scholarly journals A HYBRID MADM ANALYSIS IN EVALUATING PROCESS OF CHEMICAL WASTEWATER PURIFICATION REGARDING TO ADVANCE OXIDATION PROCESSES

2017 ◽  
Vol 25 (3) ◽  
pp. 277-288 ◽  
Author(s):  
Mohamad Reza KHODADADI ◽  
Sarfaraz HASHEMKHANI ZOLFANI ◽  
Morteza YAZDANI ◽  
Edmundas Kazimieras ZAVADSKAS
Keyword(s):  
Emerging Contaminants ◽  
Multiple Criteria Decision Making ◽  
Real Data ◽  
Advanced Treatment ◽  
Processing Plant ◽  
Wastewater Purification ◽  
Industrial Processing ◽  
Oxidation Processes ◽  
Photo Catalysis ◽  
Industrial Sources

Organic components, widely spread in water by industrial sources become emerging Contaminants in the water. Due deficient removal in conventional wastewater treatments, advanced treatment should be considered for industrial wastewaters removing. Advance oxidation processes (aops) can be used as an effective subset of chemical treatment for degradation of toxic from water in industrial processing plant. Two Multiple Criteria Decision Making (MCDM) methods based on hybrid SWARA-WASPAS are organized to investigate efficiency of different sort of aops: ozonation, fenton, electrochemical Oxidation, UV/Photo-catalysis, UV/H2O2. Based on MCDM, Fenton is the most possible aops for application in wastewater treatment areas. In this study, SWARA is deployed in evaluating criteria that were identified in literature review, and WASPAS is used for evaluating and ranking the methods. The main point of this study is based on real data.

Advanced treatment for impaired water supplies: when advanced oxidation systems are the best option

2011 ◽  
Vol 6 (4) ◽  
Author(s):  
J. Collins ◽  
C. Cotton ◽  
M. MacPhee
Keyword(s):  
Surface Waters ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Advanced Treatment ◽  
Water Supplies ◽  
Oxidation Processes ◽  
Sustainable Water Supply ◽  
The World ◽  
Quenching Method ◽  
Impaired Water

As drought becomes pervasive around the world, many water suppliers are turning to water supplies once avoided – contaminated surface waters and groundwaters and wastewater. These water supplies are now a valuable part of a sustainable water supply; however, advanced treatment with advanced oxidation processes (AOPs) is typically needed to address trace contaminants in these supplies. This paper will address the following questions: 1) What is the best AOP technology for a given application? 2) Are there oxidation byproducts of concern? 3) What is the best peroxide quenching method? 4) How cost competitive are AOPs?

scholarly journals Contaminants of Emerging Concern Removal by High-Energy Oxidation-Reduction Processes: State of the Art

2019 ◽  
Vol 9 (21) ◽  
pp. 4562 ◽  
Author(s):  
Andrea Capodaglio
Keyword(s):  
Emerging Contaminants ◽  
Advanced Oxidation ◽  
High Energy ◽  
Water Radiolysis ◽  
Primary Role ◽  
Oxidation Processes ◽  
Rapid Decomposition ◽  
Reduction Processes ◽  
Free Process ◽  
Complex Solutions

The presence of ‘emerging contaminants’, i.e., chemicals yet without a regulatory status and poorly understood impact on human health and environment, in wastewater and aquatic environments is widely reported. No established technology, to date, can simultaneously and completely remove all these contaminants, even though some Advanced Oxidation Processes (AOPs,) have demonstrated capacity for some degradation of these compounds. High-energy, radiolytic processing of water matrices using various sources: electron beam (EB), ɣ-rays or non-thermal plasma (NTP) have shown excellent results in many applications, although these remain at the moment isolated examples and scarcely known. High-energy irradiation constitutes an additive-free process that uses short-lived, highly reactive radicals (both oxidating and reducing) generated by water radiolysis, which can instantaneously decompose organic pollutants. Several studies have demonstrated its effectiveness, as a stand-alone process or combined with others, in the rapid decomposition (up to complete mineralization) of organic compounds in pure and complex solutions, and in the removal or inactivation of microorganisms and parasites, without production of leftover residual compounds in solution. High-energy oxidation processes (a.k.a. Advanced Oxidation & Reduction Processes—AORPs) could have a primary role in future strategies addressing emerging contaminants.

scholarly journals Recent Trends in Pharmaceuticals Removal from Water Using Electrochemical Oxidation Processes

Environments ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 85
Author(s):  
Georgios Bampos ◽  
Athanasia Petala ◽  
Zacharias Frontistis
Keyword(s):  
Electrochemical Oxidation ◽  
Emerging Contaminants ◽  
Three Dimensional ◽  
Future Research ◽  
Environmental Matrices ◽  
Oxidation Processes ◽  
Electrosynthesis Of Hydrogen Peroxide ◽  
Physicochemical Methods ◽  
Recent Trends ◽  
Environmental Electrochemistry

Nowadays, the research on the environmental applications of electrochemistry to remove recalcitrant and priority pollutants and, in particular, drugs from the aqueous phase has increased dramatically. This literature review summarizes the applications of electrochemical oxidation in recent years to decompose pharmaceuticals that are often detected in environmental samples such as carbamazapine, sulfamethoxazole, tetracycline, diclofenac, ibuprofen, ceftazidime, ciprofloxacin, etc. Similar to most physicochemical processes, efficiency depends on many operating parameters, while the combination with either biological or other physicochemical methods seems particularly attractive. In addition, various strategies such as using three-dimensional electrodes or the electrosynthesis of hydrogen peroxide have been proposed to overcome the disadvantages of electrochemical oxidation. Finally, some guidelines are proposed for future research into the applications of environmental electrochemistry for the degradation of xenobiotic compounds and micropollutants from environmental matrices. The main goal of the present review paper is to facilitate future researchers to design their experiments concerning the electrochemical oxidation processes for the degradation of micropollutants/emerging contaminants, especially, some specific drugs considering, also, the existing limitations of each process.

scholarly journals Characterization, Classification, Dry High-Intensity Magnetic Separation (DHIMS), and Re-Grinding Techniques to Improve the Mineral Performance of a Sn-Ta-Nb Mineral Concentrate

2021 ◽  
Vol 6 (1) ◽  
pp. 10
Author(s):  
Jennire Nava ◽  
Teresa Llorens ◽  
Juan Menéndez-Aguado
Keyword(s):  
Magnetic Separation ◽  
High Intensity ◽  
Raw Materials ◽  
Processing Plant ◽  
Mining Operations ◽  
Mineralogical Characterization ◽  
Industrial Processing ◽  
Wide Range ◽  
Potential Applications ◽  
Critical Raw Materials

Ta and Nb are considered critical raw materials due to their properties and potential applications in a wide range of sectors. This study deals with Sn-Ta-Nb minerals from the Penouta mine (Orense, Spain), the only active mine in Europe producing tantalum minerals. These minerals are obtained from mining waste accumulated during old mining operations in tailing ponds. The industrial processing flowsheet is based on successive gravimetric stages followed by low intensity magnetic separation to reduce ferromagnetic contaminants. A Sn-Ta-Nb concentrate, with grades between 35–45% Sn and 4–7% Ta2O5 and Nb2O5, is obtained in this stage with plant recoveries around 60–70%, respectively. A chemical-mineralogical characterization by size fractions, XRF and XRD was carried out to implement a size classification stage in the processing plant. The finest fractions, containing higher grades of well-liberated Sn, Ta, and Nb minerals were utilized as the feed for dry high intensity magnetic separation (DHIMS) multifactorial tests, while coarse fractions were regrinded to maximize performance. The favorable results obtained in these tests demonstrate that two products with commercial quality can be obtained: a cassiterite concentrate with grades between 70–78% SnO2 and a tantalite-columbite concentrate with grades ranging between 12 and 14% Ta2O5 and Nb2O5, while also increasing the overall recovery of the plant.

scholarly journals Removal of Emerging Contaminants in Wastewater by Sonolysis, Photocatalysis and Ozonation

2018 ◽  
Vol 21 (2) ◽  
pp. 98-105 ◽  
Keyword(s):  
Rate Constants ◽  
Photocatalytic Oxidation ◽  
Advanced Oxidation Processes ◽  
Emerging Contaminants ◽  
Removal Rate ◽  
Experimental Conditions ◽  
Oxidation Processes ◽  
First Order ◽  
Performance Variation ◽  
Pseudo First Order

<p>Three different advanced oxidation processes (AOPs) were applied to investigate the removal of emerging contaminants (ECs) i.e. sulfamethoxazole (SMX), diclofenac (DCF) and carbamazepine (CBZ) in synthetically prepared solutions. The degradation of these substances was carried out by ozonation, sonolysis and photocatalytic oxidation, as well as by different combinations of these processes. The objectives of this work were to evaluate the removal efficiency in each AOP and to assess the performance variation of sonolysis in combination with other AOPs. The best performances were achieved by sonocatalysis, which resulted in the removal of the selected pharmaceuticals in the range between 37% and 47%. Under similar experimental conditions, the removal of the selected ECs by single compounds by ozonation was slightly lower than the removal of respective compounds in the mixture. Moreover, pseudo first-order removal rate constants of photocatalytic mineralization were determined as 9.33×10-2, 4.90×10-3, 1.06×10-2 min-1 for SMX, DCF and CBZ, respectively.</p>

scholarly journals Brown coals of Far East – natural resource for multipurpose industrial processing

2018 ◽  
Vol 56 ◽  
pp. 03018
Author(s):  
Anatoliy Sorokin ◽  
Andrey Konyushok
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Economic Value ◽  
Far East ◽  
Processing Plant ◽  
Chemical Processing ◽  
Rare Metals ◽  
Standard Facility ◽  
Industrial Processing ◽  
Brown Coals

The analysis of the potential economic value of brown coals of the Far East of Russia is carried out when to use them as a complex chemical mineral resource. It was conducted assessment of industrial attractiveness to use coal combustion or coal chemical processing wastes as an additional source of gold, rare metals and rare earth elements. The Sergeevskoye brown coal deposit of the Zeya-Bureya Sedimentary Basin in the Amur Region was proposed as a potential standard facility for the construction of a coal-chemical processing plant to produce resin, montan wax, complex hydrocarbons with associated gold, rare metals and rare earth elements recovery.

INDUSTRIAL WASTEWATER TREATMENT BY ADVANCED OXIDATION PROCESSES – A REVIEW

2018 ◽  
Vol 1 (2) ◽  
pp. 24-33
Author(s):  
Dr. Waleed M. Sh. Alabdraba ◽  
Alaa R Al-Obaidi ◽  
Saja S Hashim ◽  
Sara D Zangana.
Keyword(s):  
Water Pollution ◽  
Industrial Wastewater ◽  
Advanced Oxidation Processes ◽  
Chemical Oxidation ◽  
National Standards ◽  
Advanced Treatment ◽  
Treatment Technology ◽  
Oxidation Processes ◽  
Effective Water ◽  
Selection Of

The selection of an effective water treatment technology is the important issues that relatively dealing with water pollution problems, some pollutants need more than the conventional facilities to be treated and discharged within the national standards. This study highlights some of the advanced treatment methods related to chemical oxidation, which is used in the treatment of some types of pollutants such as heavy metals, pesticides, dyes, etc. and demonstrate their effectiveness in treatment by reviewing what has been concluded in a number of studies in this range. © 2018 JASET, International Scholars and Researchers Association  

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