Biomineralized nanoparticles for the immobilization and degradation of crude oil-contaminated soil  

作　　者：Daoqing Liu Qianwei Li Enhui Liu Miao Zhang Jicheng Liu Chunmao Chen 

机构地区：[1]Key Laboratory of Water and Sediment Sciences(Ministry of Education),College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [2]State Key Laboratory of Heavy Oil Processing,State Key Laboratory of Petroleum Pollution Control,China University of Petroleum(Beijing),Beijing 102249,China

出　　处：《Nano Research》2023年第10期12238-12245,共8页纳米研究（英文版）

基　　金：the National Natural Science Fundation of China(Nos.U20A20146 and 22278434);the Fundamental Research Funds for the Central Universities(No.2462023BJRC006);the National Key Research and Development Program of China(No.2019YFC1806201-01).

摘　　要：Accidental oil leaks and spills often cause server soil pollution,and in situ remediation is a powerful and economical treatment technology.While during in situ remediation process,unpredicted migration of petroleum hydrocarbon in heterogeneous soil will lead to a long-term source of persistent aquifer contamination.To reduce the migration of petroleum hydrocarbon and effectively improve the in situ remediation efficiency,herein,fungal biomineralization strategy was proposed for the immobilization of petroleum contaminants.A ureolytic fungi strain with crude oil-degradation ability was screened and identified as Chaetomium globosum.When incubated in medium containing Ca2+and crude oil,a mineral corona with spiny nanoparticles was formed at the edge of oil and the interface characters were analyzed using fluorescent pH and dissolved oxygen(DO)sensing films,respectively.Results indicated that biominerals preferred to aggregate around the edge of crude oil,providing favorable microenvironment for fungal growth and then leading to the increase of pH in the microenvironment,eventually accompanied by the formation of mineral corona.The mineral corona with numerous nanoparticles may act as a solid and stable shell,limiting or reducing the mobility of crude oil,and providing enough time for fungal biodegradation.After 28 days incubation,oilcontaminated soil treated with fungal biomineralization showed better immobilization ability for total petroleum hydrocarbon(TPH)under simulated acid-rain condition and higher TPH removal efficiency.This is the first demonstration for the immobilization of oil through fungal biomineralized nanoparticles,thus providing a novel strategy for the in situ remediation of oilcontaminated sites.

关 键 词：BIOMINERALIZATION DEGRADATION nanomineral NANOAGGREGATES IMMIGRATION 

分 类 号：TB383[一般工业技术—材料科学与工程]