PMID- 30193165
OWN - NLM
STAT- MEDLINE
DCOM- 20181127
LR  - 20181127
IS  - 1090-2414 (Electronic)
IS  - 0147-6513 (Linking)
VI  - 165
DP  - 2018 Dec 15
TI  - Biosorption of copper, zinc, cadmium and chromium ions from aqueous solution by 
      natural foxtail millet shell.
PG  - 61-69
LID - S0147-6513(18)30822-4 [pii]
LID - 10.1016/j.ecoenv.2018.08.084 [doi]
AB  - The industrial effluents discharge including heavy metals drain into the river, 
      which has given rise to many problems of hazarding aquatic ecosystems and human 
      health. Biosorption serves as the adsorption of heavy metals onto a natural 
      adsorbent, it is becoming a potential alternative for toxic metals removal from 
      industrial effluents in the last decades. The objectives of present research were 
      to investigate the biosorption behaviors and the mechanisms of copper (Cu), zinc 
      (Zn), cadmium (Cd) and chromium (Cr) ions, respectively onto foxtail millet shell 
      as a new natural biosorbent in aqueous solution. The effects of pH (2.0-6.0), 
      contact time (5.0-240.0 min), initial metal ions concentration (25.0-300.0 mg/L), 
      particle size (0.25-2.0 mm) and biosorbent dosage (1.0-6.0 g/L) on the adsorption 
      efficiency of the target metals using foxtail millet shell were evaluated in 
      batch experiments. The models of isotherms and kinetics were used to assess the 
      removal behaviors of Cu, Zn, Cd and Cr ions from aqueous solution by foxtail 
      millet shell. The results showed that the best fitting equilibrium isotherm 
      models for Cu, Zn, Cd and Cr ions were Freundlich (Cu and Zn) and Langmuir (Cd 
      and Cr), respectively under the proper adsorption conditions. The maximum 
      biosorption capacities were 11.89, 10.59, 12.48 and 11.70 mg g(-1) of Cu, Zn, Cd 
      and Cr, respectively by terms of Langmuir model. The kinetics of biosoption the 
      target metal ions processes were best explained by pseudo-second-order kinetic 
      model. Furthermore, pseudo-second-order and intraparticle diffusion models were 
      cooperative mechanism during the whole biosorption. In addition, the pores on the 
      surface of the shell were covered and then became smooth after biosorption 
      through Scanning electron microscope (SEM) revealed, which demonstrated that the 
      target metal ions were adsorbed by foxtail millet shell. The results of Energy 
      dispersive spectrometer (EDS) further gave evidences that Cu, Zn, Cd and Cr ions 
      were adsorbed onto surface of the adsorbent, respectively. Analysis of Fourier 
      transform infrared spectroscopy (FTIR) demonstrated that various functional 
      groups, such as C-H, C˭O, C˭C, C-O, O-S-O and Si-O groups were engaged in the 
      interaction between foxtail millet shell and Cu, Zn, Cd and Cr ions. This paper 
      provided evidences that foxtail millet shell was a potential and efficient 
      biosorbent on removal of Cu, Zn, Cd and Cr ions from aqueous solutions, due to 
      its high biosorption availability, capacity and low cost.
CI  - Copyright (c) 2018 Elsevier Inc. All rights reserved.
FAU - Peng, Sheng-Han
AU  - Peng SH
AD  - Chengdu Medical College, Chengdu 610500, Sichuan, PR China.
FAU - Wang, Rong
AU  - Wang R
AD  - Chengdu Medical College, Chengdu 610500, Sichuan, PR China.
FAU - Yang, Li-Zhi
AU  - Yang LZ
AD  - Chengdu Medical College, Chengdu 610500, Sichuan, PR China.
FAU - He, Li
AU  - He L
AD  - Chengdu Medical College, Chengdu 610500, Sichuan, PR China.
FAU - He, Xu
AU  - He X
AD  - Chengdu Medical College, Chengdu 610500, Sichuan, PR China.
FAU - Liu, Xin
AU  - Liu X
AD  - Chengdu Medical College, Chengdu 610500, Sichuan, PR China. Electronic address: 
      liuxin834@163.com.
LA  - eng
PT  - Journal Article
DEP - 20180904
PL  - Netherlands
TA  - Ecotoxicol Environ Saf
JT  - Ecotoxicology and environmental safety
JID - 7805381
RN  - 0 (Ions)
RN  - 0 (Metals, Heavy)
RN  - 0 (Water Pollutants, Chemical)
RN  - 00BH33GNGH (Cadmium)
RN  - 059QF0KO0R (Water)
RN  - 0R0008Q3JB (Chromium)
RN  - 789U1901C5 (Copper)
RN  - J41CSQ7QDS (Zinc)
SB  - IM
MH  - Adsorption
MH  - Cadmium/analysis
MH  - Chromium/analysis
MH  - Copper/analysis
MH  - Diffusion
MH  - Hydrogen-Ion Concentration
MH  - Ions
MH  - Kinetics
MH  - Metals, Heavy/*analysis
MH  - Setaria Plant/*chemistry
MH  - Water/chemistry
MH  - Water Pollutants, Chemical/*analysis
MH  - Zinc/analysis
OTO - NOTNLM
OT  - Aqueous solutions
OT  - Biosorption
OT  - Foxtail millet (Setaria italica)
OT  - Heavy metals
EDAT- 2018/09/08 06:00
MHDA- 2018/11/28 06:00
CRDT- 2018/09/08 06:00
PHST- 2018/03/27 00:00 [received]
PHST- 2018/08/21 00:00 [revised]
PHST- 2018/08/22 00:00 [accepted]
PHST- 2018/09/08 06:00 [pubmed]
PHST- 2018/11/28 06:00 [medline]
PHST- 2018/09/08 06:00 [entrez]
AID - S0147-6513(18)30822-4 [pii]
AID - 10.1016/j.ecoenv.2018.08.084 [doi]
PST - ppublish
SO  - Ecotoxicol Environ Saf. 2018 Dec 15;165:61-69. doi: 10.1016/j.ecoenv.2018.08.084. 
      Epub 2018 Sep 4.