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1.1 ԇ ��

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

��ˮҺ��90.50 %��As2O3��,��1��As2O3�ĽM��|��֔�(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��

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1.3.2 �x�ӽ��Q��y��

�Ƃ�3��ͬ�w�e��x�ӽ��Q��քe�b�н��A̎��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��ӣ�ʹ��ѭ�h(hu��n)ʹ�ò��,��

2 �Y��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�֔��裬�M�н��Q��ԇ�,��ͬ�r�g�µ�DTMA��As(��)�Ľ��Q��,��S��r�g��L��As(��)�Ľ��Q��,��M�е�120 min��,��Q��ӣ��څ��ƽ��,��(j��)��Y��Ӌ��,��ԓ�l��DTMA��As(��)����157mg·g-1,��

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

2.2 ��ҺpH��Q��Ӱ�

DTMA��ƫ��Ի��ÿһ��w�ϵăɂ��ʧȥ�ɂ��ԭ�Ӷ��ؓ�x��,��r��ữ��ˮ��Һ�еĴ��ΑB(t��i)�c��Һ��A��P[1],��ˣ��̎��^�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��4.6~5.5��

�@��DTMA��Ի��,��m��ЉA��,��Ի���ڏ��Һ��,��x��ʽ��,��M��

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

�ډA��Һ��x��ʽ��ڣ��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)��,��ҺpHֵС��4.6�r,��DTMA�К��Ϛ��x��y��x�⣬ʹ��ؓ�x�Ӳ��x,��M��Ϸ��;��ҺpHֵ��5.5�r,��As(��)��y��x��ΑB(t��i)��x��ؓ�x��ʽ��,��Ҳ��,��ˣ��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��ܡ�

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

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

��M�ɏ��s�ĺ��Һ��DTMA��As(��)��кܸߵĽ��Q��ʺͺܺõ��x��,��؄e��cK+,��Na+��Ca2+,��Mg2+,��F(xi��n)e2+��Zn2+�ķ��xЧ��ܺ�,��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��,��ͬ�rϴÓ��ɳ��,��

3 �Y 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�|�x�ӌ��Ϙ�֬�^�󲿷֛]��Ӱ�,��ֻ��Hg(��)�x��Ҳ�ܱ�ԓ��Ϙ�֬��Ч��,��ˣ�Ҳ��Ԕඨԓ��Ϙ�֬��Hg(��)�x�ӵ��x��x�ӽ��Q��֬,��

5)��Y�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 %��ϣ�ÓAs(��)Һ��As(��)��ȫ�_��,��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��,��

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