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1.1ԓ�S늳��a(ch��n)�еďUˮ��Ҫ��Դ��늳��a(ch��n)��ϴ�{�ϵďUˮ;�{(di��o)��{��О�©��ˎ��Uˮ;��ϴ��a(ch��n)��ďUˮ��Uˮ��ÿ��s250��300t,��Uˮ��ؽ��x�ӳ��^��S�ŷŘ�(bi��o)��(zh��n)�ױ��ʮ��,��

1.2�Uˮ��ˇ

1.2.1��Ҫ��

(1)��(j��ng)��ˮ�|(zh��)Ҫ��_(d��)��V�|ʡ�V�ݏUˮ��ŷŵ�DB4437-90��(bi��o)��(zh��n)��һ��(j��)�ŷŘ�(bi��o)��(zh��n)��
(2)̎��^��a(ch��n)��Á��ƴu,��(du��)�h(hu��n)��(hu��)��Ⱦ,��

1.2.2��ˇ��ԭ��
��(j��)�Uˮ�к��ؽ��x�ӵķN��ķ��M(j��n)��̎��,�,��]��ɚ��׿��ƣ��ҏU��,��x��ɚ��Ĺ�ˇ,��

�׷N��Ҫ��x��c��õĉA��|(zh��)Na2CO3��Ca(OH)2,��NaOH�Ļ��W(xu��)��(y��ng)ʽ��:
Zn2++2OH-Zn(OH)2↓
Mn2++2OH-Mn(OH)2↓
Hg2++2OH-Hg(OH)2↓

��ɵ��@Щ��ͨ��y�ܵ��|(zh��),��ˮ�е��ݶȷe��1��С��W(xu��)��(y��ng)ʽ��ܶȷe��ӉA��|(zh��)��ؽ��x�ӝ�ȵķ��ǿ��е�,��

�Uˮ��ˇ��̼��Ҫ�O(sh��)��

�Uˮ��ˇ��û��,��FeCl3��pH�{(di��o)��NaOH,��Ҫ�O(sh��)��锇��,��б�ܳ��أ��ʽ��V�C(j��)�Լ��(y��ng)��ˎ�ͼ�ˎϵ�y(t��ng),��ˇ��D1��ʾ,��

��ۼ��Ӱ푻��F(tu��n)��Ч�ʵ��P(gu��n)�I�O(sh��)�䣬��(j��ng)ԇ�(y��n)�_��Ҫ�O(sh��)Ӌ(j��)��(sh��):��۵Ĕ��r(sh��)�g��25min,��蘪ĩ�˾��ٶȞ�1.2m/s,��w��ȫ��С��ٶȞ�2.9×10-5m/s��600mg/L,��Uˮ̎��400m3/d,��(j��)��(sh��)Ӌ(j��)��۵��Ч�w�e��7m3��~ֱ݆��1m,��D(zhu��n)��23r/min,��ص�ƽ��e��30m2��ߴ��7.15m×4.20m,��

1.2.4��ˇ��^��

��Ɨl��:ˮ��14��16m3/h,��F(xi��n)eCl3��0.3��0.4kg/(m3ˮ)��pH��8.5��8.7,��ڼ��г،��Uˮ��,��ďUˮ�ñó��Ӌ(j��)�ۣ��(j��ng)Ӌ(j��)��ďUˮ�Ԅ�(d��ng)��딇��,��FeCl3,��Ԅ�(d��ng)��ۣ��ڻ��ۃ�(n��i)�ӉAҺ,��ؽ��x��ɚ��,��^��w��Ȼ��Ԅ�(d��ng)��б�ܳ��M(j��n)�й�Һ��x,��ˮ��б��ϲ��ŷ�,��(j��ng)��ďUˮ�_(d��)��ŷŘ�(bi��o)��(zh��n)(��2)��w��M(j��n)��A�භ,��gЪ��ñó��ʽ��V�C(j��),��(j��ng)��V��ĞVҺ��ֱ��ŷš��l(f��)�F(xi��n)��,��t�ɷ��ˮ��г�,��ٴ��M(j��n)��,��c偠tú��Ϻ��ƴu��

�Y(ji��)��cӑՓ

��ˇ��(j��ng)�^3��\(y��n)��,��ˇ�^�̷�(w��n)��,��{(di��o)�ط��㣬�ŷ�ˮ��ˮ�|(zh��)�_(d��)��ˏV�|ʡ�V�ݏUˮ��ŷŵ�DB4437-90һ��(j��)�ŷŘ�(bi��o)��(zh��n),��늳؏Uˮ��ˇ��Ч��\(y��n)��Ҫ�c��pHֵ,��ď�(qi��ng)�ȵ��P(gu��n),��F(xi��n)�քeӑՓ��,��

2.1pHֵ�cˮ��ؽ��x�Ӻ��P(gu��n)��

��ؽ��x��cOH-�Ļ��W(xu��)��(y��ng)ʽ��仯��ܶȷe��Uˮ�е��ؽ��x��ܷ��޶ȵĳ�ȥ,��ȡ�Q��@Щ��x��ܷ��޶ȵ��y�ܵĚ��Ｐ�@Щ��ܷ�(w��n)��,��@Щ��c�Uˮ��pHֵ��P(gu��n)��˴_��pHֵ,��M(j��n)��˲�ͬpHֵ�c�Uˮ��Zn2+,��Mn2+��Hg2+�x�Ӻ��P(gu��n)ϵ��ԇ�(y��n),��pH��6.8�r(sh��),��Zn2+��Mn2+,��Hg2+��քe��65.0,��4.5��0.056mg/L,��Y(ji��)��D2��ʾ,��

�ɈD2��֪��pH��8.0�r(sh��),��Zn2+,��Mn2+��ˮ�еĺ��^�ߡ��S��pHֵ��,��京��u׃�ͣ��pH��9.0�r(sh��),��Zn2+,��Mn2+��քe��0.10��0.15mg/L,��.pHֵ�^�m(x��)��,��Zn2+��Mn2+�x�ӷ��u��,��(d��ng)pH��11.0�r(sh��),��Zn2+,��Mn2+�x�Ӻ��ӵ�5.0��3.0mg/L,��a(ch��n)��@�N��r��ԭ��Zn2+,��Mn2+�x�ӵĚ��OH-�x�ӝ��^��r��(y��ng)��λ��x��Zn(OH)-3��Mn(OH)-3��.�@Щ�x�ӵ��ܶȷe�քe��3×10-3��1×10-5,��f��ܽ��,��ʹˮҺ�е�Zn2+��Mn2+��,��Hg2+�x�Ӳ��@�N��|(zh��),��京��^�鷀(w��n)��

ԇ�(y��n)�Y(ji��)��,��pHֵ��8.5��8.7�^��m��,��һ��汣�C�ˏUˮ�н��x�Ӻ��_(d��)��ŷŘ�(bi��o)��(zh��n)��ͬ�r(sh��)pHֵҲ��ŷ�Ҫ��,��

2.2��Ӱ�

��NaOH��턩,��(d��ng)�ؽ��x�Ӻ��^�͕r(sh��)��ɵĚ��z��,��ڔ��(d��ng)��(d��ng)�^��@Щ�z��΢��(x��)��w��,��ʹ��O��y��ԇ�(y��n)��,��m��Ļ��@�ظ��@�N��r,��(d��ng)�Uˮ��Zn2+��Mn2+,��Hg2+�x�ӿ��20.0��80.0mg/L�r(sh��),��ÿm3�Uˮ��300��400gFeCl3��@�Ľ��ͼ�(x��)�w��ĺ��,��

2.3��ٶȵ�Ӱ�

�ڻ��^��M(j��n)��m��(d��ng)��,��Hʹ��ӵ�NaOHѸ�ٷ�ɢ��ؽ��x��cOH-�x�ӷ��(y��ng)��ɚ��,��w��g��ײ�C(j��)��(hu��),��ʹ΢��ۺͷ�ɢͬ�r(sh��)�l(f��)��ٶ��^��,��{�~�ͼ��D(zhu��n)��ˮ��܌��Y(ji��)��ι̵��w��ɼ�(x��)΢�w��,��ʹ�w��ĳ��׃�ú��y��,��m�˵Ĕ��菊(qi��ng)��w��,��߳��ص�Ч�ʡ�

3�Y(ji��)Փ

(1)��Zn2+,��Mn2+,��Hg2+�x�ӵ�늳��a(ch��n)�Uˮ��Բ��NaOH��x�ӳ��턩��pH�{(di��o)��,��F(xi��n)eCl3��x�ӵĺ��_(d��)��ŷŘ�(bi��o)��(zh��n),��
(2)��NaOH��턩��γɵ�΢��(x��)�w��ٶ��,��˲��б�ܳ��ؿ��@��ߏUˮ̎��p��̎��,��
(3)��Փ��ďUˮ��ˇ�^�̷�(w��n)��,��ڲ��h(hu��n)��l(w��i)��,��늳؏S�Uˮ��m�˷��,��

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