SELECTIVE REMOVAL OF HEAVY METALS FROM COMPLEX INDUSTRIAL EFFLUENTS BY pH-REGULATED HYDROXIDE PRECIPITATION

Authors

  • Muzaffarov Umurbek Umarovich,Aripov Avaz Rozikovich,Khojiev Shokhrukh Toshpulatovich,Mamarakhimov Safarali Kamoliddinovich (Doctoral student of Navoi State University of Mining and Technology), (PhD, Associate Professor of Navoi State University of Mining and Technology), (PhD, Associate Professor of Almalyk State Technical Institute). (senior teacher of Almalyk State Technical Institute),

DOI:

https://doi.org/10.55640/

Keywords:

heavy metals, industrial wastewater, neutralization, hydroxide precipitation, metal removal efficiency, coprecipitation, resource-efficient treatment.

Abstract

Industrial wastewater from chemical and metallurgical processes contains high levels of heavy metals, creating serious environmental challenges. This study evaluates pH-controlled neutralization combined with hydroxide precipitation for treating such wastewater. Samples from various production units were analyzed using ICP-OES and XRF before and after treatment. Neutralization at pH 6.5–8.5 enabled the formation of poorly soluble metal hydroxides. Results showed significant reductions in Cu, Zn, Fe, Ni, Pb, and Cd concentrations. Copper and iron dominated the solid phase, while iron hydroxides enhanced removal via coprecipitation and adsorption. Removal efficiencies above 90% were achieved for the most toxic metals. SEM-EDS analysis confirmed stable Cu–Zn–Fe hydroxide phases in residues. The method reduces environmental risks and concentrates valuable metals into a recoverable solid form, supporting resource-efficient wastewater treatment and sustainable water management.

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Published

2026-01-30

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Vol. 5 No. 01 (2026): Journal of Multidisciplinary Sciences and Innovations

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How to Cite

SELECTIVE REMOVAL OF HEAVY METALS FROM COMPLEX INDUSTRIAL EFFLUENTS BY pH-REGULATED HYDROXIDE PRECIPITATION. (2026). Journal of Multidisciplinary Sciences and Innovations, 5(01), 2709-2715. https://doi.org/10.55640/ (Original work published 2026)

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