化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2015年
7期
2361-2369
,共9页
陈然然%祝欣%林玉锁%余冉%龙涛
陳然然%祝訢%林玉鎖%餘冉%龍濤
진연연%축흔%림옥쇄%여염%룡도
氯代有机物%污染场地%MNA%自然衰减%修复%生物过程%降解
氯代有機物%汙染場地%MNA%自然衰減%脩複%生物過程%降解
록대유궤물%오염장지%MNA%자연쇠감%수복%생물과정%강해
chlorinated organics compounds%contaminated site%MNA%natural attenuation%remediation%bioprocess%degradation
氯代有机物因其高毒性、高富集性、高环境残留的特点及其“致癌、致畸、致突变”效应被美国环保局(EPA)列为优先控制污染物。氯代有机物污染场地的传统物理、化学、生物修复方式修复费用相对较高,对污染场地周边环境影响较大。监控自然衰减(MNA)是一种国际上应用较广的污染场地修复和管理技术,近年来在我国逐渐得到关注,其利用污染物自身的自然衰减作用达到修复目标,从而降低修复成本,规避工程风险。本文重点介绍监控自然衰减技术,并结合氯代有机物自然衰减过程中的生物降解作用、降解途径与机理、主要降解菌和酶等要素对氯代有机物污染场地实施监控自然衰减修复的可行性进行初步探究。
氯代有機物因其高毒性、高富集性、高環境殘留的特點及其“緻癌、緻畸、緻突變”效應被美國環保跼(EPA)列為優先控製汙染物。氯代有機物汙染場地的傳統物理、化學、生物脩複方式脩複費用相對較高,對汙染場地週邊環境影響較大。鑑控自然衰減(MNA)是一種國際上應用較廣的汙染場地脩複和管理技術,近年來在我國逐漸得到關註,其利用汙染物自身的自然衰減作用達到脩複目標,從而降低脩複成本,規避工程風險。本文重點介紹鑑控自然衰減技術,併結閤氯代有機物自然衰減過程中的生物降解作用、降解途徑與機理、主要降解菌和酶等要素對氯代有機物汙染場地實施鑑控自然衰減脩複的可行性進行初步探究。
록대유궤물인기고독성、고부집성、고배경잔류적특점급기“치암、치기、치돌변”효응피미국배보국(EPA)렬위우선공제오염물。록대유궤물오염장지적전통물리、화학、생물수복방식수복비용상대교고,대오염장지주변배경영향교대。감공자연쇠감(MNA)시일충국제상응용교엄적오염장지수복화관리기술,근년래재아국축점득도관주,기이용오염물자신적자연쇠감작용체도수복목표,종이강저수복성본,규피공정풍험。본문중점개소감공자연쇠감기술,병결합록대유궤물자연쇠감과정중적생물강해작용、강해도경여궤리、주요강해균화매등요소대록대유궤물오염장지실시감공자연쇠감수복적가행성진행초보탐구。
Due to the high toxicity, potential of biological accumulation, recalcitrance to degradation and the known carcinogenic/teratogenic/mutagenic effects, the chlorinated organic compounds have been listed as priority controlled pollutants by the United States Environmental Protection Agency (EPA). In view of chlorinated pollutants contaminated sites, the traditional physical, chemical and biological remediation methods often impose relatively high costs and considerable impacts on the surrounding environment. The monitored natural attenuation (MNA) is an effective technology for site remediation and management and has been widely used internationally, which gradually attracts more and more attentions in China in recent years. It relies on the intrinsic potential of the pollutants to degrade naturally to meet the remediation requirements, and thereby would reduce treatment costs and lower on-site project risks. This paper focuses on the introduction of MNA technology, as well as the characteristics of chlorinated organic compounds such as the biodegradation pathways and mechanisms during the process of natural attenuation, the main degradation microbial communities and the key biodegradation enzymes. A preliminary discussion on the suitability of implementing MNA remediation on chlorinated organic compounds contaminated sites is provided.