环境科技
環境科技
배경과기
ENVIRONMENTAL SCIENCE AND TECHNOLOGY
2014年
5期
12-15
,共4页
水芹%多环芳烃%植物修复
水芹%多環芳烴%植物脩複
수근%다배방경%식물수복
Watercress%PAHs%Phytoremediation
利用盆栽实验研究了水芹对某实际多环芳烃(PAHs)污染场地土壤的修复作用。通过75 d的温室培养试验,对污染土壤和植物根、茎中PAHs的含量进行测定。结果显示种植水芹的土壤中PAHs的去除量要显著高于对照土壤,并且水芹促进微生物降解是其去除土壤PAHs的主要途径,占到了PAHs去除总量的99%以上。水芹较易吸收2~4环PAHs,而易促进3~6环PAHs的微生物降解。芘在水溶液中的增溶实验表明,脂溶性根系物质利用其表面活性能够提高对PAHs生物可利用性,从而促进土壤中微生物对PAHs的降解。
利用盆栽實驗研究瞭水芹對某實際多環芳烴(PAHs)汙染場地土壤的脩複作用。通過75 d的溫室培養試驗,對汙染土壤和植物根、莖中PAHs的含量進行測定。結果顯示種植水芹的土壤中PAHs的去除量要顯著高于對照土壤,併且水芹促進微生物降解是其去除土壤PAHs的主要途徑,佔到瞭PAHs去除總量的99%以上。水芹較易吸收2~4環PAHs,而易促進3~6環PAHs的微生物降解。芘在水溶液中的增溶實驗錶明,脂溶性根繫物質利用其錶麵活性能夠提高對PAHs生物可利用性,從而促進土壤中微生物對PAHs的降解。
이용분재실험연구료수근대모실제다배방경(PAHs)오염장지토양적수복작용。통과75 d적온실배양시험,대오염토양화식물근、경중PAHs적함량진행측정。결과현시충식수근적토양중PAHs적거제량요현저고우대조토양,병차수근촉진미생물강해시기거제토양PAHs적주요도경,점도료PAHs거제총량적99%이상。수근교역흡수2~4배PAHs,이역촉진3~6배PAHs적미생물강해。비재수용액중적증용실험표명,지용성근계물질이용기표면활성능구제고대PAHs생물가이용성,종이촉진토양중미생물대PAHs적강해。
The study focus on the remediation effect of watercress on a PAH-contaminated site soil using potted experiment. Based on 75 d greenhouse cultivation, PAHs were determined in the contaminated soil and plant roots, stems. The results showed that the removal of PAHs in soil planted with watercress is significantly higher than that in control soil, and watercress promoting microbial degradation is the main way to remove PAHs from soil, which accounts for over 99% of total PAHs removal. Watercress is easier to take up 2~4 ring PAHs and promote microbial degradation of 3~6 ring PAHs. Aqueous solubilization experiment showed that lipid-soluble root substance can improve the bioavailability of pyrene by its surface activity, thereby contributing to soil microbial degradation of PAHs.