Research Article
Synthesis and Characterization of Nano-CaO from Clamshell (Geloine sp.) Using Sol-Gel Method
Anwar Ma’ruf*,
Arief Nur’ari Prananda
Issue:
Volume 12, Issue 1, February 2024
Pages:
1-5
Received:
8 January 2024
Accepted:
19 January 2024
Published:
1 February 2024
Abstract: The synthesis of nano-CaO can be produced from natural resources, chemical compounds, and waste containing calcium such as clamshell (Geloine sp.). The research aims to study the effect of temperature and reaction time (sol formation) on the yield of nano-CaO after the calcination process and to characterize the Ca(OH)2 and nano-CaO obtained. The result shows that clamshell (Geloine sp.) waste can be used as raw material for the synthesis of nano-CaO using the sol-gel method. The main factor in the synthesis of nano-CaO by sol-gel method is sol formation from the calcium precursor with hydrochloric acid to form calcium chloride. The optimum temperature of sol formation is at the temperature of 90 – 100°C for 60 minutes of reaction time with a yield of nano-CaO of 11.34 – 12%. The optimum reaction time of gel formation is the reaction time of 90 minutes at a temperature of 100°C with a yield of nano-CaO of 14.5%. The yield of CaO decreases after the reaction time of 90 minutes. It is can be concluded that the optimum conditions for gel formation are a temperature of 100°C and a reaction time of 90 minutes. The nano-CaO can be used for any purpose, such as an additive to body soap because of its antimicrobial activity.
Abstract: The synthesis of nano-CaO can be produced from natural resources, chemical compounds, and waste containing calcium such as clamshell (Geloine sp.). The research aims to study the effect of temperature and reaction time (sol formation) on the yield of nano-CaO after the calcination process and to characterize the Ca(OH)2 and nano-CaO obtained. The r...
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Research Article
Oxidation of Abattoir Wastewater Using Cobalt-Catalyzed Potassium Persulfate
Ayoola Rebecca Olawumi*,
Adebayo Albert Ojo,
Ahuchaogu Chinedu Dikeagu,
Akinola Joshua Oluwatobi
Issue:
Volume 12, Issue 1, February 2024
Pages:
6-12
Received:
23 November 2023
Accepted:
16 January 2024
Published:
13 March 2024
Abstract: Abattoir wastewater (AWW) contains a high level of organic pollutants due to the presence of toxic contaminants such as blood, feces from animals, and detergents from cleaning activities. In this study, the wastewater from the slaughterhouse was treated with a cobalt-catalyzed persulfate oxidation reaction to determine how well persulfate works as an oxidant to get rid of and break down organic materials. The water tested had a high organic load (COD = 2100mg/L), a pH of 7.7, and a BOD of 800mg/L. Time (10–90min), temperature (25–75°C), acid content (0.5–2.5M), persulfate (0.025–0.1g), and cobalt catalyst (50–150 mg/L) were all evaluated as operational conditions. Temperature and acid content was found to have a positive effect on COD elimination while increasing the residence time. The reaction conditions were optimized at a constant dose of 0.3 g of potassium persulfate, 1 M acid concentration in 30 minutes, and a maximum temperature of 60°C. At optimum conditions, approximately 98.46% of the COD was removed. The COD elimination rate was 92.85% at a low amount of potassium persulfate (0.075g). The study concludes that the developed approach could be used to efficiently treat abattoir wastewater.
Abstract: Abattoir wastewater (AWW) contains a high level of organic pollutants due to the presence of toxic contaminants such as blood, feces from animals, and detergents from cleaning activities. In this study, the wastewater from the slaughterhouse was treated with a cobalt-catalyzed persulfate oxidation reaction to determine how well persulfate works as ...
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