多溴联苯醚污染土壤的新型强化修复技术

发布时间：2018-06-30 03:07

本文选题：PBDEs + 电气石类芬顿　；参考：《中国环境科学》2017年10期

【摘要】：为建立表面活性剂和营养盐强化电气石类芬顿联合微生物对PBDEs污染的高效土壤修复技术,分别选择两种氮源营养盐——氯化铵和硝酸铵,两种表面活性剂——TW-80和TX-100,考察它们的剂量及类型对电气石类芬顿去除土壤PBDEs效果及土壤真菌的影响.结果表明,高剂量的营养盐更能促进电气石类芬顿辅助微生物对PBDEs的降解,且修复效率最高可达75%;两种表面活性剂均能够促进电气石类芬顿辅助微生物对PBDEs的降解,降解效率最高可达76%.并且针对不同单体BDE,营养盐和表面活性剂均对促进低溴代联苯醚降解程度更高.氯化铵比硝酸铵更有利于土壤中微生物生长,且高浓度的营养盐促进土壤中真菌的生长和活性效果明显;TW-80比TX-100更有利于微生物生长,且较低浓度的表面活性剂促进土壤中真菌活性的效果更为明显.因此,不同类型营养盐和表面活性剂能够有效地强化电气石类芬顿联合微生物对PBDEs污染的土壤修复技术.
[Abstract]:In order to establish a highly efficient soil remediation technique for PBDEs polluted by surfactants and nutrients, two nitrogen source nutrient salts, ammonium chloride and ammonium nitrate, were selected, respectively, in which tourmaline Fenton combined with microorganisms was used to remediate PBDEs. Two surfactants, TW-80 and TX-100, were used to investigate the effects of their dosage and type on removal of PBDEs from soil by tourmaline Fenton. The results showed that high dose of nutrients could promote the degradation of PBDEs by tourmaline Fenton assisted microbes, and the remediation efficiency of PBDEs could be as high as 75.The two surfactants could promote the degradation of tourmaline Fenton assisted microbes to PBDEs. The highest degradation efficiency was 76%. For different monomers of BDEs, both nutrients and surfactants could promote the degradation of low brominated diphenyl ethers. Ammonium chloride is more favorable to the growth of microorganisms in soil than ammonium nitrate, and high concentration of nutrients can promote the growth and activity of fungi in soil. TW-80 is more favorable to microbial growth than TX-100. The effect of low concentration surfactant on fungal activity in soil was more obvious. Therefore, different types of nutrients and surfactants can effectively enhance the soil remediation technology of tourmaline Fenton combined with microorganisms to PBDEs.
【作者单位】：南开大学环境科学与工程学院环境污染过程及基准教育部重点实验室天津市环境修复和控制实验室;
【基金】：国家自然科学基金资助项目(41673104) 天津市重点项目(17JCZDJC39600) 国家“973”项目(2014CB441104)
【分类号】：X53

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