热改性蛇纹石吸附剂除镉性能研究

资源与产业 ›› 2015, Vol. 17 ›› Issue (4): 56-60.

热改性蛇纹石吸附剂除镉性能研究

齐男，梁成华，王雪，尹岩

沈阳农业大学土地与环境学院，辽宁沈阳 110866

收稿日期:2015-02-02 修回日期:2015-04-28 出版日期:2015-08-20 发布日期:2015-08-20
通讯作者: 梁成华(E-mail: liang110161@163.com)
作者简介:梁成华(E-mail: liang110161@163.com)

THE CHARACTERISTICS OF THERMAL-MODIFIED SERPENTINE`S ADSORPTION OF CADMIUM

QI Nan, LIANG Chenghua, WANG Xue, YIN Yan

College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China

Received:2015-02-02 Revised:2015-04-28 Online:2015-08-20 Published:2015-08-20

摘要/Abstract

摘要： 采用对比的方式，分别对天然蛇纹石和经700℃改性的蛇纹石做了等温吸附实验，研究蛇纹石对重金属Cd2+的吸附性能，并探讨了影响吸附的因素和吸附机理。吸附剂用量、溶液的pH值对2种蛇纹石的吸附率均有较大影响。随着吸附剂用量的增加，天然蛇纹石和热改性蛇纹石对Cd2+的吸附率都逐渐增加，且吸附率都超过了60%。在同等吸附剂用量条件下，经700℃改性的蛇纹石的吸附能力要明显强于未改性的天然蛇纹石。当pH值为3～6时，2种蛇纹石对Cd2+的吸附量都随着pH值的增加而显著增大；当pH值为6～10时，对Cd2+的吸附量趋于稳定。两种蛇纹石均符合Freundlich方程，且拟合度较好，对重金属Cd2+有较强的吸附能力；经700℃改性的蛇纹石对Cd2+的饱和吸附量为8.19 mg/g，约等于天然蛇纹石饱和吸附量的2倍。

关键词: 天然蛇纹石, 热改性蛇纹石, 除镉, 吸附量

Abstract: An isothermal adsorption test was made between natural serpentine and thermalmodified serpentine at 700 ℃ to remove the heavy ion Cd2+. This paper discusses the factors and mechanism of adsorption. Adsorption ratio depends largely on adsorbent quantity and solution pH value. Adsorption ratio rises up to over 60% with more adsorbent. Thermalmodified serpentine is obviously better than natural serpentine in adsorption ability with the same amount of adsorbent. The adsorption capacity of both increases as pH value rises from 3 to 6, and tends to be stabilized as pH value is 6-10. Two kinds of serpentine are in accordance with Freundlich formula with a good fitting. The maximum adsorption quantity of thermalmodified serpentine at 700 ℃ is 8.19 mg/g, approximately twice that of the natural serpentine.

Key words: natural serpentine, thermalmodified serpentine, cadmium adsorption, adsorption quantity

中图分类号:

F205
X703

齐男，梁成华，王雪，尹岩. 热改性蛇纹石吸附剂除镉性能研究[J]. 资源与产业, 2015, 17(4): 56-60.

QI Nan, LIANG Chenghua, WANG Xue, YIN Yan. THE CHARACTERISTICS OF THERMAL-MODIFIED SERPENTINE`S ADSORPTION OF CADMIUM[J]. Resources & Industries, 2015, 17(4): 56-60.

参考文献

[1]孙璐, 邢丽霞, 郑跃军, 等. 典型国家城市化进程中的地质环境问题及对策研究
[J]. 资源与产业, 2014, 16（6）: 129-135
[2]黄梅. 经济增长、外商直接投资与环境污染关系研究: 基于2003—2012年省级面板实证分析
[J]. 资源与产业, 2015, 17（1）: 92-97
[3]JuradoGonzález J A, GalindoRiao M D, GarcíaVargas M.〖JP〗 Experimental designs in the development of a new method for the sensitive determination of cadmium in seawater by adsorptive cathodic stripping voltammetry
[J]. Analytica Chimica Acta, 2003, 487(2): 229-241
[4]Alloway B J, Jackson A P. The behaviour of heavy metals in〖JP〗 sewage sludgeamended soils
[J]. Science of the Total Environment, 1991, 100: 151-176
[5]Singh B R. Trace element availability to plants in agricultural soils, with special emphasis on fertilizer inputs
[J]. Environmental Reviews, 1994, 2(2): 133-146 
[6]朱奇宏, 黄道友, 刘国胜, 等. 海泡石对典型水稻土镉吸附能力的影响
[J]. 农业环境科学学报, 2009, 28(11): 2318-2323
[7]田犀卓, 金兰淑, 应博, 等. 钢渣-蒙脱石复合吸附剂对水中Cd2+的吸附去除
[J]. 环境科学学报, 2015, 35（1）: 207-214
[8]郝硕硕, 朱家亮, 黄慧, 等. 改性沸石对Cd(Ⅱ)的吸附平衡及动力学
[J]. 环境工程学报, 2012, 6(8): 2693-2697
[9]宋铁红, 吕卓, 闫邢君, 等. 蒙脱石和高岭石吸附水溶液中重金属离子的实验研究
[J]. 辽宁化工, 2014, 43(2): 130-133
[10]Dlugogorski B Z, Balucan R D. Dehydroxylation of serpentine minerals: implications for mineral carbonation
[J]. Renewable and Sustainable Energy Reviews, 2014, 31: 353-367
[11]来红州, 王时麒, 俞宁. 辽宁岫岩叶蛇纹石热处理产物的矿物〖JP〗学特征
[J]. 矿物学报, 2003, 23(2): 124-128
[12]彭文世, 刘高魁. 蛇纹石族矿物及其热转变产物的红外光谱研究
[J]. 矿物学报, 1986, 6 (2): 97-102
[13]陈国玺, 刘高魁, 王冠鑫. 蛇纹石族矿物的差热曲线特征及其热转变的研究
[J]. 矿物学报, 1983, 3 (3) : 221-228
[14]彭荣华, 李晓湘. 酸改性膨润土吸附去除镍镉离子的研究
[J]. 材料保护, 2006（1）: 65-67
[15]杨智宽. 用蛇纹石处理含铜废水的研究
[J]. 环境科学与技术, 1997 (2): 17-19
[16]郭继香, 袁存光. 蛇纹石吸附处理污水中重金属的实验研究
[J]. 精细化工, 2000, 17（10）: 586-589
[17]李凝玉, 傅庆林, 郭彬, 等. 改性明矾浆吸附剂的制备及其除镉性能研究
[J]. 环境科学学报, 2012, 32(4): 808-814