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��r(sh��)�g��2014-07-15 10:45 ��Դ��h(hu��n)��̌W(xu��)��(b��o) ��: ��x��1742

��ժҪ:

�ؽ��ُUˮ��(du��)�h(hu��n)��Ⱦ�ѽ�(j��ng)��ˆT�ďV��P(gu��n)ע,��Է�ú�Һ�ˮ��ԭ�ϡ��ӻ��Գɷ�FeS,�Ƃ�һ�N��ں��ؽ��Cu²⁺,��Zn²⁺,��Pb²⁺�ďUˮ̎��̽ӑ��ȼ��B(y��ng)�r(sh��)�g��(du��)��Ͳ��(qi��ng)�ȼ��ȱ��e��Ӱ�;�о��˹�Һ��,��|�r(sh��)�g,��pH��ضȼ��ʼ��Һ��ȵ��،�(du��)Cu²⁺��Zn²⁺,��Pb²⁺�x�Ӄ��Ч��Ӱ�Ҏ(gu��)��,��(du��)��(sh��)�(y��n)�Y(ji��)��M(j��n)��˵Ȝؾ��M��,��XRD��@ʾ,��д��Ca(OH)₂��C—S—H,��FeS�ȵV��,��(du��)�ؽ��x�Ӿ��зǳ��õĹ̶��,��ԓ��(du��)�ؽ��x�Ӿ��кܺõ�ȥ��Ч��,�߂��^�õđ�(y��ng)��ǰ��

Ӣ��ժҪ:

Environmental pollution from heavy metals contamination has attracted more and more attention from researchers and engineers. A novel non-sintered ceramsite was prepared using coal fly ash and cement as raw materials and FeS as the activating agent to treat the wastewaters contaminated by Cu²⁺, Zn²⁺ and Pb²⁺. The effects of materials ratio and steaming time on the ceramsite intensity and specific surface area were investigated, and the effects of five major factors (solid/liquid ratio, contact time, pH value, temperature and initial concentration) on the removal efficiency of heavy metals (Cu²⁺, Zn²⁺ and Pb²⁺) were examined in detail. The experimental results fitted the adsorption isotherm according to Langmuir and Freundlich models. The XRD analyses demonstrated that new crystal minerals such as Ca(OH)₂, C—S—H and FeS emerged in the non-sintered ceramsite, which was helpful to remove the heavy metals. This non-sintered ceramsite presented good performance on the removal of heavy metals and good application prospect can be expected in the future.

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