沙柳活性炭纤维改性及其对铅离子的吸附性能

doi:10.11896/j.issn.1005-023X.2018.14.007

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Abstract The modified adsorbent originated from salix psammophila activated carbon fibers were prepared by nitric acid oxidation treatment, and the difference in structure and performance were analyzed with the help of fourier infrared spectrum, scanning electron microscopy (SEM) and other methods between the modified and initial adsorbent. The influence of pH on adsorption effect, the difference of fitting results based on two adsorption isotherm models and two adsorption kinetic models and the adsorption properties of recycling was investigated, respectively, in the test of removing lead ion from sewage. The results showed that fibers whole morphology of modified adsorbent has not been changed, compared with initial adsorbent, oxygen-containing functional groups and micropores were increased on the surface. With the increase of pH values, the adsorption capacity and adsorption rate of lead ions of modified adsorbent were greater than the unmodified activated carbon, and the adsorption process were reasonably described by Langmuir isotherm model and pseudo second order kinetic. In addition, the modified activated carbon fibers has excellent cyclic perfor-mance.

Key words： salix psammophila activated carbon fiber modification adsorption cyclic performance

Published: 31 July 2018

CLC number:

TQ424.1+4

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	LI Yan
	WANG Xin
	HUANG Jintian

Cite this article:

LI Yan,WANG Xin,HUANG Jintian. Modification of Salix Psammophila Activated Carbon Fibers and Adsorption Properties of Lead Ion[J]. Materials Reports, 2018, 32(14): 2360-2365.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.14.007 OR http://www.mater-rep.com/EN/Y2018/V32/I14/2360

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