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中国博士后科学基金(20070420094)

作品数:3 被引量:10H指数:2
相关作者:张卫徐圣友张大年施倬嘉乔建江更多>>
相关机构:华东理工大学更多>>
发文基金:中国博士后科学基金国家自然科学基金国家高技术研究发展计划更多>>
相关领域:环境科学与工程农业科学更多>>

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Removal of Pyrene from Contaminated Soils by White Clover被引量:5
2009年
Phytoremediation has been used as an emerging technology for remediation of soil contamination with polycyclic aromatic hydrocarbons(PAHs),ubiquitous persistent environmental pollutants derived from natural and anthropogenic processes,in the last decade.In this study,a pot experiment was conducted to investigate the potential of phytoremediation of pyrene from spiked soils planted with white clover(Trifolium repens)in the greenhouse with a series of pyrene concentrations ranging from 4.22 to 365.38 mg kg-1.The results showed that growth of white clover on pyrenecontaminated soils was not affected.The removal of pyrene from the spiked soils planted with white clover was obviously higher than that from the unplanted soils.At the end of the experiment(60 d),the average removal ratio of pyrene in the spiked soils with white clover was 77%,which was 31%and 57%higher than those of the controls with or without micobes, respectively.Both roots and shoots of white clover took up pyrene from the spiked soils and pyrene uptake increased with the soil pyrene concentration.However,the plant-enhanced dissipation of soil pyrene may be the result of plant-promoted microbial degradation and direct uptake and accumulation of pyrene by white clover were only a small part of the pyrene dissipation.Bioconcentration factors of pyrene(BCFs,ratio of pyrene,on a dry weight basis,in the plant to that in the soil)tended to decrease with increase in the residual soil pyrene concentration.Therefore,removal of pyrene in the contaminated soils was feasible using white clove.
XU Sheng-YouCHEN Ying-XuLIN Kuang-FeiCHEN Xin-CaiLIN QiLI FengWANG Zhao-Wei
关键词:PHYTOREMEDIATIONPYRENE
菲的微生物酶促降解研究被引量:3
2008年
微生物降解是环境中菲去除的重要途径。为有效开展菲污染的微生物酶学治理,采用室内模拟的方法,从菲污染土壤中分离到一株高效降解菌株,研究了其最适产酶条件。结果表明该菌株最适产酶条件为培养温度35℃,培养液起始pH7.0,培养时间60h,而Hg2+对该菌株产酶有显著抑制作用。从该优势菌中提取的粗酶液在pH7.0和30℃时显示最大的降解活性,其米氏常数为50.30nmol·mL-1,最大降解速率为171.33nmol·min-1·mg-1。
陈继章张卫施倬嘉乔建江徐圣友张大年
关键词:酶促降解产酶条件酶性质
硫酸盐还原条件下三氯乙烯的降解研究被引量:2
2009年
三氯乙烯(TCE)是地下水和土壤中主要的有机污染物之一。以受TCE等氯代烃严重污染的地下泥样为材料,采用室内模拟的方法,研究硫酸盐初始质量浓度为100、500、2500mg/L时,硫酸盐对TCE降解的影响。结果表明,高浓度硫酸盐更有利于TCE的降解;在硫酸盐还原条件下,通过添加2-溴乙基磺酸钠抑制产甲烷菌,发现产甲烷菌在TCE的降解过程中起到很重要的作用;硫酸盐浓度变化与TCE降解趋势一致。
章立勇林匡飞徐圣友张卫张梅杨莎莎苏爱华
关键词:三氯乙烯产甲烷菌生物降解
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