新型凹凸棒土颗粒吸附剂对亚甲基蓝和刚果红的吸附研究

利用海藻酸钠和氯化钙的凝胶化,包埋制备有机凹凸棒土颗粒(GOAT)吸附剂,通过批量实验考察了制备的吸附剂对水中亚甲基蓝(MB)、刚果红(CR)的吸附行为。实验结果表明,GOAT对MB和CR的吸附行为都更符合准二级吸附动力学方程,吸附等温线符合Langumir方程。吸附量的大小与溶液的初始p H值有关,且增加盐浓度,GOAT的吸附能力增加。

Adsorption Properties of Novel Attapulgite Granular Adsorbent for Methylene Blue and Congo Red Removal

In this paper ,the granule organo -attapulgite adsorbent (GOAT ) was prepared by the sol-gel transition prop-erty of sodium alginate and calcium chloride .The adsorption of methylene blue(MB)and Congo red(CR) from aqueous solu-tion onto GOAT was investigated using batch experiment .The results revealed that adsorption of MB and CR to GOAT fitted well with the pseudo -second order kinetics equation ,adsorption isotherm fitted better with the Langmuir model .The initial pH value of the solution had significant impact on the amount of adsorption ,and the adsorption capacity of the modified saw-dust increased with the increase of salt concentration .