International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Removal of Heavy Metals from Wastewater using Sustainable Low Cost Absorbents

Author(s) Mr. Asim Ayoub, Ms. Vishakha Vishakha
Country India
Abstract This work examines the adsorption performance of several inexpensive adsorbent materials, namely peanut husk charcoal, fly ash, and natural zeolite, for the removal of Cu²⁺ and Zn²⁺ ions, with the aim of applying these materials to the treatment of metal-finishing wastewater. Batch adsorption experiments were conducted to evaluate the effects of pH, contact time, and initial metal ion concentration. The impact of solution pH on metal uptake by the different adsorbents was investigated over a pH range of 4–11. Optimal removal of copper and zinc occurred at pH 6 for peanut husk charcoal and natural zeolite, while a pH of 8 was optimal for fly ash. Equilibrium adsorption was achieved within 2 hours for Cu(II) and Zn(II) on peanut husk charcoal and fly ash, whereas 3 hours were required for natural zeolite. Adsorption characteristics were analyzed using both Langmuir and Freundlich isotherm models; however, the experimental results showed a better fit with the Langmuir model. Overall, the findings indicate that peanut husk charcoal, fly ash, and natural zeolite are effective for the removal of cationic heavy metals from industrial wastewater, with adsorption efficiency increasing in the order: fly ash < peanut husk charcoal < natural zeolite.
Keywords Adsorption; Low-cost adsorbents; Industrial wastewater
Field Engineering
Published In Volume 8, Issue 1, January-February 2026
Published On 2026-01-22
DOI https://doi.org/10.36948/ijfmr.2026.v08i01.66695
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E-ISSN 2582-2160
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