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首页> 外文期刊>Journal of water chemistry and technology >The Impact of Surface Properties of Modified Pine Bark on the Mechanism of Sorption of Heavy Metals from Aqueous Media
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The Impact of Surface Properties of Modified Pine Bark on the Mechanism of Sorption of Heavy Metals from Aqueous Media

机译:改性松树皮的表面性质对水介质中重金属吸附机理的影响

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摘要

The surface properties of pine bark before and after the treatment with urea solution and the adsorption of Cu(II), Ni(II) and Zn(II) from aqueous solutions at different pH values have been studied. Types of active sorption sites, their surface concentration and change after the bark treatment with urea solution were determined. The results of potentiometric titration were processed by using ProtoFit and FITEQL software programs. The data obtained make it possible to conclude that in the extraction mechanism of heavy metals from water the share of ion exchange decreases and the share of complexation increases. The impact of alkaline and alkaline earth metals in the range of their concentrations up to 3000 mg/dm(3) on Cu(II) extraction from model aqueous solutions was also investigated.
机译:研究了尿素溶液处理前后松树皮的表面性质以及不同pH值下水溶液对Cu(II),Ni(II)和Zn(II)的吸附。确定了活性吸附位点的类型,表面浓度以及尿素溶液经树皮处理后的变化。电位滴定的结果通过ProtoFit和FITEQL软件程序进行处理。获得的数据可以得出结论,在从水中萃取重金属的机理中,离子交换的份额减少,而络合的份额增加。还研究了碱金属和碱土金属的浓度范围高达3000 mg / dm(3)对从模型水溶液中提取Cu(II)的影响。

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