�ֹ��ȷ��y��I(y��)�Uˮ��COD�ķ��M(j��n)

��r(sh��)�g��2012-11-16 23:27 ��Դ��㽭�� : ��x��1519

ժҪ:��W(xu��)��(chemical oxygen demand,��QCOD)�Ǳ��ˮ�w��ЙC(j��)��Ⱦ�̶ȵ�һ�(xi��ng)��Ҫָ��(bi��o)��(sh��)�(y��n)��΢��ֹ��ȷ��y��Uˮ��COD,��Ӱ표y��Uˮ��COD��M(j��n)��о�,��_��P(gu��n)�Č�(sh��)�(y��n)�l��,��(sh��)�(y��n)�Y(ji��)��,�c��y(t��ng)��t��⛷��,��,��,�Y(ji��)��ɿ��

�P(gu��n)�I�~:�ֹ��ȷ�,�Uˮ,��W(xu��)��

COD ��ˮ��ЙC(j��)��Ⱦ�̶ȵı��ָ��(bi��o),��һ�(xi��ng)��Ҫ��ЙC(j��)��Ⱦ�C��ָ��(bi��o),��ѽ�(j��ng)�V��(y��ng)�õ��h(hu��n)��O(ji��n)�y��a(ch��n)��,��Ⱦ�O(ji��n)�صȸ��(g��)�I(l��ng)��,��Ҫ��ǣ��S��˂��h(hu��n)��R(sh��)�ļӏ�(qi��ng)�Լ��҇��Ⱦ��ŷſ��ָ��(bi��o)�Ĵ_��,��ЙC(j��)��Ⱦ�ęz�y�@��Ȟ��Ҫ�,��F(xi��n)�� COD �Ę�(bi��o)��(zh��n)��t��⛷�[1]��˷��Ч��^��,��جF(xi��n)�Ժ�,��Y(ji��)��ɿ��ܱ��^��(zh��n)�_�ķ�ӳˮ�w��ЙC(j��)�ﺬ��,��ĕr(sh��)�L,��ɱ��^�ߡ��y�� COD ��Ў��[2],��{�׶��-��i��⛅f(xi��)ͬ��߻��wϵ��[3],��V��[4]�ȣ�Jeris �� H2SO4-H3PO4�� y ��COD[5],�� Ag2SO4��߻��,��ɱ��^��,��O�� Mn(H2PO4)2��߻��y�� COD[6],��r(sh��)�g�s�̞� 25min,��Բ��Â��y(t��ng)�Ļ��r(sh��)�g��^�L,�� H2SO4-H3PO4��Һ��,�� K2Cr2O7��MnSO4��߻��,��΢��⹤�I(y��)�Uˮ��ˮ,��r(sh��)�g�s�̞� 7min�� y��ˮ�w�е� CODֵ,��ȡ��^�õĽY(ji��)��,��

1 ��(sh��)�(y��n)��

1.1 �x��ԇ��

VIS-7220 �ͷֹ��Ӌ(j��)��ڶ��W(xu��)�x��S��PHS-3C ��Ӌ(j��) ��Ϻ��ͤ��· 149 ̖(h��o)�״Ńx��S��,��ƽ��Ϻ��ܿƌW(xu��)�x��޹�˾��,��΢��x��Ϻ��x΢��W(xu��)�Ƽ��޹�˾��K2Cr2O7��AR��,��MnSO4•5H2O��CP��,��AR��⛣�GR��,��̼��£�AR��,��oˮ�Ҵ�(AR)��HgSO4(CP),��(AR),��(AR)��I(y��)�Uˮ��Դ��ؐ��l(f��)��Ʒ�ɷ��޹�˾��,��ˮ��Դ��S��o(h��)�Ǻӣ�,��K2Cr2O7��Һ��Qȡ�A(y��)�� 120�� 2h �Ļ��(zh��n)ԇ�� K2Cr2O70.7355g �ܽ⣬ �� 500mL ��ƿ,��ϡ��̶�,��u�򣬂��,��

Ԕ��(x��)��(n��i)��Ո�鿴��֣�

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