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All Journal JURNAL KESEHATAN LINGKUNGAN (Journal of Environmental Health)
Northaqifah Hasna Mohamed Khir
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Public Health

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Mitigating Health Risks Through Biosorption: Effective Removal of Nickel (II) and Chromium (VI) from Water with Acid-Treated Potato Peels Northaqifah Hasna Mohamed Khir; Muhamad Salleh, Nur Fatien; Noraini Abdul Ghafar; Nurasmat Mohd Shukri
JURNAL KESEHATAN LINGKUNGAN Vol. 16 No. 4 (2024): JURNAL KESEHATAN LINGKUNGAN
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkl.v16i4.2024.312-320

Abstract

Introduction: Nickel (Ni(II)) and chromium (Cr(VI)) are associated with serious health risks, including respiratory problems, kidney damage, and cancer, along with potential threats to ecosystems. Given their persistence and significant toxicity, effective removal from contaminated water is essential to mitigate these health risks. This study explores the efficacy of acid-treated potato peels (ATPP) as an economical and readily accessible biosorbent for the removal of Ni(II) and Cr(VI) from water solutions. Methods: The study explored two biosorbents: raw potato peels (RPP) and ATPP. Fourier Transform Infrared (FTIR) spectroscopy was utilized to analyze changes in surface functional groups. Batch biosorption experiments were performed using distinct contact times (30-180min), pH (3–11), and biosorbent dosages (0.1–0.5 g). The Mann-Whitney U test was applied for the statistical analysis. Results and Discussion: The FTIR analysis indicated an enhancement in carboxyl groups on the ATPP surface after acid treatment, with stronger transmittance peak at 1645 cm⁻¹. ATPP showed significant improvements in biosorption capacity compared to RPP, removing 18.23% of 10 mg/L Ni(II) at pH 5 in 120minutes using 0.5 g of ATPP. For Cr(VI), 52.28% removal was achieved at pH 7 with 0.2 g of ATPP within the same time frame. Statistical analysis confirmed the superior performance of ATPP in removing Ni(II) (p = 0.024) and Cr(VI) (p = 0.004). Conclusion: ATPP offers significantly higher biosorption capabilities than RPP attributed to the increased presence of carboxyl groups on the modified surface, indicating potential for eco-friendly effective material in mitigating the heavy metal pollution's health risks.
Biopolymer-Based Adsorption of Congo Red Using Modified Κ-Carrageenan: Towards Safer Water and Environmental Health Protection Wan Farahiyah Wan Kamarudin; Asmadi Ali; Sofiah Hamzah; Northaqifah Hasna Mohamed Khir; Abd Rahman Mat Amin
JURNAL KESEHATAN LINGKUNGAN Vol. 17 No. 4 (2025): JURNAL KESEHATAN LINGKUNGAN
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkl.v17i4.2025.321-332

Abstract

Introduction: The discharge of synthetic dyes such as Congo Red (CR) into water systems poses serious threats to aquatic biodiversity, deteriorates water quality, and raises public health risks due to their toxicity, persistence, and tendency to bioaccumulate. This study investigates the potential of chemically modified κ-carrageenan as a biosorbent for CR removal under varying conditions. Methods: Two forms of κ-carrageenan were prepared: unmodified (κC) and modified (mκC). Functional groups were identified using Fourier Transform Infrared Spectroscopy (FTIR), while surface morphology was examined via Scanning Electron Microscopy (SEM). Batch adsorption experiments were conducted to assess how dye concentration, contact time, and adsorbent amount affect Congo Red removal, measured by UV-Vis spectrophotometry and analyzed using Langmuir and Temkin isotherm models. Results and Discussion: The mκC achieved 93.3% removal efficiency at an initial CR concentration of 20 mg/L, reaching equilibrium within 60 minutes at an optimal dosage of 0.3 g. FTIR confirmed the presence of functional groups such as carbonyl, sulfonate, and amide. SEM revealed an increase in the biosorbent's roughness and porosity. Isotherm modelling showed a strong fit to the Langmuir model, with an R² value of 0.9974 and a maximum adsorption capacity of 476.19 mg/g. The Temkin model also revealed a good correlation (R²=0.9511), indicating that chemisorption is the primary mechanism of adsorption. Conclusion: Modified κ-carrageenan is a cost-effective and biodegradable biosorbent for dye removal, with potential for wastewater treatment. Future research on regeneration and real-world applications will enhance its role in improving water quality and protecting environmental health.
Co-Authors Abd Rahman Mat Amin Asmadi Ali Muhamad Salleh, Nur Fatien Noraini Abdul Ghafar Nurasmat Mohd Shukri Sofiah Hamzah Wan Farahiyah Wan Kamarudin