生物表面活性剂去除工业区土壤甲醛的研究

Study on the Removal of Formaldehyde in Soil from Industry Park by Biosurfactant

甲醛为I类致癌物,在土壤环境中稳定,并能通过迁移扩大污染。工业企业区土壤中吸附的甲醛含量可高达180-720mg/kg干土。本研究针对部分工业企业区土壤中甲醛含量高的现状,利用生物表面活性剂对土壤中甲醛污染物进行去除。实验探讨了茶皂素的浓度、pH、反应时间和反应温度对甲醛去除率的影响,并采用正交实验进行优化。实验结果表明:在茶皂素浓度为5.0g/L,反应温度为60℃,pH为4.00,反应时间12h下,甲醛去除率为99.17%。说明茶皂素对土壤中的甲醛有很好去除效果。

Formaldehyde is a I kind of carcimogens.It is stable in soil encironment and expanding the pollution by migration In some industrial enterprise areas, the content of the formaldehyde adsorppted from so//was up to 180--720mg/kg dry soil. The study was mainly for the situation of high content of formaldehyde in industrial enterprise areas, remobing the formaldehyde in the so//by biosurfactants.The experimental explored the effced of tea saponin concentration, pH, reaction time and reaction temperature on removal rate of formaldehyde and adopt orthogonal experiment to optimize. The experimental resuIts showed that under tea saponin concentration of 5.0 g/L, reaction temperature of 60℃, pH of 4.00, reaction time of 12h, the formaldehyde removal rate was 99.17%. In addition tea sapenin have a good re- moval for formaldehyde in soil