腐殖酸改性及其对镉的吸附特性

doi:10.3969/j.issn.1000-2006.2014.04.019

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南京林业大学学报（自然科学版） ›› 2014, Vol. 38 ›› Issue (04): 102-106.doi: 10.3969/j.issn.1000-2006.2014.04.019

腐殖酸改性及其对镉的吸附特性

陈荣平¹,张银龙^2*,马爱军³,蒋为民³

1.南京林业大学化学工程学院,江苏南京 210037;
2.南京林业大学森林资源与环境学院,江苏南京 210037;
3.江苏农林职业技术学院,江苏句容 212400

出版日期:2014-07-31 发布日期:2014-07-31
基金资助:
收稿日期:2013-05-20 修回日期:2014-01-27
基金项目:国家林业局“948”项目(2011-4-81); 江苏高校优势学科建设工程资助项目(PAPD); 南京林业大学创新项目(CX2011-09)
第一作者:陈荣平,讲师,博士。*通信作者:张银龙,教授。 E-mail:ylzhang@njfu.edu.com。
引文格式:陈荣平,张银龙,马爱军,等. 腐殖酸改性及其对镉的吸附特性[J]. 南京林业大学学报:自然科学版,2014,38(4):102-106.

Study on the modification of humic acid and its adsorption to cadmium

CHEN Rongping¹, ZHANG Yinlong^2*, MA Aijun³, JIANG Weimin³

1.College of Chemistry Engineering, Nanjing Forestry University,Nanjing 210037,China;
2. College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037,China;
3. Jiangsu Polytechnic College of Agriculture and Forestry, Jurong 212400,China

Online:2014-07-31 Published:2014-07-31

摘要/Abstract

摘要： 对腐殖酸改性前后表面理化性质的改变及其对水中镉离子的吸附性能进行了研究。结果表明,改性后腐殖酸比表面积和孔结构均有明显改善,吸附能力增强。吸附实验结果表明:随着pH的增大,改性后腐殖酸对镉离子的吸附量增加,在pH约为6时,吸附效率达到最大并趋于稳定; 改性后腐殖酸对镉离子的吸附最高可达20 mg/g,吸附等温线用Langmuir模型拟合最佳。吸附再生实验表明,改性腐殖酸吸附剂具有不易损失、易再生的特点,可以循环使用。

Abstract: Variation of the surface physical-chemical properties of humic acid(HA)before and after modification and their adsorption properties for Cd²⁺ in water were investigated. The adsorption behaviors of modified HA on Cd²⁺ were also examined under various experimental conditions. It was observed that the surface textural properties of modified HA were improved, which was in favour of adsorption. The fundamental adsorption experiments revealed that the modified HA was more efficient for Cd²⁺ removal when initial solution pH was about 6. The theoretical maximal adsorption capacity is about 20 mg/g. Which is based on the simulation results from the isothermal equilibrium study. The adsorption equilibrium behaviors were in accordance with Langmuir model. Furthermore, the modified HA adsorbent could be easily regenerated and reused with almost no loss of adsorption capacity, which would be satisfactory for practical applications.

中图分类号:

X131.2

陈荣平,张银龙,马爱军,等. 腐殖酸改性及其对镉的吸附特性[J]. 南京林业大学学报（自然科学版）, 2014, 38(04): 102-106.

CHEN Rongping, ZHANG Yinlong, MA Aijun, JIANG Weimin. Study on the modification of humic acid and its adsorption to cadmium[J].Journal of Nanjing Forestry University (Natural Science Edition), 2014, 38(04): 102-106.DOI: 10.3969/j.issn.1000-2006.2014.04.019.

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腐殖酸改性及其对镉的吸附特性

Study on the modification of humic acid and its adsorption to cadmium

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