天然和处理过的粘土对Cu(II)的吸附

IF 2 Q3 Environmental Science

Water Quality Research Journal of Canada Pub Date : 2016-02-15 DOI:10.2166/WQRJC.2015.051

M. Djebbar, F. Djafri

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引用次数: 2

摘要

研究了pH值和温度对天然和处理过的阿尔及利亚粘土对铜离子吸附的影响。还对粘土进行了处理，以提高其吸附能力。x射线衍射鉴定蒙脱石和高岭石为主要粘土矿物。采用Langmuir吸附模型对吸附平衡进行数学描述，吸附平衡数据与该模型吻合较好。处理后的粘土和天然粘土的单层吸附量分别为15.40和12.22 mg/g，在pH值为6.5、温度为20℃时，吸附等温线符合Langmuir等温线，吸附系数表明粘土对Cu(II)有较好的吸附作用。热力学参数H、S和G的测定表明，吸附过程是自发的、放热的，同时伴随着熵和吉布斯能的降低。本研究的结果将有助于未来扩大使用该材料作为低成本吸附剂去除废水中的Cu(II)。

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Adsorption of Cu(II) on natural and treated clays

We have studied the pH and the temperature effects on copper ions' adsorption on natural and treated clays from Algeria. The clay was also treated to improve the adsorption capacity. X-ray diffraction identified montmorillonite and kaolinite as major clay minerals. The Langmuir adsorption model was used for the mathematical description of the adsorption equilibrium and the equilibrium data adhered very well to this model. The treated and natural clay had a monolayer adsorption capacity equal to 15.40 and 12.22 mg/g, respectively, at pH value of 6.5 and temperature 20 °C, the adsorption isotherms could be fitted with Langmuir isotherms, and the coefficients indicated favorable adsorption of Cu(II) on the clays. Determination of the thermodynamic parameters, H, S , and G showed that the adsorption process was spontaneous and exothermic accompanied by a decrease in entropy and Gibbs energy. Results of this study will be useful for future scale-up for using this material as a low-cost adsorbent for the removal of Cu(II) from wastewater.

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来源期刊

Water Quality Research Journal of Canada WATER RESOURCES-

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Water Quality Research Journal publishes peer-reviewed, scholarly articles on the following general subject areas: Impact of current and emerging contaminants on aquatic ecosystems Aquatic ecology (ecohydrology and ecohydraulics, invasive species, biodiversity, and aquatic species at risk) Conservation and protection of aquatic environments Responsible resource development and water quality (mining, forestry, hydropower, oil and gas) Drinking water, wastewater and stormwater treatment technologies and strategies Impacts and solutions of diffuse pollution (urban and agricultural run-off) on water quality Industrial water quality Used water: Reuse and resource recovery Groundwater quality (management, remediation, fracking, legacy contaminants) Assessment of surface and subsurface water quality Regulations, economics, strategies and policies related to water quality Social science issues in relation to water quality Water quality in remote areas Water quality in cold climates The Water Quality Research Journal is a quarterly publication. It is a forum for original research dealing with the aquatic environment, and should report new and significant findings that advance the understanding of the field. Critical review articles are especially encouraged.