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题名:
Highly efficient removal of phosphate using a novel Fe-La binary (hydro) oxide as adsorbent: behavior and mechanism
作者: Zhang, Wei1,2; Wang, Xiaowen3; Chen, Jing1; Zhang, Gaosheng1
刊名: DESALINATION AND WATER TREATMENT
ISSN号: 1944-3994
出版日期: 2017-07-01
卷号: 83, 页码:98-110
关键词: Fe-La binary (hydro)oxide ; Phosphate ; Adsorption ; Removal
DOI: 10.5004/dwt.2017.21046
产权排序: 第1完成单位
通讯作者: Zhang, Gaosheng(Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Zone Environm Proc, 17th Chunhui Rd, Yantai 264003, Shandong, Peoples R China)
英文摘要: Phosphate has been proved to be one of the main elements causing eutrophication of water bodies. However, the elevated phosphate concentrations in the water bodies are often due to the excess discharge of wastewater containing phosphate. Therefore, treatment of elevated phosphate-containing wastewater is of vital importance to alleviate the situation. In this study, a novel Fe-La binary (hydro) oxide adsorbent was synthesized via a facile coprecipitation method for effective phosphate removal from wastewater. The adsorbent grains were formed of primary nanoparticles. Batch experiments were carried out to investigate adsorption kinetics and equilibrium. The adsorption was fast and well fitted by the pseudo-second-order equation, indicating that the adsorption process might be chemical sorption. The adsorption isotherms could be well described by Freundlich model and the maximal adsorption capacity reached 80.7 mg/g at pH 6.0 +/- 0.1 and 67.4 mg/g at pH 9.0 +/- 0.1, respectively, much higher than many reported adsorbents. The phosphate adsorption was pH dependent and weakly acidic condition was favorable for the adsorption. The phosphatead sorption might be mainly achieved via the replacement of surface hydroxyl groups at the solid surface and the formation of inner-sphere surface complexes. Moreover, the spent adsorbent could be effectively regenerated using dilute NaOH solution and used repeatedly. All these results suggest that the adsorbent maybe a promising alternative for phosphate removal.
研究领域[WOS]: Engineering ; Water Resources
项目资助者: National Natural Science Foundation of China(51478457) ; open Fund of the Jiangsu Key Laboratory for Environment Functional Materials(SJHG1312)
关键词[WOS]: AQUEOUS-SOLUTIONS ; WASTE-WATER ; LANTHANUM OXIDE ; ALUMINUM-OXIDE ; ADSORPTION ; PHOSPHORUS ; RECOVERY ; SORPTION ; KINETICS ; SPECTROSCOPY
文章类型: Article
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000412878800011
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内容类型: 期刊论文
URI标识: http://ir.yic.ac.cn/handle/133337/23460
Appears in Collections:污染过程与控制实验室_期刊论文
中科院海岸带环境过程与生态修复重点实验室_期刊论文
山东省海岸带环境过程重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Zone Environm Proc, 17th Chunhui Rd, Yantai 264003, Shandong, Peoples R China
2.Harbin Inst Technol, Sch Municipal & Environm Engn, State Key Lab Urban Water Resource & Environm, Harbin 150090, Heilongjiang, Peoples R China
3.Yantai 2 Middle Sch Shandong Prov, 57th Chuangxin Rd, Yantai 264003, Shandong, Peoples R China

Recommended Citation:
Zhang, Wei,Wang, Xiaowen,Chen, Jing,et al. Highly efficient removal of phosphate using a novel Fe-La binary (hydro) oxide as adsorbent: behavior and mechanism[J]. DESALINATION AND WATER TREATMENT,2017,83:98-110.
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