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Mechanism insight into the role of clay particles on enhancing phosphate removal by ferrate compared with ferric salt
Li, Wentao; Ouyang, Fan; An, Guangyu; Yang, Chenggang; Zhong, Runsheng; Xiao, Feng; Peng, Dan; Wang, Dongsheng
2021-09
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
Volume28Issue:33Pages:45414-45421
AbstractThe application of ferrate (Fe(VI)) and ferric chloride as coagulants for treating phosphate wastewater in the presence of kaolin clay particles was comparatively studied. The phosphate removal processes by ferrate and ferric chloride assisted with kaolin clay particles were investigated under different Fe/P molar ratios. At neutral pH, complete removal of phosphates by ferrate and ferric chloride was observed at 2:1 and 6:1 of Fe/P molar ratio, respectively. The effect of kaolin clay particles on the phosphate removal process was discussed by zeta potential, size particle distribution, FTIR and XPS. We showed that with the increase of Fe/P molar ratio, the interaction intensity of kaolin clay particles with Fe flocs was decreased by ferric chloride coagulation while firstly increased and then decreased by ferrate. This depends on the Fe species with positive charge from ferric chloride hydrolysis and ferrate decomposition. Phosphate can inhibit the formation of FeOH2+ and Fe(OH)(2)(+) in the ferric chloride hydrolysis but promote the formation of FeOOH and Fe(OH)(2)(+) in the ferrate decomposition. Kaolin clay particles can more remarkably promote phosphate removal by ferrate than by ferric chloride.
Department环境水质学国家重点实验室
KeywordFe(VI) Ferric chloride Coagulation mechanism Kaolin particles Particle size Fe species Phosphate removal process
WOS Research AreaEnvironmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45960
Collection环境水质学国家重点实验室
Affiliation1.Shenzhen Inst Informat Technol, Shenzhen 518172, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
3.Nucl & Radiat Safety Ctr MEE, Beijing 102400, Peoples R China
4.North China Elect Power Univ, Sch Renewable Energy, Beijing 102206, Peoples R China
Recommended Citation
GB/T 7714
Li, Wentao,Ouyang, Fan,An, Guangyu,et al. Mechanism insight into the role of clay particles on enhancing phosphate removal by ferrate compared with ferric salt[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2021,28(33):45414-45421.
APA Li, Wentao.,Ouyang, Fan.,An, Guangyu.,Yang, Chenggang.,Zhong, Runsheng.,...&Wang, Dongsheng.(2021).Mechanism insight into the role of clay particles on enhancing phosphate removal by ferrate compared with ferric salt.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,28(33),45414-45421.
MLA Li, Wentao,et al."Mechanism insight into the role of clay particles on enhancing phosphate removal by ferrate compared with ferric salt".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 28.33(2021):45414-45421.
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