绿色吸附剂松树叶去除水中Cr(Ⅵ)的性能和机理研究

PDF全文下载：2017050044

付甜, 修其慧， 许泳吉*

（青岛科技大学 生态化工国家重点实验室培育基地；化学与分子学院，山东 青岛 266042）

摘要： 将废弃松树叶用于水中Cr(Ⅵ)的吸附去除。研究发现松树叶可有效去除Cr(Ⅵ)，反应3 h后可达到吸附平衡，其最大平衡吸附量为45.73 mg·g-1。Cr(Ⅵ)在松树叶表面的吸附动力学符合准二级反应动力学和Freundlich等温线模型，其吸附过程包括表面扩散、颗粒内部扩散和吸附平衡扩散3个阶段。该吸附为吸热反应，吸附活化能为54.68 kJ·mol-1。研究表明将松树叶进行资源化利用，作为绿色吸附剂吸附去除水中的重金属离子是一种高效、环境友好的方法。

关键词： 松树叶； Cr(Ⅵ)； 吸附机理

中图分类号：  X 52文献标志码： A

引用格式：付甜, 修其慧， 许泳吉. 绿色吸附剂松树叶去除水中Cr(Ⅵ)的性能和机理研究\[J\]. 青岛科技大学学报（自然科学版）， 2017， 38（5）： 44-50.

FU Tian， XIU Qihui, XU Yongji. Adsorption efficiency and mechanism of Cr(Ⅵ) removal from waste water by using pine leaves as environmental-friendly adsorbent\[J\]. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2017, 38(5)： 44-50.

Adsorption Efficiency and Mechanism of Cr(Ⅵ) Removal from Waste Water by

Using Pine Leaves as Environmental-Friendly Adsorbent

FU Tian， XIU Qihui， XU Yongji

(State Key Laboratory Base of Ecochemical Engineering; College of Chemistry and Molecular Engineering,

Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: Pine leaves are utilized as environmental-friendly adsorbent for Cr(Ⅵ) removal from contaminant water. The kinetics and isotherm study showed that the pseudo-second-order kinetic and Freundlich isotherm models could well fit the adsorption data. The Ea of adsorption was 54-68 kJ·mol^-1, which illustrated the adsorption of Cr(Ⅵ) onto pine leaves was a heterogeneous process involved surface chemical reaction. There were three stages in the endothermic adsorption process, such as the instantaneous adsorption, the intraparticle diffusion and the final equilibrium stage. It is a kind of high efficient and environment friendly method for heavy metal ions removal using utilized pine leaves as green adsorbent.

Key words: pine leaves; Cr (Ⅵ); adsorption mechanism

收稿日期： 2016-05-18

基金项目： 国家自然科学基金项目(41340037,41573103).

作者简介： 付甜（1989—），女，硕士研究生.*通信联系人.

文章编号： 1672-6987（2017）05-0044-07； DOI： 10.16351/j.1672-6987.2017.05.008