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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Journal of Environmental Science and Sustainable Development
Vayolla Syakirah Karil
Program Studi Teknik Lingkungan - Universitas Riau
Humanities Chemistry Education Energy Engineering Environmental Science Social Sciences

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Uji Toksisitas Akut Instalasi Pengolahan Air Limbah (Ipal) Komunal X Kota Pekanbaru Menggunakan Daphnia Magna (Dhapnia sp) Dengan Metode Whole Effluent Toxicity (WET) Vayolla Syakirah Karil; Shinta Elystia; Gunadi Priyambada
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

X Communal Wastewater Treatment Plant (WWTP) in Pekanbaru City is one of the solutions in processing domestic waste water so that it is safe before being discharged into waters. However, the WWTP effluent test results showed the value of COD, TSS, and Ammonia that exceed the quality standard. So there is a need for WET (Whole Effluent Toxicity) testing which is one way to monitor the performance of Wastewater Treatment Plant. This research aims to determine the value of LC50, TUa and analyze the connection between the quality of waste water and the level of toxicity in waste water. Acute toxicity tests were performed by static methods within 96 hours using Daphnia Magna test animals. Mortality of Daphnia magna were analyzed using Probit Method. The value of LC50 is 5,719% and TUa value is 17,486 with category III that means wastewater is on High Acute Toxicity. Measured COD, TSS, Ammonia, and Oil & Fat parameters affect the mortality of test animals, where the value of each of these parameters is directly proportional to the death rate of Daphnia magna. Keywords: Toxicity Test, Communal WWTP, Daphnia magna, WET, LC50.
FACTORS INFLUENCING THE INTENTION TO PARTICIPATE IN DISCARDED FACE MASK MANAGEMENT AMONG URBAN RESIDENTS Karil, Vayolla Syakirah; Nastiti, Anindrya
Journal of Environmental Science and Sustainable Development Vol. 7, No. 1
Publisher : UI Scholars Hub

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Abstract

Massive mask usage during the COVID-19 pandemic has been causing increased mask waste problem. Improper mask management can spread virus in the environment. Proper mask waste management behaviours must be investigated to better understand the underlying factors. Studies have focused on mask waste management in Indonesia, but none have used a comprehensive behavioural framework. This study integrates the Theory of Planned behaviour (TPB) and the Norm Activation Model (NAM) aiming to determine the factors that influence the intentions of Pekanbaru’s residents in managing mask waste. The survey involved 384 respondents selected through a systematic cluster random sampling. The data was analysed with PLS-SEM to verify the model. We hypothesised that awareness of consequences, the ascription of responsibility, subjective and personal norms, attitudes, and perceived behavioural control positively affect behaviour. Attitudes (p < 0.05, t = 2.681), personal norms (p < 0.05, t = 6.708), and perceived behavioral control (p < 0.05, t = 5.846) are also positively and significantly related to mask waste management intention. Awareness of consequences has a significant indirect effect on mask waste management intention through attitude (p < 0.05, t = 2.638), and the highest indirect effects are through ascription of responsibility and personal norms (p < 0.05, t = 4.885). The consequence of awareness, ascription of responsibility, and personal norms are essential elements in enhancing motivations for taking responsibility and participating in household waste management. Demographics such as age and monthly expenses significantly affect mask waste management intentions. This work offers a novel integration of TPB and NAM, which enhances research on the behavioural intents of household mask waste management. Based on the results, the policy implications of how to motivate society to sort waste were discussed, and research limitations were indicated.
PEMANFAATAN TONGKOL JAGUNG TERAKTIVASI SEBAGAI ADSORBEN LOGAM BESI (Fe) DALAM AIR SUMUR BOR: PENGARUH pH, WAKTU KONTAK, DAN DOSIS ADSORBEN Vayolla Syakirah Karil; Lita Darmayanti; Elvi Yenie; Lidya Astuti
Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Vol 9, No 1 (2026)
Publisher : Universitas Islam Kalimantan MAB Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/dl.v9i1.22935

Abstract

Air sumur bor di Desa Belading, Kecamatan Sabak Auh, Kabupaten Siak, mengandung kadar besi (Fe) melebihi ambang batas menurut Permenkes RI No. 32 Tahun 2017. Penelitian ini mengevaluasi efektivitas tongkol jagung teraktivasi sebagai bioadsorben untuk menurunkan kadar Fe, serta menentukan kondisi optimum dan model kinetika serta isoterm yang sesuai. Variabel yang diuji meliputi pH larutan (2, 3, 4, 5, 6, dan 7), waktu kontak (5, 10, 15, 30, 60, 90, 120 dan 150 menit), dan dosis adsorben (0,8; 1,2; 1,6; 2; 2,4; 2,8 dan 3,2 g/L). Adsorben disiapkan melalui karbonisasi dan aktivasi dengan menggunakan HCl. Kondisi optimum diperoleh pada pH 5, waktu kontak 60 menit, dan dosis 2,4 g/L, dengan efisiensi penyisihan Fe sebesar 91,57% dan kapasitas adsorpsi 1,58 mg/g. Proses adsorpsi mengikuti model kinetika Pseudo Second Order (R² = 0,9995) dan isoterm Freundlich (R² = 0,8497). Tongkol jagung teraktivasi efektif sebagai solusi lokal dan ramah lingkungan untuk pengolahan air tanah tercemar Fe.
PEMANFAATAN TONGKOL JAGUNG TERAKTIVASI SEBAGAI ADSORBEN LOGAM BESI (Fe) DALAM AIR SUMUR BOR: PENGARUH pH, WAKTU KONTAK, DAN DOSIS ADSORBEN Vayolla Syakirah Karil; Lita Darmayanti; Elvi Yenie; Lidya Astuti
Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Vol 9 No 1 (2026)
Publisher : Universitas Islam Kalimantan MAB Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/dl.v9i1.22935

Abstract

Air sumur bor di Desa Belading, Kecamatan Sabak Auh, Kabupaten Siak, mengandung kadar besi (Fe) melebihi ambang batas menurut Permenkes RI No. 32 Tahun 2017. Penelitian ini mengevaluasi efektivitas tongkol jagung teraktivasi sebagai bioadsorben untuk menurunkan kadar Fe, serta menentukan kondisi optimum dan model kinetika serta isoterm yang sesuai. Variabel yang diuji meliputi pH larutan (2, 3, 4, 5, 6, dan 7), waktu kontak (5, 10, 15, 30, 60, 90, 120 dan 150 menit), dan dosis adsorben (0,8; 1,2; 1,6; 2; 2,4; 2,8 dan 3,2 g/L). Adsorben disiapkan melalui karbonisasi dan aktivasi dengan menggunakan HCl. Kondisi optimum diperoleh pada pH 5, waktu kontak 60 menit, dan dosis 2,4 g/L, dengan efisiensi penyisihan Fe sebesar 91,57% dan kapasitas adsorpsi 1,58 mg/g. Proses adsorpsi mengikuti model kinetika Pseudo Second Order (R² = 0,9995) dan isoterm Freundlich (R² = 0,8497). Tongkol jagung teraktivasi efektif sebagai solusi lokal dan ramah lingkungan untuk pengolahan air tanah tercemar Fe.
Co-Authors Anindrya Nastiti Elvi Yenie Lidya Astuti Lita Darmayanti Priyambada, Gunadi Shinta Elystia