PMID- 34252654
OWN - NLM
STAT- MEDLINE
DCOM- 20210930
LR  - 20210930
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 420
DP  - 2021 Oct 15
TI  - Quantitative analysis on the mechanism of Cd(2+) removal by MgCl(2)-modified 
      biochar in aqueous solutions.
PG  - 126487
LID - S0304-3894(21)01452-7 [pii]
LID - 10.1016/j.jhazmat.2021.126487 [doi]
AB  - In this study, a pristine biochar (BC) and MgCl(2)-modified biochar (MBC) were 
      prepared using Pennisetum sp. straw for removing Cd(2+) from aqueous solutions. 
      Scanning electron microscope (SEM) imaging combined with energy dispersive X-ray 
      spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), Fourier transform 
      infrared spectroscopy (FTIR), as well as the surface area and porosity analyses 
      were used to reveal the physico-chemical characteristics of the pristine and 
      modified adsorbents. Results suggested that MgCl(2) impregnation during the 
      synthesis had enhanced the specific surface area and pore volume of the biochar. 
      Batch adsorption experiments indicated that the Cd(2+) adsorption data of MBC 
      fitted the Langmuir isothermal and pseudo-second order kinetic models, indicating 
      a chemical adsorption was undergoing in the system. The maximum adsorption 
      capacity of Cd(2+) on MBC was 763.12 mg/g, which was 11.15 times higher than that 
      of the pristine BC. The Cd(2+) removal by MBC was mainly attributed to the 
      mechanisms in an order: Cd(OH)(2) precipitation (73.43%) > ion exchange 
      (22.67%) > Cd(2+)-pi interaction (3.88%), with negligible contributions from 
      functional group complexation, electrostatic attraction and physical adsorption. 
      The MBC could thus be used as a promising adsorbent for Cd(2+) removal from 
      aqueous solutions.
CI  - Copyright (c) 2021 Elsevier B.V. All rights reserved.
FAU - Yin, Guangcai
AU  - Yin G
AD  - Guangdong Industrial Contaminated Site Remediation Technology and Equipment, 
      Engineering Research Center, School of Environmental Science and Engineering, 
      Guangdong University of Technology, Guangzhou 510006, China.
FAU - Tao, Lin
AU  - Tao L
AD  - Guangdong Industrial Contaminated Site Remediation Technology and Equipment, 
      Engineering Research Center, School of Environmental Science and Engineering, 
      Guangdong University of Technology, Guangzhou 510006, China.
FAU - Chen, Xinglin
AU  - Chen X
AD  - Guangdong Industrial Contaminated Site Remediation Technology and Equipment, 
      Engineering Research Center, School of Environmental Science and Engineering, 
      Guangdong University of Technology, Guangzhou 510006, China.
FAU - Bolan, Nanthi S
AU  - Bolan NS
AD  - College of Engineering, Science and Environment, University of Newcastle, 
      Callaghan, NSW, 2308, Australia; School of Agriculture and Environment, The 
      University of Western Australia, Perth, WA 6001, Australia; The UWA Institute of 
      Agriculture, The University of Western Australia, Perth, WA 6001, Australia.
FAU - Sarkar, Binoy
AU  - Sarkar B
AD  - Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, United 
      Kingdom.
FAU - Lin, Qintie
AU  - Lin Q
AD  - Guangdong Industrial Contaminated Site Remediation Technology and Equipment, 
      Engineering Research Center, School of Environmental Science and Engineering, 
      Guangdong University of Technology, Guangzhou 510006, China.
FAU - Wang, Hailong
AU  - Wang H
AD  - Biochar Engineering Technology Research Center of Guangdong Province, School of 
      Environmental and Chemical Engineering, Foshan University, Foshan 528000, China; 
      Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, 
      Zhejiang A＆F University, Hangzhou 311300, China. Electronic address: 
      hailong.wang@fosu.edu.cn.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20210624
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Water Pollutants, Chemical)
RN  - 0 (biochar)
RN  - 00BH33GNGH (Cadmium)
RN  - 16291-96-6 (Charcoal)
SB  - IM
MH  - Adsorption
MH  - *Cadmium
MH  - Charcoal
MH  - Kinetics
MH  - Spectroscopy, Fourier Transform Infrared
MH  - *Water Pollutants, Chemical
OTO - NOTNLM
OT  - Adsorption
OT  - Cadmium removal
OT  - Engineered biochar
OT  - Surface characterization
OT  - Wastewater treatment
EDAT- 2021/07/13 06:00
MHDA- 2021/10/01 06:00
CRDT- 2021/07/12 20:20
PHST- 2021/04/27 00:00 [received]
PHST- 2021/06/08 00:00 [revised]
PHST- 2021/06/22 00:00 [accepted]
PHST- 2021/07/13 06:00 [pubmed]
PHST- 2021/10/01 06:00 [medline]
PHST- 2021/07/12 20:20 [entrez]
AID - S0304-3894(21)01452-7 [pii]
AID - 10.1016/j.jhazmat.2021.126487 [doi]
PST - ppublish
SO  - J Hazard Mater. 2021 Oct 15;420:126487. doi: 10.1016/j.jhazmat.2021.126487. Epub 
      2021 Jun 24.