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All Journal The Journal of Pure and Applied Chemistry Research Jurnal Riset Sains dan Kimia Terapan Prosiding Seminar Nasional Pengabdian Kepada Masyarakat
Hanifah, Sarina
Universitas Negeri Jakarta
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health Other

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Coffee Biomass Encapsulated in Calcium Alginate as Material for Lead (II) Adsorption from Aqueous Solutions Sarina Hanifah; Rusnadi Rusnadi; M. Bachri Amran
The Journal of Pure and Applied Chemistry Research Vol 10, No 1 (2021): Edition January-April 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.01.577

Abstract

This work aims to study the removal of lead (II) from aqueous solutions with Ca-Alginate (CA)  and Coffee-Calcium-Alginate (CCA). The coffee biomass were successfully prepared as the material to be encapsulated in calcium alginate. The characterization of the synthesized CA and CCA was performed using fourier transform infrared and scanning electron microscopy. The method used was batch study. Various factors which affected adsorption efficiency of lead (II) ions by CA and CCA, such as pH, agitation time, and adsorbent dose were investigated for determination of optimum experimental conditions. The result showed that CA and CCA had significant effects on adsorption of lead (ІІ) ions at pH = 4, agitation time of more than 120 min, and the adsorbent dose was 0.05 gram. Moreover, the Langmuir isotherm model showed that maximum adsorption capacity (qm) was 163.66 mg/g and 176.99 mg/g respectively for CA and CCA. The Langmuir isotherm was better described the adsorption equilibrium. Both of the adsorbent fitted to pseudo second order equations. These results demonstrated that CA and CCA show great potential to remove Pb(ІІ) ions from aqueous solutions.
ENKAPSULASI PEWARNA ALAM UNTUK MENINGKATKAN EFFISIENSI WAKTU DAN KUALITAS BATIK DI RUMAH BATIK PALBATU Erdawati Bayazid; Riskia Chandra Widianti; Sarina Hanifah
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol. 5 No. 1 (2024): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2024
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract One of the policies used by Rumah Batik Palbatu is to use natural dyes as batik dyes. Unfortunately, the coloring process needs to be repeated 8-10 times, so it takes a long time and produces a lot of waste water. To speed up the coloring process and reduce the volume of natural dyes, natural dyes are modified to reduce the particle size to nanometer sizes. This activity aims to facilitate partners to be able to make natural dyes in the form of nano with encapsulation techniques through training and mentoring. Service activities are carried out through 2 methods, namely counseling on extracting dyes from natural materials and training on modifying natural dyes using encapsulation techniques. The training began with a demonstration by the PKM UNJ team, then continued with independent practice by the participants while accompanied by the team. From the evaluation results, the batik making group's knowledge about extracting dyes from natural materials was successfully improved. Members of the batik making group have become more skilled in making extracts from various natural materials and modifying the size of natural dye extracts to nanometer size. Increasing the knowledge and skills of batik making group members can be used as a way to develop their business both in the fields of production and sales.  Abstrak Rumah Batik Palbatu merupakan badan usaha yang memproduksi batik dengan konsep kontemporer nasional. Untuk ikut serta mendukung kebijakan pemerintah dalam hal menjaga lingkungan, Rumah Batik Palbatu menggunakan pewarna alam sebagai bahan pewarna batik. Proses pewarnaan dilakukan berulang-ulang yaitu 8-10 kali, sehingga memerlukan waktu yang lama. Proses yang memakan waktu lama tidak sebanding dengan hasil kain batiknya, karena hasil kain batik mudah luntur. Untuk mempersingkat proses pewarnaan dan mencegah kelunturan warna, pewarna alam yang digunakan dimodifikasi dengan teknik enkapsulasi. Teknik enkapsulasi ini dapat meningkatkan luas permukaan serta mempekecil ukuran partikel pewarna alam dalam satuan nanometer sehingga dapat meningkatkan kestabilan warna. Kegiatan PKM ini bertujuan untuk memfasilitasi mitra agar mampu membuat pewarna alam dalam bentuk nano dengan teknik enkapsulasi melalui pelatihan dan pendampingan. Kegiatan pengabdian dilaksanakan melalui 2 metode yaitu penyuluhan tentang ekstraksi pewarna dari bahan alam dan pelatihan modifikasi pewarna alam dengan teknik enkapsulasi. Pelatihan diawali dengan demonstrasi oleh tim PKM UNJ kemudian dilanjutkan dengan praktik secara mandiri oleh peserta sambil didampingi oleh tim. Dari hasil evaluasi, pengetahuan kelompok pembatik tentang ekstraksi pewarna dari bahan alam berhasil ditingkatkan. Anggota kelompok pembatik menjadi lebih terampil dalam membuat ekstrak dari berbagai bahan alam dan memodifikasi ukuran ekstrak pewarna alam menjadi ukuran nanometer. Peningkatan pengetahuan dan keterampilan dari anggota kelompok pembatik dapat digunakan sebagai cara untuk melakukan pengembangan dalam usahanya baik dalam bidang produksi maupun penjualanya. 
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 Erdawati Bayazid M. Bachri Amran Mulyanah, Annisa Riskia Chandra Widianti Rusnadi Rusnadi Syaifullah, Mhd Muslim