�F̿΢늽ⷨ̎��ퟟ�S��͏Uˮ�l��(y��u)��

��r�g��2014-10-23 10:25 ��Դ��V�ݻ�� : ��x��1772

�ퟟ�S�Ľ��͏Uˮ��,��Ҫ��Ⱦ��ǑҸ��ЙC��|(zh��)��Uˮ�еĹ��w�Ҹ��Ҫ�ǟ��~,��z��ϵȼӹ��ퟟ�r�Ě��,��⣬�Uˮ��߀��S��z�w�Ե��Ⱦ���Ŷ�(��A),��(��)��ʮ��N��|(zh��)��,��Uˮ��ɫ�ȸߣ�CODCrֵ��,��,��y��c��(j��ng)̎��ֱ��ŷ�,��o�h(hu��n)��(y��n)�ص�Σ��͏Uˮ̎��Ҫ��ﻯ̎��,��̎��Լ��N̎��ˇ�Y(ji��)��̎��ȷ��,��΢늽��һ�N��͵�ˮ̎��g(sh��)��u��(n��i)��ҕ,��е��о��΢늽ⷽ��͏UˮCOD,��ɫ��Լ��õ�Ч��о��F̿΢늽ⷽ��̎��ퟟ�S��͏Uˮ,��˲�ͬ��،�̎��Ч��Ӱ�,��ԓUˮ��_��(bi��o)�ŷ��ṩһ�l��µ�;��

1��򞷽��

��͏Uˮˮ��ϡጼs1300��,��˕r,��ˮ�ӵ�CODCr��t��⛷�(GB11914-89)�y��z��޷��(n��i)��Ͳ��ȡ50mLϡጺõďUˮ�ӵ��100mL�Č��F��ƿ��,��m��NaCl,��һ��Fe��C��HCl�{(di��o)��(ji��)ˮ�ӵ�pHֵ,��Ȼ��Ô��跴��(y��ng)һ��ĕr�g;(ͨ�^ǰ�ڵ�һϵ�М�(zh��n)�䌍��µČ��l��:��Fe�|(zh��)��̶��20g/L,��NaCl��200mg/L��ң�pHֵ��3��,��跴��(y��ng)�r�g��30min),��(y��ng)��NaOH�{(di��o)��(ji��)ˮ�ӵ�pH��10��,��˕rˮ��Һ�г��F(xi��n)ī�Gɫ��,��ձó�V;�y��̎��ˮ��CODCrֵ��Ӌ��ȥ��,��

2�Y(ji��)��

2.1�F̿�Ȍ�CODCrȥ��ʵ�Ӱ�

��(y��ng)�l��׃,��Ȼ��cͶ��200mg/L��pHֵ��3,��r�g��30min,��F��Ͷ��̶��20g/L��ڲ�ͬ��F̿��(Fe��C=5��1��4��1,��3��1,��2��1��1��1,��1��2,��1��3��1��4,��1��5)�l��M�з��(y��ng),��y��ˮ��CODCrֵ��Ӌ��CODCr��ȥ��,��Y(ji��)��Ҋ��1,��

�Ɍ��Y(ji��)��֪��Fe��׃�r��S��Fe��C��ֵ�Ľ��,��CODCr��ȥ��ʴ��w��,��(d��ng)Fe��C=1��3�r��ȥ��Ч��,��@�N�F(xi��n)��ԭ��ܞ鮔(d��ng)ˮ��Fe�ĺ��̶��r,��һ��ķ��C��΢늽��wϵ�е�ԭ늳صĔ�(sh��)��,��˿��ߌ��ЙC��ȥ��;��(d��ng)�wϵ��C�ĺ��^��r,��C�ڷ��(y��ng)�п��ܕ��ã��ȥ��CODCr��ܱ�΢늽ⷴ��(y��ng)ȥ��CODCr��,��ԭ늳ص�늘O�ϵĻ��W(xu��)��(y��ng),��(d��o)�Uˮ��COD��ȥ��Ч��ڿ��w�Ͻ��;��C�w��һ�N��ԵĲ��ϣ��Fe�к�,��H��cFe�γ�ԭ늳�,��ˮ�е��Ⱦ�߀��ʹFe֮�g��һ��ľ��x,��һ��g��܉��Mԭ늳ط��(y��ng),��ǣ��C�Ĕ�(sh��)��̫��,��F(xi��n)e֮�g��g��̫��,��΢늽�ϵ�y(t��ng)��γɣ�Ӱ�̎��Ч��,��

2.2pHֵ��CODCrȥ��ʵ�Ӱ�

��(y��ng)�l��׃,��F̿�|(zh��)��Ȟ�1��3��Ȼ��cͶ��200mg/L,��r�g��30min,��ڲ�ͬ��pHֵ(1,��2��3,��4,��5)��M�з��(y��ng)��y��ˮ�ӵ�CODCrֵ,��Ӌ��CODCrȥ��,��Y(ji��)��Ҋ�D1��

�ɈD1��֪,��(d��ng)pH��2�rCODCr��ȥ��,��pH��2��ܵ�ԭ��pHֵ�^С�r,��(y��ng)�wϵ̎��ԭh(hu��n)��,��ˮ��S��H+��Mϵ�y(t��ng)�еķ��(y��ng)��ͬ�r,��H+��Եėl��µõ��ɂ�e,��γ��ڷ��(y��ng)�кܻ��S��B(t��i)��H��,��H�ݿ��Ժͽ��ˮ��е�һЩ�ЙC��Ⱦ��|(zh��)��(y��ng),��Ķ��ЙC��|(zh��)�Ļ��F�Y(ji��)��(g��u)��Ɖ��ʹ֮?d��ng)�朣�ʹ�ЙC��|(zh��)�l(f��)��׃,��(d��o)��CODCrȥ��^��;pHֵ�^С�r,��F(xi��n)e��C֮�g��λ��󣬏Ķ��ӿ�늘O�l(f��)��(y��ng)��,��Ʒ��(y��ng)��ȥ��Ч��;΢늽��wϵ��pHƫС�ĭh(hu��n)��б��^��^��Fe2+,��MFe2+��ã��̎��Ч��;��F̿΢늽��wϵ��pHֵ�^С��ϵ�y(t��ng)��,��F늽��,��ǣ��pH̫��,��H��ӿ�Fe�ĸ��g�ٶ�,��F(xi��n)e�ĺ��M��󣬶��{(di��o)��(ji��)pHֵ�rҪ�ô��,��HCl�ēp��Ҳ��,��^�Ͳ��á�ͬ�r,��Uˮ�ﺬ��̫��,��͕��ښ��F��γɣ��F��Õ��,��ں��m(x��)�Ļ��,��

2.3�Ȼ��cͶ��CODCrȥ��ʵ�Ӱ�

��(y��ng)�l��׃,��F̿�|(zh��)��Ȟ�1��3��pHֵ��2,��r�g��30min,��ڲ�ͬ��Ȼ��cͶ��(100��200,��300,��400��500mg/L)��M�з��(y��ng),��y��ˮ��CODCrֵ,��Ӌ��CODCr��ȥ��ʣ��Y(ji��)��Ҋ�D2,��

�ɈD2��֪,��(d��ng)�Ȼ��cͶ��200mg/L�r��CODCr��ȥ��,��c��͵�ȥ��ʲ�e��,��Ȼ��c��F̿΢늽�ķ��(y��ng)�wϵ��Ҫ��o��ã��Ȼ��c��ӷ��(y��ng)�wϵ�е�늽��|(zh��),��Һ�Č�(d��o)��,��Mԭ늳ص��γɡ�

2.4��跴��(y��ng)�r�g��CODCrȥ��ʵ�Ӱ�

��(y��ng)�l��׃,��F̿�|(zh��)��Ȟ�1��3,��pHֵ��2��Ȼ��cͶ��200mg/L,��ڲ�ͬ�Ĕ��跴��(y��ng)�r�g(10,��20��30,��45,��60��75,��90,��120min)��M�з��(y��ng)��y��ˮ��CODCrֵ,��Ӌ��CODCrȥ��,��Y(ji��)��Ҋ�D3��

�ɈD3��֪,��S��r�g��,��CODCr��ȥ��u��ߣ��(d��ng)45min�r�_��ֵ,��S��跴��(y��ng)�r�g��L,��F(xi��n)e��ˮ��ĕr�g��ֽ��|,��ˮ��еĸ��N��(y��ng)Ҳ��Գ�ֵ��M�У�F(xi��n)e��C��ܺܺõذl(f��)�]��Ե��,��ȥ��ˮ��е��ЙC��,��ǣ��跴��(y��ng)�r�g̫�L,��ˮ��аl(f��)��ĸ��N��(y��ng)��һ��ƽ��ϵ��(sh��),��ԟo�޵ذl(f��)չ��ȥ��,��ϵ�y(t��ng)�M��һ��r�g�ķ��(y��ng)�Ժ�,��CODCr��ȥ��ʎ׺��׃��څ��ƽ��(w��n),��,��跴��(y��ng)�r�g�^�L��H��̎��Ч�ʣ�߀��Fe��,��ʹ̎��M��,��Ҳ��ڌ��H��Б�(y��ng)�á�

2.5��ԇ��O(sh��)Ӌ

��ԇ��O(sh��)Ӌ��,��ƌW(xu��)��x�д��Ե�ԇ�l��,��Ō��M�̣��һ�N��،��M�з��ĿƌW(xu��),��Ч�ķ��,��ԇ��O(sh��)Ӌ��ڜp��ԇ�Δ�(sh��)��r�±��Cԇ�Ŀ��,��F̿΢늽�̎��r(n��ng)ˎ��g�w�Uˮ��ԇ��O(sh��)Ӌ��(sh��)��(j��)Ҋ��2,��

��ԇ�Y(ji��)��:

(1)��(j��)�ϱ��֪:��@��ԇ��У��Ă�Ӱ��صĸ��ˮƽ��3��ֵ��,��ֵ��,��(sh��)��(j��)�f��F̿΢늽ⷨ̎��ퟟ�S�Ľ��͏Uˮ��їl��M��:Fe��C��1��3;NaCl��Ͷ��200mg/L;pHֵ��2;��跴��(y��ng)�r�g��45min,��(j��)��Փ��,��@��(y��ng)�l��̎��ퟟ�S�Ľ��͏Uˮ��ȥ��CODCr��Ч��(y��ng)ԓ��Ѡ�B(t��i),��

(2)ͨ�^��صķ��M�б��^:Fe��C,��pHֵ��NaCl��Ͷ��,��跴��(y��ng)�r�g�@��еķ��քe��5.22%,��10.97%��3.54%��1.33%,��ɴ˿�֪:�ڱ�ԇ��,��pHֵ��̎��Ч��Ӱ��,��Fe��C��NaCl,��跴��(y��ng)�r�g��Ӱ��С,��

(3)��ԇ��O(sh��)Ӌ��ֿ��]��Ӱ�CODCrȥ��Ч��Ă��Ҫ��ص��ã��C�ϲ��ȫ��u��˸��ˇ��(sh��),��ͨ�^��O(sh��)Ӌ,��Կ˷��΂��صĲ��ƣ��ְl(f��)�]�˸��ˇ��(sh��)��(li��n)��,��ʹ�F̼΢늽ⷨ̎��ퟟ�S�Ľ��͏Uˮ�rCODCrȥ��Ч��_��Ѡ�B(t��i),��

��ԇ�Ĕ�(sh��)��(j��)��֪:��їl��Fe��C=1��3��NaCl��Ͷ��200mg/L,��pH��2,��跴��(y��ng)�r�g��45min��ԓ�l��̎��ퟟ�S�Ľ��͏Uˮ,��M��Mƽ�Ќ��,��y��@��ˮ�ӵ�CODCrֵ��Ӌ��ȥ��,��Ķ��Cԓ�l��Ƿ��,��򞔵(sh��)��(j��)Ҋ��3��

�ɱ�3��֪,��@��Mƽ�Ќ��CODCrȥ��ʵ�ƽ��ֵ��81.26%,��ĽY(ji��)��,��O(sh��)Ӌ�ó��Ѳ��l��,��F̼΢늽�̎��ퟟ�S��͏Uˮ��їl��

3.�Y(ji��)Փ

ͨ�^��ԇ�,��õ��ʹCODCrȥ��ߵ��їl��:�F̿�Ȟ�1��3,��pHֵ��2��Ȼ��cͶ��200mg/L,��r�g��45min,��ԓ�l��£��͏Uˮ��CODCrȥ��,��_��81.26%,��ڏUˮ��A(y��)̎��f��@�ӵ�ȥ��Ч��^��,��

�F̿΢늽�̎��͏Uˮ��õ�̎��Ч��,��y��ďUˮ��(j��ng)�F̿΢늽⹤ˇ̎��CODCr��󽵵ͣ��ں��m(x��)��̎��Ч��,��

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