Abstract:Attapulgite was modified with the surfactant of hexadecyltrimethylammonium bromide (HDTMA-Br) by ultrasonic to obtain the organic-modified HDTMA-attapulgite. The HDTMA-attapulgite was characterized by scanning electron microscope (SEM), FT-IR spectroscopy (FT-IR) and thermogravimetry-differential scanning calorimetry (TG-DSC). The SEM images showed that attapulgite were well dispersed after ultrasonication. The FT-IR and TG-DSC analyses indicated that HDTMA were intercalated on the interlayered of attapulgaite. The kinetic reaction of hexachlorocyolohexane (HCH) adsorption on HDTMA-attapulgite fitted well with the pseudo-first-order kinetic model. The adsorption capacities of HCH on HDTMA-attapulgite were much higher than that on natural attapulgite because of existing synergistic adsorptive effect of the HDTMA organic phase with adsorption of HCH. The Langmuir, Freundlich and Linear isotherm equation models could not be used to describe the adsorption of HCH on HDTMA-attapulgite due to the existence of complex adsorption mechanisms.
刘总堂, 许敏, 卢再亮, 章钢娅, 靳伟. HDTMA-凹凸棒土的制备表征及其对HCH的吸附研究[J]. 中国环境科学, 2010, 30(12): 1602-1607.
LIU Zong-Tang, XU Min, LU Zai-Liang, ZHANG Gang-Ya, JIN Wei. Preparation and characterization of HDTMA-attapulgite and adsorption behavior to hexachlorocyolohexane. . CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(12): 1602-1607.