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All Journal World Chemical Engineering Journal JURNAL INTEGRASI PROSES Jurnal Ilmiah Wahana Pendidikan JURNAL REKAYASA KIMIA & LINGKUNGAN
Heri Heriyanto
Universitas Sultan Ageng Tirtayasa
Religion Chemical Engineering, Chemistry & Bioengineering Education Energy Engineering Social Sciences Other

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Pengolahan Air Limbah Laundry Menggunakan Adsorbsi Cangkang Telur Ayam Novita Sari Fasihah; Yeyen Maryani; Heri Heriyanto
Jurnal Ilmiah Wahana Pendidikan Vol 8 No 20 (2022): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.215 KB) | DOI: 10.5281/zenodo.7239004

Abstract

The increase in the number of washing industries each year parallels the increase in waste production. Without previous treatment, the created laundry waste will be disposed of straight into the environment, causing environmental damage. Laundry waste is characterized by high concentrations of BOD, COD, and LAS, which contribute to environmental damage. This study's objective is to treat laundry waste by adsorption using shell waste. Observed variables included powder size (50, 100, 150, and 200 mesh) and contact time (30, 60, 90 and 120 minutes). The filtrate was tested to determine the concentrations of BOD, COD, and LAS. The obtained results indicate that the optimal adsorbent size is 150 mesh, which can lower BOD levels by 80%, LAS levels by 38.85%, and COD levels by 67.34 %. The optimal period for decreasing COD and BOD levels is 90 minutes, which can reduce BOD levels by 80 percent and COD levels by 74.5 percent, and 120 minutes, which can cut LAS levels by 35.67 percent. The appropriate LAS adsorption isotherm is the Freundlich isotherm with R2 of 0.95023. The use of eggshell waste as an adsorbent demonstrates the significance of environmentally friendly waste treatment technology to laundry waste treatment.
PENGARUH PENAMBAHAN RICE BRAN WAX PADA COATING FILM BERBASIS KITOSAN JAMUR TIRAM TERHADAP PENYUSUTAN BERAT DAN pH BUAH TOMAT Nufus Kanani; Muhammad Triyogo Adiwibowo; Indar Kustiningsih; Heri Heriyanto; Rusdi Rusdi; Harly Demustila; Wardalia Wardalia; Endarto Yudo Wardhono; Widya Ernayati Kosimaningrum; Meri Yulvianti; Muhammad Gofar; Ila Maghfirotul Fahira
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.25753

Abstract

Tomat (Solanum lycopersium L) merupakan buah yang memiliki kandungan air yang tinggi, sehingga mudah mengalami kerusakan dan mengurangi masa simpan tomat. Coating film pada tomat dapat berfungsi untuk melindungi tomat dari kerusakan fisik dan kimia. Kitosan jamur tiram sebagai bahan dasar pembentukan coating film memiliki kelebihan yaitu bersifat kuat dan fleksibel, namun kitosan memiliki kelemahan, yaitu bersifat hidrofilik sehingga perlu penambahan bahan lain untuk memperbaiki karakteristiknya, yaitu dengan penambahan rice bran wax. Penelitian ini dilakukan melalui tahapan pelarutan kitosan dalam asam asetat, penambahan rice brand wax 20-50% (w/v), pembentukan coating film menggunakan metode grafting dengan bantuan gelombang ultrasonik pada temperatur 90°C selama 10-60 menit, dan pengaplikasian coating film pada tomat. Dari penelitian yang dilakukan diperoleh hasil tomat tanpa coating yang dianalisis selama 7 hari menunjukkan tanda pembusukan, sedangkan tomat dengan coating film tetap segar. Penambahan rice brand wax berpengaruh pada penurunan susut bobot tomat. Pada konsentrasi rice bran wax 1-5% menunjukkan bahwa coating film mampu mengurangi penyusutan berat tomat dibandingkan tanpa coating. Penurunan susut bobot tertinggi berturut-turut sebesar 7,88%; 7,71%; 5,8%; 4,57% dan 4,33%. Penambahan rice brand wax juga berpengaruh pada banyaknya gas etilen yang dihasilkan. Kadar gas etilen yang dihasilkan pada hari ke 7 dengan dan tanpa adanya pelapisan berturut-turut sebesar 7,89 dan 1,95 ppm.  
Coconut Shell Activated Carbon as a Sustainable Adsorbent for Gold Recovery from Aqueous Leaching Solutions: A Review Heri Heriyanto; Nufus Kanani; Hendrini Pujiastuti; Rusdi Rusdi
World Chemical Engineering Journal VOLUME 10 NO. 1 JUNE 2026
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i1.40169

Abstract

Gold recovery from dilute hydrometallurgical process liquors has become a strategic priority within circular-economy resource management and responsible precious-metal stewardship. Activated carbon dominates gold capture in industrial circuits, particularly in alkaline cyanide systems where the anionic dicyanoaurate complex, Au(CN)₂⁻, is the principal dissolved species; however, economic constraints and sustainability pressures have stimulated growing interest in biomass-derived alternatives. This review critically synthesizes the evidence base for coconut shell activated carbon as a sustainable, high-performance adsorbent for gold recovery from aqueous leaching media, encompassing feedstock selection, activation pathways, pore architecture, adsorption mechanisms, solution speciation in cyanide and cyanide-free systems, and kinetic and equilibrium modelling. The literature demonstrates that gold removal efficiencies of 87–89% are attainable under optimized cyanide-leachate conditions — alkaline pH, gentle agitation, 1.25 g/L adsorbent dose, and approximately 3 h contact — compatible with real processing environments. Feedstock maturity and activation protocol decisively govern adsorption rate, loading capacity, and mechanical integrity, confirming that material quality must be actively engineered. Equilibrium behaviour conforms to the Freundlich isotherm, reflecting energetically heterogeneous surface sites, while kinetics follow pseudo-first-order dynamics with intraparticle diffusion as a co-limiting resistance. Coconut shell activated carbon holds genuine promise as a low-cost, environmentally responsible adsorbent, contingent on deliberate optimization of pore structure, surface chemistry, elution efficiency, regeneration durability, and real-leachate selectivity.
Improving Carrageenan Extraction Efficiency and Stability Using KOH, NaOH, and Anti-Caking Agents Heri Heriyanto; Annisa Dewi Yasya; AZZAHRA RAHMA PUTRI; Endang Suhendi; Nufus Kanani; Hendrini Pujiastuti
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.42031

Abstract

This study investigates the impact of varying concentrations of potassium hydroxide (KOH) and sodium hydroxide (NaOH), along with anti-caking agents, on the quality of carrageenan extracted from Eucheuma cottonii seaweed. FTIR analysis revealed that KOH-extracted carrageenan retained key functional groups, including sulfate esters and glycosidic bonds, essential for its classification as kappa-carrageenan. KOH also proved more effective than NaOH in reducing moisture content, preserving structural integrity, and meeting the Indonesian National Standards (SNI) for carrageenan quality. The addition of anti-caking agents further optimized product stability, particularly in moisture control. The result shows that KOH was more effective than NaOH in improving carrageenan yield, with a yield of 46% achieved using 12% KOH and 4 g TCP. Anti-caking agents like tricalcium phosphate improved the products moisture control and stability. Future research should focus on refining extraction methods to enhance both product quality and yield.
Co-Authors Annisa Dewi Yasya AZZAHRA RAHMA PUTRI Endang Suhendi, Endang Endarto Yudo Wardhono Harly Demustila Hendrini Pujiastuti Hendrini Pujiastuti Ila Maghfirotul Fahira Kustiningsih, Indar Meri Yulvianti Muhammad Gofar Muhammad Triyogo Adiwibowo Novita Sari Fasihah Nufus Kanani Nufus Kanani Rusdi Rusdi Rusdi Rusdi Wardalia Wardalia Widya Ernayati Kosimaningrum Yeyen Maryani