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Adsorption of 2,4-dinitrophenol and 2,4-dichlorophenol on Cationic Surfactant modified red soil
Authors:Liao?Min  author-information"  >  author-information__contact u-icon-before"  >  mailto:liaomin@zju.edu.cn"   title="  liaomin@zju.edu.cn"   itemprop="  email"   data-track="  click"   data-track-action="  Email author"   data-track-label="  "  >Email author
Affiliation:(1) College of Environmental and Resource Sciences, Department of Resources Science, Zhejiang University, 310029 Hangzhou, China
Abstract:Adsorption isotherms of 2,4-dinitrophenol and 2,4-dichlorophenol on hexadecyltrimethylammonium (HDTMA) bromide modified red soil under different ionic strength, divalent cation Cu 2+ or different pH conditions were studied. All the adsorption isotherms were well fitted to the Freundlich equation. The adsorption capacities of 2,4-dinitrophenol or 2,4-dichlorophenol were dramatically enhanced by HDTMA treatment of red soil. The increase of ionic strength and the addition of divalent heavy metal cation Cu 2+ significantly enhanced the adsorption of 2,4-dinitrophenol or 2,4-dichlorophenol on the HDTMA-modified red soil. Adsorption capacities of HDTMA-modified red soil for 2,4-dinitrophenol and 2,4-dichlorophenol gradually increased with decreasing pH in the aqueous phase.
Keywords:dinitrophenol  2  4-dichlorophenol  adsorption  cationic surfactant  red soil
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