REMOVAL OF CHROMIUM (VI) FROM AQUEOUS SOLUTION BY EXTRACTED ONION PROCESSING WASTE

被引：0
|
作者：
Prokopov, Tsvetko, V [1 ]
Nikolova, Milena, I [1 ]
Taneva, Donka S. [1 ]
Petkova, Nadezhda T. [2 ]
机构：
[1] Univ Food Technol, Dept Environm Engn, 26 Maritsa Blvd, Plovdiv 4000, Bulgaria
[2] Univ Food Technol, Dept Organ & Inorgan Chem, 26 Maritsa Blvd, Plovdiv 4000, Bulgaria
来源：
SCIENTIFIC STUDY AND RESEARCH-CHEMISTRY AND CHEMICAL ENGINEERING BIOTECHNOLOGY FOOD INDUSTRY | 2021年 / 22卷 / 04期
关键词：
chromium; isotherms; kinetics; onion; removal; waste; water; HEAVY-METALS; BY-PRODUCTS; II IONS; ADSORPTION; BIOSORPTION; CR(VI); VALORIZATION; EQUILIBRIUM; BIOSORBENT; QUERCETIN;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The aim of the present study was to examine the performance of residue from extracted onion processing waste for the ability to remove Cr (VI) ions from aqueous solutions. The characterization of applied biosorbent was conducted by FT-IR analysis. Batch experiments were carried out and the effects of different adsorption process parameters were determined. Maximum removal efficiency of 98.29 +/- 0.17 % was obtained at pH = 1.0, adsorbent dose 0.5 g. L-1, initial Cr (VI) concentration 50 mg. L-1, temperature 25.0 +/- 0.5 degrees C, agitation speed 200 rpm and contact time of 30 min. The pseudo-second order model and Langmuir model provided the best fit to experimental kinetics and equilibrium isotherm data, respectively. Based on the values determined for the maximum adsorption capacity (q(max) = 47.17 mg.g(-1)) the extracted onion processing waste could be applied as a low cost biosorbent for removal of Cr (VI) ions from polluted water.
引用
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页码：399 / 410
页数：12
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