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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) CHEMICA Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal JISI UMJ (Jurnal Integrasi Sistem Industri UMJ) Journal of Engineering and Technological Sciences JURNAL NASIONAL TEKNIK ELEKTRO R.E.M (Rekyasa Energi Manufaktur) Jurnal Indonesian Journal of Chemistry Sains Natural: Journal of Biology and Chemistry REACTOR : Journal of Research On Chemistry And Engineering Journal of Applied Agricultural Science and Technology Journal of Industrial Community Empowerment JURNAL REKAYASA KIMIA & LINGKUNGAN
Reni Desmiarti
Bung Hatta University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Pembuatan Cairan Pembersih Lantai dengan Memanfaatkan Minyak Atsiri dan Hidrosolnya Desfitri, Erda Rahmilaila; Desmiarti, Reni; Verdana, Sandy Yuda; Amanda, Amelia
REACTOR: Journal of Research on Chemistry and Engineering Vol. 3 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v3i1.56

Abstract

Floor cleaning products on the market usually use synthetic active that can interfere with health and the environment. Therefore, highly recommended to substitute synthetic active with natural active substances such as essential oils. The by-product of essential oils is hydrosol which is also not safe for the environment. This research aims to analyze hydrosol's effectiveness as an antibacterial and get an optimal formulation of oil essential and hydrosol as antibacterial in floor cleaning products. Kaffir lime leaf oil, lemongrass oil, and its hydrosol have been used as an additive in floor cleaners. pH value, free alkaline level, viscosities, and antibacterial effectiveness have been analyzed for floor cleaning products produced in this research. This research found a pH value of 6-8, viscosities is 1516-1867 cP, and free alkaline level of 0,1519-0,1627 b/b. The most antibacterial effectiveness found in the composition of kaffir lime leaf oil and its hydrosol is 15% and 30%, have bacteria inhibition of 10 mm. pH value, free alkaline, and viscosities have been fulfilled the standard of SNI 1842:2019.
Performance Comparison of Coagulation and Adsorption for Gambier Wastewater Treatment Using Poly Aluminium Chloride (PAC), Calcium Hypochlorite, and Activated Carbon Desfitri, Dr. Eng. Erda Rahmilaila; Bawamenewi, Setiaman; Kurinci, Wahyudiansyah; Zainal, Edwina; Naldi, Nofri; Desmiarti, Reni
Sains Natural: Journal of Biology and Chemistry Vol. 15 No. 4 (2025): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v15i4.914

Abstract

Industrial wastewater from gambier (Uncaria gambir Roxb.) extraction is characterized by high organic loads, intense coloration, and elevated levels of total dissolved solids (TDS), which often exceed regulatory discharge limits. This study evaluated the performance of two chemical coagulants, Poly Aluminium Chloride (PAC) and calcium hypochlorite (Ca(OCl)₂), and one physical adsorbent, coal-based activated carbon (CW 130 AR), in treating gambier wastewater. The experimental work assessed their effects on chemical oxygen demand (COD), TDS, and color, alongside adsorption equilibrium modeling using Langmuir and Freundlich isotherms. Results demonstrated that PAC achieved 89% COD removal, and calcium hypochlorite reached 82%. However, both coagulants were ineffective at reducing Total Dissolved Solids (TDS) and occasionally increased dissolved solids due to residual ionic species. In contrast, activated carbon achieved COD and color removal efficiencies exceeding 95%, though it provided only modest TDS removal (≈85%). Adsorption isotherm analysis confirmed that COD removal by activated carbon followed the Langmuir model (R² = 0.9488), indicating monolayer chemisorption on a homogeneous surface. Meanwhile, PAC and calcium hypochlorite showed weak conformity to Langmuir and Freundlich models, confirming coagulation/flocculation as their dominant removal mechanism. This study provides the first comparative performance evaluation of coagulation and adsorption processes for gambier industry wastewater, demonstrating that a hybrid or sequential treatment strategy can achieve more comprehensive pollutant removal. By enhancing treatment efficiency, reducing industrial effluent discharge, and enabling potential water reuse, this work supports Sustainable Development Goals (SDGs) 6 (Clean Water and Sanitation) and 12 (Responsible Consumption and Production).
Optimasi Penghilangan COD dan Warna dengan Proses Koagulasi, Flokulasi dan Sedimentasi untuk Pengolahan Air Limbah Industri Kertas Sutopo, Ulung Muhammad; Fariza, Elfia; Sartika, Lastri; Desmiarti, Reni
REACTOR: Journal of Research on Chemistry and Engineering Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v6i2.9

Abstract

Pulp and paper industry wastewater contains very potential pollutants, especially suspended solids, BOD, and COD which are stable colloids and difficult to separate. To reduce the COD content in paper industry wastewater, the addition of coagulant chemicals is needed. The coagulant used is 20% poly aluminum chloride (PAC) with a variation of 100-600 mg/L and polymer with a dose of 1-6 mg/L to reduce COD and color in wastewater treatment. The settling time used is 1-25 minutes. The effect of adding PAC coagulant is able to reduce COD and color of wastewater at the optimal point, but when the addition of PAC is excessive, the COD and color of the wastewater increase again. The results found that the optimum conditions occurred at a PAC dosage of 400 mg/L and a polymer dosage of 4 mg/L with a settling time of 20 minutes, resulting in a reduction of TSS, COD, and color to 12 mg/L, 102 mg/L, and 123 PtCo, respectively. The combination of coagulation-flocculation-sedimentation processes under these optimum conditions proved effective as a tertiary treatment to meet wastewater quality standards for the paper industry
Co-Authors . Darwison Agtata, Shazvelia Dwi Amanda, Amelia Amelia Amanda Amelia Amir Anggreini, Sri Ansyah, Zulfebri Ariadi Hazmi Arifanda, Aditya Yoga Ayu Bidiawati JR Bawamenewi, Setiaman Desfitri, Dr. Eng. Erda Rahmilaila Desfitri, Erda Rahmilaila Edwardo Edwardo Edwina Zainal Eka Putra Waldi Elizarni Elizarni, Elizarni Ellyta Sari Ellyta Sari Erda Desfitri Erda Rahmilaila Desfitri Erti Praputri Fariza, Elfia Firdaus Firdaus Fu-Sheng Li Fu-Sheng Li Fusheng Li Fusheng Li Fusheng Li Fusheng Li Gui, Hongjie Hapsauqi, Iqbal Hongjie Gui Inva Salsabil Kurinci, Wahyudiansyah Lestari Setiawati Li, Fusheng Li, Fusheng mardian Matlal Fajri Alif Maulana Rosadi Muhammad Imran Hamid Mustikaningtias, Endah Naldi, Nofri Nofri Naldi Nora Idiawati Paysmi, Paysmi Permata, Adinda Ratu Primas Emeraldi Putra, Ikhsan Syafano Raihan, Mohammad Ramadhani, Umi Ramayani, Devi Rambe, Rodo Padena Rizaldi, Fajri Akbar Rosadi, Maulana Yusup Sandy Yuda Verdana Sartika, Lastri Suherman, Hendra Susanti, Riju Sutopo, Ulung Muhammad Syukri Arief Tanjung, Diva Amanda Toshiro Yamada Verdana, Sandy Yuda Wahyuni, Alfia Wei, Yongfen Yamada, Toshiro Yesmizarti Muchtiar Yongfen Wei Yulastri . Yulianti, Amro Zulhadjri Zulhadjri