Selective Extraction of Manganese using Moringa oleifera Seeds as Bioadsorbent

被引：1
|
作者：
do Carmo, Sange A. Nascimento [1 ]
de Sousa Neto, Jose Alistor [2 ]
Alves, Vanessa Nunes [2 ]
Coelho, Luciana Melo [2 ]
Melo Coelho, Nivia Maria [1 ]
机构：
[1] Univ Uberlandia, Inst Quim, Av Joao Naves Avila 2121, BR-38400902 Uberlandia, MG, Brazil
[2] Univ Goias, Dept Quim, Av Dr Lamartine Pinto de Avelar 1120, BR-75704020 Catalao, Go, Brazil
来源：
BRAZILIAN JOURNAL OF ANALYTICAL CHEMISTRY | 2019年 / 6卷 / 24期
关键词：
manganese; selective extraction; Moringa oleifera; AQUEOUS-SOLUTION; BIOSORPTION; ADSORPTION; REMOVAL; IONS; EQUILIBRIUM; SPECIATION; CU(II); ZN(II); MN(II);
D O I：
10.30744/brjac.2179-3425.AR-10-2019
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The adsorption of manganese onto Moringa oleifera seeds was optimized as a function of pH, adsorbent mass, particle size and contact time in aqueous solutions in batch tests. The results show that the optimized conditions for manganese adsorption were: pH 3.0, particle size <= 180 mu m, adsorbent mass 1.0 g and contact time 15 min. Varying the pH allowed the separation of the manganese species, the seeds selectively retained Mn(II) while Mn(VII) remained free in solution. Around 60% of the Mn(II) was removed at an initial pH of 3.0 with a manganese concentration of 4 mg L-1. The adsorption process was evaluated through adsorption isotherms and kinetics studies. The maximum adsorption capacity for Mn(II) was 10.35 mg g(-1). The isotherm followed the Langmuir model and the adsorption kinetics followed a pseudo-second-order kinetic model.
引用
收藏
页码：27 / 37
页数：11
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