DOI: 10.1016/j.watres.2017.10.050
Scopus记录号: 2-s2.0-85032392356
论文题名: Impacts of coagulation-flocculation treatment on the size distribution and bioavailability of trace metals (Cu, Pb, Ni, Zn) in municipal wastewater
作者: Hargreaves A.J. ; Vale P. ; Whelan J. ; Alibardi L. ; Constantino C. ; Dotro G. ; Cartmell E. ; Campo P.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 128 起始页码: 120
结束页码: 128
语种: 英语
英文关键词: Bioavailability
; Coagulation
; Colloids
; Particle fractions
; Wastewater
Scopus关键词: Biochemistry
; Chlorination
; Chlorine compounds
; Coagulation
; Colloids
; Copper
; Dissolution
; Effluent treatment
; Effluents
; Flocculation
; Heavy ions
; Iron compounds
; Lead removal (water treatment)
; Organic carbon
; Soils
; Trace elements
; Wastewater
; Wastewater treatment
; Zinc
; Bioavailability
; Coagulation flocculation
; Colloidal organic carbon
; Environmental benefits
; Municipal wastewaters
; Organic compositions
; Particle fraction
; Particulate fraction
; Chemicals removal (water treatment)
; amino acid
; biopolymer
; coagulating agent
; colloidal organic carbon
; cuprous ion
; ferric chloride
; floculan
; lead
; nickel
; organic carbon
; phenol
; polymer
; reagent
; trace metal
; unclassified drug
; zinc ion
; chloride
; ferric ion
; heavy metal
; lead
; zinc
; bioavailability
; coagulation
; complexation
; flocculation
; humus
; organic carbon
; phenol
; size distribution
; trace metal
; wastewater
; Article
; bioavailability
; chemical composition
; coagulation flocculation treatment
; colloid
; complex formation
; concentration (parameters)
; controlled study
; dissolution
; effluent
; flocculation
; fractionation
; heavy metal removal
; humus
; infrared spectroscopy
; particle size
; particulate matter
; polymerization
; priority journal
; scanning electron microscopy
; waste water
; waste water management
; bioavailability
; chemistry
; flocculation
; pharmacokinetics
; procedures
; sewage
; waste water
; water pollutant
; Biological Availability
; Chlorides
; Ferric Compounds
; Flocculation
; Lead
; Metals, Heavy
; Microscopy, Electron, Scanning
; Spectroscopy, Fourier Transform Infrared
; Waste Disposal, Fluid
; Waste Water
; Water Pollutants, Chemical
; Zinc
英文摘要: This study investigated the impact of coagulation-flocculation treatment on metal form and bioavailability in municipal wastewater. Real humus effluent samples were separated into particulate, colloidal and truly dissolved fractions before and after treatment with either ferric chloride (FeCl3) or the biopolymer Floculan. Results revealed that both reagents effectively (≥48%) eliminated Cu, Pb and Zn from the particulate fraction and removed Cu and Zn from the colloidal fraction in conjunction with colloidal organic carbon (COC). Although organics in the truly dissolved fraction were resistant to removal, Floculan reduced Cu in this fraction by 72% owing to the complexation of free Cu ions to phenol and amino groups along the polymeric chains, revealing an additional removal pathway. In fact, COC removed in the CF process by Floculan was replaced with truly dissolved compounds, input as a result of this reagents organic composition. Floculan, therefore, reduced the soluble concentration of Cu and Zn without changing the DOC concentration, thus reducing the bioavailability of these metals in treated effluent. FeCl3 did not reduce the bioavailability of target metals, thus did not deliver any environmental benefit. This work provides important information for the selection and development of high performance coagulants to improve metal removal. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113128
Appears in Collections: 气候减缓与适应
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作者单位: Cranfield Water Science Institute, Cranfield University, College Road, Cranfield, MK43 0AL, United Kingdom; Severn Trent Water, 2 St John's Street, Coventry, CV1 2LZ, United Kingdom; Atkins, Chilbrook Oasis Business Park, Eynsham, Oxford, OX29 4AH, United Kingdom; Scottish Water, Castle House, 6 Castle Drive, Carnegie Campus, Dunfermline, KY11 8GG, United Kingdom
Recommended Citation:
Hargreaves A.J.,Vale P.,Whelan J.,et al. Impacts of coagulation-flocculation treatment on the size distribution and bioavailability of trace metals (Cu, Pb, Ni, Zn) in municipal wastewater[J]. Water Research,2018-01-01,128