PMID- 36833784
OWN - NLM
STAT- MEDLINE
DCOM- 20230228
LR  - 20231119
IS  - 1660-4601 (Electronic)
IS  - 1661-7827 (Print)
IS  - 1660-4601 (Linking)
VI  - 20
IP  - 4
DP  - 2023 Feb 10
TI  - Reduction of Hexavalent Chromium from Soil of the Relocated Factory Area with 
      Rice Straw Hydrothermal Carbon Modified by Nano Zero-Valent Iron (nZVI).
LID - 10.3390/ijerph20043089 [doi]
LID - 3089
AB  - In order to reduce the content of Cr(VI) in the soil of the relocated chromium 
      salt factory, the rice straw-derived hydrothermal carbon was prepared by 
      hydrothermal method and loaded with nano zero-valent iron generated by liquid 
      phase reduction, which effectively alleviated the self-aggregation problem of 
      nano zero-valent iron (nZVI) in the treatment of Cr(VI) and improved the Cr(VI) 
      reduction rate without changing the soil structure. The reduction effect of 
      Cr(VI) in soil by key influencing factors such as carbon-iron ratio, initial pH 
      value, and initial temperature was investigated. The results showed that nZVI 
      modified hydro-thermal carbon composite (named RC-nZVI) had a good reduction 
      effect on Cr(VI). Scanning electron microscope (SEM) and energy spectrum analysis 
      showed that nZVI was evenly distributed on the surface of hydrothermal carbon, 
      which effectively reduced the agglomeration of iron. Under the conditions of C/Fe 
      = 1:2, 60  degrees C, with pH of 2, the average Cr(VI) content in soil decreased from 
      182.9 mg kg(-1) to 21.6 mg kg(-1). Adsorption kinetics of Cr(VI) by RC-nZVI fit 
      well with the pseudo-second-order model, and the kinetic velocity constant 
      revealed that Cr(VI) reduction rate decreased with increasing initial Cr(VI) 
      concentration. Cr(VI) reduction by RC-nZVI was mainly dominated by chemical 
      adsorption.
FAU - Zhong, Wei
AU  - Zhong W
AD  - Department of Chemistry and Chemical Engineering, Chongqing University of 
      Technology, Chongqing 400054, China.
FAU - Bai, Weiyang
AU  - Bai W
AD  - Department of Chemistry and Chemical Engineering, Chongqing University of 
      Technology, Chongqing 400054, China.
FAU - Li, Gang
AU  - Li G
AD  - Department of Chemistry and Chemical Engineering, Chongqing University of 
      Technology, Chongqing 400054, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20230210
PL  - Switzerland
TA  - Int J Environ Res Public Health
JT  - International journal of environmental research and public health
JID - 101238455
RN  - 7440-44-0 (Carbon)
RN  - 18540-29-9 (chromium hexavalent ion)
RN  - E1UOL152H7 (Iron)
RN  - 0 (Soil)
RN  - 0 (Water Pollutants, Chemical)
RN  - 0R0008Q3JB (Chromium)
SB  - IM
MH  - Carbon
MH  - *Oryza
MH  - Iron/chemistry
MH  - Soil/chemistry
MH  - *Water Pollutants, Chemical/analysis
MH  - Chromium/analysis
MH  - Adsorption
PMC - PMC9967011
OTO - NOTNLM
OT  - adsorption kinetics
OT  - hexavalent chromium
OT  - hydrothermal carbon
OT  - nano zero-valent iron
OT  - rice straw
COIS- The authors declare no conflict of interest.
EDAT- 2023/02/26 06:00
MHDA- 2023/03/03 06:00
PMCR- 2023/02/10
CRDT- 2023/02/25 02:23
PHST- 2022/12/31 00:00 [received]
PHST- 2023/02/06 00:00 [revised]
PHST- 2023/02/07 00:00 [accepted]
PHST- 2023/02/25 02:23 [entrez]
PHST- 2023/02/26 06:00 [pubmed]
PHST- 2023/03/03 06:00 [medline]
PHST- 2023/02/10 00:00 [pmc-release]
AID - ijerph20043089 [pii]
AID - ijerph-20-03089 [pii]
AID - 10.3390/ijerph20043089 [doi]
PST - epublish
SO  - Int J Environ Res Public Health. 2023 Feb 10;20(4):3089. doi: 
      10.3390/ijerph20043089.