Farghaly M, Zayed S M, Mahdy F, Soliman S M
National Research Centre, Dokki, Cairo, Egypt.
Biomed Environ Sci. 1998 Sep;11(3):218-25.
The degradation of U-14C-lindane in two Egyptian soils was determined in a three-month laboratory incubation. Lindane mineralization was slow and limited in both soils. Evolution of 14CO2 increased with time but only reached 3.5 to 5.5% of the initial 14C-concentration within 90 days. At that time both soils contained about 88% of the applied radiocarbon; 33% to 37% of the initial dose was unextractable and assumed bound to the soils. The methanol-extractable 14C primarily contained lindane with traces of minor metabolites. Radiorespirometry was used to evaluate the effect of lindane on soil microbial activity. Low concentrations of the insecticide initially supressed 14CO2 evolution from U-14C-glucose and microbial activity was significantly inhibited by 10 mg lindane/kg soil.
在为期三个月的实验室培养中，测定了两种埃及土壤中U-14C-林丹的降解情况。林丹的矿化作用在两种土壤中都很缓慢且有限。14CO2的释放量随时间增加，但在90天内仅达到初始14C浓度的3.5%至5.5%。此时，两种土壤中约含有88%的施加放射性碳；初始剂量的33%至37%无法提取，假定与土壤结合。甲醇可提取的14C主要含有林丹及微量次要代谢物。采用放射性呼吸测定法评估林丹对土壤微生物活性的影响。低浓度的杀虫剂最初抑制了U-14C-葡萄糖释放14CO2，且10 mg林丹/千克土壤显著抑制了微生物活性。
