详细信息

生物表面活性剂皂角苷对菲在水和土壤间分配行为影响     被引量:1

Effect of Biosurfactant(Saponin) on Distribution of Phenanthrene and Naphthalene between Water and Soil

文献类型:期刊文献

中文题名:生物表面活性剂皂角苷对菲在水和土壤间分配行为影响

英文题名:Effect of Biosurfactant(Saponin) on Distribution of Phenanthrene and Naphthalene between Water and Soil

作者:童丹[1];陈慧[2]

第一作者:童丹

机构:[1]定西师范高等专科学校生化系,甘肃定西743000;[2]西北师范大学化学化工学院,甘肃兰州730070

第一机构:甘肃中医药大学定西校区

年份:2012

卷号:35

期号:10

起止页码:62

中文期刊名:环境科学与技术

外文期刊名:Environmental Science & Technology

收录:CSTPCD;;北大核心:【北大核心2011】;CSCD:【CSCD_E2011_2012】;

语种:中文

中文关键词:皂角苷;菲;分配行为;土壤;生物表面活性剂

外文关键词:saponin; phenanthere; partition; soil; biosurfactant

摘要:文章比较研究了皂角苷(saponin)、Triton X-100以及二者的混合物对多环芳烃菲在土壤和水相间分配行为的影响。结果表明,在所选择的表面活性剂中,皂角苷对菲在水和土壤间的分配具有最强的增溶能力。在竞争吸附的作用下,随着加入的表面活性剂的量不同,菲在水和土壤间的分配行为也有差异。当表面活性剂的浓度较低时,促进菲在土壤上的吸附;当加入的表面活性剂的量超过其临界胶束浓度(CMC)时,菲在水和土壤间的分配系数随着表面活性剂浓度的增大出现持续减小的趋势。并且在相同浓度下,皂角苷和TritonX-100组成的混合表面活性剂的增溶能力比单独使用非离子表面活性剂Triton X-100强。同样在混合表面活性剂的协同增溶作用下,菲在水和土壤间的分配系数随着表面活性剂浓度的增加出现持续减小的趋势。
Effects of saponin,Triton X-100 and their mixtures on partition of phenanthrene between aqueous phase and soil were studied.Saponin exhibits the largest solubilization content among the selected surfactants.Phenanthrene distributions between the immobile and mobile phases varied with surfactant dosage because of competition between sorbed and micellar surfactants for PAH partitioning.Distribution coefficients decreased with increasing surfactant concentrations after the critical mucilage concentration(CMC) of surfactants.Solubilization by mixed saponin and Triton X-100 were much larger than that by single nonionic one when initial dosages of surfactants were the same.

参考文献:

正在载入数据...

版权所有©甘肃中医药大学 重庆维普资讯有限公司 渝B2-20050021-8 
渝公网安备 50019002500408号 违法和不良信息举报中心