Adsorptive removal of nickel by modified natural adsorbents: optimization, characterization and application
文献类型： 外文期刊
作者： Yi, Qingping 1 ; Fan, Ruiyi 3 ; Min, Huiyu 4 ; Zhang, Qinglin 4 ; Luo, Zhengrong 4 ;
作者机构： 1.Jingchu Univ Technol, Coll Bioengn, Jingmen 448000, Peoples R China
2.Chinese Natl WEEE Recycling Engn Res Ctr, Jingmen 448124, Peoples R China
3.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Key Lab South Subtrop Fruit Biol & Genet Resource, Guangdong Prov Key Laboratary Trop & Subtrop Frui, Guangzhou 510640, Peoples R China
4.Huazhong Agr Univ, Key Lab Hort Plant Biol MOE, Wuhan 430070, Peoples R China
5.Huanggang Normal Univ, Hubei Collaborat Innovat Ctr Characterist Resourc, Huanggang 438000, Peoples R China
关键词： Persimmon residues; Nickel; Removal; Sorption; Wastewater treatment
期刊名称：DESALINATION AND WATER TREATMENT （ 影响因子：1.254； 五年影响因子：1.553 ）
ISSN： 1944-3994
年卷期： 2020 年 183 卷
页码：
收录情况： SCI
摘要： The adsorptive removal of nickel by persimmon tannin-based adsorbents was first evaluated. NaOH modified persimmon powder-formaldehyde resin (NPPFR) showed significantly enhanced adsorption capacity towards Ni(II). The adsorption process was completely achieved equilibrium within 60 min, and the well-fitted pseudo-second-order kinetics data indicated that chemisorption is the main rate-limiting step. The adsorption isotherms followed the Langmuir model, where the maximum adsorption capacity reached 81.6 mg g(-1) at pH 5.0. The adsorbed Ni(II) ions were desorbed by 0.1 mol L-1 HNO3 and the regenerated adsorbent exhibited undiminished sorption efficiency for 4 cycles. The removal of Ni(II) from actual industrial wastewaters in both batch and column experiments was demonstrated to be effective. The adsorption mechanism was proposed to be electrostatic attraction and ion exchange. In addition, competition and replacement during the adsorption process were found in the multiple metal ions systems. The results indicated that NPPFR can serve as a low-cost, eco-friendly and effective alternative for Ni(II) removal in wastewater treatment.
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