不同变质程度超微煤粉对重金属离子的吸附性能

doi:10.16085/j.issn.1000-6613.2015.08.042

化工进展 ›› 2015, Vol. 34 ›› Issue (08): 3173-3178.DOI: 10.16085/j.issn.1000-6613.2015.08.042

不同变质程度超微煤粉对重金属离子的吸附性能

刘转年^1,2, 王艺¹, 陈龙¹, 游历¹, 张媛媛¹

1 西安科技大学地质与环境学院, 陕西西安 710054;
2 陕西省环境保护水土污染与修复重点实验室(长安大学), 陕西西安 710064

收稿日期:2014-10-26 修回日期:2015-04-20 出版日期:2015-08-05 发布日期:2015-08-05
通讯作者: 刘转年(1968—),男,教授,博士,主要从事废水处理材料与技术方面的研究。E-mail zhuannianliu@163.com。
作者简介:刘转年(1968—),男,教授,博士,主要从事废水处理材料与技术方面的研究。E-mail zhuannianliu@163.com。
基金资助:
国家自然科学基金(51278418)、陕西省工业攻关项目(2013K11-10)、榆林市产学研合作项目及中央高校基本科研业务费专项资金项目。

Adsorption of heavy metal ions by different ultrafine coal powders

LIU Zhuannian^1,2, WANG Yi¹, CHEN Long¹, YOU Li¹, ZHANG Yuanyuan¹

1 College of Geology and Environment, Xi'an University of Science & Technology, Xi'an 710054, Shaanxi, China;
2 Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province (Chang'an University), Xi'an 710064, Shaanxi, China

Received:2014-10-26 Revised:2015-04-20 Online:2015-08-05 Published:2015-08-05

摘要/Abstract

摘要： 重金属离子由于具有毒性、难以生物降解且可在生物体内累积,严重威胁人类的身体健康。吸附是去除重金属离子的一种可行有效的方法。本文选择褐煤、烟煤、无烟煤3种变质程度不同的煤种,通过高能球磨获得超微煤粉。研究了3种超微煤粉对水溶液中Ni²⁺和Cr⁶⁺的吸附动力学与热力学以及投加量与pH值对吸附效果的影响。结果表明3种煤粉对Ni²⁺、Cr⁶⁺的吸附量均随时间的增加而增加,并且Ni²⁺的处理效果明显好于Cr⁶⁺,在180min时褐煤、无烟煤与烟煤对Ni²⁺、Cr⁶⁺的吸附量分别为3.906mg/g、3.582mg/g、2.983mg/g和1.953mg/g、1.774mg/g、0.487mg/g。3种煤粉对两种重金属离子的吸附均符合二级吸附动力学和Freundlich等温式,随着投加量与pH值的增加,去除效果增加,在相同条件下,褐煤的吸附效果优于烟煤与无烟煤。

关键词: 超微煤粉, 变质程度, 吸附, 重金属

Abstract: Heavy metal ions threaten human health seriously for its toxicity, difficulty of biodegradation and accumulation in organisms. Adsorption is a feasible and effective method for the removal of heavy metal ions. In this paper, three different metamorphic grade coals of lignite, bituminite and anthracite were used to obtain the ultrafine coal powders through high energy ball milling. Adsorption mechanism and effect of dosage and pH on Ni²⁺and Cr⁶⁺ adsorption were studied. Adsorption values of Ni²⁺ and Cr⁶⁺ on three ultrafine coals all increased with time and adsorption of Ni²⁺ was better than Cr⁶⁺. The adsorption values of lignite, anthracite and bituminite for Ni²⁺ and Cr⁶⁺ were 3.906mg/g, 3.582mg/g, 2.983mg/g and 1.953mg/g, 1.774mg/g, 0.487mg/g, respectively. The adsorption kinetic data followed the pseudo second-order model and equilibrium data fitted the Freundlich equation well. With increasing dosage and pH, removal rates of Ni²⁺ and Cr⁶⁺ all increased gradually, but under the same conditions, adsorption effect of lignite was obviously better than bituminite and anthracite.

Key words: ultrafine coal powder, metamorphic grades, adsorption, heavy metal

中图分类号:

刘转年, 王艺, 陈龙, 游历, 张媛媛. 不同变质程度超微煤粉对重金属离子的吸附性能[J]. 化工进展, 2015, 34(08): 3173-3178.

LIU Zhuannian, WANG Yi, CHEN Long, YOU Li, ZHANG Yuanyuan. Adsorption of heavy metal ions by different ultrafine coal powders [J]. Chemical Industry and Engineering Progree, 2015, 34(08): 3173-3178.

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不同变质程度超微煤粉对重金属离子的吸附性能

Adsorption of heavy metal ions by different ultrafine coal powders

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