Adsorption of copper(II), cadmium(II), nickel(II) and lead(II) from aqueous solution using biosorbents

Huan-Ping Chao; Chung-Cheng Chang

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Adsorption of copper(II), cadmium(II), nickel(II) and lead(II) from aqueous solution using biosorbents

机译：使用生物吸附剂从水溶液中吸附铜（II），镉（II），镍（II）和铅（II）

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Three types of agricultural waste, citrus maxima peel (CM), passion fruit shell (PF) and sugarcane bagasse (SB), were used to produce biosorbents for removing the heavy metal ions of copper(II), cadmium(II), nickel(II) and lead(II) from a pH 5.0 solution. The properties of biosorbents were characterized using scanning electron microscopy (SEM), zeta potential analyzer, Fourier transform infrared (FTIR) spectroscopy, elemental analyzer and tests of cation exchange capacity (CEC). The result indicated that the selected biosorbents possess rich carboxyl (COOH) and hydroxyl (OH) groups to produce a complexation with the heavy metals. Moreover, the negative surface charge of the biosorbent might adsorb the metal ions through the ion exchange. All of the adsorption isotherms indicated that L-type characters represented complexation and ion exchanges that were the adsorption mechanisms of biosorbents toward heavy metals. Biosorbents with higher oxygen content might generate high adsorption capacities. The adsorption capacities of CM and PF, estimated from the fitting to the Langmuir isotherm, are similar to those reported by others regarding biosorbents.

机译：三种类型的农业废料：柑桔皮（CM），百香果壳（PF）和甘蔗渣（SB）用于生产生物吸附剂，用于去除铜（II），镉（II）和镍（重金属）。 II）和来自pH 5.0溶液的铅（II）。使用扫描电子显微镜（SEM），ζ电位分析仪，傅立叶变换红外（FTIR）光谱，元素分析仪和阳离子交换容量（CEC）测试对生物吸附剂的特性进行了表征。结果表明，所选择的生物吸附剂具有丰富的羧基（COOH）和羟基（OH）基团，可与重金属发生络合。而且，生物吸附剂的负表面电荷可能通过离子交换吸附金属离子。所有的吸附等温线均表明L型特征代表络合和离子交换，这是生物吸附剂对重金属的吸附机理。含氧量较高的生物吸附剂可能会产生高吸附能力。根据对Langmuir等温线的拟合估计，CM和PF的吸附能力与其他人关于生物吸附剂的报道相似。

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来源
《Adsorption》 |2012年第6期|p.395-401|共7页
作者
Huan-Ping Chao; Chung-Cheng Chang;
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作者单位

Department of Bioenvironmental Engineering, Chung Yuan Christian University, Chung-Li, 32023, Taiwan, ROC;

Department of Civil Engineering, Chung Yuan Christian University, Chung-Li, 32023, Taiwan, ROC;

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正文语种 eng
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Heavy metal; Adsorption; Biosorbent; Agricultural waste; Functional group;

机译：重金属;吸附;生物吸附剂;农业废弃物;官能团;

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Adsorption of copper(II), cadmium(II), nickel(II) and lead(II) from aqueous solution using biosorbents

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