PMID- 27607931 OWN - NLM STAT- MEDLINE DCOM- 20180830 LR - 20180830 IS - 1873-3336 (Electronic) IS - 0304-3894 (Linking) VI - 321 DP - 2017 Jan 5 TI - Toxicity mechanisms and synergies of silver nanoparticles in 2,4-dichlorophenol degradation by Phanerochaete chrysosporium. PG - 37-46 LID - S0304-3894(16)30799-3 [pii] LID - 10.1016/j.jhazmat.2016.08.075 [doi] AB - Mechanisms of silver nanoparticles-mediated toxicity to Phanerochaete chrysosporium and the influence of silver nanoparticles (AgNPs) on the biodegradation of 2,4-dichlorophenol (2,4-DCP) have been systematically investigated. AgNPs at low doses (0-60muM) have greatly enhanced the degradation ability of P. chrysosporium to 2,4-DCP with the maximum degradation rates of more than 94%, exhibiting excellent synergies between AgNPs and P. chrysosporium in the degradation of 2,4-DCP. Meanwhile, removal of total Ag was also at high levels and highly pH dependent. However, significant inhibition was highlighted on 2,4-DCP biodegradation and Ag removal upon treatment with AgNPs at high doses and AgNO(3) at low-level exposure. Results also suggested that AgNPs-induced cytotoxicity could arise from the "Trojan-horse" mechanism executing particle effects, ion effects, or both, ruling out extracellularly released Ag(+). Moreover, under relatively low concentrations of AgNPs exposure, 2,4-DCP was broken into linear chain organics, and eventually turned into CO(2) and H(2)O through reductive dechlorination and reaction with hydroxyl radicals. FTIR analysis showed that amino, carboxyl, carbonyl, and sulfur-containing functional groups played crucial roles in Ag transportation and the reduction of Ag(+) to Ag(0). CI - Copyright (c) 2016 Elsevier B.V. All rights reserved. FAU - Huang, Zhenzhen AU - Huang Z AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. FAU - Chen, Guiqiu AU - Chen G AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic address: gqchen@hnu.edu.cn. FAU - Zeng, Guangming AU - Zeng G AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic address: zgming@hnu.edu.cn. FAU - Guo, Zhi AU - Guo Z AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. FAU - He, Kai AU - He K AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. FAU - Hu, Liang AU - Hu L AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. FAU - Wu, Jing AU - Wu J AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. FAU - Zhang, Lihua AU - Zhang L AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. FAU - Zhu, Yuan AU - Zhu Y AD - College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. FAU - Song, Zhongxian AU - Song Z AD - Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China. LA - eng PT - Journal Article DEP - 20160831 PL - Netherlands TA - J Hazard Mater JT - Journal of hazardous materials JID - 9422688 RN - 0 (Chlorophenols) RN - 3M4G523W1G (Silver) RN - R669TG1950 (2,4-dichlorophenol) SB - IM MH - Biodegradation, Environmental MH - Chlorophenols/*metabolism MH - Dose-Response Relationship, Drug MH - Drug Synergism MH - Metal Nanoparticles/*toxicity MH - Oxidation-Reduction MH - Phanerochaete/drug effects/*metabolism MH - Silver/metabolism/pharmacology/*toxicity OTO - NOTNLM OT - 2,4-Dichlorophenol OT - Biodegradation OT - Phanerochaete chrysosporium OT - Silver nanoparticles OT - Synergies EDAT- 2016/09/09 06:00 MHDA- 2018/08/31 06:00 CRDT- 2016/09/09 06:00 PHST- 2016/07/01 00:00 [received] PHST- 2016/08/29 00:00 [revised] PHST- 2016/08/30 00:00 [accepted] PHST- 2016/09/09 06:00 [pubmed] PHST- 2018/08/31 06:00 [medline] PHST- 2016/09/09 06:00 [entrez] AID - S0304-3894(16)30799-3 [pii] AID - 10.1016/j.jhazmat.2016.08.075 [doi] PST - ppublish SO - J Hazard Mater. 2017 Jan 5;321:37-46. doi: 10.1016/j.jhazmat.2016.08.075. Epub 2016 Aug 31.