Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization

T. P. Phetla, F. Ntuli, E. Muzenda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Due to the fast depletion of water reserves globally, the toxicity of heavy metals and the negative impact posed to the environment; the current focus in wastewater treatment is now on the removal and re-use of these heavy metals rather than removal and disposal in landfills. This study investigated the use of hydrazine as a reducing agent to remove and recover Ni, Cu and Fe from wastewater by reduction crystallization. Feasibility studies were carried out to test the efficiency and find the optimum operating conditions for this method and generate an understanding of the chemical and particulate process occurring. The experiments were conducted on a 20L batch reactor using synthetic solutions containing a mixture of nickel, copper and iron. The results show that hydrazine can recover and crystallize Ni, Cu and Fe into their elemental form: 99.30% Ni was removed from the Ni-solution, 99.26% Ni and 98.81% Cu were removed from the Ni-Cu solution, over 99.90% Ni and 97.70% Fe were removed from the Ni-Fe solution. Evolution of the PSD revealed that breakage and molecular growth were the predominant particulate processes occurring, a finding which was validated by the scanning electron micrographs of the powder obtained.

Original languageEnglish
Title of host publicationWater Resources Management VI
PublisherWITPress
Pages681-690
Number of pages10
Volume145
ISBN (Print)9781845645144
DOIs
Publication statusPublished - Jan 1 2011
Event6th International Conference on Sustainable Water Resources Management, WRM 2011 - Riverside, CA, United States
Duration: May 23 2011May 25 2011

Other

Other6th International Conference on Sustainable Water Resources Management, WRM 2011
CountryUnited States
CityRiverside, CA
Period5/23/115/25/11

Fingerprint

crystallization
heavy metal
effluent
feasibility study
breakage
landfill
nickel
copper
toxicity
wastewater
iron
electron
removal
experiment
water

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

Cite this

Phetla, T. P., Ntuli, F., & Muzenda, E. (2011). Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization. In Water Resources Management VI (Vol. 145, pp. 681-690). WITPress. https://doi.org/10.2495/WRM110611
Phetla, T. P. ; Ntuli, F. ; Muzenda, E. / Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization. Water Resources Management VI. Vol. 145 WITPress, 2011. pp. 681-690
@inproceedings{f133a79a08434dce9aa413d3097575e8,
title = "Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization",
abstract = "Due to the fast depletion of water reserves globally, the toxicity of heavy metals and the negative impact posed to the environment; the current focus in wastewater treatment is now on the removal and re-use of these heavy metals rather than removal and disposal in landfills. This study investigated the use of hydrazine as a reducing agent to remove and recover Ni, Cu and Fe from wastewater by reduction crystallization. Feasibility studies were carried out to test the efficiency and find the optimum operating conditions for this method and generate an understanding of the chemical and particulate process occurring. The experiments were conducted on a 20L batch reactor using synthetic solutions containing a mixture of nickel, copper and iron. The results show that hydrazine can recover and crystallize Ni, Cu and Fe into their elemental form: 99.30{\%} Ni was removed from the Ni-solution, 99.26{\%} Ni and 98.81{\%} Cu were removed from the Ni-Cu solution, over 99.90{\%} Ni and 97.70{\%} Fe were removed from the Ni-Fe solution. Evolution of the PSD revealed that breakage and molecular growth were the predominant particulate processes occurring, a finding which was validated by the scanning electron micrographs of the powder obtained.",
author = "Phetla, {T. P.} and F. Ntuli and E. Muzenda",
year = "2011",
month = "1",
day = "1",
doi = "10.2495/WRM110611",
language = "English",
isbn = "9781845645144",
volume = "145",
pages = "681--690",
booktitle = "Water Resources Management VI",
publisher = "WITPress",

}

Phetla, TP, Ntuli, F & Muzenda, E 2011, Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization. in Water Resources Management VI. vol. 145, WITPress, pp. 681-690, 6th International Conference on Sustainable Water Resources Management, WRM 2011, Riverside, CA, United States, 5/23/11. https://doi.org/10.2495/WRM110611

Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization. / Phetla, T. P.; Ntuli, F.; Muzenda, E.

Water Resources Management VI. Vol. 145 WITPress, 2011. p. 681-690.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization

AU - Phetla, T. P.

AU - Ntuli, F.

AU - Muzenda, E.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - Due to the fast depletion of water reserves globally, the toxicity of heavy metals and the negative impact posed to the environment; the current focus in wastewater treatment is now on the removal and re-use of these heavy metals rather than removal and disposal in landfills. This study investigated the use of hydrazine as a reducing agent to remove and recover Ni, Cu and Fe from wastewater by reduction crystallization. Feasibility studies were carried out to test the efficiency and find the optimum operating conditions for this method and generate an understanding of the chemical and particulate process occurring. The experiments were conducted on a 20L batch reactor using synthetic solutions containing a mixture of nickel, copper and iron. The results show that hydrazine can recover and crystallize Ni, Cu and Fe into their elemental form: 99.30% Ni was removed from the Ni-solution, 99.26% Ni and 98.81% Cu were removed from the Ni-Cu solution, over 99.90% Ni and 97.70% Fe were removed from the Ni-Fe solution. Evolution of the PSD revealed that breakage and molecular growth were the predominant particulate processes occurring, a finding which was validated by the scanning electron micrographs of the powder obtained.

AB - Due to the fast depletion of water reserves globally, the toxicity of heavy metals and the negative impact posed to the environment; the current focus in wastewater treatment is now on the removal and re-use of these heavy metals rather than removal and disposal in landfills. This study investigated the use of hydrazine as a reducing agent to remove and recover Ni, Cu and Fe from wastewater by reduction crystallization. Feasibility studies were carried out to test the efficiency and find the optimum operating conditions for this method and generate an understanding of the chemical and particulate process occurring. The experiments were conducted on a 20L batch reactor using synthetic solutions containing a mixture of nickel, copper and iron. The results show that hydrazine can recover and crystallize Ni, Cu and Fe into their elemental form: 99.30% Ni was removed from the Ni-solution, 99.26% Ni and 98.81% Cu were removed from the Ni-Cu solution, over 99.90% Ni and 97.70% Fe were removed from the Ni-Fe solution. Evolution of the PSD revealed that breakage and molecular growth were the predominant particulate processes occurring, a finding which was validated by the scanning electron micrographs of the powder obtained.

UR - http://www.scopus.com/inward/record.url?scp=84865541743&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865541743&partnerID=8YFLogxK

U2 - 10.2495/WRM110611

DO - 10.2495/WRM110611

M3 - Conference contribution

AN - SCOPUS:84865541743

SN - 9781845645144

VL - 145

SP - 681

EP - 690

BT - Water Resources Management VI

PB - WITPress

ER -

Phetla TP, Ntuli F, Muzenda E. Removal and recovery of Ni, Cu and Fe from heavy metal effluent by reduction crystallization. In Water Resources Management VI. Vol. 145. WITPress. 2011. p. 681-690 https://doi.org/10.2495/WRM110611