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MAP ��Magnesium Ammonium Phosphate��W(xu��)��Ļ��ԭ��򺬰��ďUˮ��V�}��}��(y��ng)��MAP ��@�V��,��a(ch��n)��Ļ��W(xu��)��ʽ�� MgNH4PO4·6H2O,��׷Q�B�Sʯ��о��,��MAP��Ч��ȥ��ʏS�Uˮ�еĸ߰��,��W(xu��)��鵪�ʏUˮ�ߝ�Ȱ��A(y��)̎�톖�}�ṩ��һ�N��е�;��,��

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Mg2+ + PO43- + NH4+ + 6H2O= MgNH4PO4 · 6H2O ��1��

Mg2+ + HPO42 - + NH4+ + 6H2O=MgNH4PO4 · 6H2O + H+��2��

Mg2+ + H2PO4- + NH4+ + 6H2O=MgNH4PO4 · 6H2O + 2H+��3��

Ks = ��Mg2 +�ݣ�NH4+�ݣ�PO43 -�� = 2.5 × 10- 13 ��4��

�ɷ��(y��ng)ʽ��2��3��֪,��ԇ��^��ˮ�ӵ� pH ֵ��½�,��μ� NaOH ��Һ�ɴ��M��2��3��ʽ��(y��ng)��M��,��

2 �Y(ji��)��ӑՓ

MAP�ǉA��},��ډA�ԗl��ܽ��SpHֵ��߶��͡��(d��ng)��ҺpHֵ>9.5�r,��Һ�а��x��׃�ɚ�B(t��i)��]�l(f��),��ͬ�r��Һ�е�Mg2+�cOH-��Mg��OH��2��,��(d��ng)��ҺpHֵ>11�r,��߀��ܽ�ȸ��͵�Mg��PO4��3��,��(d��ng)��ҺpHֵ<7�r��Һ�е�PO43-��ȵ�,��ڷ��(y��ng)��1��ʽ��M��,��ˣ��Ʒ��(y��ng)pHֵ��7.5��10֮�g,��ӑՓ��ȥ��ʵ�Ӱ�,��

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�ɷ��(y��ng)��1��ʽ��֪��MgNH4PO4·6H2O,��Փ��Mg2+:NH4+:PO43-��Ħ��ȑ�(y��ng)��1:1:1,��(j��)ͬ�x��Ч��(y��ng)��Mg2+,��PO43-��,��ɴ��M��1��ʽ��M�ж��߰��ȥ��ʡ��(j��ng)�о��Լ�ԇ��,��NH4+:PO43-��Ħ��<1,��mȻ��һ��̶��˰��ȥ��ʣ��(y��ng)��Ě��s��_�װ�mg/L,��µ��Ⱦ,��

��ˣ��_��Ч��a(ch��n)��Ⱦ,��(j��)��(y��ng)��W(xu��)ԭ��,��ڽ��}Ͷ�ӱ��ͬ�r��V�}��Ͷ��ȹ̶�Mg2+:NH4+��Ħ��Ȟ�1.5:1,��׃��}��Ͷ��,��(y��ng)��pHֵ��9.0��

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�ɱ�2֪,��(d��ng)��}��Ȟ�0.8��0.9�r,��ȥ��ʷքe��96.25%��99.25%��ˮ�İ��ȷքe��75mg/L��15mg/L,��քe��9.2mg/L��19.8mg/L,��̶�PO43-:NH4+��Ħ��Ȟ�0.9:1��׃�V�}��Ͷ��,��Ʒ��(y��ng)��pHֵ��9.0,��о��׃�V�}��Ͷ��ȥ��Ӱ푡�ԇ�Y(ji��)��3��ʾ,��

�Y(ji��)��,��V�}��Ͷ��Ч��߰��ȥ��,��(d��ng)�V�}��Ͷ�ӱ��1.5�r��Uˮ�İ��ȿ��Խ��100mg/L��¡�

3 ��

�ɷ��(y��ng)ʽ�Լ�ԇ�Y(ji��)��֪,��(y��ng)�a(ch��n)��Ļ��W(xu��)��ʽ��MgNH4PO4·6H2O,��w�ʰ�ɫ��w��ĩ���1.7,��,��ډA��MgNH4PO4·6H2O��245,��Փ��ÿ̎��1kg��,��Ҫ1.71kg�V��2.21kg��,��Լ�һ��NaOH��Һ,��ͬ�r��17.5kgMAP ��ᰱ�V��ֲ��L��N,��P,��Mg�I�B(y��ng)Ԫ�أ��B(y��ng)�ֱ��ܷʵ�ጷ��,��ʸ�,��ጷ�ʹ�ã��F(xi��n)�Ɵ��r,��о��Y��@ʾ,��MAP��Փ�r��198��330��Ԫ/��_�l(f��)MAP��ጷ��^�ߵĽ�(j��ng)��rֵ,��ͬ�r߀��Խ��͸ߝ�Ȱ��Uˮ��̎��M��,��

4 �Y(ji��)Փ

��1�� о��ǻ��ʏS��ʏUˮ��ȸ��_2000mg/L,��һ��﷨�y�Խ��,��Ҹߝ�Ȱ��ďUˮ߀��ֱ��Ӱ��b�õ��\�С,��W(xu��)�� MgNH4PO4·6H2O��,��Uˮ�а��ȥ��ʸ��_95%��ϣ��_��A(y��)̎��Ŀ��,��m(x��)��̎��춨�˻��A(ch��),��

��2�� о�� (d��ng)�� MgCl2·6H2O,��Na3PO4·12H2O̎��ԓ�Uˮ,��Mg2+:NH4+:PO43-��Ħ��Ȟ�1.5:1:0.9��pHֵ��9.0��,��ԭˮ�еİ��ȿ��2000mg/L��15mg/L,��20 mg/L,��

��3�� ɵ��ᰱ�V��ܽ⡢ጷ��ٶ��,��r(n��ng)��ʸ�,��h(hu��n)��ȾС��һ�N��Ѓrֵ�ľ�ጷ�,��ϵ��_�l(f��)��ÿ��Դ�󽵵͏Uˮ̎��M��,��^�ߵĽ�(j��ng)��rֵ��

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