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ԇ򞲿��

1.1 ԇ ��

�׻��ϩ��(2,��3-�h(hu��n)��)��;��軯��;��仯�;2��3,��4-��ױ�;BPO,��

��ˮҺ��90.50 %��As2O3��ƣ��1��As2O3�ĽM��|(zh��)��֔�(sh��),��

1.2 ��Ϙ�֬��Ƃ�

�о��к��Ϙ�֬��Ƃ��Լ׻��ϩ��(2,��3-�h(hu��n)��)��ԭ��軯�@�ļ״��Һ��Ƴɼ׻��ϩ��(2��3-�h(hu��n)��)��,��Ȼ��,��ھۺϸ��2��2,��4-��ױ��ϡጄ�,��BPO��l(f��)��Ҹ��ۺϼ׻��ϩ��(2,��3-�h(hu��n)��)��,��þۺ��s��仯⛵��Ҵ��Һ��50��̎��1 h��Ƶ�(32~60Ŀ)�ľۼ׻��ϩ��(2,��3-��)��(��º��QDTMA),��

1.3 As(��)�x�ӵ��y��ԇ�l��x��

1.3.1 ��y��

�ý�(j��ng)�^��y��M��|(zh��)��֔�(sh��)��As2O3(90.50 %)��Ƴ��費ͬ��ȵā��Һ��Qȡһ��Ϙ�֬,��(j��ng)�A(y��)̎��뵽�b��֪��ȵā��Һ�ğ��,��늄Ӕ��C��裬�M��x�ӽ��Q��ԇ�,��׃�Q��N�l��,��y��Ӱ�,��ô΁��-��y��Һ��ò�p��Ϙ�֬(DTMA)��,��Ķ��ͬ�l��DTMA��Ľ��Q��l��,��

1.3.2 �x�ӽ��Q��y��

�Ƃ�3��ͬ�w�e��x�ӽ��Q��քe�b�н�(j��ng)�A(y��)̎��10 cm3��DTMA��15 cm3��DTMA,��20 cm3��DTMA,��w�քe��10 mm(Φ)×127 mm��10 mm(Φ)×191 mm,��10mm(Φ)×255 mm,��ĺ��UҺ�Բ�ͬ��ͨ�^�x�ӽ��Q��ô΁��-��Һ�е��麬��,��ò�p��w��,��Ķ��ͬ�l��µ��x�ӵĽ��Q��2 mol/L��(��5 %��仯�c)��c��Һϴ��,��ʹ��ѭ�h(hu��n)ʹ�ò��,��

2 �Y(ji��)��ӑՓ

2.1 DTMA��ͽ��Q��

��˿��DTMA��As(��)�Ľ��Q��Ĵ�С��ȡ��As(��)��5 g/L,��pHֵ��5.0��Һ400 mL��1 000 mL��,��DTMA 10 g��30��ض��³�֔��,��M�н��Q��ԇ�,��ͬ�r�g�µ�DTMA��As(��)�Ľ��Q��S��r�g��L,��As(��)�Ľ��Q��,��(d��ng)�M�е�120 min�󣬽��Q��,��(y��ng)څ��ƽ��,��(j��)��Y(ji��)��Ӌ�㣬��ԓ�l��DTMA��As(��)����157mg·g-1,��

ͬ��3��b�в�ͬ��DTMA�Ľ��Q��ԇ�,��cǰ��ԇ�l��ͬ��r��M��As(��)�Ľ��Q��yԇ��Y(ji��)��cǰ��Ĳ�ͬ,��F(xi��n)��ͬԇ�Y(ji��)��ԭ��M��ԇ�r,��M��˔��裬ʹDTMA��Q��As(��)�x�ӿ����,��M��Q��r�o��֔��,��ˣ��_����Ҳ�Ե�,��

2.2 ��ҺpH��Q��Ӱ�

DTMA��ƫ��Ի��,��ÿһ��w�ϵăɂ��ʧȥ�ɂ��ԭ�Ӷ��ؓ�x�ӣ��r��ữ��ˮ��Һ�еĴ��ΑB(t��i)�c��Һ��A��P(gu��n)[1],��,��̎��^�ĺ��ˮ��Һ��pHֵ��׃��Ӱ푵�As(��)�x�ӵĴ��ΑB(t��i)��҂��Ý��5 g/L(As(��))��Һ�ڳ��M��˲�ͬ��ҺpHֵ�Ľ��Q��,��ò�ͬpHֵ��As(��)����,��D��һ��@��ֵ��DTMA��Һ�е�As(��)��pHֵ��(y��ng)��4.6~5.5,��

�@��DTMA��Ի��,��m��ЉA��ϣ��Ի��,��ڏ��Һ��,��x��ʽ��ڣ��M��(y��ng)

H3AsO3+3HCl=AsCl3+3H2O
2H3AsO3+3H2SO4=As2(SO4)3+6H2O

�ډA��Һ��x��ʽ��,��ƽ��

As(OH)3=H++H2AsO3-=2H++HAsO3-3

��,��DTMA��pHֵ��cAs(��)��x��ʽ��ڵ�pHֵ��دB��4.6~5.5֮�g��˕r,��γɷ�(w��n)��,��(d��ng)��ҺpHֵС��4.6�r��DTMA�К��Ϛ��x��y��x��,��ʹ��ؓ�x�Ӳ��x,��M��Ϸ��(y��ng);��(d��ng)��ҺpHֵ��5.5�r��As(��)��y��x��ΑB(t��i)��x,��ؓ�x��ʽ��,��Ҳ����,��M��x�ӽ��Q��r��pHֵ��5.0��,��

2.3 �ضȌ��x�ӽ��Q��֬��ܵ�Ӱ��ҺpHֵ��5.0��As(��)��Ȟ�5 g/L�ėl��,��˲�ͬ�ض��DTMA�Ľ��Q��,��

�S��Һ�ضȵ��ߣ�DTMA��As(��)����,��50��һ��D(zhu��n)��c,��Ҝض�Խ�ߣ��֬��As(��)����Ҳ��Խ��,��ڜضȸ��100��r,��ضȌ��֬��As(��)Ӱ푺ܴ��@��Ϙ�֬��As(��)�γɵ��Ͻ��,��ܟ��ה��I��,��,��ض�һ��Բ��50��ˡ�

2.4 ��x�ӌ��Ϙ�֬��As(��)�x�ӵ�Ӱ��ԇ��a(ch��n)�^��y��s�|(zh��)�x�Ӵ��,��ܕ�Ӱ��Ϙ�֬��ͽ��Q��^��,��ˣ��҂��˺��и��N�s�|(zh��)�x�ӵ��Һ�M��ԇ�,��l��:�x�ӽ��Q��(10 mm(Φ)×255 mm),��Ҝأ�pHֵ5.0,��600 mL/h,��ÿ�Ό��1 200 mL��Һ��

��M�ɏ�(f��)�s�ĺ��Һ,��DTMA��As(��)��кܸߵĽ��Q��ʺͺܺõ��x��,��؄e��cK+��Na+,��Ca2+,��Mg2+��F(xi��n)e2+,��Zn2+�ķ��xЧ��ܺã��ʵ�,��Ӱ푣��Hg2+�t��F(xi��n)��ܺõ��,��f��ԓ��Ϙ�֬Ҳ��Hg2+��Ó��,��

2.5 ��Ļ��c��Ϙ�֬��ϴ��

ͨ�^һϵ��ԇ򞣬�l(f��)�F(xi��n)DTMA�x�ӽ��Q��2 mol/L��c(��5 %��仯�c)��Һϴ��,��ϴ��Ч��O��,��DTMA��֬��ʸߣ��ѭ�h(hu��n)ʹ�ã�ͬ�rϴÓ��ɳ��,��

3 �Y(ji��) Փ

��Ƶ��x�ӽ��Q��֬�ĺ��ˮ��Ó��As(��)��ԇ��о��

1)ԓ��x�ӽ��Q��֬�Ƃ了��,��As(��)ͽ��Q��,��ʸ�,��

2)��As(��)��Һ��pHֵ��Q��һ��Ӱ�,��һ��pHֵ��4.6~5.5֮�g��

3)�ض�ҲӰ�ԓ��x�ӽ��Q��֬��As(��)��,��ڜضȲ��50��rӰ��^С,��ԓ��Ϙ�֬�؄e�m��ڳ��As(��)��

4)��As(��)��Һ�еĹ��s�|(zh��)�x�ӌ��Ϙ�֬�^�󲿷֛]��Ӱ푣�ֻ��Hg(��)�x��Ҳ�ܱ�ԓ��Ϙ�֬��Ч��,��ˣ�Ҳ��Ԕඨԓ��Ϙ�֬��Hg(��)�x�ӵ��x��x�ӽ��Q��֬,��

5)��Y(ji��)�x�ӽ��Q��ԇ��Ч��,��Եó�ԓ��x�Ә�֬��Q��Ó��As(��)��ԇ�l��:��w10 mm(Φ)×255 mm;pHֵ5.0;��600 mL/h;��ԓ�l��As(��)��ʿ��_99.99 %��,��ÓAs(��)Һ��As(��)��ȫ�_��(bi��o),��x�ӽ��Q��2 mol/L�Ě��c(5 %��仯�c)��Һ��ϴÓ��ϴ��,��ɻ��As(��)�x�Ӳ�ʹ��Ϙ�֬��,��ѭ�h(hu��n)ʹ�á�

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