�Ƹ﹤�I(y��)��Cr3+�Ļ��ԇ�(y��n)

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1,��ԇ�(y��n)��

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�ڳ��ԇ�(y��n)�͌�(du��)��ԇ�(y��n)��ʹ�õ��ˮ��Cr3+��|(zh��)��Ⱦ��1000mg/L,��r(ji��)�t�}��sˮ��ƶ��,��ڌ�(du��)��ԇ�(y��n)�У��ַքe��Fe3+,��AL3+,��Ca2+��Mg2+,��õ��ĽY(ji��)��c��κ��(y��ng)�x�ӵ��ˮ��Cr3+��Y(ji��)��^��u(p��ng)�r(ji��)��ȡҺ��ڵ�Fe3+,��Al3+��Ca2+,��Mg2+,��(du��)Cr3+��^(gu��)�̵�Ӱ푡�

2,��Cr3+��

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2Cr(OH)2++3H2O2+8OH-→2CrO42-+8H2O

��?y��n)��pH=10�ėl��,��Cr3+��Cr(OH)2+�j(lu��)��ʽ��,��⣬��(y��ng)��Cr3+��|(zh��)��h(yu��n)�h(yu��n)��ԓ��B(t��i)�µ���ܽ��,��ԕ�(hu��)��Cr3+��|(zh��)��,��ʹ��ʾ��Ҫ��L(zh��ng)��(y��ng)�r(sh��)�g��߷��(y��ng)�ضȡ�

�ڳ��ԇ�(y��n)��ȡ�õĔ�(sh��)��(j��)��A(ch��)�ϣ��҂��θ=60��,��t=30min,��pH=10��R=1.5�鷴��(y��ng)�Ļ��l��(du��)��ȡҺ�е�Cr3+�M(j��n)��ԇ�(y��n),��ԓ��(y��ng)�l��H�@��60%��,��ǣ��M(j��n)һ��ԇ�(y��n)��n(H2O2)�cn(Cr3+)�ı�ֵR,��ȡ��^�ߵ��,��P(gu��n)ԇ�(y��n)�Y(ji��)��Ҋ(ji��n)��3��

��˽��ȡ��ͬ��ʵ�ǰ��,��ڌ�(du��)��ȡҺ��^(gu��)��Ҫ�^��H2O2Ͷ�ӱ�R��ԭ��,��҂��(du��)��ȡҺ��Fe3+��Al3+,��Ca2+,��Mg2+��(du��)��M(j��n)�̵�Ӱ��ˌ�(du��)��ԇ�(y��n)��Y(ji��)��l(f��)�F(xi��n)��Fe2+��Mg2+�Ĵ��ǌ�(d��o)��^(gu��)��H2O2Ͷ�ӱ��^(gu��)�ߵ��Ҫ��,��{(di��o)��(ji��)��ȡҺ��PH�^(gu��)��,��F(xi��n)e2+��Mg2+�܉��Cr2+�γɱ��^�y�ܽ��ĳ�N�j(lu��)��ʹ��(g��)��M(j��n)�̜p��,��(d��o)��Ͷ�ӱ��^��,��

�ڲ�ͬ��n(Fe2++Mg2+)/n(Cr3+)ֵ(N)�Լ��ò�ͬRֵ��r�£�Cr3+��ʵ�ԇ�(y��n)�Y(ji��)��Ҋ(ji��n)��4,��4�е�ԇ�(y��n)��(sh��)��(j��)��(du��)��^(gu��)�̾��к��Ҫ��x,��҂��Ը��(j��)��Ҫȡ�õ��Լ��ȡҺ�е�Nֵ�_��H2O2��Ͷ�ӱ�R��

3,��x�ӵ�ȥ��

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4,��Cr�Ļ��

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Cr2O72-+3SO2+11H2O→2Cr(OH)(H2O)5SO4+SO42-

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5,��Y(ji��)Փ

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��ͨ�^(gu��)ԓ��,��Cr�Ŀ��ʿ��_(d��)��80%��ϡ�

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