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All Journal Jurnal Riset Sains dan Kimia Terapan
Hanifah, Sarina
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Chemistry

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Air Quality Analysis in the Vicinity of Tanjung Lesung Beach, Banten Widianti, Riskia Chandra; Syaifullah, Mhd Muslim; Hanifah, Sarina; Mulyanah, Annisa
Jurnal Riset Sains dan Kimia Terapan Vol. 11 No. 1 (2025): Jurnal Riset Sains dan Kimia Terapan, Volume 11 Nomor 1, Juni 2025
Publisher : Program Studi Kimia Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JRSKT.111.02

Abstract

Beaches are among the most popular recreational destinations for the public. This study aims to evaluate the air quality in the Tanjung Lesung coastal area, Pandeglang, Banten, by collecting air samples followed by laboratory analysis. The air pollutants measured in this study include Total Suspended Particulate (TSP), Sulfur Oxides (SOx), and volatile organic compounds such as Benzene, Toluene, and Xylene (BTX). Sampling methods employed were the impinger method for SOx, High Volume Air Sampler(HVAS) for TSP and Pb, and activated carbon and XAD adsorbents for BTX. The results showed that the concentration of TSP reached 421.08 µg/m³, exceeding the national ambient air quality standard of 230 µg/m³. The concentration of SOx was recorded at 0.7837 ppm, which remains within the permissible limit. Meanwhile, BTX compounds were not detected in the air samples, likely due to very low concentrations. These findings suggest that although the coastal air is relatively free from volatile organic compounds, a high level of particulate pollution was observed, which is suspected to originate from nearby industrial activities. Regular air quality monitoring is essential to ensure public health and maintain the comfort of tourist environments.
Column Study and Desorption Performance of Coffee Biomass-Calcium-Alginate Beads to Remove Pb²⁺ Ions from Aqueous Solutions Hanifah, Sarina; Rusnadi, Rusnadi; Stiawan, Elva; Widianti, Riskia Chandra
Jurnal Riset Sains dan Kimia Terapan Vol. 11 No. 1 (2025): Jurnal Riset Sains dan Kimia Terapan, Volume 11 Nomor 1, Juni 2025
Publisher : Program Studi Kimia Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JRSKT.111.01

Abstract

Heavy metal pollution, particularly by lead (Pb²⁺), poses a serious environmental threat and can significantly impact human health. This study aims to evaluate the performance of an adsorbent composed of a mixture of coffee waste and calcium alginate (Coffee-Calcium-Alginate/CCA beads) in removing Pb²⁺ ions through column experiments, as well as to assess the desorption efficiency and reusability of the adsorbent. Column studies were conducted at 1 ppm Pb2+ ions initial concentration, a flow rate of 2.2 mL/min, using a column with a length of 10 cm and a diameter of 7 mm to determine the breakthrough time of the adsorbate, while desorption was performed using HNO₃ to evaluate the efficiency of Pb²⁺ ions release and the potential for adsorbent reuse. The results demonstrated that the CCA adsorbent was able to retain high efficiency over two adsorption–desorption cycles, with desorption efficiencies of 96.35% and 86.64%. The desorption mechanism involves protonation of carboxylate groups and competition between H⁺ and Pb²⁺ ions at the active sites. Overall, CCA beads exhibit promising potential as an effective and reusable adsorbent for treating water contaminated with heavy metals. Future research could explore the effects of varying initial Pb²⁺ ions concentrations and column height to gain a more comprehensive understanding of desorption dynamics within the column system. Keywords: adsorption, coffee biomass, calcium alginate, Pb2+, leads
Co-Authors Elva Stiawan Mulyanah, Annisa Riskia Chandra Widianti Rusnadi Rusnadi Syaifullah, Mhd Muslim