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腐殖酸改性及其对镉的吸附特性(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年04期
Page:
102-106
Column:
研究论文
publishdate:
2014-07-01

Article Info:/Info

Title:
Study on the modification of humic acid and its adsorption to cadmium
Article ID:
1000-2006(2014)04-0102-05
Author(s):
CHEN Rongping1 ZHANG Yinlong2* 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
Keywords:
humic acid modification adsorption cadmium heavy metal waste water
Classification number :
X131.2
DOI:
10.3969/j.issn.1000-2006.2014.04.019
Document Code:
A
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.

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Last Update: 2014-07-31