coagulation
; Microcystis aeruginosa
; Secondary metabolites
; Titanium xerogel coagulant
Scopus关键词: Acetone
; Chemical water treatment
; Chlorine compounds
; Coagulation
; Efficiency
; Metabolites
; Sulfur compounds
; Surface waters
; Titanium
; Xerogels
; Cyanobacterial cells
; Environmental issues
; Initial concentration
; Microcystis aeruginosa
; Polyaluminum chloride
; Removal efficiencies
; Residual concentrations
; Secondary metabolites
; Chemicals removal (water treatment)
; acetylacetone
; aluminum
; chloride
; coagulating agent
; sulfate
; titanium
; titanium xerogel coagulant
; toxic substance
; unclassified drug
; alkanone
; aluminum hydroxide
; aluminum oxychloride
; ferric ion
; ferric sulfate
; microcystin
; bioremediation
; coagulation
; concentration (composition)
; cyanobacterium
; pollutant removal
; secondary metabolite
; toxic substance
; toxin
; water treatment
; acidity
; Article
; bacterial cell
; cell density
; cell structure
; cell viability
; concentration (parameters)
; controlled study
; cyanobacterium
; ecotoxicity
; evolution
; flocculation
; hydrolysis
; nonhuman
; photodegradation
; priority journal
; secondary metabolism
; storage
; toxicity assay
; waste component removal
; waste water management
; chemistry
; cyanobacterium
; evaluation study
; isolation and purification
; Microcystis
; photolysis
; procedures
; solar energy
; toxicity testing
; water management
; Cyanobacteria
; Microcystis aeruginosa
; Photobacteria
; Aluminum Hydroxide
; Cyanobacteria
; Ferric Compounds
; Flocculation
; Microcystins
; Microcystis
; Pentanones
; Photolysis
; Solar Energy
; Titanium
; Toxicity Tests
; Water Purification
英文摘要: Cyanobacteria blooming is a serious environmental issue throughout the world. Removal of cyanobacterial cells from surface water with controlled release of cyanobacterial organic matter (COM), especially toxic microcystins (MCs), would potentially reduce the processing burden in follow-up water treatment. Coagulation is a key technique in water treatment. Herein, the potential application of a novel titanium xerogel coagulant (TXC) was evaluated for the treatment of cyanobacteria-laden water in terms of cyanobacteria removal efficiency, variation of cell viability, the release and evolution of COM in the floc accumulation and storage process. Under acidic to neutral conditions, TXC showed a higher removal efficiency of approximately 99% for cyanobacteria and a lower residual Ti concentration than the widely-used commercial polyferric sulfate (PFS) and polyaluminum chloride (PAC). Another advantage of TXC was the reduced MCs concentration caused by the released acetylacetone (AcAc) from the hydrolysis of TXC. Under solar irradiation, AcAc degraded the extracellular MCs from an initial concentration of 40 μg/L to a residual concentration of 7 μg/L during a 16-day floc storage process. The low residual Ti concentration (< 0.04 mg/L) and the efficient removal of COM/MCs following TXC coagulation reduced the toxicity to photobacteria. The results demonstrate that TXC is a promising dual-effect coagulant for treatment of cyanobacteria-laden water. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113144
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University210023, China
Recommended Citation:
Wang X.,Wang X.,Wei Z.,et al. Potent removal of cyanobacteria with controlled release of toxic secondary metabolites by a titanium xerogel coagulant[J]. Water Research,2018-01-01,128