Recent Advances in Environmental Separations Analysis
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Dear Colleagues,
Nowadays, environmental issues are facing several serious challenges, including all kinds of emissions and pollution threatening the environment and human health. Environmental analysis includes all analytical aspects of studies related to environmental problems and their management. Treatment of soil, water and air pollution, and recovery of metals and resources from soil, water and solid wastes can have a great contribution to the environmental analysis section. Apart from that, the development of new analytical methods or improvement of current techniques for the monitoring of contaminants is of paramount importance for this section. Your valuable unpublished research and review papers can find a worldwide audience among readers of Separations.
Dr. Amin Mojiri
Collection Editor
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Keywords
- method development for analysis of environmental aspects
- validation of methods
- treatment of water, soil, air, and solid wastes
- removal and monitoring of emerging contaminants
- degradation/transformation products
Published Papers (1 paper)
2023
Open AccessArticle
Ultrasonic (US)-Assisted Electrocoagulation (EC) Process for Oil and Grease (O&G) Removal from Restaurant Wastewater
by
Shefaa Omar Abu Nassar, Mohd Suffian Yusoff, Herni Halim, Nurul Hana Mokhtar Kamal, Mohammed J. K. Bashir, Teh Sabariah Binti Abd Manan, Hamidi Abdul Aziz and Amin Mojiri
Cited by 5 | Viewed by 1959
Abstract
Restaurant wastewater contains a high concentration of O&G, up to 3434 mg/L. This study aims to (a) assess the efficiency of EC combined with US methods for O&G removal in restaurant wastewater, (b) identify the optimum condition for COD degradation using EC treatment
[...] Read more.
Restaurant wastewater contains a high concentration of O&G, up to 3434 mg/L. This study aims to (a) assess the efficiency of EC combined with US methods for O&G removal in restaurant wastewater, (b) identify the optimum condition for COD degradation using EC treatment via response surface methodology (RSM), and (c) determine the morphological surface of the aluminium (Al) electrode before and after EC treatment. The wastewater samples were collected from the Lembaran cafeteria at the Universiti Sains Malaysia (USM). The efficiency of EC, US, and US-EC, combined methods for O&G removal, was investigated using a batch reactor (pH 7). The interelectrode distance (ID, 2–6 cm), electrolysis time (T, 15–35 min), and current density (CD, 40–80 A/m
2) were analysed, followed by RSM. The response variables were O&G (1000 mg/L) and chemical oxygen demand (COD low range, 1000 mg/L). The central composite design (CCD) with a quadratic model was used to appraise the effects and interactions of these parameters. The morphological surface of the electrode used was observed via scanning electron microscopy (SEM). The optimum removal efficiencies obtained were 95.4% (O&G) and 75.9% (COD) (ID: 2.4 cm, T: 30.5 min, and CD: 53.2 A/m
2). The regression line fitted the data (R
2 O&G: 0.9838, and R
2 COD: 0.9558). The SEM images revealed that the use of US was useful in minimising cavitation on the electrode surface, which could lower the EC treatment efficacy. The US-EC combined technique is highly recommended for O&G removal from the food industry’s wastewater.
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