�п��w�S��ҺĤ��g(sh��)̎��t�Uˮ

��r�g��2009-09-18 13:32 ��Դ�� : �� v ��l(w��i)�| �Ų�� R�� x��4657

l ǰ��

��,��ƸＰ�t�}T�I(y��)ÿ��ŷŴ��ĺ��t�Uˮ ��У��H�像Uˮ��ŷ��_40�|m ��y ��t�Uˮ��ԣ��t�x��Ҫ��CrO ��Cr O ��ʽ��,��Cr(VI)��^��,��w��Ƥ�w��Ĥ,��Ϻ��ϵ�y(t��ng)��^��Ĵ̼��Ժ͸��g��,��w��պ��°��T�l(f��)��ͻ׃��Σ�U ��t�Uˮ��(y��n)��ȾˮԴ,��,��Ɖ��B(t��i)�h(hu��n)��GB8978—1 996��ˮ�C��ŷŘ�(bi��o)��(zh��n)��(y��n)��Cr(VI)��S�ŷŝ�Ȟ�0��5 mg��I ,��t�Uˮ�ğo��̎��I(y��)�^�̲��ȱ�ٵ�T ˇ�h(hu��n)��(ji��)֮һ,��t�Uˮ��̎��^�࣬��Ҫ��߀ԭ��,��늽�߀ԭ��,��x�ӽ��Q��ȡ��,��߀ԭ��mȻ̎��M�õ��,��a(ch��n)��Լ��t��,��Ⱦ��(y��n)�أ�늽�߀ԭ��Ĵ��ܼ�䓲�,��\��M�ø�,��x�ӽ��Q��һ��Ͷ�Y�󣬲��(f��)�s,��֬��,��Ȇ��}��δ��Ч��Q��˷��ȱ�c,��о��߂��˶�N��̎��g(sh��),��ҺĤ��^��Ч�ķ��֮һ��E��L��Cussler�� 1975��Ͳ��尷��d�w,��Spanһ80��Ԅ��黯ҺĤ�wϵ,��о��cr(VI)��ͬ��x�͝�s�^�̡��(n��i)��@��о��Ǐ�20��o(j��)80��_ʼ�� ,��о��Y(ji��)�� ,��ҺĤ��t�Uˮ��^�õ�̎��Ч��cr(VI)ȥ��ʸ�,��̎��^�̲��a(ch��n)��Ⱦ,��ǣ��y(t��ng)ҺĤ��g(sh��)��S��δ��Ч��Q��P(gu��n)�I�Ԇ��}��黯ҺĤ��,��y��й©,��Û�Ȇ��}��֧��ҺĤ��d�w��ʧ,��(w��n)��Բ�Ȇ��} ,��@Щ��}�O��ҺĤ��g(sh��)�ں��t�Uˮ̎��I(l��ng)��еđ�(y��ng)��,��п��w�S��ҺĤ(Hollow Fiber Renewal LiquidMembrane,��HFRLM)��һ�N��͵�ҺĤ��g(sh��)��^�õؽ�Q��y(t��ng)ҺĤ��g(sh��)��ڵĆ��},��^�õķ�(w��n)��Ժ��^�ߵĂ��|(zh��)Ч�� ,��ѳɹ��cu �ķ��x ��Č�ͨ�^��о�,��̽ӑHFRLM��g(sh��)��t�Uˮ��̎��Ч��,��ԓ��g(sh��)��Cr(VI)��ȥ��Լ��s��r,��

2 ��򞲿��

2��1 ԇ�x��

2��1��1 ��Ҫ�x��
G751��⣮��Ҋ�ֹ��Ӌ(�Ϻ��x��S),��ӱ�(��m��)��,��

2��2��2 ԇ��
K Cr 0 (��t�ǻ��S),��NaOH(��S)��TBP(��򸣳��S),��ú��(��ï��S),��̼��(��򸣳��S)��}��,��,��Ⱦ��Һ��ȥ�x��ˮ��,��п��w�S��п��w�SĤ��|��(sh��)Ҋ��1,��

2��2 ��򞲽�E

��x��40��֬(TBP)��ú�͞��ȡ��,��TBP��d�w,��ú�͞�ϡጄ��NaOH��Һ1 mol��L��̈́�,��K Cr 0 ��Һģ�M��t��I(y��)�Uˮ,��Cr(VI)��ʼ��90—100 mg��L֮�g��HC1(�w�e��1��1)�{(di��o)��(ji��)�Uˮ��[H ],��ѭ�h(hu��n)��b�ü��D1��ʾ,��,��ȡ��c��̈́��?j��n)��?�w�e�ȼs��1��20)��ʹ�ЙC��΢СҺ�ε��ʽ��ط�ɢ�ڷ��̈́��,��ͬ�M��п��w�S�܃�(n��i),��̎��ģ�M��I(y��)�Uˮ�M��Ĥ��|��̣��B�m(x��)��,��

2��3 ��

ˮ��Cr(VI)��Ȳ��ø��M��Ķ��̼��·ֹ��ȷ��y��,��ЙC��Cr(VI)��ͨ�^��Ϻ��ȡ��Һ�г�ʼ[H ]��NaOH��(bi��o)��(zh��n)��Һ�ζ��y��,��Է�̪��ָʾ��,��K Cr 0 ��Һ��ɫ��(j��)��Ȳ�ͬ�@�Sɫ��ɫ��ȣ��һ�㲻��A�ζ��y��[H ],��,��cr(VI)��ȵͣ��@�\�Sɫ,��ζ�ǰ�m��(d��ng)ϡጺ�,��ɫ�ѽ�(j��ng)��@��֮ԓ�ζ��(y��ng)�K�c�ɫ׃��@��,��,��ͨ�^��Ό��C��y��Ʒ��ɫ��Ӱ푵ζ��K�c��ж�,��ԓ�y��ȫ�M�㌍򞾫�ȵ�Ҫ��,��

3 �Y(ji��)��cӑՓ

3��1 HFRLM��g(sh��)��Cr(VI)��ȥ��Ч��

�Uˮ��Cr(VI)��ȥ��S�r�g׃��P(gu��n)ϵ��D2��ʾ��ʼ�A��,��ȥ��Ѹ��,��̎��^��M�е�40 min�r,��ȥ��_90�� ,��75 min�r��Cr(VI)��ȏ�87��2 mg��L��1��6 mg��L,��ȥ��_��98��2�� ,��ֽ�(j��ng)�^20 rain��Cr(VI)��_0��1 mg��L,��ȥ��ʸ��_99��8�� ,��HFRLM��g(sh��)�У��п��w�SĤ��(n��i)��ϵ�ҺĤ��B�m(x��)��²��,��Џ��|(zh��)��,��Ҳ��п��w�SĤ��|��ṩ�^��Ă��|(zh��)�ȱ��e��l(w��i)�|�Ȳ��п��w�S��ҺĤ��g(sh��)̎��~�Uˮ�r,��w�e��|(zh��)ϵ��(sh��)�Ȃ��y(t��ng)��ȡ��530�౶ ,��ɈD2��ʾ�ĽY(ji��)��Կ��,��ʹ��HFRLM��g(sh��)̎��t�UˮҲ��п��١��Ч��c,��

3,��2 HFRLM��g(sh��)��Cr(VI)�ĝ�sЧ��
ҺĤ��g(sh��)��ă�(y��u)�c֮һ�ǌ��F(xi��n)��ȡ��ȡ�^�̵ă�(n��i)��,��з�ƽ��|(zh��)��c,��HFRLM��һ�N��͵�ҺĤ��g(sh��)��ں��t�Uˮ̎��г�ְl(f��)�]��(y��u)�c��һ��,��Uˮ��Cr(VI)��ҺĤ�w��,��ͬ�r��cr(VI)��ҺĤ��һ��(c��)ጷ�,��ҺĤ�ɂ�(c��)pH��^��,��ʼ�K��^��Ă��|(zh��)�Ƅ��ʹ��cr(VI)��F(xi��n)��“��ݶ�”�w��,��80 mL��̈́�,��8 mL��ȡ��̎��2 200 mL��tģ�M��I(y��)�Uˮ��Y(ji��)��D3,��D4��ʾ,��̈́��cr(VI)��K��ȿ��_��s2 500 mg��L��(sh��)��_3O��,��̎��^�̵��g��Һ��ʹ��,��

��Y(ji��)��r��̈́��Cr(VI)��ȱ�ҺĤ��һ��(c��)�Uˮ��cr(VI)��ȸ߳�3��4��(sh��)��,��ҺĤ�ɂ�(c��)��Һ��ͷ��w�e�׺��]��׃��,��ԓ�Y(ji��)��H�C��HFRLM��g(sh��)��ƽ��|(zh��)��c��|(zh��)��Ԍ��F(xi��n)“��ݶ�”�w��,��F(xi��n)Cr(VI)�ĝ�s,��ͬ�rҲ��̈́��^ҺĤй©��Uˮ�У��Mһ��HFRLM��g(sh��)��^�õķ�(w��n)��,��γɵ�ҺĤ��Ч�طָ�ɂ�(c��)��w,��|(zh��)�^��Пoй©�l(f��)��

��l��,��|(zh��)�^�̕r�g�^�L(�s17 h),��Ҫԭ��Ǟ��˱��⚤�̷��ӵ��r��Ӱ푣��Ĥ��|��ĳߴ��^С,��b��w�S��(sh��)�^��,��b��^�ͣ��|(zh��)��e�OС,��H��5,��57×10m ,��L1 m��(n��i)��0,��2 m��п��w�SĤ��|��,��|(zh��)��e�t�ɸ��_150 m ��˕r,��̎��1 m Cr(VI)��ʼ��Ȟ�100 mg��L�ďUˮ,��̎��r��H��40rain(ͨ��ÈD3�Y(ji��)��Ӌ��õ�)��

4 �Y(ji��)Փ

��п��w�S��ҺĤ̎��t�Uˮ�ٶȿ�,��ȥ̎�ʸ��_99,��8�� Uˮ̎��cr(VI)��0��5 mg��L,��_��ŷŘ�(bi��o)��(zh��n),��s��cr(VI)��_��2 500 me,��L��(sh��)��_30�౶,��ԓ̎��^��в��a(ch��n)��Ⱦ,��s��ďUˮ�ɻ��ʹ�ã��Ķ��F(xi��n)�t��YԴ��,��ǌ��F(xi��n)�像Uˮ�]·ѭ�h(hu��n)��Ч�ֶ�֮һ,��僺��t�Uˮ̎��ЏV韵đ�(y��ng)��ǰ��

����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��