Bioavailability of phenanthrene and nitrobenzene sorbed on carbonaceous   materials

doi:10.1016/j.carbon.2016.09.044

CORC > 北京大学 > 城市与环境学院

	Bioavailability of phenanthrene and nitrobenzene sorbed on carbonaceous materials
	Zhang, Meng ; Shen, Xiaofang ; Zhang, Haiyun ; Cai, Fei ; Chen, Weixiao ; Gao, Qian ; Julio Ortega-Calvo, J. ; Tao, Shu ; Wang, Xilong
刊名	CARBON
	2016
关键词	POLYCYCLIC AROMATIC-HYDROCARBONS ACTIVATED CARBON ORGANIC CONTAMINANTS MYCOBACTERIUM SP BLACK CARBON MICROBIAL AVAILABILITY MOLECULAR SIMULATION SOIL SLURRIES NANOTUBES ADSORPTION
DOI	10.1016/j.carbon.2016.09.044
英文摘要	To better understand the mechanisms regarding effects of the interactions between organic contaminants (ORCs) and carbonaceous materials (CMs) on bioavailability of ORCs, 22 mg/kg of phenanthrene and nitrobenzene were spiked onto various CMs, and their microbial mineralization by the bacterium Mycobacterium vanbaalenii PYR-1 was investigated. The results showed that as sorption of phenanthrene and nitrobenzene to CMs increased 4.5 and 42.3 times, their freely dissolved concentrations (C-free) decreased by 80.4% and 97.0%, respectively. Correspondingly, the maximum mineralization rate was reduced by 99.6% for phenanthrene and 98.2% for nitrobenzene. Functionalization of multiwalled carbon nanotubes (CNTs) with hydrophilic polar moieties greatly weakened sorption of phenanthrene and nitrobenzene. Correspondingly, the reduction in mineralization of them preloaded on CNTs was more modest. However, bioavailability of CM-sorbed phenanthrene and nitrobenzene was not solely controlled by C-free. Model calculations of mineralization kinetics data and electron microscopy observations of CMs evidenced that bacteria access to sorbed phenanthrene and nitrobenzene through cell attachment to the particle surfaces, but this process was CM dependent. This work highlights the factors and underlying mechanisms governing microbial availability of ORCs sorbed on CMs, which is significant for risk assessment of ORCs and possible application of CMs for ORC pollution control through sequestration. (C) 2016 Elsevier Ltd. All rights reserved.; National Science Fund for Distinguished Young Scientist [41525005]; 973 Program [2014CB441104]; National Natural Science Foundation of China [41271461, 41629101, 41390240, 41130754]; 111 Program [B14001]; Spanish Ministry of Economy and Competitiveness [CGL2013-44554-R]; SCI(E); EI; ARTICLE; xilong@pku.edu.cn; 404-413; 110
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/449963]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zhang, Meng,Shen, Xiaofang,Zhang, Haiyun,et al. Bioavailability of phenanthrene and nitrobenzene sorbed on carbonaceous materials[J]. CARBON,2016.
APA	Zhang, Meng.,Shen, Xiaofang.,Zhang, Haiyun.,Cai, Fei.,Chen, Weixiao.,...&Wang, Xilong.(2016).Bioavailability of phenanthrene and nitrobenzene sorbed on carbonaceous materials.CARBON.
MLA	Zhang, Meng,et al."Bioavailability of phenanthrene and nitrobenzene sorbed on carbonaceous materials".CARBON (2016).