PMID- 27191550
OWN - NLM
STAT- MEDLINE
DCOM- 20160802
LR  - 20181202
IS  - 0273-1223 (Print)
IS  - 0273-1223 (Linking)
VI  - 73
IP  - 10
DP  - 2016
TI  - Removal of nickel(II) from aqueous solution by Vigna unguiculata (cowpea) pods 
      biomass.
PG  - 2301-10
LID - 10.2166/wst.2016.012 [doi]
AB  - The potential to remove nickel(II) ions from aqueous solution using a biosorbent 
      prepared from Vigna unguiculata pods (VUPs) was investigated in batch 
      experiments. The batch mode experiments were conducted utilising the independent 
      variables of pH (2 to 8), contact time (5 to 120 min), dosage concentration (0.2 
      to 1.6 g), nickel(II) concentrations (10 to 80 mg L(-1)) and temperature (20 to 
      50 degrees C). The biosorption data fitted best to the Freundlich biosorption model with 
      a correlation coefficient (R(2)) of 0.993 and lowest chi-squared value of 31.89. 
      The maximum sorption capacity of the VUP for nickel(II) was 27.70 mg g(-1). 
      Kinetics studies revealed that the biosorption process followed the 
      pseudo-second-order model as it had the lowest sum of square error value (0.808) 
      and correlation coefficient close to unity (R(2) = 0.998). The calculated 
      thermodynamic parameters showed that the biosorption process was feasible, 
      spontaneous and endothermic. Consequently, the study demonstrated that VUP 
      biomass could be used as a biosorbent for the removal of nickel(II) from aqueous 
      solution.
FAU - Guyo, Upenyu
AU  - Guyo U
AD  - Department of Chemical Technology, Midlands State University, Private Bag 9055, 
      Senga, Gweru, Zimbabwe E-mail: guyou@msu.ac.zw.
FAU - Sibanda, Kudakwashe
AU  - Sibanda K
AD  - Department of Chemical Technology, Midlands State University, Private Bag 9055, 
      Senga, Gweru, Zimbabwe E-mail: guyou@msu.ac.zw.
FAU - Sebata, Edith
AU  - Sebata E
AD  - Department of Chemical Technology, Midlands State University, Private Bag 9055, 
      Senga, Gweru, Zimbabwe E-mail: guyou@msu.ac.zw.
FAU - Chigondo, Fidelis
AU  - Chigondo F
AD  - Department of Chemical Technology, Midlands State University, Private Bag 9055, 
      Senga, Gweru, Zimbabwe E-mail: guyou@msu.ac.zw.
FAU - Moyo, Mambo
AU  - Moyo M
AD  - Department of Chemical Technology, Midlands State University, Private Bag 9055, 
      Senga, Gweru, Zimbabwe E-mail: guyou@msu.ac.zw.
LA  - eng
PT  - Journal Article
PL  - England
TA  - Water Sci Technol
JT  - Water science and technology : a journal of the International Association on 
      Water Pollution Research
JID - 9879497
RN  - 0 (Ions)
RN  - 0 (Water Pollutants, Chemical)
RN  - 7OV03QG267 (Nickel)
SB  - IM
MH  - Adsorption
MH  - *Biomass
MH  - Fabaceae/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Ions
MH  - Kinetics
MH  - Models, Theoretical
MH  - Nickel/*chemistry
MH  - Temperature
MH  - Waste Disposal, Fluid/methods
MH  - Water Pollutants, Chemical/*chemistry
MH  - Water Purification/methods
EDAT- 2016/05/19 06:00
MHDA- 2016/08/03 06:00
CRDT- 2016/05/19 06:00
PHST- 2016/05/19 06:00 [entrez]
PHST- 2016/05/19 06:00 [pubmed]
PHST- 2016/08/03 06:00 [medline]
AID - 10.2166/wst.2016.012 [doi]
PST - ppublish
SO  - Water Sci Technol. 2016;73(10):2301-10. doi: 10.2166/wst.2016.012.