CAJ | 학술논문

生物降解方法是处理有机物污染的土壤和地下水的主要途径。试验以污染场地土壤为样本，分析土样的有机碳含量、容重、密度、孔隙比、饱和含水率等基本物理特性，并制作成试验土柱，模拟研究四氯化碳在包气带土壤中垂直迁移规律，动态分析影响生物降解的主要因素。结果表明，四氯化碳随淋溶作用向深层迁移，并在包气带底部积聚；温度是影响生物降解的重要因素，当温度为18℃时，稳定降解率最大为48．2μg／L；该菌株最适宜降解的四氯化碳淋溶强度为42．3μg／L ，此时菌株能正常地进行生物代谢；25 g／L的葡萄糖对微生物降解有促进作用，稳定降解率达44．3％。
생물강해방법시처리유궤물오염적토양화지하수적주요도경。시험이오염장지토양위양본，분석토양적유궤탄함량、용중、밀도、공극비、포화함수솔등기본물리특성，병제작성시험토주，모의연구사록화탄재포기대토양중수직천이규률，동태분석영향생물강해적주요인소。결과표명，사록화탄수림용작용향심층천이，병재포기대저부적취；온도시영향생물강해적중요인소，당온도위18℃시，은정강해솔최대위48．2μg／L；해균주최괄의강해적사록화탄림용강도위42．3μg／L ，차시균주능정상지진행생물대사；25 g／L적포도당대미생물강해유촉진작용，은정강해솔체44．3％。
Biodegradation is the main way to disintegrate organic pollutants in soil and groundwater .Soil samples of contam-inated sites are used to analyze its physical properties of organic carbon content ,bulk density ,density ,void ratio and satu-ration moisture contents and also they are made into experimental soil column ,which is applied to simulate the vertical mi-gration patterns of carbon tetrachloride (CT ) in unsaturated zone and its dynamic biodegradation .The results show that car-bon tetrachloride migrates with eluviation and accumulates in the bottom of the unsaturated zone .Temperature is the impor-tant factor affecting biodegradation and when temperature is 18 ℃ ,the maximum degradation rate is 48 .2μg/L under steady state .For this strain ,the most suitable degraded concentration of carbon tetrachloride is 42 .3 μg/L and at this time ,this strain can normally conduct biological metabolism .Meanwhile glucose with concentration 25 g/L can promote microbial degradation and the degradation rate can reach 44 .3% under steady state .