��⁹�߻��ӡȾ�Uˮ��о�

��r�g��2008-09-11 10:45 ��Դ�� : ��x��3133

Ŀǰ,��ӡȾ�Uˮ�ľC��톖�}�ѳɞ鮔��h(hu��n)��ƌW�缱��Q��һ��y�}��@ЩȾ�ϏUˮ�ɷ��^��(f��)�s,��ߝ�ȡ��ɫ�ȡ��y��|(zh��)��,��ͬ�r߀��ﶾ�Լ��ܵ��ЙC��,��y�Բ��ó�Ҏ(gu��)��̎��ӡȾ�Uˮ�К��Ⱦ�ϽM��,��ʹ�ڝ�Ⱥ͕ܵr��ˮ�w��,��ˮ͸��ʵĽ��ͣ�ͬ�r�@ЩȾ�ϏUˮ��̫ꖵĹ⾀��Ӱ��ă��,��K��(d��o)��ˮ�w��B(t��i)ϵ�y(t��ng)��Ɖ�,��ᘌ��}��(n��i)�ⶼ��@��M��˴��о�,��ںܶ෽��ȡ��˳�Ч,��؄e�ڹ⻯�W��ȡ��ͻ�ơ��ð댧(d��o)�w��߻��,��ڹ�ݗ�Օr,��a(ch��n)��-��Ѩ��ɾ��ĸ߻��ɻ�,��Һ�е��Ľ��,��o��Ⱦ��ɞ鮔��о��ğ��c��Ŀǰ��P(gu��n)��߻��ӡȾ�Uˮ��о��Ј��{1}-{4},��ڴ߻��պ��Ȍ�ӡȾ�Uˮ��߻��Ӱ푵ȷ��о��^��,��о��ԑҸ��wϵTiO2��߻��HӡȾ�Uˮ�Ĺ�߻��l��߻��Ļ��M��о�,��

1��򞲿��

        1.1 �x��cԇ��

        1.1.1�x��
��
        Spectrumlab 22PC �ֹ��Ӌ��Ϻ��⼼�g(sh��)��޹�˾��,��78��A �ʹ��ӟᔇ��K�݃x��늙C�S��PHS��25 ��ȃx��Ϻ��ܿƌW�x��޹�˾��,��125W ��ɹ�߉��w��ց��޹�˾��,��

        1.1.2ˎƷ��
��
        ��⁣�CP��Ϻ,��Wԇ��S��,��

        1.1.3ӡȾ�Uˮˮ��ȡ�Թ��ĳӡȾ�S��أ��(j��ng)�y�� CODCr550mg•L

        1.2 ��򞷽��
��
        ȡ50mlӡȾ�Uˮ��ԭҺϡ�100��150ml��,��{(di��o)��(ji��)һ��pHֵ,��100mgTiO2��D1��߻��(y��ng)�b��,��{(di��o)��(ji��)��վ��x��9cm,��һ��r�g��M��x�ķ��x,��ȡ�ό��Һ�yCODCr��Óɫ��,��

1.3 CODCrȥ��,��Óɫ�ʵ�Ӌ�㣺

��1��t��⛷��y��ӡȾ�Uˮ��߻��ǰ��COD0��CODi��ʽӋ��CODȥ��ʣ�

��CODCrȥ�� = ��COD0��CODi��/COD0×100%

ʽ�У�COD0—�齵��ǰ�ĺ��(mg/L),�� CODi—�齵��ĺ��mg/L��,��

��2��÷ֹ��ȷ��y��ӡȾ�Uˮ��߻��ǰ��ȣ��ʽ��Óɫ�ʣ�

�� Óɫ�ʣ��A0��A��/A0×100��

ʽ�У�A0—��߻�ǰ��,��A—��߻��,��

1.4 ��(n��i)��

��ȡ50mlӡȾ�Uˮ��ԭҺϡ�100��150ml��У��{(di��o)��(ji��)pHֵ,��100mgTiO2,��{(di��o)��(ji��)��վ��x��9cm��1h��,��y��ͬpHֵ�rӡȾ�Uˮ��Ⱥ�COD,��l��̶��r�£��ͬ�ӵķ��քe�y��߻��,��վ��x,��Օr�g��߻��Ռ��߻��ӡȾ�Uˮ��Ӱ�,��Y(ji��)��Ҋ��1,��2��3,��4,��5��

2 �Y(ji��)��cӑՓ

2.1 ��ʼpHֵ��ӡȾ�Uˮ��Ӱ�

��ı�1��Կ��,��(y��ng)Ҵ��ʼpHֵ��COD��ӡȾ�Uˮ��Óɫ��Ӱ푺ܴ�,��pHֵ=2-6֮�g,��SpHֵ��Óɫ��_ʼ��,��pH=3�rÓɫ��_90.6%,��Ȼ��@�½��pH=6�rÓɫ��,��pH=8��10֮�g,��S��pHֵ��Óɫ��,��׃��@,��Һ��pHֵ�ܸ�׃TiO2�w��늺ɣ��Ķ��׃�w��Һ�еķ�ɢ��r[5],��[H+]��ӕr,��TiO2��u��ӣ��M�u��·OH��ɻ�,��·OH��ɻ��ĝ��,��ڏUˮ�Ľ��,��TiO2��һ�N��Խ����pH��ڵ��c�rTiO2��控ؓ늺�,��pHֵС�ڵ��c�rTiO2��控��늺�,��pH�c��c��ȕrTiO2��@��,��늺��|(zh��)Ӱ푷�ӳ�wϵ��|(zh��)��TiO2��,��Ӱ푹��ӡ��Ѩ��TiO2��w��Լ��댧(d��o)�w�M��ܼ��λ��,��Ӱ푹�߻��^��,��TiO2��控��늺ɕr��ڹ��߻��w��,��c��O2��(y��ng),��Ķ��c��Ѩ��e-/h+��ď�(f��)�ϣ��a(ch��n)��л��Ե�·OH��ɻ�,��M��߻��,��TiO2��控ؓ늺ɕr��ڿ�Ѩ��TiO2��w��,��c��һЩ��ӹ��wOH,��H2O��(y��ng)�a(ch��n)��Џ��Ե�·OH��ɻ��ʹ��(y��ng)��Ч��,�� TiO2��@��ԕr,��ӻ��Ѩ��w�ƣ��Ч��^��,��

��ڷ��(y��ng)Ҵ�ĳ�ʼpHֵ��5��10֮�g,��Óɫ��׃��Ǻܴ��Uˮ��,��̼�᡾6��,��Ӱ��Һ��pHֵ��ǳ�ʼpHֵ��5��10֮�g��ӡȾ�Uˮ��Һ��ܷ��(y��ng)��ɵ��Ӱ�,��@�Ӿ��pH=5��10��(n��i)Óɫ��׃��,��ʼpH��2�rÓɫЧ��͵�ԭ��H+��^�ߣ��H2O��x,��ʹ�u��ĝ�Ƚ��,��(d��o)��·OH��ɻ��Ƚ��ͣ�Ӱ푹�߻��Ч��,��

��1��ʼpHֵ��UˮÓɫ�ʵ�Ӱ�

pHֵ	2	3	3.5	4	5	6	8	9	10
Óɫ�ʣ��	56.0	90.6	58.2	52.8	50.0	49.0	49.6	50.0	52.5

2.2 �߻��Uˮ��Ӱ�

��ɱ�2��Ҋ,��TiO2��4g/L�r�⽵��Ч��ѡ��S��TiO2��,��Ч��u��,��_��һ��ֵ�r,��Ч�ʲ��ߣ��½�,��@��Һ�ĝ��ֱ��Ӱ푹�߻�Ч��,��m��Ӵ߻��͸��Ժ�,��ڹ��c��댧(d��o)�w��ײ,��a(ch��n)��|(zh��)��ӿ콵��,��߻��_��һ��ֵ�r,��õ��˳�ֵ��ã��^�m(x��)��Ӵ߻��,��ʹ��Һ�ĝ��,��͸��ȜpС��(d��o)�½��Ч��½�,��˴߻��m�˷��(n��i),��

��2��߻��Uˮ��Óɫ�ʡ�CODȥ��ʵ�Ӱ�

TiO₂��g/L��	0	1	2	3	4	5
Óɫ�ʣ��	7.9	89.5	90.6	92.0	93.6	91.7
CODȥ��ʣ��	35.3	54.9	68.6	78.4	83.5	80.8

��pHֵ=3,��վ��x9cm,��Օr�g1h��

2.3 �⏊��Uˮ��Ӱ�

��о��й⏊��ͨ�^��׃��վ��x��׃��С��ɱ�3��Կ��߻��ⷴ��(y��ng)��Ч��c�⏊��P(gu��n),��⏊Խ��,��TiO2��ܹ��ӵĔ�(sh��)ĿԽ�࣬��l(f��)��e-��h+,��a(ch��n)��·OH��ɻ�,��⏊�^�󣬷��߻��,��ԭ��Ǵ˕r��g��ڴ߻��ĸ��ԏ�(f��)��,��˱��x��x9cm��ѡ�

��3��⏊��UˮÓɫ�ʵ�Ӱ�

��վ��x��cm��	6	9	15	20
Óɫ�ʣ��	90.9	93.6	94.4	92.9
CODȥ��ʣ��	80.4	83.5	82.5	53.4

��pHֵ=3,��߻��4g/L,��Օr�g1h��

2.4 ��Օr�g��Uˮ��Ӱ�

��ɱ�4��Ҋ��S��Օr�g��,��CODȥ��ʺ�Óɫ��S֮��,��Օr�g��2h��@ȻCODȥ��ʺ�Óɫ��f��,��څ��ƽ��,��ˣ��Օr�g��2h��^��m,��

��4��Օr�g��UˮCODȥ��ʵ�Ӱ�

��Օr�g��h��	0.5	1	1.5	2	3	4
Óɫ�ʣ��	45.0	93.6	94.9	96.0	96.7	97.3
CODȥ��ʣ��	26.4	83.5	85.0	88.5	92.2	96.0

��pHֵ=3,��߻��4g/L,��վ��x9cm��

2.5 �߻��

��]��N��ӵ��أ��H�x�õĴ߻��^��(w��n)��,��܉��؏�(f��)ʹ��,��Խ��̎��ɱ��ˌ��߻��Mһ��Ļ��̎��,��

��TiO2��^С,��x�ó��ϴ�취��գ��(j��ng)�R�Рt�1С�r��,��ڹ�߻��,��Y(ji��)��Ҋ��5,��Ҋ,��ͨ�^��؏�(f��)��պ󣬹��Ч��½�,��TiO2�߻��Ǳ��^��(w��n)��,��؏�(f��)ʹ�ã��Óɫ�ʼ�CODȥ��^��,��

��5��߻��

��մΔ�(sh��)	0	1	2	3
Óɫ�ʣ��	96.0	93.9	93.5	92.4
CODȥ��ʣ��	88.5	84.3	82.3	80.4

��pHֵ=3,��߻��4g/L��վ��x9cm,��Օr�g2h��

3 �Y(ji��)Փ

��ù�߻��g(sh��),��о��TiO2��߻��⌍�HӡȾ�Uˮ��̽ӑ�˹�߻��Ӱ��,��Y(ji��)��pH��3,��TiO2��4g/L�ėl��½��Ч��ѣ��ڹ��2h��,��HӡȾ�Uˮ��Óɫ��_��95.9��,��CODȥ��_��88.5��TiO2�߻��ͨ�^3�λ��؏�(f��)ʹ��Ծ��^�õĹ�߻��,��

��֮,��߻��̎��ЙC�Uˮ��Ŀǰ�о��·��ͨ�^��о��õĽY(ji��)Փ�ڹ��I(y��)�ЙC�Uˮ��̎��Ͼ��һ��ą��ָ��(d��o)��x,��߻��й�ˇ�O(sh��)�了��,��l��׿��ƣ�̎��ɱ��^��,��,��o��Ⱦ��ͻ��(y��u)�c��ЙC�Uˮ̎��V韵đ�(y��ng)��ǰ��,��

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