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Use of a natural mineral for the removal of copper and nickel from aqueous solutions to reduce heavy metal content of precipitation sludges
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Date
2007-01-01
Author
Cagın, Volkan
Moralı, Nihan
İmamoğlu, İpek
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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A major disadvantage of precipitation removal of heavy metals is the disposal of sludge having a high concentration of heavy metals, sometimes requiring disposal in hazardous waste landfills. A sorption based polishing step using natural sorbents; following precipitation may be feasible to avoid costly disposal of hazardous sludge. This study investigates the applicability of the use of a natural zeolite, namely clinoptilolite, obtained from a Western Anatolian deposit, in removing copper and nickel from aqueous solutions. Maximum achievable capacities were found as 0.31 meq Cu2+/g and 0.32 meq Ni2+/g for as-received, and 0.55 meq Cu2+/g and 0.43 meq Ni2+/g for conditioned clinoptilolite samples, respectively. Use of clinoptilolite for the removal of Cu2+ from precipitation effluents holds more potential for the purpose of meeting discharge standards. Metal removal mechanisms are also investigated via examination of exchangeable cations (Na+, K+, Mg2+, Ca2+) in the aqueous phase.
Subject Keywords
Ion-Exchange
,
Sorption
,
Kinetics
,
Equilibrium
,
Pb2+
,
Cu2+
,
Zeolite
,
Lead
,
Adsorption
,
Clinoptilolite
URI
https://hdl.handle.net/11511/54016
Journal
JOURNAL OF RESIDUALS SCIENCE & TECHNOLOGY
Collections
Department of Environmental Engineering, Article
Citation Formats
IEEE
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BibTeX
V. Cagın, N. Moralı, and İ. İmamoğlu, “Use of a natural mineral for the removal of copper and nickel from aqueous solutions to reduce heavy metal content of precipitation sludges,”
JOURNAL OF RESIDUALS SCIENCE & TECHNOLOGY
, vol. 4, pp. 45–54, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54016.