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��r�g��2008-09-16 14:51 ��Դ�� : ��x��2828

        �軯�c��軯��ǃ�(y��u)��僽j�τ�,��軯��僵��н�,��y��~,��\��k��,��ɫ@�úܸ��|(zh��)��僌ӣ��軯��Є��,��˵��0.3mg/kg,��҇��ڴ��ᳫ�ßo��價�ˇ��溬��價�ˇ��Ŀǰ��Ҫ��Įa(ch��n)Ʒ��價�ˇ��,��a(ch��n)Ʒ��ѸĞ�o��價�ˇ,��S�u�價��I(y��)�@�ĺ��Uˮ��Ҫ��y��M��]·ѭ�h(hu��n)��Ưϴ��ˇ,��p�ٺ��Uˮ��ŷ��,��Uˮ�t��(j��)�軯��ԣ��ö��M��̎��,��õ�ˎ��NaClO,��Ca (ClO) ₂��Һ��,��,��Һ�Ⱥͳ��ڃr��ߵ�ԭ�򲻳��á��^��˵�Ca(ClO) ₂�֕��a(ch��n)�� Ca (OH) 2 �� CaSO₄��,��,��ʲ�� NaClO �Ǻ��m��ˎ��

        ԓ��ډA�ԗl��,�� NaClO ��x��x��Լ��c��x�ӽj�ϵ��x��ɵ��Ͷ��̼,��x�ӵ��Ɖķփɂ��A�Σ��һ�A��,��ډA�ԗl��(pH ≥10)��,��x��}��ڶ��A��,�� pH �� 7��8�ėl��,��}�Mһ��ɵ��Ͷ��̼��

        ��һ�A��鲻��ȫ��,��ʽ(1) ,��(2) ,��(3) ��

        NaCN + NaClO + H2O = CNCl-+ 2NaOH (1)
        2NaCu (CN) ₂+ 5NaClO + NaOH + H₂O =4NaCNO + 5NaCl + 2Cu(OH) ₂ ↓ (2)(ʽ�е��~Ԫ��Ҳ��y��\��)
        CNCl+ 2NaOH = NaCNO + NaCl + H₂O (3)

        ��r��c�c��Ͷ�ӱȞ飺 CN^-��NaOCl = 1��2. 85,��ƏUˮ��pHֵ��12��13,��ضȞ�15�桫90��,��r�g��30min��Uˮ��(j��ng)��һ�A��̎��,��軯��D(zhu��n)��},��䶾�Խ��͞�NaCN ��ǧ��֮һ��ʱ��M�еڶ��A�ε��̎��,��_��ŷ�,��ڶ��A��ȫ��ʽ(4) ,��(5) ��

        2NaCNO + 3HOCl = 2NaCl + H₂O + 2CO₂ ↑+ N₂↑(4)
        4NaCNO + 3NaClO + 2H₂O =4CO₂ ↑+ 2N₂ ↑+ 4NaOH + 6NaCl (5)

        ��r��c�c��Ͷ�ӱȞ飺

        CN^-��NaOCl = 1��3.42,��ϡ��яUˮ pH ֵ�{(di��o)��8. 5��9. 0��ضȞ�15��40��,��r�g�s��30min,��ڶ��A��̎��ǰ��}�Bͬ��һ�A��µĚ��Ȼ��һ��ɟo��CO₂ ��N₂,��

        ��價��I(y��)�@��Uˮ��ŷ��󣬿�ֻ��һ��,��ڷ��мәCе��,��B�m(x��)ʽ̎��Ğ��gЪʽ̎��ͬһ��Ȱ��һ�A�ε�̎��Ͷ�Ӵ��c�M��,��30min��׃��l��,��ڶ��A�ε�̎��Ͷ�Ӵ��c�M��ȫ��ʾ��D��D2,��