DOI: 10.1016/j.watres.2018.01.042
Scopus记录号: 2-s2.0-85041535722
论文题名: Ozonation of municipal wastewater effluent containing metal sulfides and metal complexes: Kinetics and mechanisms
作者: Thalmann B. ; von Gunten U. ; Kaegi R.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 134 起始页码: 170
结束页码: 180
语种: 英语
英文关键词: Kinetics
; Metal complexes
; Metal sulfides
; Ozonation
; Speciation
; Wastewater treatment
Scopus关键词: Biochemistry
; Cadmium sulfide
; Chemicals removal (water treatment)
; Effluents
; Enzyme kinetics
; II-VI semiconductors
; Kinetics
; Lead compounds
; Magnesium compounds
; Metal complexes
; Metal ions
; Metals
; Nickel compounds
; Oxidation
; Ozone
; Ozone water treatment
; Ozonization
; Rate constants
; Sulfur compounds
; Toxicity
; Wastewater treatment
; Zinc sulfide
; Biological post-treatment
; Kinetics and mechanism
; Metal sulfides
; Municipal wastewater treatment plants
; Organic micro-pollutants
; Second-order rate constants
; Speciation
; Stoichiometric factors
; Copper compounds
; ammonia
; cadmium
; cadmium sulfide
; carbonic acid
; copper
; copper sulfide
; edetic acid
; lead
; magnesium
; metal complex
; nickel
; nitrate
; nitriloriacetic acid
; nitrite
; ozone
; sulfide
; unclassified drug
; zinc
; zinc sulfide
; coordination compound
; heavy metal
; nitrilotriacetic acid
; oxidizing agent
; sulfide
; concentration (composition)
; discharge
; effluent
; municipal solid waste
; organic pollutant
; ozonation
; reaction kinetics
; speciation (chemistry)
; sulfide
; wastewater treatment
; alga
; Article
; high performance liquid chromatography
; nonhuman
; oxidation
; ozonation
; priority journal
; stoichiometry
; waste water
; waste water treatment plant
; chemistry
; kinetics
; procedures
; sewage
; waste water
; water pollutant
; algae
; Coordination Complexes
; Edetic Acid
; Kinetics
; Metals, Heavy
; Nitrilotriacetic Acid
; Oxidants
; Ozone
; Sulfides
; Waste Disposal, Fluid
; Waste Water
; Water Pollutants, Chemical
英文摘要: Ozonation can be applied to mitigate the discharge of organic micropollutants from municipal wastewater treatment plants (WWTPs) to the aquatic environment. The toxicity of metals also present in WWTP effluents strongly depends on their speciation. Therefore, knowledge on the change of the metal speciation during ozonation of a WWTP effluent is essential to assess possible negative impacts. The kinetics and the stoichiometries of the reactions of ozone with three metal sulfides (ZnS, CuS and CdS) and metal-ethylenediaminetetraacetate (EDTA)/nitriloriacetic acid (NTA) complexes of Cu(II), Cd(II), Ni(II), Zn(II), Mg(II) and Pb(II) were investigated. With a stoichiometric factor of 2.6–3.9 moles of ozone per mole of sulfide and apparent second-order rate constants at pH 8 > 104 M−1 s−1, a complete oxidation of the sulfides and a concomitant release of the respective metals is expected during ozonation of a WWTP effluent for enhanced micropollutant abatement. The apparent second-order rate constants at pH 8 for the reactions of metal-EDTA complexes with ozone ranged from 42 M−1s−1 to 2.0 × 104 M−1s−1 and increased in the order Cd(II) < Cu(II) < Mg(II) < Ni(II) < Zn(II). Approximately 40% of Cd(II)-EDTA spiked to a WWTP effluent was oxidized at typical specific ozone doses of 0.5–0.7 gO3/gDOC. For the other metal-EDTA complexes a significantly higher fraction was oxidized. The bioavailable fraction determined by the diffusive-gradient thin films (DGT) method in the WWTP effluent increased during ozonation, due to the oxidative release of the metal ions. Algal toxicity (chlamynomodas reinhardtii) tests with CuS/CdS spiked WWTP effluent revealed a high tolerance toward Cu and Cd in the respective media. A toxic response was only observed at Cu concentrations above 10 μM, which is above typical WWTP effluent concentrations. Biological post-treatment after ozonation generally reduced the bioavailability of the metals, which resulted in a lower toxicity. Therefore, the biological post-treatment serves as an additional barrier to protect the downstream ecology of receiving waters. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112906
Appears in Collections: 气候减缓与适应
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作者单位: Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, Dübendorf, CH-8600, Switzerland; ETH Zürich, Institute of Biogeochemistry and Pollutant Dynamics, Zürich, CH-8092, Switzerland; School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
Recommended Citation:
Thalmann B.,von Gunten U.,Kaegi R.. Ozonation of municipal wastewater effluent containing metal sulfides and metal complexes: Kinetics and mechanisms[J]. Water Research,2018-01-01,134