USE OF TNSAC IN PHOSPHATE ADSORPTION STUDIES AND RELATIONSHIPS - EFFECTS OF ADSORPTION OPERATING VARIABLES AND RELATED RELATIONSHIPS

被引:41
作者
BHARGAVA, DS [1 ]
SHELDARKAR, SB [1 ]
机构
[1] GOVT ENGN COLL,DEPT CIVIL ENGN,PONDA,GOA,INDIA
关键词
TAMARIND NUT SHELL; ACTIVATED CARBON; PHOSPHATE ADSORPTION; OPERATION VARIABLES;
D O I
10.1016/0043-1354(93)90091-U
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The phosphate removal potential of a low cost and abundantly available material, tamarind nut shell activated carbon (TNSAC) was investigated. A previous paper of ours has described the laboratory scale production of this material and the effects of the process variables (unrinsed and rinsed forms of the TNSAC and the impregnation ratio) on its performance in adsorbing phosphates. This paper discusses the effects of operating variables (adsorbent particles size, initial adsorbate concentration, adsorbent dose and contact time duration) on the phosphate adsorption by the TNSAC. Phosphate removal is seen to increase with increasing adsorbent doses, decreasing adsorbent particle size and increasing ratios of initial phosphate concentration to adsorbent dose. The unrinsed TNSAC provides higher phosphate removal in comparison to the rinsed TNSAC. The maximum difference in the effectiveness of the unrinsed and rinsed TNSAC is seen to occur at an adsorbent dose of 2 g l-1 under the test conditions. The lowest equilibrium phosphate concentration is attained at an impregnation ratio of 1.0. Models for predicting phosphate removal have been evolved. These models also incorporate operational variables such as the adsorbent particle size, initial adsorbate concentration, adsorbent dose, contact time etc., and manifest high values of the correlation coefficients.
引用
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页码:313 / 324
页数:12
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