Adsorption of toxic Cr(VI) ions from aqueous solution by sulphuric acid modified Strychnos potatorum seeds in batch and column studies

被引：23
|
作者：
Anbalagan, K. [1 ]
Kumar, P. Senthil [2 ]
Karthikeyan, R. [3 ]
机构：
[1] SRM Univ, Dept Chem Engn, Madras 600033, Tamil Nadu, India
[2] SSN Coll Engn, Dept Chem Engn, Madras 603110, Tamil Nadu, India
[3] Anjalai Ammal Mahalingam Engn Coll, Dept Chem Engn, Kovilvenni 614403, India
来源：
DESALINATION AND WATER TREATMENT | 2016年 / 57卷 / 27期
关键词：
Cr(VI) ions; Isotherms; Desorption; Kinetics; Thermodynamics; Thomas model; MODIFIED AGRICULTURAL WASTE; CASHEW NUT SHELL; FIXED-BED COLUMN; HEXAVALENT CHROMIUM; THERMODYNAMIC ANALYSIS; TREATED SAWDUST; ZINC(II) IONS; PB(II) IONS; METAL-IONS; COIR PITH;
D O I：
10.1080/19443994.2015.1049965
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A new low-cost adsorbent such as sulphuric acid modified Strychnos potatorum seeds (SMSP) was employed for the removal of toxic Cr(VI) ions from aqueous solution in batch and column modes. Results showed that the removal of Cr(VI) ions could be effectively removed with the SMSP in batch operation. Adsorption of Cr(VI) ions onto SMSP followed the pseudo-first-order and Redlich-Peterson models in batch operation and Thomas model in column operation. Adsorption was more favourable at acidic pH of 2.0 with the maximum monolayer adsorption capacity of 202.7mg/g. NaOH was a better desorbing agent with the recovery of 93.245% of Cr(VI) ions. Column studies were optimized with various parameters such as bed height (2-10cm), Cr(VI) ions concentration (50-250mg/L) and flow rate (5-25mL/min). According to the fact that SMSP-based adsorption process could be a promising technology for the removal of Cr(VI) ions from wastewaters.
引用
收藏
页码：12585 / 12607
页数：23
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