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材料导报  2021, Vol. 35 Issue (Z1): 530-535    
  高分子与聚合物基复合材料 |
铝污泥负载水合氧化铁-壳聚糖吸附水中Ni(Ⅱ)的研究
刘珊1,2, 廖磊1,2, 蒋翠婷1,3, 李炫妮1,2, 曹磊1,2, 赵春朋1,2
1 长安大学水利与环境学院,西安 710054
2 长安大学旱区地下水文与生态效应教育部重点实验室,西安 710054
3 达州市开江生态环境局,达州 635000
Adsorption of Ni(Ⅱ) in Water by Aluminum Sludge Loaded with Hydrous Ferric Oxides and Chitosan
LIU Shan1,2, LIAO Lei1,2, JIANG Cuiting1,3, LI Xuanni1,2, CAO Lei1,2, ZHAO Chunpeng1,2
1 School of Water and Environment,Chang'an University, Xi'an 710054, China
2 Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China
3 Bureau of Ecology Environment of Dazhou, Dazhou 635000, China
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摘要 采用铁盐和壳聚糖(CS)对铝污泥(AlS)进行改性,制得了铝污泥负载水合氧化铁-壳聚糖复合吸附剂(AlS-HFO-CS),用该吸附剂对Ni(Ⅱ)进行吸附实验,研究了溶液pH值、温度、吸附时间以及竞争离子对吸附过程的影响。利用XRD、FTIR和SEM技术表征了吸附剂的形貌并探讨AIS-HFO-CS对Ni(Ⅱ)的吸附机理。结果表明:水合氧化铁和壳聚糖能成功负载在铝污泥上;Ni(Ⅱ)的吸附量随溶液pH的增大而增大,不考虑沉淀作用,最优吸附pH为5~6,吸附平衡时间为4 h;Freundlich、Langmuir模型对AlS-HFO-CS吸附Ni(Ⅱ)的拟合效果相近,说明对Ni(Ⅱ)的吸附可能同时涉及多层物理吸附和单层化学吸附;吸附过程更符合拟一级动力学模型,颗粒内扩散模型拟合结果显示内扩散和边界层扩散共同控制吸附速率;整个吸附过程是吸热且自发进行的,并且存在着竞争性,吸附剂对Ni(Ⅱ)的吸附易受Cr(Ⅵ)和Cu(Ⅱ)的影响。
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刘珊
廖磊
蒋翠婷
李炫妮
曹磊
赵春朋
关键词:  铝污泥  水合氧化铁  壳聚糖  镍离子    
Abstract: Aluminum sludge (AlS) was modified with hydrous ferric oxides (HFO) and chitosan (CS) to prepare compound adsorbent AlS-HFO-CS, which was used to adsorb Ni(Ⅱ). The effects of pH, temperature, adsorption equilibrium time and competing ions on the adsorption of AlS-HFO-CS were studied.The morphology of the adsorbent was characterized by XRD, FTIR and SEM methods and the adsorption mechanism of Ni(Ⅱ) was discussed. The results showed hydrous ferric oxides and chitosan can be successfully loaded on aluminum sludge. The adsorption capacity of Ni(Ⅱ) increases with the increase of pH. Without considering the precipitation, the optimal adsorption pH is 5—6. The adsorption equilibrium time is 4 h. The Langmuir and Freundlich models have similar fitting effects on the adsorption of Ni(Ⅱ) by AlS-HFO-CS. The adsorption process may involve both single-layer chemical adsorption and multi-layer physical adsorption. The kinetics of the adsorption process is more in line with the pseudo-first order kinetics. The fitting results of the intra-particle diffusion model show that the intra-particle diffusion and boundary layer diffusion control the adsorption rate together. The adsorption is a spontaneous and endothermic process. There is competition in the adsorption process. The adsorption of Ni(Ⅱ) by the adsorbent is affected by Cr(Ⅵ) and Cu(Ⅱ).
Key words:  aluminum sludge    hydrous ferric oxides    chitosan    divalent nickel ion
                    发布日期:  2021-07-16
ZTFLH:  TQ 424  
  X 52  
  O 647.3  
基金资助: 国家自然科学基金(51778057)
通讯作者:  2542556962@qq.com   
作者简介:  刘珊,陕西西安人,长安大学副教授,硕士研究生导师,主要从事水污染控制技术研究及环境影响评价。蒋翠婷,重庆梁平人,毕业于长安大学,现就职于四川省达州市开江生态环境局,从事水污染控制研究。
引用本文:    
刘珊, 廖磊, 蒋翠婷, 李炫妮, 曹磊, 赵春朋. 铝污泥负载水合氧化铁-壳聚糖吸附水中Ni(Ⅱ)的研究[J]. 材料导报, 2021, 35(Z1): 530-535.
LIU Shan, LIAO Lei, JIANG Cuiting, LI Xuanni, CAO Lei, ZHAO Chunpeng. Adsorption of Ni(Ⅱ) in Water by Aluminum Sludge Loaded with Hydrous Ferric Oxides and Chitosan. Materials Reports, 2021, 35(Z1): 530-535.
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http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2021/V35/IZ1/530
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