DOI: 10.1016/j.watres.2018.05.024
Scopus记录号: 2-s2.0-85047990324
论文题名: Impact of inorganic ions and natural organic matter on arsenates removal by ferrate(VI): Understanding a complex effect of phosphates ions
作者: Kolařík J. ; Prucek R. ; Tuček J. ; Filip J. ; Sharma V.K. ; Zbořil R.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 357
结束页码: 365
语种: 英语
英文关键词: Arsenates
; Fe(VI)
; Natural ions
; Oxidation
; Phosphates
; Reaction mechanism
; Water treatment
Scopus关键词: Arsenic compounds
; Biological materials
; Chlorine compounds
; Energy dispersive spectroscopy
; Hematite
; High resolution transmission electron microscopy
; Nanoparticles
; Organic acids
; Oxidation
; Phosphates
; Sulfur compounds
; Temperature
; Transmission electron microscopy
; Water pollution
; Water treatment
; Arsenates
; Crystalline structure
; Energy dispersive X ray spectroscopy
; Initial concentration
; Natural organic matters
; Reaction mechanism
; Removal efficiencies
; Ssbauer spectroscopies
; Ions
; arsenic acid
; carbonic acid
; chloride ion
; ferric ion
; humic acid
; ion
; iron 57
; nanoparticle
; natural organic matter
; nitrate
; phosphate
; sulfate
; arsenic acid derivative
; chloride
; ferrate ion
; ferric ion
; ferric oxide
; iron
; nitric acid derivative
; phosphate
; aqueous solution
; Article
; chemical structure
; complex formation
; concentration (parameters)
; crystal structure
; energy dispersive X ray spectroscopy
; low temperature
; Mossbauer spectroscopy
; oxidation
; priority journal
; surface property
; transmission electron microscopy
; waste component removal
; waste water management
; adsorption
; chemistry
; humic substance
; pH
; procedures
; water management
; water pollutant
; Adsorption
; Arsenates
; Carbonates
; Chlorides
; Ferric Compounds
; Humic Substances
; Hydrogen-Ion Concentration
; Iron
; Nitrates
; Phosphates
; Spectroscopy, Mossbauer
; Sulfates
; Water Pollutants, Chemical
; Water Purification
英文摘要: Arsenic compounds are carcinogenic to humans and are typically removed from contaminated water using various sorbents. The ionic composition plays a significant role in arsenate removal efficiency during the process of water remediation. Here, we quantify the effects of natural ions (chlorides, nitrates, carbonates, sulfates, and phosphates) and humic acid on the removal of arsenates by ferrate(VI) at pH = 6.6. In the experiments, the initial concentration of arsenates was 10 mg L−1 (as As) and the concentrations of ions varied in the range from 5 to 100 mg L−1 of element in ionic form and humic acid. The achieved results show that only phosphate ions had principle influence on the efficiency of arsenate removal by ferrate(VI). The effect of phosphates was elucidated by applying transmission electron microscopy, energy-dispersive X-ray spectroscopy, and low temperature in-field 57Fe Mössbauer spectroscopy to solid samples, prepared under different weight ratios of ferrate(VI), arsenates, and phosphates. These results show three crucial effects of phosphates on the arsenate removal mechanisms. At low P:As weight ratio (up to 1:1), the incorporation of arsenate ions into the crystalline structure of γ-Fe2O3/γ-FeOOH nanoparticles was found to be suppressed by the presence of phosphates. Thus, arsenates were mainly adsorbed onto the surface of γ-Fe2O3/γ-FeOOH nanoparticles. Further increase in the P:As weight ratio (more than 1:1) resulted in the competition between arsenates and phosphates sorption. With the increased concentration of phosphate ions, the number of arsenates on the surface of γ-Fe2O3/γ-FeOOH nanoparticles was reduced. Finally, the complexation of iron(III) ions with phosphate ions occurred, leading to a decrease in the arsenates removal efficiency, which resulted from a lower content of precipitated γ-Fe2O3/γ-FeOOH nanoparticles. All these aspects need to be considered prior to application of ferrate(VI) for arsenates removal in real natural waters. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112678
Appears in Collections: 气候减缓与适应
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作者单位: Regional Centre of Advanced Technologies and Materials, Departments of Physical Chemistry and Experimental Physics, Faculty of Science, Palacký University in Olomouc, 17. listopadu 1192/12, Olomouc, 771 46, Czech Republic; Program for the Environment and Sustainability, Department of Environmental and Occupational Health, School of Rural Public Health, Texas A&M University, 1266 TAMU, College Station, TX 77843, United States
Recommended Citation:
Kolařík J.,Prucek R.,Tuček J.,et al. Impact of inorganic ions and natural organic matter on arsenates removal by ferrate(VI): Understanding a complex effect of phosphates ions[J]. Water Research,2018-01-01,141