Removal of hexavalent chromium from contaminated water by adsorption using mango leaves (Mangifera indica)
Removal of hexavalent chromium from contaminated water by adsorption using mango leaves (Mangifera indica)
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DOI：
10.1080/19443994.2013.804458
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发表时间：
2014-03
影响因子：
1.1
通讯作者：
R. Saha;Bidyut Saha
中科院分区：
文献类型：
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作者：
R. Saha;Bidyut Saha
摘要本研究的目的是评估芒果叶粉尘从水溶液中吸收六价铬 Cr(VI) 的情况。采用间歇吸附程序来测试残留粉尘作为 Cr(VI) 吸附剂的能力（还原耦合吸附）。估计了各种参数对吸附的贡献，例如接触时间、山梨酸盐浓度、介质 pH 值和温度，在 pH 2.0 和温度 40°C 时，从污染水中吸收 Cr(VI) 的最大量为 250.23 mg g–1。从污染水中吸收的 Cr(VI) 遵循伪一级速率表达式。还对 ΔG0、ΔH0 和 ΔS0 进行了评估，得出的结论是吸附本质上是可行的、自发的和吸热的。该过程很好地遵循朗缪尔等温线。通过傅里叶变换红外（FTIR）技术检查了可能的吸附剂和金属离子相互作用的性质。 FTIR 光谱揭示了铬中细胞表面的 –OH、C=O、C–O 基团的参与...
AbstractThe objective of this study is to assess the uptake of hexavalent chromium Cr(VI) from aqueous solutions onto mango leave dust. Batch adsorption procedure is utilized to test the ability of leave dust as an adsorbent for Cr(VI) (reduction coupled adsorption). The contribution of various parameters on sorption, such as contact time, sorbate concentration, pH of the medium, and temperature, was estimated, and maximum uptake of Cr(VI) from contaminated water was 250.23 mg g–1 at pH 2.0 and temperature 40°C. Cr(VI) uptake from contaminated water followed the pseudo-first-order rate expression. ΔG0, ΔH0, and ΔS0 have also been evaluated, and it has been concluded that the sorption was feasible, spontaneous, and endothermic in nature. The process follows well Langmuir isotherm. The nature of the possible adsorbent and metal ion interactions was examined by the Fourier transform infra-red (FTIR) technique. FTIR spectroscopy revealed the involvement of –OH, C=O, C–O groups on the cell surfaces in chromium...