Article Per Year (5 Year)
p-Index From 2020 - 2025
0.882
P-Index
This Author published in this journals
All Journal Jurnal SOLMA Jurnal Riset Sains dan Kimia Terapan Prosiding Seminar Nasional Pengabdian Kepada Masyarakat
Riskia Chandra Widianti
Unknown Affiliation
Humanities Chemistry Economics, Econometrics & Finance Education Energy Environmental Science Public Health Other

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
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
Pemanfaatan Ekstrak Kubis Ungu sebagai Media Edukasi Deteksi Hidrokuinon dalam Kegiatan Sosialisasi Kosmetik Aman untuk SISWA SMP Widianti, Riskia Chandra; Pratiwi, Yussi; Syaadah, Rika Siti; Nurhaliza, Arinda Putri; Afianto, Riky; Mulyanah, Annisa
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.20744

Abstract

Background: The increasing use of skin-whitening creams among adolescents has raised concerns since some products still contain hydroquinone, a hazardous chemical that has been banned by the Indonesian Food and Drug Authority (BPOM). The lack of students’ knowledge about the dangers of hydroquinone and their limited skills in detecting its presence highlight the need for practical educational activities. This community service program aimed to enhance junior high school students’ understanding of hydroquinone hazards and to provide simple detection skills using purple cabbage (Brassica oleracea var. capitata L.) extract as a natural indicator. Methods: The activity was carried out in several stages, including preparation, counseling, demonstration of hydroquinone detection with natural indicators, a question-and-answer session, and evaluation using questionnaires. Results: Evaluation showed that the majority of students responded positively, with most answers falling into the agree and strongly agree categories. This indicates an increase in students’ knowledge about the dangers of hydroquinone, their understanding of simple detection methods, and their awareness to be more selective in choosing cosmetic products Conclusions: The socialization and demonstration activities successfully provided educational benefits, trained students’ basic skills, and supported efforts to prevent the use of hazardous cosmetics. This program is also aligned with the Sustainable Development Goals (SDGs) 12 on responsible consumption and production.
Optimasi Produktivitas Cabai melalui Pemanfaatan Limbah Organik Rumah Tangga sebagai Pupuk Cair di Kabupaten Majalengka Pratiwi, Yussi; Khansa, Harfi Amania; Ramadhan Hidayatullah, Rivqi Triputra; Violeta Eugenia, Kay Sarah; Nanda, Elsa Vera; Widianti, Riskia Chandra
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.20868

Abstract

Background: Produksi cabai sebagai sumber mata pencaharian utama masyarakat di Majalengka mencapai 45.414 kwintal. Namun, produktivitas tanaman cabai mengalami penurunan akibat ketergantungan pada pupuk kimia yang mahal dan menurunkan kesuburan tanah. Selain itu, kurangnya pengetahuan dan keterampilan dalam pengelolaan limbah organik rumah tangga membuat peluang pemanfaatannya sebagai pupuk cair belum dimanfaatkan secara optimal. Program pengabdian kepada masyarakat ini bertujuan untuk memberikan sosialisasi terkait pemanfaatan limbah organik rumah tangga menjadi pupuk cair sehingga dapat meningkatkan produktivitas tanaman cabai. Metode: Metode yang digunakan adalah penyuluhan dan demonstrasi di JSIT Majalengka pada bulan Agustus 2025. Hasil: Hasil  dari  kegiatan ini adalah  dapat  meningkatkan kesadaran masyarakat dalam pemanfaatan limbah organik rumah tangga menjadi pupuk untuk mendukung produktivitas tanaman cabai Kesimpulan: Kegiatan pengabdian masyarakat tentang pemanfaatan limbah organik rumah tangga menjadi pupuk cair ini berhasil meningkatkan pengetahuan dan keterampilan masyarakat serta mengatasi kekhawatiran masalah kurangnya pengolahan limbah serta penurunan produktivitas tanaman cabai di Majalengka.
Co-Authors Afianto, Riky Elva Stiawan Erdawati Bayazid Hanifah, Sarina Khansa, Harfi Amania Mulyanah, Annisa Nanda, Elsa Vera Nurhaliza, Arinda Putri Ramadhan Hidayatullah, Rivqi Triputra Rusnadi Rusnadi Syaifullah, Mhd Muslim Violeta Eugenia, Kay Sarah Yussi Pratiwi