Adsorption/desorption behavior between a novel amphoteric granular lignin adsorbent and reactive red K-3B in aqueous solutions

A novel amphoteric granular lignin adsorbent (AGLA) was prepared using magnesium lignosulfonate as a raw material which was provided by a straw sulfite pulp mill in Guangdong Province, China. A reactive dye (red K-3B) was used as an adsorbate to investigate the adsorption behavior by static and mobi...

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Bibliographic Details
Published inJournal of environmental sciences (China) Vol. 17; no. 2; p. 212
Main Authors Liu, Ming-hua, Hong, Shu-nan, Huang, Jian-hui, Zhan, Huai-yu
Format Journal Article
LanguageEnglish
Published Netherlands 2005
Subjects
Adsorption
Hydrogen-Ion Concentration
Lignin - chemistry
Magnesium Compounds - chemistry
Naphthalenes - chemistry
Temperature
Time Factors
Triazines - chemistry
Waste Disposal, Fluid - methods
Water Purification - methods
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Summary:A novel amphoteric granular lignin adsorbent (AGLA) was prepared using magnesium lignosulfonate as a raw material which was provided by a straw sulfite pulp mill in Guangdong Province, China. A reactive dye (red K-3B) was used as an adsorbate to investigate the adsorption behavior by static and mobile ways. The removal of reactive red K-3B was found to be initially pH and concentration dependent. Moreover, an increase of solution temperature ranging from 5 degrees C to 60 degrees C helped to enhance the rate of intraparticle diffusion of adsorbate and changes in the size of the pores of the adsorbent and thus to reduce the adsorption time. The total breakthrough adsorption capacity was 531 mg/g, and the saturated adsorption capacity was 560 mg/g, which prevailed over the activated carbons evidently. The reactive red K-3B adsorbed on AGLA could be recovered with a mixture of alcohol, NaCl and HCl aqueous solutions. The recovery percentage could reach 92.4%.
ISSN:1001-0742
DOI:10.3321/j.issn:1001-0742.2005.02.009