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

doi:10.3969/j.issn.1000-2006.2014.04.019

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (04): 102-106.doi: 10.3969/j.issn.1000-2006.2014.04.019

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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

Abstract

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.

CLC Number:

X131.2

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, 2014, 38(04): 102-106.

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

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