Removal of chromium and lead from aqueous solution using industrial wastes: batch and column studies

被引：3

作者：

Tiadi, N. ^{[1
]}

Mohanty, A. ^{[2
]}

Mohanty, C. R. ^{[1
]}

机构：

[1] Veer Surendra Sai Univ Technol, Dept Civil Engn, Burla 768018, Odisha, India

[2] IIIT Bhubaneswar, Dept Elect & Elect Engn, Bhubaneswar 751013, Orissa, India

来源：

DESALINATION AND WATER TREATMENT | 2018年 / 101卷

关键词：

Adsorption; Dolochar; Heavy metals; Isotherms; Column study; Breakthrough curve; HEXAVALENT CHROMIUM; ADSORPTION; WATER; CR(VI); CARBON; ADSORBENT;

D O I：

10.5004/dwt.2018.21732

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The rotary kiln waste (dolochar) generated in sponge iron plants has been converted into a low-cost adsorbent by heat activation for the removal of chromium and lead from aqueous solution. The effects of particle size, contact time, sorbent dosage, adsorbate concentration, pH and temperature on the sorption of both the metal ions were studied in batch experiments. Kinetic studies were also conducted to have an idea on the sorption mechanism of the process. The uptake of lead was found to be more than that of chromium. Adsorption on dolochar followed Freundlich isotherm. The kinetics of the Cr(VI) and Pb(II) adsorption on the kiln waste was found to follow a pseudo-second-order rate equation. It was observed that the sorption process was spontaneous and the adsorbent is suitable for sorption of both ions. In addition, fixed bed studies were performed to simulate real-life conditions. The experiments were also performed to regenerate the column by 0.2 N HNO3 for lead-dolochar system and 0.5 M NaOH for chromium-dolochar system for reuse.

引用

页码：223 / 231

页数：9

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