PMID- 36657575
OWN - NLM
STAT- MEDLINE
DCOM- 20230207
LR  - 20230207
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 317
DP  - 2023 Mar
TI  - Response mechanisms of anaerobic fermentative sludge to zinc oxide nanoparticles 
      during medium-chain carboxylates production from waste activated sludge.
PG  - 137879
LID - S0045-6535(23)00146-7 [pii]
LID - 10.1016/j.chemosphere.2023.137879 [doi]
AB  - The conversion of waste activated sludge (WAS) into medium chain carboxylates 
      (MCCs) has attracted much attention, while investigations of the impacts of ZnO 
      nanoparticles (NPs) on this process are sparse. The present study showed that 8 
      mg/g-TSS of ZnO NPs have little effects on all key steps and the activity of 
      anaerobes, and finally leading to unchanged MCCs production. Although 30 mg/g-TSS 
      of ZnO NPs weakly inhibited the hydrolysis, acidogenesis, and chain elongation 
      process, WAS solubilization was enhanced, thus, the improvement was enough to 
      offset inhibition, also resulting in an insignificant impact on overall MCCs 
      production. However, the improvement with ZnO NPs dosages above 100 mg/g-TSS was 
      not sufficient to offset the biological inhibition, thus inducing negative impact 
      on overall MCCs production. The decline of EPS induced by Zn(2+) and generation 
      of excessive reactive oxygen species (ROS) were the main factors responsible for 
      the inhibitory effects of ZnO NPs on lower activity of anaerobes. For chain 
      elongation process, the discriminative Clostridium IV (as MCCs-forming bacteria) 
      with a strong adaptation to ZnO NPs (300 mg/g-TSS) was observed. The present 
      study provided a deep understanding related to the effects of ZnO NPs on the 
      production of MCCs production from WAS and identified a zinc resistance anaerobe, 
      which would be significant for the evaluation of influence and alleviation of 
      inhibition induced by ZnO NPs on the carbon cycle of organic wastes.
CI  - Copyright (c) 2023 Elsevier Ltd. All rights reserved.
FAU - Liu, Chao
AU  - Liu C
AD  - Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water 
      Quality and Conservation of the Pearl River Delta, Ministry of Education, 
      Guangzhou University, Guangzhou, 510006, PR China; National-Regional Joint 
      Engineering Research Center for Soil Pollution Control and Remediation in South 
      China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution 
      Control and Management, Institute of Eco-environmental and Soil Sciences, 
      Guangdong Academy of Sciences, Guangzhou 510650, China. Electronic address: 
      cliu@soil.gd.cn.
FAU - Usman, Muhammad
AU  - Usman M
AD  - Bioproducts Science & Engineering Laboratory (BSEL), Department of Biological 
      Systems Engineering, Washington State University (WSU), Richland, WA, USA.
FAU - Ji, Mengyuan
AU  - Ji M
AD  - Department of Biology, University of Padua, Via U. Bassi 58/b, 35121, Padova, 
      Italy.
FAU - Sha, Jun
AU  - Sha J
AD  - State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of 
      Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
FAU - Zhou, Li
AU  - Zhou L
AD  - Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water 
      Quality and Conservation of the Pearl River Delta, Ministry of Education, 
      Guangzhou University, Guangzhou, 510006, PR China. Electronic address: 
      zhoul@gzhu.edu.cn.
FAU - Yan, Bing
AU  - Yan B
AD  - Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water 
      Quality and Conservation of the Pearl River Delta, Ministry of Education, 
      Guangzhou University, Guangzhou, 510006, PR China.
LA  - eng
PT  - Journal Article
DEP - 20230116
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - SOI2LOH54Z (Zinc Oxide)
RN  - 0 (Sewage)
RN  - 0 (Carboxylic Acids)
SB  - IM
MH  - *Zinc Oxide/pharmacology
MH  - Sewage/microbiology
MH  - Anaerobiosis
MH  - Waste Disposal, Fluid/methods
MH  - *Nanoparticles
MH  - Bacteria, Anaerobic
MH  - Carboxylic Acids
OTO - NOTNLM
OT  - Anaerobic fermentation
OT  - MCCs-forming bacteria
OT  - Medium chain carboxylates
OT  - Waste activated sludge
OT  - ZnO nanoparticles
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/01/20 06:00
MHDA- 2023/02/08 06:00
CRDT- 2023/01/19 19:23
PHST- 2022/09/17 00:00 [received]
PHST- 2023/01/10 00:00 [revised]
PHST- 2023/01/13 00:00 [accepted]
PHST- 2023/01/20 06:00 [pubmed]
PHST- 2023/02/08 06:00 [medline]
PHST- 2023/01/19 19:23 [entrez]
AID - S0045-6535(23)00146-7 [pii]
AID - 10.1016/j.chemosphere.2023.137879 [doi]
PST - ppublish
SO  - Chemosphere. 2023 Mar;317:137879. doi: 10.1016/j.chemosphere.2023.137879. Epub 
      2023 Jan 16.