摘要
采用水池栽培水葱(ScirpustabernaemontaniGmel),研究了该植物对土壤中五氯酚(PCP)的生物富集能力。结果表明,供试污染土壤中五氯酚的起始浓度为2000.00μg.kg-1,经30、60、90、120d后种植水葱培养池土壤中五氯酚的含量分别为起始浓度的28.34%、1.03%、0.86%和0.088%;而对照未种植水葱的培养池土壤中五氯酚的含量分别为起始浓度的95.09%、81.17%、71.32%和63.75%;水葱根部五氯酚的含量由起始的579.55μg.kg-1,30d后达到最高富集量即2090.00μg.kg-1,由此证实水葱对五氯酚具有一定的富集能力。因此,利用水葱修复土壤中难降解有机污染物五氯酚是一项可行的技术。
Phytoremediation is a cost-effective method to detoxify the contaminated soil by organic matter. The ability of Chinese shallot （Scirpus tabernaemontani Gruel）to bioaccumulate PCP from soil was investigated. When the initial fortification concentration was 2 000.00 μg·kg^-1 in soil, the recovered residues of PCP in shallot-planted soll only accounted for 28.34% and 1.03% of the initial level at 30 and 60 clays after treatment （DAT）, respectively, and completely disappeared （〉99.00%） after 90 days. In contrast, the concentrations of PCP in treatment without grown shallot represented 95.09%, 81.17%, 71.32% and 63.75% of the initial level at 30, 60, 90, and 120 DAT respectively. The dynamics of PCP could be well described by the first-order kinetic equation in both shallot-planted and unplanted treatment, and the correspondingly estimated half-lives were 11.83 days and 173.25 days, respectively. The PCP degradation in shallot-planted soil approximately was 15 times of that in unplanted soil. In addition, it was also monitored that PCP residue （579.55 μg·kg^-1） in shallot root at the beginning of the experiment increased and reached the peak of 2 090.00 μg·kg^-1 at 30 DAT. These resuhs demonstrated that shallot had a high bioaccumulation capacity for PCP and could he used as a good alternative plant to remediate PCP-polluted soil or sediment in water system.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2006年第6期1493-1497,共5页
Journal of Agro-Environment Science
基金
教育部科学技术研究重点项目(教技司[2005]41号)
留学回国基金(教外司留[2004]527号)
关键词
水葱
五氯酚
生物富集
衍生化
残留量
Scirpus tabernaemontani Gmel
pentachlorophenol
bioaccumulation
derivatization
residue
