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Characteristics of adsorption of K+ on humic acid extracted from brown coal
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Liu, Fangchun (College of Resource and Environment, Shandong Agricultural University);
Xing, Shangjun; Liu, Chunsheng; Du, Zhenyu; Duan, Chunhua

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: Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering, v 35, n 4, August, 2006, p 27-31 Language: Chinese

Database: Compendex
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Accession number:  20064310201301

Title:  Characteristics of adsorption of K+ on humic acid extracted from brown coal

Authors:  Liu, Fangchun; Xing, Shangjun; Liu, Chunsheng; Du, Zhenyu; Duan, Chunhua  

Corr. author affiliation:  College of Resource and Environment, Shandong Agricultural University, Tai'an 271018, China

Source title:  Rengong Jingti Xuebao/Journal of Synthetic Crystals

Abbreviated source title:  Rengong Jingti Xuebao

Volume:  35

Issue:  4

Issue date:  August 2006

Publication year:  2006

Pages:  27-31

Language:  Chinese

ISSN:  1000985X

CODEN:  RJXUEN

Document type:  Journal article (JA)

Publisher:  Chinese Ceramic Society, Beijing, China

Abstract:  The purpose of this research is to offer basic data for the utilization of brown coal and the production of humic acid slow-release fertilizers. The effects of K+ concentration, equilibrium time, ratio of solid to liquid and pH value on adsorption characteristics of the K+ humic acid extracted from brown coal and its absorptive regularity were studied by isothermal adsorption methods. Results show that pH value increase of medium was of great advantage for K+ adsorption and could improve the velocity of adsorption reaction. Under the condition of pH less than or equal 4. 4, physical adsorption was dominant. However, under the condition of 7. 12 less than or equal pH less than or equal 12. 95, chemical exchange was dominant. The distribution coefficient and adsorption capacity of the experimental humic acid treated by nitric were significantly higher than those of the brown coal without being treated. The adsorption of K+ on humic acid could be well described by Langmuir equation and its kinetics adsorption fit in with Elovich equations best. The adsorption capacity of the experimental humic acid treated by nitric was higher than that of the brown coal without treated. Suitable ratio of solid to liquid could increase the unit adsorption, when the ratios were 0.06 and 0. 04, the unit adsorptions can reach maximum being 0. 079 g/g and 0. 094 g/g, respectively.

Number of references:  15

Database:  Compendex

Compilation and indexing terms, © 2009 Elsevier Inc.
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