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Kinetic and Equilibrium Studies on the Adsorption of Lead and Cadmium from Aqueous Solution Using Scenedesmus sp

Author

Listed:
  • Rooma Waqar

    (Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan)

  • Muhammad Kaleem

    (Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan)

  • Javed Iqbal

    (Department of Botany, Bacha Khan University, Charsadda 24420, Khyber Pakhtunkhwa, Pakistan)

  • Lubna Anjum Minhas

    (Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan)

  • Muhammad Haris

    (Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan)

  • Wadie Chalgham

    (Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA 90095, USA)

  • Ajaz Ahmad

    (Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia)

  • Abdul Samad Mumtaz

    (Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan)

Abstract

The current study aimed to investigate the viability and characteristics of Scenedesmus sp. as an adsorbent system to remove lead (Pb) and cadmium (Cd) through an in vitro exposure to a metal solution. In batch sorption experiments, the effects of pH, contact time, initial concentration of metal ions, and sorbent dosage on the adsorption process were trialed. The ideal biosorption conditions for each of the two metals were recorded. The biosorption process was quick, and the equilibrium times for the above-mentioned metals were recorded as 90 and 60 min, with removal percentages of 85% and 83%, respectively. The point zero charge of algal biomass was 4.5, which indicates a negative charge on the surface of the biosorbent. The model-based assessment of the biosorption process was revealed to have followed pseudo-second-order kinetics. The adsorption isotherms for lead and cadmium achieved a best fit with the Langmuir model, with monolayer biosorption capacities of 102 and 128 mg g −1 , respectively. The desorption of both metals achieved more than 70% by using HCl. The FT-IR revealed the presence of hydroxyl and amine groups on the surface of the adsorbent that are involved in the biosorption process, and morphological changes were assessed by SEM. Hence, Scenedesmus sp. from a Himalayan provenance showed considerable promise as an alternate sorbent for the treatment of heavy-metal-contaminated wastewater.

Suggested Citation

  • Rooma Waqar & Muhammad Kaleem & Javed Iqbal & Lubna Anjum Minhas & Muhammad Haris & Wadie Chalgham & Ajaz Ahmad & Abdul Samad Mumtaz, 2023. "Kinetic and Equilibrium Studies on the Adsorption of Lead and Cadmium from Aqueous Solution Using Scenedesmus sp," Sustainability, MDPI, vol. 15(7), pages 1-18, March.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:7:p:6024-:d:1112157
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    Citations

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    Cited by:

    1. Arinze Longinus Ezugwu & Hillary Onyeka Abugu & Ifeanyi Adolphus Ucheana & Samson Ifeanyi Eze & Johnbosco C. Egbueri & Victor Sunday Aigbodion & Kovo Godfrey Akpomie, 2023. "Sequestration of Lead Ion in Aqueous Solution onto Chemically Pretreated Pycnanthus angolensis Seed Husk: Implications for Wastewater Treatment," Sustainability, MDPI, vol. 15(21), pages 1-24, October.
    2. Rooma Waqar & Sultana Rahman & Javed Iqbal & Muhammad Kaleem & Lubna Anjum Minhas & Nabi Ullah & Farzana Kausar & Wadie Chalgham & Fahad A. Al-Misned & Hamed A. El-Serehy & Abdul Samad Mumtaz, 2023. "Biosorption Potential of Desmodesmus sp. for the Sequestration of Cadmium and Lead from Contaminated Water," Sustainability, MDPI, vol. 15(15), pages 1-18, July.

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