期刊论文

中文

安全与环境学报

1009-6094

2016

16

6

193-199

10.13637/j.issn.1009-6094.2016.06.038

国家环境保护公益性行业科研专项（201309051） 广西环保专项

本校为第一机构

探讨了不同粒径的表层沉积物对镉(Cd~(2 +))和铊(Tl~+)的单一、竞争吸附-解吸特性,并通过对吸附前后沉积物颗粒进行红外光谱和X-光电子能谱分析,探讨了其吸附机理。结果表明,重金属吸附量均随溶液初始质量浓度增加而增大,且随沉积物粒径增大而减小;吸附率随初始质量浓度增加而减小。沉积物对Cd~(2 +)的吸附量高于Tl~+,且Cd~(2 +)和Tl~+的吸附等温线均符合Langmuir和Freundlich吸附模型。重金属解吸量随吸附量增加而呈指数增加趋势。当重金属Cd~(2 +)和Tl~+共存时,各吸附量均有不同程度的下降,而解吸率略高于单一环境。红外光谱分析表明,沉积物中羟基与羧基均参与了Cd~(2 +)和Tl~+的吸附; X-射线...

This paper takes it as its target to investigate the adsorptive mechanism of cadmium(Cd~(2 +)) and thallium(Tl~+) by the sediments in Hejiang River. For this purpose,we have taken the surface sediments of Hejiang River,Guangxi,as a case study sample,when the contaminant accident by heavy metal Cd~(2 +) and Tl~+ residuals. In doing so,we have done an investigation with the single and competitive adsorption-desorption simulation of Cd~(2 +) and Tl~+ by the surface sediments with different particle sizes in hoping to find the adsorption mechanisms through Fourier transform infrared spectroscopy(F...