ORCID Profile
0000-0002-9220-3416
Current Organisation
Lambung Mangkurat University
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Publisher: IOP Publishing
Date: 12-2020
DOI: 10.1088/1757-899X/980/1/012018
Abstract: This paper aims to study Co (II) desorption from silica gel (SG) and mercapto-silica hybrids (MSH) by many desorbing agents. SG was prepared from sodium silicate from rice husk ash, whereas MSH was SG modified by organic compounds 3-(trimethoxysilyl) - 1-propanthiol. The characterization of adsorbents covered by an X-ray diffractometer and an FTIR spectrophotometer. Optimization of contact time for adsorption of Co (II) on HMS and the procedure of desorption agents (H 2 O, HCl, Na 2 EDTA.2H 2 O) at different contact times and concentrations via batch methods. The results showed that the optimum contact time for Co (II) adsorption on MSH was 120 minutes. The most appropriate desorbing agents for SG and MSH were HCl and Na 2 EDTA.2H 2 O. The optimum contact times for Co (II) desorption on SG and MSH were 90 and 120 minutes, respectively. The optimum concentration of HCl for desorbing Co (II) on SG was 0.025 M. While, the optimum concentration of Na 2 EDTA.2H 2 O for Co (II) desorption on MSH was 0.1 M.
Publisher: Walter de Gruyter GmbH
Date: 28-01-2019
Abstract: Pyrolysis of palm oil is one of the most potential methods to obtain bio-oil. In this study, pyrolysis of palm oil was carried out by using zeolites as a catalyst. The use of HCl and NaOH as activating agents of the zeolites prior to its use in the pyrolysis process was investigated. The result showed that a 1 M concentration of either HCl or NaOH gave an optimum result when the zeolites were used to absorb methylene blue. When 1 M of HCl was used as the activating agent, a more uniform pore size of the zeolites was obtained, along with a more opened pore structure. A GC-MS analysis showed that by using zeolites which was activated using HCl or NaOH, the pyrolysis of palm oil yielded bio-oil with a high content of organic compounds.
Publisher: Center for Journal Management and Publication, Lambung Mangkurat University
Date: 27-02-2020
Publisher: Center for Journal Management and Publication, Lambung Mangkurat University
Date: 15-02-2023
Abstract: Coronavirus varian baru (Severe Acute Respiratory Syndrome Coronavirus 2/SARS-COV2) mulai muncul di dunia dan menyebar di Indonesia pada awal tahun 2020 dan penyakitnya lebih dikenal dengan nama Coronavirus Disease-2019 (COVID-19). Jumlah kasus yang tinggi menyebabkan pemerintah mengambil kebijakan penerapan protokol kesehatan 3M (memakai masker, menjaga jarak dan mencuci tangan). Penggunaan hand sanitizer menjadi alternatif pilihan untuk menjaga higienitas dan kebersihan pribadi. Hand sanitizer komersial yang beredar di pasaran sebagian besar mengandung alkohol karena kem uannya membunuh mikroorganisme patogen. Sementara itu, banyak bahan alami yang memiliki sifat antiseptik dan dapat dimanfaatkan sebagai bahan pembuatan hand sanitizer. Sasaran dalam kegiatan pengabdian ini adalah siswa Sekolah Dasar (SD). Diharapkan dengan adanya pelatihan ini, siswa SD dapat mengembangkan keter ilan entrepreneurship dan membantu dalam mengolah bahan-bahan yang ada disekitar lingkungan menjadi lebih berguna, bahkan bernilai jual. Hal ini membuka peluang untuk memproduksi hand sanitizer alternatif dalam skala kecil atau skala rumah tangga. Maka dari itu diperlukan pelatihan pembuatan hand sanitizer dari bahan alami ini. Dalam pelaksanaannya, program pengabdian pada masyarakat ini dilakukan dengan beberapa tahapan, yaitu tahap persiapan, pelatihan secara daring dan praktek secara luring. Dalam pelatihan tersebut terdapat beberapa hasil positif diantaranya produk hand sanitizer alami yang dilengkapi dengan label kemasan dan label protokol kesehatan pada kotak tools kit serta pemahaman siswa mengenai cara pembuatan hand sanitizer alami.
Publisher: IOP Publishing
Date: 12-2020
DOI: 10.1088/1757-899X/980/1/012075
Abstract: Linear Alkylbenzene Sulfonate (LAS) is an anionic surfactant that is widely used as an active ingredient in synthetic detergent formulation. Being a component in domestic waste, LAS can potentially be harmful to the environment. In this research, the degradation of LAS using TiO 2 -chitosan composite as a photocatalyst was investigated. The optimum dose of TiO 2 -chitosan to be used was determined, and the effect of pH towards the degradation effectiveness was also studied. The results showed that a dose of 1 g/100 mL composite at pH 6 gave an optimum result for the LAS degradation. In this optimum condition, the decrease in LAS concentration was up to 95.20% from its initial concentration.
Publisher: IOP Publishing
Date: 12-2020
DOI: 10.1088/1757-899X/980/1/012077
Abstract: In this research, the potential of chitosan to be used as a coagulant to treat coal wastewater was investigated, in comparison to a conventional coagulant, i.e: Al 2 (SO 4 ) 3 or aluminum sulfate, and Poly Aluminium Chloride (PAC). The parameters being studied were turbidity, pH, TDS, and TSS. The result of this research showed that chitosan worked as a more efficient coagulant to treat coal wastewater compared to alum and PAC, in terms of the needed dose of application. The optimum dose of chitosan was 20 mg/L that gave a 100% decrease in turbidity and TSS. On the other hand, a dose of 120 mg/L of alum was needed to have an optimum result, where the turbidity and TSS were decreased up to 100%. When PAC was used as a coagulant, the optimum dose was 120 ppm that reduced turbidity and TSS to 99.50% and 99.58%, respectively. Coagulation by chitosan, alum, and PAC were all influenced by pH, where the optimum pH for all three coagulants was within a range of neutral pH.
No related grants have been discovered for Utami Irawati.