Santacruz Germán, Bandala Erick R, Torres Luis G
El Colegio de San Luis, AC, SLP, SLP, Mexico.
J Environ Sci Health B. 2005;40(4):571-83. doi: 10.1081/PFC-200061545.
Degradation of two chlorinated pesticides (2,4-D and DDT) using a 54-mL glass column packed with tezontle (a low-cost basaltic scoria) was tested. Bacteria were cultured in YPG (yeast, peptone, and glucose) liquid medium at 32 degrees C. The rich medium was pumped during 24 h through the column to inoculate it. Later, the wasted medium was discharged and the pesticide added. Optical densities, TOC, and pesticide concentration were determined. Pesticide removals for 2,4-D (with initial concentration between 100 and 500 mg/L) were about 99%. DDT removal (at initial concentration of up to 150 mg/L) was as high as 55-99%. TOC removals for 2,4-D was in the 36-87% interval, whereas for DDT they were as high as 36-78%.
测试了使用填充有特松特尔（一种低成本玄武岩火山渣）的54毫升玻璃柱对两种氯化农药（2,4-二氯苯氧乙酸和滴滴涕）的降解情况。细菌在32摄氏度的YPG（酵母、蛋白胨和葡萄糖）液体培养基中培养。在24小时内将丰富的培养基泵入柱中以接种。之后，排出废弃的培养基并添加农药。测定了光密度、总有机碳和农药浓度。2,4-二氯苯氧乙酸（初始浓度在100至500毫克/升之间）的农药去除率约为99%。滴滴涕的去除率（初始浓度高达150毫克/升）高达55-99%。2,4-二氯苯氧乙酸的总有机碳去除率在36-87%之间，而滴滴涕的总有机碳去除率高达36-78%。
