�僺��t�UҺ��ľC��

��r(sh��)�g��2009-09-18 12:08 ��Դ�� : ��x��3473

��僺��t�ϻ��UҺ�к��|(zh��)��ߣ��ɷ֏�(f��)�s,��ھC��֮ǰ��(y��ng)��(du��)��N�UҺ�M(j��n)�ІΪ�(d��)�ͷ��̎��,��(du��)��\�g��Һ��~�g��Һ��X늽⒁��Һ��A�{(di��o)��(ji��)pH,��(du��)��x�ӽ��Q��֬��ֻ�茢��׃?y��u)�Na2CrO4��,��

1 ��t��a(ch��n)�t�\�c

�ڸߜ؉A�ԗl��|(zh��)Na2CrO4��r(ji��)�t�ɱ��՚��Na2Cr2O7,��ͬ�r(sh��)��F��\��D(zhu��n)��(y��ng)�Ŀ��}NaFeO2,��Na2ZnO2.��ˮ��ȡ�A��w�r(sh��),��󲿷��F�ֽ��Fe��OH��3��ȥ��VҺ�ữ��pH<4,��Na2CrO4��D(zhu��n)׃?y��u)�Na2Cr2O7,��Na2SO4�cNa2Cr2O7�ܽ�Ȳ��քe�Y(ji��)��,��øߜ؉A��t��Ƽt�\�c�ėl��n��Na2CO3��n��Cr2O3��=3.0��1.0,��ض�780�棬�r(sh��)�g2.5h,��t��D(zhu��n)��85%��,��

2 ��a(ch��n)�t�S

��ü��A��턩ȥ��像UҺ�е��s�|(zh��)��x�ӣ��Ã��像UҺ��ּt�\�c��a(ch��n)�U�t�S,��Һ��Na2CO3�Һ��,��{(di��o)��pH��8.5��9.5.�M(j��n)��^�V��VҺ��,��ډA�ԗl��V��е�Cr3+��H2O2��Cr6+,��ٽ�(j��ng)�^�V��VҺ�c��VҺ��,��VҺ�c��U��Һ��,��50��60�淴��(y��ng)1h,��Ȼ��(j��ng)�^�V��ˮϴ,��ϴȥ�ȸ�,��Լ��ֿ��s�|(zh��)��ٽ�(j��ng)��鼴�ó�Ʒ�U�t�S,��像UҺ��a(ch��n)�U�t�S,��H��Q��Ⱦ��}��ʹ�像UҺ�е��t�õ��˻��,��(j��)��,��̎��像UҺ200t��ƽ��18t�t�\�c,��Ɍ�(sh��)�F(xi��n)�ꄓ(chu��ng)��4�f(w��n)��Ԫ,��Ч��^��

3 ��a(ch��n)Һ�w�t��Ƥ��Aʽ��t

��t�UҺ��Ú��cȥ��x��s�|(zh��),��pH=5.5��6.0,��Ȼ��^�V��VҺ��,��F��w�o��̎��,��Ȼ��ڞVҺ��Ͷ��߀ԭ��,��ʹNa2Cr2O7߀ԭ��Cr��OH��SO4,��100��l��£��M(j��n)һ��ۺ�,��(d��ng)�A�Ȟ�40%�r(sh��),��ʽ��4Cr��OH��3.3Cr2��SO4��3��t��,��ӱ�ʡ�o�O�hĳƤ��S��僺��t�Uˮ��a(ch��n)Һ�w�t��,��ÿ��a(ch��n)5tҺ�w�t��ÿ��ɵ��(r��n)��6000��Ԫ,�,��Ҋ��ú��t�UҺ��a(ch��n)�t��Ľ�(j��ng)��(j��)Ч��ʮ��@��ġ��,��Ɍ��t��c̼�ۻ��,��ڸߜ��џ��Ķ��Ƶý��t.��?y��n)麬�t��܇�g��ҪƷ�N,��(j��)��̎��ͬ,��Ļ��Ҳ��ͬ.늽ⷨ��ࣺ

��1��М�׃�Q�߻��ԭ�ϣ�

��2��F�t�t��ϵ�ԭ��,��

��W(xu��)��ࣺ

��1��՚��t,��

��2��t��,��F��w��Բ��ϵ�ԭ�ϵȵȡ�

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