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��r(sh��)�g��2014-07-17 10:09 ��(l��i)Դ��h(hu��n)��̌W(xu��)��(b��o) ��: ��x��2050

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�x��r(ji��)��ʯ, ��Ȼ��F��(du��)��,��о��F��Ժ��ʯ��(du��)�R��,��Y(ji��)��,��Ȼ��F��ȡ��r(sh��)�g,��ʼ�R��Լ��ضȵ��،�(du��)�R��Ӱ��^��,��Һ��ʼpHӰ푲��@��ڳ�ʼ�R��50 mg/L,��pH 6.8��5%�Ȼ��F��Ժ��ʯͶ��2 g/L,��90 min, �ض�35��,��_(d��)21.6 mg/g��ʯ��(du��)��R��о��_��,��Һ�ĳ�ʼpHֵ��3.1��10.1��r(sh��)��Һ��KpHֵ��8��8.5��IMS��R�Ƿş��^(gu��)��,��Ժ��ʯ�ȱ��e��,��u��(sh��)��,��(d��o)��(qi��ng)��ͨ�^(gu��)XRD�V�D��δ�l(f��)�F(xi��n)�F��w�Ĵ��,��

Ӣ��ժҪ:

Inexpensive sepiolite was sampled and modified by FeCl₃. Properties on biosorption of antimony by iron modified sepiolite were studied. It is shown that factors such as FeCl₃ concentration, adsorption time, antimony initial concentration, temperature, etc. affect adsorption process significantly, and the effect of initial pH is not obvious. Antimony adsorption capacity is 21.6 mg/g while the adsorption conditions are as follows: antimony initial concentration 50 mg/L, pH 6.8, 5% FeCl₃ concentration��immobilized bimass concentration 2 g/L, temperature 35��, adsorption time 90 min. Sepiolite exhibits a strong buffering capacity, it takes a few minutes for a sepiolite suspension adjusted to pH 3.1��10.1 to attain its natural pH of 8��8.5. The process of adsorption produces heat. After modification the surface area of IMS increases obviously, and from the FTIR data we can find the surface –OH uptakes increases greatly too, which may be the reason for high adsorption capacity. The iron crystals are not found on IMS by XRD.

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