利用化学沉淀法制备了纳米级Fe和纳米级Pd/Fe双金属催化剂,研究了它们对2,4-二氯苯酚(2,4-DCP)还原脱氯的催化性能.结果表明,纳米级颗粒具有较高的比表面积和表面反应活性,其BET比表面积可达12.4 m2/g,当Pd/Fe用量为6 g/L时,2,4-DCP脱氯率达到90%以上.脱氯效率与pH值、温度、钯含量和Pd/Fe投加量等因素有关.2,4-DCP在脱氯过程中先生成2-氯苯酚和4-氯苯酚,最终生成苯酚,而少量的2,4-DCP可直接降解成苯酚.
参考文献
| [1] | Sweeny K H.[M].Denver,1979:1487. |
| [2] | Sweeny K H .[J].AIChE Symposium Series,1981(77):72. |
| [3] | Senzaki T;Kumagai Y.[J].Kogyo Yosui,1988(357):2. |
| [4] | Senzaki T;Kumagai Y.[J].Kogyo Yosui,1989(369):19. |
| [5] | GillhamRW;O'Hannesin S F;International Association of Hydrologists (ed).IAH Conference on Modern Trends in Hydrogeology[J].Hamilton,1992:10. |
| [6] | GillhamRW;O'Hannesin S F .[J].地下水,1994,32:958. |
| [7] | Burrow P D;Aflatooni K;Gallup G A .[J].Environmental Science and Technology,2000,34(16):3368. |
| [8] | 刘毅慧,全燮,陈景文,杨凤林,陈国华.氯代芳烃脱氯速率常数的QSPR研究[J].大连理工大学学报,2000(03):301-304. |
| [9] | 全燮,刘会娟,杨凤林,薛大明,赵雅芝.二元金属体系对水中多氯有机物的催化还原脱氯特性[J].中国环境科学,1998(04):333-336. |
| [10] | 全燮;杨凤林;薛大明;赵雅芝, 冯文国, 苍郁 .[J].大连理工大学学报,1997,37(01):46. |
| [11] | Muftikian R;Fernando Q;Korte N .[J].Water Research,1995,29(10):2434. |
| [12] | Liu YH.;Yue PL.;Chen GH.;Yang FL. .Catalytic dechlorination of chlorophenols in water by palladium/iron[J].Water research: A journal of the international water association,2001(8):1887-1890. |
| [13] | Zhang W-X;Wang Ch-B;Lien H-L .[J].Catalysis Today,1998,40(04):387. |
| [14] | Lien HL.;Zhang WX. .Nanoscale iron particles for complete reduction of chlorinated ethenes[J].Colloids and Surfaces. A, Physicochemical and Engineering Aspects,2001(1/2):97-105. |
| [15] | Wang C-B;Zhang W-X .[J].Environmental Science and Technology,1997,31(07):2154. |
| [16] | Choe S;Lee S-H;Chang Y-Y;Hwang K-Y,Khim J .[J].Chemosphere,2001,42(04):367. |
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