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Citation: CHENG Guo-Bin, HAN Mei, WANG Ren, MA Wei. Adsorption of Potassium on NH₄⁺-pretreated Clinoptilolite[J]. Chinese Journal of Applied Chemistry, ;2005, 22(10): 1092-1095. shu

Adsorption of Potassium on NH₄⁺-pretreated Clinoptilolite

CHENG Guo-Bin ^a ,
HAN Mei ^b ,
WANG Ren ^b ,
MA Wei ^b,,

1.
a Department of Chemistry, Pingdingshan College, Pingdingshan;
2.
b Department of Chemistry, Dalian University of Technology, Dalian 116024

Corresponding author: MA Wei,
Received Date: 8 October 2004
Available Online: 26 June 2005
Fund Project: 国家自然科学基金(29777011)资助项目 (29777011)

The adsorption behavior of NH₄⁺-pretreated clinoptilolite for potassium ions was studied.The effects of competing cations were investigated.The results indicate that NH₄⁺-pretreated clinoptilolite adsorbed potassium ions with high adsorption capacity.The adsorption behavior of the NH₄⁺-pretreated clinoptilolite deviated from the original trend at the equivalent fraction of K⁺ in the clinoptilolite Y_K⁺=0.5 due to the effect of potassium concentration.The presence of competing cations,mainly sodium ions,surpressed the exchange capacity for potassium,in particular the ratio of potassium ions to sodium ions directly influenced the selec-tivity of potassium on the NH₄⁺-pretreated clinoptilolite.
- NH₄⁺-pretreated clinoptilolite,
- competing cations,
- adsorption selectivity,
- adsorption capacity
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Adsorption of Potassium on NH₄⁺-pretreated Clinoptilolite