Influence of sawdust based biochar on gold tailings wastewater heavy metal contaminants removal

M. M. Manyuchi; N. Sukdeo; W. Stinner; T. N. Mutusva

doi:10.1016/j.sajce.2021.05.003

Influence of sawdust based biochar on gold tailings wastewater heavy metal contaminants removal

M. M. Manyuchi, N. Sukdeo, W. Stinner, T. N. Mutusva

Quality and Operations Management

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

In this study, the influence of saw dust based biochar on the removal of heavy metal ions contaminants in gold tailings wastewater was investigated. The target pollutants were cyanide (CN⁻), chromium (Cr³⁺), iron (Fe³⁺), zinc (Zn²⁺), nickel (Ni²⁺), lead (Pb²⁺), manganese (Mn²⁺) and copper (Cu²⁺). Their composition was determined before and after the adsorption process using biochar. The biochar loading was varied between 10 mg/L, 30 mg/L and 50 mg/L and the retention times between 2 and 12 h in a fixed bed column. The Pearson Coefficient analysis method indicated that the utilization of biochar significantly decreased heavy metal ions contaminants by more than 70% and there was a strong negative relationship between retention time and concentration of remaining metal ions at 95% confidence interval. Negative coefficients for effect of biochar loading and ions concentrations for CN⁻, Cr³⁺, Fe³⁺, Zn²⁺, Ni²⁺, Pb²⁺, Mn²⁺ and Cu²⁺ ions of 0.76, 0.74, 0.75, 0.83, 0.85, 0.87 and 0.87 respectively were observed. The magnitude of each coefficient indicated a significant reduction in the heavy metal ion. Saw dust based biochar can be successfully used to reduce heavy metal contaminants in tailings wastewater. However, more retention time and higher biochar loadings should be adopted to meet for the WHO disposal guidelines of CN⁻, Ni²⁺ and Pb^2+..

Original language	English
Pages (from-to)	81-91
Number of pages	11
Journal	South African Journal of Chemical Engineering
Volume	37
DOIs	https://doi.org/10.1016/j.sajce.2021.05.003
Publication status	Published - Jul 2021

Keywords

Adsorption
Biochar
Box plots
Gold tailings wastewater
Pearson coefficient

ASJC Scopus subject areas

Catalysis
Education
Energy (miscellaneous)
Process Chemistry and Technology
Fluid Flow and Transfer Processes
Filtration and Separation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.sajce.2021.05.003

Cite this

@article{c7b4c545148849949364aff7cbfab643,

title = "Influence of sawdust based biochar on gold tailings wastewater heavy metal contaminants removal",

abstract = "In this study, the influence of saw dust based biochar on the removal of heavy metal ions contaminants in gold tailings wastewater was investigated. The target pollutants were cyanide (CN−), chromium (Cr3+), iron (Fe3+), zinc (Zn2+), nickel (Ni2+), lead (Pb2+), manganese (Mn2+) and copper (Cu2+). Their composition was determined before and after the adsorption process using biochar. The biochar loading was varied between 10 mg/L, 30 mg/L and 50 mg/L and the retention times between 2 and 12 h in a fixed bed column. The Pearson Coefficient analysis method indicated that the utilization of biochar significantly decreased heavy metal ions contaminants by more than 70% and there was a strong negative relationship between retention time and concentration of remaining metal ions at 95% confidence interval. Negative coefficients for effect of biochar loading and ions concentrations for CN−, Cr3+, Fe3+, Zn2+, Ni2+, Pb2+, Mn2+ and Cu2+ ions of 0.76, 0.74, 0.75, 0.83, 0.85, 0.87 and 0.87 respectively were observed. The magnitude of each coefficient indicated a significant reduction in the heavy metal ion. Saw dust based biochar can be successfully used to reduce heavy metal contaminants in tailings wastewater. However, more retention time and higher biochar loadings should be adopted to meet for the WHO disposal guidelines of CN−, Ni2+ and Pb2+..",

keywords = "Adsorption, Biochar, Box plots, Gold tailings wastewater, Pearson coefficient",

author = "Manyuchi, {M. M.} and N. Sukdeo and W. Stinner and Mutusva, {T. N.}",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s)",

year = "2021",

month = jul,

doi = "10.1016/j.sajce.2021.05.003",

language = "English",

volume = "37",

pages = "81--91",

journal = "South African Journal of Chemical Engineering",

issn = "1026-9185",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Influence of sawdust based biochar on gold tailings wastewater heavy metal contaminants removal

AU - Manyuchi, M. M.

AU - Sukdeo, N.

AU - Stinner, W.

AU - Mutusva, T. N.

PY - 2021/7

Y1 - 2021/7

N2 - In this study, the influence of saw dust based biochar on the removal of heavy metal ions contaminants in gold tailings wastewater was investigated. The target pollutants were cyanide (CN−), chromium (Cr3+), iron (Fe3+), zinc (Zn2+), nickel (Ni2+), lead (Pb2+), manganese (Mn2+) and copper (Cu2+). Their composition was determined before and after the adsorption process using biochar. The biochar loading was varied between 10 mg/L, 30 mg/L and 50 mg/L and the retention times between 2 and 12 h in a fixed bed column. The Pearson Coefficient analysis method indicated that the utilization of biochar significantly decreased heavy metal ions contaminants by more than 70% and there was a strong negative relationship between retention time and concentration of remaining metal ions at 95% confidence interval. Negative coefficients for effect of biochar loading and ions concentrations for CN−, Cr3+, Fe3+, Zn2+, Ni2+, Pb2+, Mn2+ and Cu2+ ions of 0.76, 0.74, 0.75, 0.83, 0.85, 0.87 and 0.87 respectively were observed. The magnitude of each coefficient indicated a significant reduction in the heavy metal ion. Saw dust based biochar can be successfully used to reduce heavy metal contaminants in tailings wastewater. However, more retention time and higher biochar loadings should be adopted to meet for the WHO disposal guidelines of CN−, Ni2+ and Pb2+..

AB - In this study, the influence of saw dust based biochar on the removal of heavy metal ions contaminants in gold tailings wastewater was investigated. The target pollutants were cyanide (CN−), chromium (Cr3+), iron (Fe3+), zinc (Zn2+), nickel (Ni2+), lead (Pb2+), manganese (Mn2+) and copper (Cu2+). Their composition was determined before and after the adsorption process using biochar. The biochar loading was varied between 10 mg/L, 30 mg/L and 50 mg/L and the retention times between 2 and 12 h in a fixed bed column. The Pearson Coefficient analysis method indicated that the utilization of biochar significantly decreased heavy metal ions contaminants by more than 70% and there was a strong negative relationship between retention time and concentration of remaining metal ions at 95% confidence interval. Negative coefficients for effect of biochar loading and ions concentrations for CN−, Cr3+, Fe3+, Zn2+, Ni2+, Pb2+, Mn2+ and Cu2+ ions of 0.76, 0.74, 0.75, 0.83, 0.85, 0.87 and 0.87 respectively were observed. The magnitude of each coefficient indicated a significant reduction in the heavy metal ion. Saw dust based biochar can be successfully used to reduce heavy metal contaminants in tailings wastewater. However, more retention time and higher biochar loadings should be adopted to meet for the WHO disposal guidelines of CN−, Ni2+ and Pb2+..

KW - Adsorption

KW - Biochar

KW - Box plots

KW - Gold tailings wastewater

KW - Pearson coefficient

UR - http://www.scopus.com/inward/record.url?scp=85107729488&partnerID=8YFLogxK

U2 - 10.1016/j.sajce.2021.05.003

DO - 10.1016/j.sajce.2021.05.003

M3 - Article

AN - SCOPUS:85107729488

SN - 1026-9185

VL - 37

SP - 81

EP - 91

JO - South African Journal of Chemical Engineering

JF - South African Journal of Chemical Engineering

ER -

Influence of sawdust based biochar on gold tailings wastewater heavy metal contaminants removal

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this