UV/Fe3+/H2O2��Y��Ⱦ�ϏUˮ

��r�g��2009-12-09 16:04 ��Դ�� : ��x��2959

��u��ɻ�̎��y��ЙC�Uˮ�ĸ߼��g(Advanced Oxidation Technologies, AOT)�ܵ��ձ��Pע[1],��Fenton��Ч�خa��·OH,��Ҳ��Ρ��ɱ��,��о��c��H��[2-3],��ԓ�wϵ�д߻��ֽ�H2O2��Ҫ��Fe2+��pHֵ��a��F��,��ɶ��Ⱦ[4],��Ҿֲ��ߝ�ȵ�Fe2+��H2O2��֕��ЙC��ĵV��̶�[5],��UV/Fe3+/H2O2��ɵ��Fenton�wϵ,��ڿ��^�͝�ȵ�Fe3+�߻�H2O2�ֽ��ܚgӭ[4]��Ȼ�h(hu��n)��д��Fe3+/H2O2�wϵ,��о�Ҳ��һ��ƌW��x[6],��

Ⱦ�ϏUˮ�ǹ��J��^�y̎��Ĺ��I(y��)�Uˮ֮һ[7]��؄e�Ǻ��x��y��Ⱦ�ϏUˮ,��팦΢��a��,��û��̎��Ч��Ҳ��룬�ʶ��Fenton��ȸ߼��g̎��A̎��,��о��˺��x��Ⱦ�ϽY��ϵďUˮ��UV/Fe3+/H2O2�wϵ�µĽ��Ҏ(gu��)��,��錍�HȾ�ϏUˮ��̎��ṩ��(j��)��

1 ��򞲿��

1.1 ��Ҫԇ��c�x��

��F,��H2O2(30%),��Y��(CV)�Ⱦ��AR��20W��Ϻ��ʺ��,��400W��u��V�|�W��756P��Ҋ�ֹ��Ӌ��Ϻ��V��,��COD��+DR-890��ɫӋ��HACH��868��pHӋ(��ORION��,��

1.2 ��򞷽��

��һ��w�eһ��ȵĽY��ģ�Mˮ��ڜ\�ط��,��Fe2(SO4)3��H2SO4��NaOH�{��(ji��)pHֵ,��H2O2,��Ѹ�ٻ��ڹ�Դ��̎��ؔ��跴��,��һ��r�gȡ��,��ֹ��,��y��ʣ��ĽY��ϝ�Ⱥ�COD��

1.3 ��

�F�Ĝy��ȷ�,��H2O2�Ĝy��Һ��ȷ�,��Y��ϣ�583nm�y��ȣ�COD��ܷⷨ,��īI[8]�ų�H2O2�ĸɔ_,��

Óɫ��=(C0-C)/C0��C0—��ǰ�Y��ϝ��,��C—��һ��r�g�ĽY��ϝ��,��ՓH2O2��Ӌ�㷽��Ҋ�īI[3]��

2 ԇ�Y��ӑՓ

2.1 �Y��ڲ�ͬ�l��µĽ��

a��,��b��Fe3+��0.5mM, ��,��c��H2O2=10mM, ��⣻d��Fe3+��0.5mM, H2O2=10mM, ��,��e��Fe3+��0.5mM, H2O2=10mM, ��,��f��Fe3+��0.5mM, H2O2=10mM, ģ�M��Ҋ�⣻��l��pH=2.72, ��ʼ�Y��ϝ��CV0=105.9mg/L, COD0=158.3mg/L, T=15��

��1�ǌ��Y��ڲ�ͬ�l��½��80min��ʣ��COD,�,��֪�Y��±��^��(w��n)��(��a)��Fe3+�Ĵ��ܲ��Ɖ�Ⱦ�Ϸ��ӵĹ�ܗ�Y��Óɫ,��80minÓɫ�ʴ��40%(��b),��@��Fe(��)��u��j��a��߻��Ե�·OH(��ʽ1)��ͬ�r߀��Ⱦ�ϱ��[9](��ʽ2-4),��Ƿ��Ŀ��Ӯa�ʲ��,��ȱ��Fe(��)��ęC�ƣ��ÓɫЧ�ʲ��,��Ҳ��܏ص׽��Ⱦ��(COD�׺��׃),��UV/H2O2�wϵ��ʹ�Y��^��Óɫ(��c)��@��H2O2�Ĺ��a��·OH(��ʽ5),��·OH��׏ͺ�ʧ��,��½��ٶȺ͵V��Ч�ʲ��ߣ�80min��ʣ��COD׃��,��@��ɵĴ��С��g�a�ﲻ��Mһ��ȫ�V��,��ʹˮ��COD��ߣ��īI[10]�^�쵽��ƬF(xi��n)��,��

��1 ��l��½��80min��ʣ��COD

Fe3+/H2O2��Y��ٶȺ��(��d),��ҵV��Ч��ܲ��80min��COD��׃,��@��鰵Fenton��Ҫͨ�^��6��l(f��),��ɵ�Fe2+�cH2O2�Mһ��7�a��·OH,��6�Ą��W��(sh��)k�^С(2×10-3)��һ��J��Fenton��Ŀ��Ʋ��E[11],��,��ܴ��ٽY��ϵ�Óɫ�ٶ�(��e)��ͬ�r��ߵV��̶�,��40min�Y��ώ׺��ȫÓɫ,��80min��COD��52mg/L��@��ڳ��˷��6,��7��,��1Ҳ��l(f��)Fenton��ڴ߻�H2O2�ֽ�ąf(xi��)ͬЧ��,��ý��u��ģ�M��Ҋ��,��܉��Ը��ٶȽ��Y��(��f)��ҵV��̶�Ҳ�^��,��@�ǹ�Դ�Ĺ⏊�^��ṩ��ľ��,��@Ҳ��̫ꖹ��Fenton��ЙC��Ⱦ��ǿ��еġ�

2.2 ��ʼpHֵ��Ӱ�

�ڲ�ͬpHֵ�²��UV/Fe3+/H2O2�wϵ��Y��,��Y��D2��ʾ,��pH=2.70�rÓɫ�ٶ��죬�@�c��Fenton��FentonҎ(gu��)��һ�µ�,��ԓ��C��c��ЙC��Դ�ķNo�P,��Pignatello��о��Fe(��)��ΑB(t��i)�SpHֵ׃��ͬ��Ч��ֱ��cFe(��)��ΑB(t��i)��P,��pH>5�r,��F(xi��n)e(��)��γ�Fe(OH)3��pHֵ��2.8��ҕr,��F(xi��n)e(OH)2+�ΑB(t��i)�_��ֵ[6],��ռ�F��һ��ң��Fe(OH)2+��l(f��)��Fenton��P�I��ʽ1��,��ڴ�pHֵ��Fenton��ٶ��,��
Fe3+=0.5mM,H2O2=10mM,CV0=104.0mg/L

2.3 H2O2Ͷ��Ӱ�

�Y��ϵ�Óɫ�ٶȺܿ죬��H2O2��5mM�r20minÓɫ�ʾ��_��98%��,��Ͷ��Óɫ�ʛ]�Ќ��H��x,��Mһ��COD��ȥ��Ч��(��2)��@��Ⱦ�ϏUˮ�ĵV��Óɫ,��H2O2��Խ��V��̶�Խ�ߡ��ͬH2O2��(10mM),��քe��һ��Ͷ�Ӻ͵�0,��15,��30min��Ͷ�ӣ��܌�CODȥ��ʏ�60.1%��ߵ�70.6%,��@�f��ڌ��H�Uˮ̎��H2O2�˲��B�m(x��)��Ͷ�ӷ�ʽ,��

H2O2��(a)2.5mM, (b)5mM, (c)10mM, (d)20mM, (e)10mM��Ͷ��,��l��Fe3+��0.5mM, CV0=104.0mg/L,COD0=153mg/L, pH=2.72,T=15��

��2 ��ͬH2O2��80min��CODȥ��

2.4 Fe3+Ͷ��Ӱ�

�D4�ǲ�ͬ�F�x��µ�ÓɫҎ(gu��)�ɡ�Fe3+��Խ��,��l(f��)��ٶ�Խ��,��Óɫ�ٶ�Խ�죬�F��0.3mM�r80minÓɫ�ʾ��98%,��K�V��̶ȁ��(��3),��0.5mM��ѣ��^��Fe3+��Fe2+,��ߝ�ȵ�Fe2+��·OH��(��8),��Ķ��˵V��Ч�ʡ��0.3mM��rCODȥ��Ҳ�^��,��_��66%,��ɴ˿�ҊFe3+��Fenton��^��F�x��ėl��кܺõĽY��

��(8)

H2O2=10mM,CV0=104.0mg/L,COD0=153mg/L, pH=2.70, T=20��

��3 ��ͬF(xi��n)e3+��80min��CODȥ��

2.5 �Y��ϏUˮ��ǰ��Է��

��-��Ҋ��չ��V��Fenton��ǰ��ķ��׃��r,��Y��D5��ʾ,��20minˮ�ӵ��չ��V��563nm��շ��ʧ,��300 nm��µ��շ�Ҳ��ʧ,��f��ӵĴ�π��ܗ�wϵ�ѱ��Ɖģ��h(hu��n)�Y��Ҳ��_,��^(q��)�в��,��Ҫ��С��ӵĻ��Ⱦ�Ϸ��δ��ȫ�V��,��^��ǰ��Ŀ��,��Y��20 min��ˮ��BOD5/COD��0.034��ߵ�0.32��ʣ��COD��Mһ��ú��g̎��,��ˌ��ڸߝ�ȵ��ЙCȾ�ϏUˮ,��Բ��Fenton��-��ĽM�Ϲ�ˇ��Խ��\�гɱ�,��

1��̎��ǰ,��2��20min��