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1��鷨

1.1 �F�}�� FeCl3,��ˮ��Һ��ˮ��Fe(OH)3��|(zh��),��M�л��r��(A��5+)�ķ��Q��F�}��,��ԓ��һ��Ô��衢��,��^�V��r��(As5+),��ȥ��˷��m�˱��Ⱦ�ĵ��ˮԴ��ȥ��_6J,��

1.2 ��F��wϵ��鷨

��(j��)��W(xu��)��W(xu��)��늻��W(xu��)ԭ��,��Եó��(d��ng)1.O3≤pH≤5.35�r,��ˮ��r��(As)�c��r�F(Fe)�γ�FeAsO,t
����ڵ�pHֵ�ėl��,��ˮ��Һ�м��^��Ȼ��F(FeCL3)��Һ,��ʹˮ��Һ�е��x��F�x��γ��ܽ�Ⱥ�С��FeAsO4��c�^��F�x��γɵ�FeOOH�u��F,��ʹ��õ�ȥ��,��̎��^�͵��ˮ��ҵõ��F��ﶾ�Ե�,��W(xu��)��(w��n)��ԏ�,��a(ch��n)��ʵͣ��Ʒλ��,��M��ն��Ķ��Ⱦ,��

1.3 ��һ�ۺ��F��鷨 �þۺ��F��ȥ��ˮ�е��顣��ˮ��Һ�м��Һ,��ʹ��r��(As)��r��(As ),��@��r��}��r��}��ܽ��С��r��(As )�Ķ��Ա��r��(As)�Ķ��С,��֮��,��ۺ��F��Һ��,��ˮ�麬��ɵ��ˮ�˜�,��ҳ��֮��ˮ�еĳ��Կ��؏�(f��)ʹ�á��m�˵�pHֵ��6.5��8.5֮�g,��@һ��Һ��F�Ě��}�ĺ��δ��,��ɶ��Ⱦ��

1.4 ��F��}��鷨

��F��}��һ�N�๦��ˮ̎��G,��p��ˮ̎��,��Է��ô˷�ȡ��Ȼ��F�}��Ч��M��о�,��ԇ�Y(ji��)��,��F��}�c��ȱȞ�15��1.��pH��5.5��7.5��m�˵��r�g��10mLn,��r�g��30mLn,��̎��ˮ��隈��_��ˮ�˜ʣ��}�Ⱥ�Ӳ�Ȳ��ɔ_��^��,��c��y(t��ng)��F�}��F�}��,��F��}��麆�㣬��Ч,��o��Ⱦ,��ˮ��坍��,��L.ee�� ø��F��⛵ď��.�Ȍ�ˮ�е�As,��һ��As��,��m(x��)Ͷ��FeCL.��,��(d��ng)As һ��Fe�Ļ��W(xu��)Ӌ��Ȟ�3��2�r.�cFe“һ��(y��ng)��һ��(y��ng)��W(xu��)�� .��(2.0mg/L )��Դˮ,��Ͷ��Fe�~0.5��2mg/L ��FeCL,��̎��,��ˮ�_��ˮ�˜ʣ��Ȼ�ЙC��(NOM)�Ĵ��ڕ�Ӱ��ȥ��Ч��,��

1.5 ʯ��ܛ��

ʯ�ҳ��Ӳ��ˮ��ܛ��,��о��Ӳ��ˮ��Ҳ��^�ߵ��,��ˮ��(j��ng)�^ʯ��ܛ��,��Ҳ�ɵõ��Чȥ��,��ʯ��ܛ��ȥ��r��(As )��Ч��hС��ȥ��r��(As )��Ч��,��@��ȥ��^�̳��ؓ늺ɵ��}��ڎ��늺ɵ��|(zh��)��棬��}��H,��AsO,��ڴ��(sh��)��ˮ�w�С��ˮ��r��(As+)��r��(As )��,��l��ܸ��Ч��ȥ��ˮ�е��,��ʯ��ܛ��ͨ�^��ˮ�w��pHֵ(pH—L0)��̼��}�ĳ��,��Ү�(d��ng)ˮ��Mg �ĺ��͕ܵr,��ڌ��(ȥ��ʞ�42.5 )��Ү�(d��ng)pHֵ��1j��ҕr,��ˮ�w�д��Mg ��a(ch��n)��V��,��Ķ�ʹ��ȥ��_��(90%),��о�߀��ֻ��̼��}��ܛ��,��ֻ��ȥ��O��(6 ),��F��@��ȥ��(60 �� 9O )��

2 ��鷨

2.1 ��X��^�V��

��һ�N��κ;��w��X,��c�λ늺�ֵ��8.2,��ڽ��Һ�Ќ��S��x��H��,��j(lu��)�Ϻ��x�ӽ��Q��߻��X�ĳ��Ч�ʼ��,��ȼ��ˮ�{(di��o)��(ji��)��΢��,��pHֵ��5�r��ã�Ȼ��(d��ng)��]��r,��ˮ��pHֵ�{(di��o)��6��6.5֮�g,��M��^�V��m��҇��(sh��)��؅^(q��)��ˮ�|(zh��)�l��,��ô˷N��Ա��Cˮ�е��麬��ȫ��l(w��i)��˜�(o.05mg/L ��),��ÿ��(�s��830kg��)��o.4mm��1.2mm�Ļ��X��̎��4000��׵�ˮ֮�󣬿��M��,��Һ��x��1 �Ě��c��Һ,��V��w�e��4��ҡ��Ļ��X��؏�(f��)ʹ��,��

2.2 ��ʯ��鷨

��ú��ʯ��鼼�g(sh��),��ʯϵ��Ȼ�ǽ��ٵV��ϡ��o��,��o�к�Ԫ��,��Ч��Mһ��ˮ��|(zh��)��,��Ӱ푺��ʯ��Ч��Ҫ��У��Ȼ��ʯ�Ļ.δ��ĺ��ʯ��1mg/L ˮ��ȥ��̞�1 2.5 ,��ӆ1j��(j��ng)�^��ĺ��ʯ��lmg��/Lˮ��ȥ��ʿ��_��95%��,��̎��^��Ҫ��̎��ˮpH>6.0,��tȥ��Ч��Ƿ�ѡ��Õr�g,��Õr�g��^1h,��û��_��ƽ�⣬�˕r��ʷ�(w��n)��95 ��98 ֮�g,��ú��ʯ��̎��ˮ��,��F�}��ăr�B(t��i)��Ҫ�󡣺��ʯ��鷨�oՓ��r��߀��r��,��F(xi��n)��ͬ�Ӄ�(y��u)��ȥ��Ч��,��

2.3 ��ú�ҳ��鷨

��ú��һ�Nȼú�a(ch��n)��һ�N�ۉm��U����һ��ĹǼܽY(ji��)��(g��u)��΢��,��S��|(zh��)��һ��,��ô��c��_��ȥ��ˮ�w��Ŀ�� Ӱ�ԓ��Ч��Ҫ��У��ٷ�ú�ҵĸߜر��
��(j��ng)��ķ�ú�Ҍ��ȥ��c��Ĝض��P(gu��n)ϵ��,����ض�Խ��,��ȥ��Խ�ߡ��r�g��Ӱ�,��һ��r��,��ú�Һ��Õr�gԽ�L��ȥ��Խ��,��ͬ�ضȗl��»�ķ�ú��o��L�r�g,��K��Ч��ͬ�ġ��۷�ú�ҵļ��ȵ�Ӱ�,��ú��Խ��,��ȥ��Ч��Խ�á��֮��,��ӑB(t��i)��^��Լ��༉̎��ҲӰ푳��Ч��,��ú�ҳ��鷨��ԏU�ΏU��˼��ֵ�ý��b��Ҿ��й�ˇ��,��Դ�V��,��r��c��

2.4 ��F��鷨

ϡ��Ԫ�ص�ˮ��ϡ��}��^�ߵ��x�ӵ��,��ŵ��ˢ��һ�N��F�ϳɵ��ϡ��o�C��,��c��õĳ��V�ϻ��X�M��ƽ��^ԇ򞣬�Y(ji��)��,��X��pH ��3.5�� S.5,��8.6mgAs��F��pH�m�÷��V,��pH3��7�ķ��(n��i)��^�ߵĳ��Ч��,��_1 6.OmgAs·g��^�̲��Ӳ��,��}�Ⱥͷ��x�ӵĸɔ_,��ˮ��о��^��đ�(y��ng)��ǰ��

2.5 ��ϳ��鷨

��(j��)Cu(11)��Fe(L]1)��^��H��,��s�ɵ��Ƃ��ͬ�r��Cu(��)��Fe(111),��ôŷ��x��M�з��x��յĴ��CuFe ��M��о�,��Y(ji��)��,��ԓ��c��ҺpH��P(gu��n)��Լ��ԗl��,��.��As ��Ȍ�As һ��Щ��ƽ��Ȟ�10tLg/L1.�r.��_1H g/ g��,��Ժܷ��ӵ،�ˮ�Н�Ȟ�1��20m~/1 ��Asһ��101mg/L��,��ؓ�d��As ��^��׵��0.1mol/L NaOHϴÓ��,��ʹ��As,�� t�y��ϴÓ,��@�c2�N�r�B(t��i)��C��ͬ��P(gu��n)��

2.6 �d�F(��)һ��λ�w��Q��w�S��G��鷨

�Y(ji��)��λ�w��Q�c�Hˮ��w�S�صă�(y��u)�c,��w��Ƽ��O(sh��)Ӌ�ϳ��һ��d�F(��)һ��λ�w��Q��w�S��[Fe(Cl1],��ͨ�^�o�B(t��i)�̈́ӑB(t��i)��򞣬�о��ˮ��c�ͷ��c(��)(li��n)��ȥ��Ч��͝��ص�Ӱ��Լ��(j��ng)�^��(f��)��һϴÓ��һ��ܵķ�(w��n)��,��Y(ji��)��,��ԓ��܉��Ч��x��Ե�(li��n)��ȥ��<As )�͸߷�,����ɸ��_15mg/g��,��(f��)ʹ����w�e��˜�ƫ��С��0.5 ��̎��ˮ�ĸ��P(gu��n)ָ�˾��҇��ˮ�l(w��i)��˜�,��؄e��As һ��|(zh��)��ȵ��0.01Omg/l ,��罡��M��(WHO)��]��ˮ��˜ʡ��f��ԓ��ĵ؅^(q��)��кܺõđ�(y��ng)��ǰ��,��

3 �Y(ji��)�Z
(1)��,��ڌ�ʩ��c��,��߀��ͬ�rȥ��ˮ�е�A3+��A5+��ȱ�c��γɺ��U��,��Ɍ��h(hu��n)��Ⱦ��(d��ng)��ˮԴ�ĵ��ˮ��ˮ��^�˜�,��Ҫ��̎��_��ˮ�˜�Ҫ��r,��̎��ܝM��Ҫ��

(2)��̎��^�͵��ˮ�r,��̎��Ч�ʸ�,��ɔ_С��؄e��̎��}��,��ˮϵ,��؏�(f��)ʹ�ã��h(hu��n)��ɶ��Ⱦ,��ȱ�c�Ǵ��Õr�g�L,��̎��M��^�ߵȆ��}��S��ϿƌW(xu��)�Ĳ��l(f��)չ��ˮ�˜��څ��Ҫ��,��Ч�r��ĳ��ϱ،��ɞ��պ��ˮ��܊,��

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