DOI: 10.1016/j.watres.2018.11.069
Scopus记录号: 2-s2.0-85057417618
论文题名: Fast and efficient removal of As(III) from water by CuFe2O4 with peroxymonosulfate: Effects of oxidation and adsorption
作者: Wei Y. ; Liu H. ; Liu C. ; Luo S. ; Liu Y. ; Yu X. ; Ma J. ; Yin K. ; Feng H.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 182
结束页码: 190
语种: 英语
英文关键词: Adsorption
; Arsenite
; Efficient removal
; Oxidation
Scopus关键词: Adsorption
; Catalytic oxidation
; Copper compounds
; Iron compounds
; Oxidation
; Pollution control
; Silicates
; Sulfur compounds
; Water pollution
; Adsorption capacities
; Ambient conditions
; Arsenite
; Catalytic process
; Contaminated water
; Oxidation process
; Peroxymonosulfate
; Toxic by-products
; Water treatment
; arsenic
; carbonic acid
; copper
; copper iron oxide
; humic acid
; iron oxide
; peroxymonosulfate
; radical
; silicate
; sulfate
; unclassified drug
; water
; adsorption
; arsenic
; arsenite
; catalysis
; catalyst
; free radical
; humic acid
; inorganic compound
; ion
; oxidation
; photooxidation
; pollutant removal
; temperature effect
; water treatment
; adsorption
; Article
; catalysis
; heavy metal removal
; kinetics
; magnetic separation
; oxidation
; pH
; priority journal
; sludge
; synthesis
; temperature
; water treatment
英文摘要: Although oxidation of As(III) to As(V) is deemed necessary to promote arsenic removal, the oxidation process usually involves toxic byproducts, well-defined conditions, energy input or sludge generation. Moreover, extra operations are required to remove the resulting As(V). A heterogeneous catalytic process of CuFe2O4 with peroxymonosulfate (PMS) is established for As(III) oxidation and adsorption. The PMS can be activated by CuFe2O4 to generate radical species for As(III) oxidation. The CuFe2O4/PMS has a stronger affinity for arsenic than CuFe2O4 alone. Oxidation and adsorption promote each other. As a result, the heterogeneous catalytic process is more efficient for As(III) removal than a preoxidation of As(III) followed by adsorption. The adsorption capacity for As on CuFe2O4/PMS reached up to 63.9 mg/g, which is much higher than that of As(III) (36.9 mg/g) or As(V) (45.4 mg/g) on CuFe2O4 alone. The process can work effectively over a wide range of pH values (3–9) and temperatures (10–40 °C). Coexisting ions such as sulfate, carbonate, silicate and humic acid have an insignificant effect on As(III) removal. The As(III) (1415 μg/L) can be completely oxidized to As(V) and rapidly removed to below 10 μg/L (less than 15 min) using CuFe2O4(0.2 g/L)/PMS(100 μM). Moreover, the As(III) (50 μg/L) can be completely oxidized and removed within 1 min. The proposed process is easily applicable for the remediation of As(III)-contaminated water under ambient conditions. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122112
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China; Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, Hunan University, Changsha, 410082, China; College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China
Recommended Citation:
Wei Y.,Liu H.,Liu C.,et al. Fast and efficient removal of As(III) from water by CuFe2O4 with peroxymonosulfate: Effects of oxidation and adsorption[J]. Water Research,2019-01-01