摘要
采用室内模拟试验,研究追加葡萄糖、DL-苹果酸、柠檬酸三钠、脲和乙酸铵碳源刺激下对老化污染土壤中PAHs的降解规律.结果表明,培养第1周内,添加碳源处理土壤CO2的释放量显著大于对照,其中外加DL-苹果酸处理土壤所释放的CO2量最大.各处理CO2的平均释放量顺序为脲>葡萄糖≈柠檬酸三钠≈DL-苹果酸≈乙酸铵>对照.添加碳源处理土壤所挥发的PAHs要显著小于对照,且3种PAHs的挥发量大小顺序为菲>荧蒽>苯并(b)荧蒽.添加碳源处理土壤中菲、荧蒽及苯并(b)荧蒽的平均降解速度均大于对照,其中添加DL-苹果酸和脲处理土壤中菲、荧蒽及苯并(b)荧蒽的降解较快.3种PAHs化合物之间相比较,苯并(b)荧蒽的残留比例最大,在72%～81%之间;其次为荧蒽,在53%～70%之间;菲最少,在27%～44%之间.
This study was conducted with different additional carbon sources（such as： glucose,DL-malic acid,citrate,urea and ammonium acetate） to elucidate the degradation of polycyclic aromatic hydrocarbons（PAHs） in aged contaminated soil under an indoor simulation experiment.The results showed that the quantity of CO2 emission in different additional carbon sources treatments was obviously much more than that of check treatment in the first week,and the quantity of CO2 emission in DL-malic acid treatment was the largest.The average CO2 production decreased in an order ureaglucose≈citrate≈DL-malic acid≈ammonium acetatecheck.Meanwhile,the amount of volatized PAHs in applied carbon sources treatments was significantly less than that in check treatment.The amount of three volatized PAHs decreased in an order phenanthrenefluoranthenebenzo（b）fluoranthene.Compared with the check treatment,the average degradation rates of the three PAHs were significantly augmented in the supplied carbon sources treatments,in which rates of the three PAHs were much higher in DL-malic acid and urea treatments than those in other treatments.The largest proportion of residual was benzo（b）fluoranthene（from 72% to 81%） among three PAHs compounds,followed by fluoranthene（from 53% to 70%） and phenanthrene（from 27% to 44%）.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2012年第2期633-639,共7页
Environmental Science
基金
国家自然科学基金重点项目(41030531)
国家自然科学基金创新研究群体项目(40921061)
湖北省教育厅科学技术研究计划优秀中青年人才项目(Q20093001)
湖北省教育厅科学技术研究计划指导性项目(B20093003)
黄石理工学院引进人才项目(10yjz04R)
关键词
多环芳烃
土壤污染
生物刺激
外加碳源
降解
polycyclic aromatic hydrocarbons
soil contamination
biostimulation
additional carbon sources
degradation
作者简介
尹春芹（1978-），女，博士，主要研究方向为环境化学与污染控制，E-mail：yinehunqin@126．com
通讯联系人，E-mail：jiangxin@issas．ac．cn
