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ơ�ƏS��a(ch��n)�Uˮ��д��,��K��đҸ��,��Ժܲ�,��ɴ�Uˮ��Ҫ��ء�ơ�ƏS̎��Uˮ��̎��ˇ��ԭ��(��˴��}��к͉A��|(zh��)) ��д��x��, һ��300mg/L ��,��(j��)ơ�ƏS̎��ǰ��Uˮˮ�|(zh��)��c,�ڌ��Uˮ�M�бO(ji��n)�y��r,��횲�ȡ��Ŀ��Ʒ�ʽ,��

1 �P(gu��n)�I��—��Ʒ�Ĵ��

��Ҫ�O(ji��n)�y��ˮ�ӘO��(�؄e��̎��ǰˮ��),Ҫ��õ��ʴ_��COD(��W(xu��)��) �O(ji��n)�y�Y(ji��)��, �P(gu��n)�I��ȡ��Ҫ�д��ԡ��Ҫע��c,��

1.1 ��uˮ��

��̎��ǰ�Uˮ��̎��ˮ�Ĝy��,ȡ��ǰ��(y��ng)��ƿ��o��u,ʹ��ˮ��е��,��K��Ҹ��M��ɢ�_, �Ա��ȡ��^��򡣌��ˮ��M��COD �y��r�l(f��)�F(xi��n), ��u��ˮ�ӵĜy��Y(ji��)��׳��F(xi��n)�^��ƫ��, �f��ȡ��^�д��,��

1.2 ˮ�ӓu��ȡ��

��ڏUˮ�к��д��đҸ��,��u��󲻿��ȡ��, �Ҹ��ܿ��³�,��ȡ�ӵ��Һ��ژ�ƿ��ϡ��,��²�ͬλ��ȡ�õ�ˮ�ӝ��,�؄e�ǑҸ��ĽM�ɕ��һ��,��ܴ��ԓ�Uˮ��H��r,�y�õĽY(ji��)��Ҳ�]�д��,��u��ȡ��, �mȻ��u�a(ch��n)��˚��(��ȡˮ�ӵ��^��в��֚��ݕ��ɢ),ȡ�ӵ��w�e��ݵĴ��ڶ��ڽ^��ϴ��һ�c�`��,��@�c�^��ϵĜp��ķ��`��c��Ʒ��ԵĲ��ɵ��`��ȿ��Ժ��Բ�Ӌ��u�Ӻ��ò�ͬ�r�g��ˮ��c�u�Ӻ��ȡ�ӷ��Ĝy��Ռ��l(f��)�F(xi��n),ǰ�ߜy��ĽY(ji��)��c��Hˮ�|(zh��)��r��^��ƫ��,��

1.3 ȡ��̫��

ȡ��̫��,�Uˮ�؄e��̎��ǰ�Uˮ��ĳ�N��(d��o)�¸ߺ��w��ֲ��ܿ��ȡ��, �@�Ӝy��COD �Y(ji��)��c��H�Uˮ��ܴ�,��ͬһ��Ʒ��2.00,��10.00�� 20.00,��50.00ml ȡ��ͬ�ȗl��y��, �l(f��)�F(xi��n)ȡ2.00ml ̎��ǰ�Uˮ��K��ˮ��y��COD �Y(ji��)��c��Hˮ�|(zh��)��, �y(t��ng)Ӌ��(sh��)��(j��)��Ҏ(gu��)��Ҳ�ܲ�;ȡ10.00,��20.00mlˮ�Ӝy��ĽY(ji��)��Ҏ(gu��)��Դ��и��;ȡ50.00mL ˮ�Ӝy��COD �Y(ji��)��Ҏ(gu��)��Էǳ��á�

��Ԍ��COD ��^��̎��ǰ�Uˮ��(y��ng)һζ��Üp��ȡ��ķ��ȥ�M��y��t��⛼��ζ�Һ��ȵ�Ҫ��,��(y��ng)ԓ�ڱ��C��Ʒ��ȡ��,�г�ִ��Ե�ǰ��ȥ�{(di��o)��t��⛵ļ��ζ�Һ�ĝ�ȁ�M��Ʒ��ˮ�|(zh��)��Ҫ��,�@�Ӝy��Ĕ�(sh��)��(j��)�Ŝʴ_,��

�ڴ�Ҫ�؄eָ��, һЩ��C O D �y��xȡ��ֻ�Ў׺��,�ڜy��@�ˮ�ӕr��̫��m,��

1.4 ��Һ��,��̶Ⱦ�

��ˮ��БҸ��һ�㶼��Һ�ܵĳ��ڹܿڏ�,��Ø˜��Һ��ȡ��Uˮ�ӕr, ˮ��еđҸ��ￂ�Ǻ��yȡ�ϡ��@�Ӝy��ֻ�ǲ��ȥ��Ҹ��ďUˮCOD ֵ,��һ��, ��ʹ��ȡ��һ��ּ�С�đҸ��,��Һ��̫С,ȡ�M�̶��Ҫ�ĕr�g�^�L, �Uˮ��ѓu��đҸ��u�³�, ��ȡ��Ҳ�ǘO��,��팍�Hˮ�|(zh��)��r��ˮ��,�@�Ӝy��ĽY(ji��)��ݱ��`��ܴ��ü��ڵ��Һ��ȡ��Uˮ��Ʒ�y��COD �o��y��_�ĽY(ji��)��,��ȡ��Uˮˮ��؄e��Ҹ��w��ˮ�ӕr,һ��Ҫ��Һ��ԼӸ��,��׿ڏ��Ӵ�,ʹ�Ҹ��Կ��,�ٌ��̶Ⱦ��M��У��, ʹ�y��ӷ��,��

��ʡվ��Ӗ(x��n)��˕rʡվ��(y��ng)�Ę˶��^��Ͳ��ȡ����ˮ��, ��(j��ng)�҂��ԇ��ڲ��ˮ��, �˷�Ч��^�á�

1.5 ʹ��Ȼ��F(xi��n)��(sh��)��(j��)��ܶȲ�

Ч��Õr,��ʹ�ó��x��ˮ��,��(j��)�Y��@ʾ��x��Uˮ, ơ�ƏS�Uˮ��Ч��ܺ�,��

2 �{(di��o)��t��⛘˜��Һ�ĝ�Ȼ��

�ژ˜�C O D ��, ��t��⛝��һ��0.25mo1/L,�ژ�Ʒ�y��r�ļ�� 10.00ml,�Uˮȡ��20.00ml,��Uˮ�� COD ��^�ߕr,һ��ȡ��Ʒ��ϡጘ�Ʒ�ķ��M��ϗl��ơ��̎��Uˮ��COD �^��,��10.00ml ��Ȟ�0.25mo1/L ��t��⛘˜��Һ�r, ��^��,��˕r��(y��ng)�m��{(di��o)��t��⛘˜��Һ�ĝ�Ȼ��,��ʹ��(y��ng)��Һ��ʣ��t��m��,��l(f��)�F(xi��n),��t��⛝�Ƚ��͵�0.025mo1/L �r,��ĵζ��K�c��^��,ɫ׃��@��,��Ԍ�COD �^С��̎��ˮ,��h�Ý�Ȟ�0.05mo1/L ��t��⛘˜��Һ;��ڸߝ�ȵ�̎��ǰ�Uˮ�Ý�Ȟ�0.5mol/L ��t��⛘˜��Һ,�m��?sh��)��{(di��o)��ʹ��Ʒ�ĵζ��w�e�c�ζ��հ׵��w�e��@��Ĳ�p��

3 �{(di��o)��ζ�Һ��၆�F��˜��Һ�ĝ��

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��၆�F�X��Ӌ�㹫ʽ��

C_{[(NH4) 2Fe(S04)2]}=0.250 × 10.00/V_{[ (NH4)2Fe(S04)2]}

��၆�F��Ȟ�0.lmol/L �r,10.00ml, 0.25mol/L ��t��һ�c��,��ζ��၆�F��w�e��25.00ml;��t��⛱��Ʒ�е�߀ԭ��|(zh��)��һ��r,��၆�F��ĵζ��w�e��12.50mL��Ĝp�ٷ��ζ��`��ĽǶȁ��, ��(y��ng)ʹ�ζ��w�e��2 0 - 50ml ��,��˽��h��၆�F��{(di��o)��Դ��0.05mol/L (��С��0.05mol/1,�հ��၆�F�X��w�e��ڵζ��ܵ��ݷe50.00ml,��ʼ�c�ͽK�c��Ҫ�x��(sh��)�ɴ�,��Ӵ��`��),��һ��0.055mol/L ��ˡ��@��ʹ�ζ��հ׵��w�e��45ml ��,ʹ��Ʒ��w�e�c�ζ��w�e�^��m��,��

4 �{(di��o)��ṯ��

��͏Uˮ�O(ji��n)�y��İ��J��ʹ�� 0.4 ��ṯ�j(lu��)��x�ӵ��_40mg,��x�ӝ��^��,��ټ��ṯ,��ṯ: ��x��=10:1(ָ��),��ڹ��Є��,��(y��ng)�M��,��(j��)��۵��о��ṯ��x�ӵı��(y��ng)��20: 1 ��ȫ�j(lu��)��x�ӡ�ơ�ƏS̎��Uˮ��x�Ӻ��һ�㲻��^500mg/l,��(j��)��攵(sh��)��(j��)��һ��0.2g ��ṯ��,��

�C��,��ơ�ƏS�Uˮ�M�бO(ji��n)�y��, ��P(gu��n)�I�Ŀ��ǘ�Ʒ�Ĵ��,�粻�ܱ��C�@һ�c,��Ӱ�ˮ�|(zh��)��Ե��κ�һ��h(hu��n)��(ji��),��ɜy��Y(ji��)��e�`��(d��o)��e�`�ļ��g(sh��)�ԽY(ji��)Փ,��ͬ�r��̎��Uˮ��x�Ӻ��^��Ҫע��x�ӵĸɔ_��

��īI

[1] ��ҭh(hu��n)��o��ˮ�͏Uˮ�O(ji��n)�y��ί��.ˮ�͏Uˮ�O(ji��n)�y��(��İ�).

[2] κ��(f��)ʢ��.ˮ�͏Uˮ�O(ji��n)�y��ָ��.

[3] ��.CODcr �y��ṯȥ��x�Ӹɔ_��̽ӑ.��(n��i)�ɹŭh(hu��n)��o,2005(1).

����D(zhu��n)�d��ǳ��ڂ��f��Ϣ֮Ŀ��,��Ё�Դ��ע�e�`��ַ��ĺϷ��(qu��n)��,��Ո��߳֙�(qu��n)��C��c��W(w��ng)(li��n)ϵ��҂��r��,��h��,��x�x��