Experimental assessment of adsorption of Cu2+ and Ni2+ from aqueous solution by oyster shell powder
Experimental assessment of adsorption of Cu2+ and Ni2+ from aqueous solution by oyster shell powder
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DOI：
10.1016/j.jhazmat.2009.06.105
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发表时间：
2009-11-15
影响因子：
13.6
通讯作者：
Hsu, Ting-Chu
中科院分区：
文献类型：
--
作者：
Hsu, Ting-Chu
研究发现牡蛎壳粉（OSP）能有效吸附废水中的Cu 2+和Ni 2+，且对Cu 2+的吸附量较大。OSP对Cu ~（2+）和Ni ~（2+）的吸附符合Langmuir、Freundlich和Dubininin-Kaganer-Radushkevich吸附等温式（R ~ 2分别为0.949-0.984、0.912-0.988和0.900-0.990）。Δ H度和Δ S度的正值表明这些吸附本质上是吸热的; E值（在1.722和3.553 kJ mol（-1）之间）与物理吸附机制一致。OSP对Cu ~（2+）和Ni ~（2+）的吸附符合准二级动力学。OSP对Cu ~（2+）和Ni ~（2+）的吸附容量分别为49.26-103.1和48.75- 94.3mg·g ~（-1）。(C)2009爱思唯尔有限公司版权所有。
In this study, I found that oyster shell powder (OSP) can effectively adsorb Cu2+ and Ni2+ from wastewater, with the adsorption capacity being higher for the former ion. The isotherms for the adsorption of Cu2+ and Ni2+ on the OSP fitted the Langmuir, Freundlich, and Dubinin-Kaganer-Radushkevich isotherms quite well (R-2 = 0.949-0.984, 0.912-0.988 and 0.900-0.990, respectively). Positive values of Delta H degrees, and Delta S degrees, indicated that these adsorptions were endothermic in nature; the values of E (between 1.722 and 3.553 kJ mol(-1)) were consistent with a physical adsorption mechanism. Moreover, the adsorptions of Cu2+ and Ni2+ on the OSP followed pseudo-second-order kinetics. The adsorption capacities of the OSP toward Cu2+ and Ni2+ were 49.26-103.1 and 48.75-94.3 mg g(-1), respectively. (C) 2009 Elsevier B.V. All rights reserved.