Removal of emerging contaminants from a primary effluent of municipal wastewater by means of sequential biological degradation-solar photocatalytic oxidation processes

<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>

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Solar photocatalytic oxidation and disinfection of municipal wastewater using advanced oxidation processes based on pH, catalyst dose, and oxidant

Journal of Renewable and Sustainable Energy ◽

10.1063/1.4794963 ◽

2013 ◽

Vol 5 (2) ◽

pp. 023124 ◽

Cited By ~ 2

Author(s):

Chandan Singh ◽

Rubina Chaudhary ◽

Kavita Gandhi

Keyword(s):

Photocatalytic Oxidation ◽

Advanced Oxidation Processes ◽

Municipal Wastewater ◽

Advanced Oxidation ◽

Oxidation Processes

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Magnetic iron oxide/clay nanocomposites for adsorption and catalytic oxidation in water treatment applications

Open Chemistry ◽

10.1515/chem-2020-0159 ◽

2020 ◽

Vol 18 (1) ◽

pp. 1148-1166

Author(s):

Ganjar Fadillah ◽

Septian Perwira Yudha ◽

Suresh Sagadevan ◽

Is Fatimah ◽

Oki Muraza

Keyword(s):

Iron Oxide ◽

Water Treatment ◽

Photocatalytic Oxidation ◽

Low Cost ◽

Synthesis Method ◽

Chemical Oxidation ◽

Magnetic Iron Oxide ◽

Oxidation Processes ◽

Recent Developments ◽

Physical And Chemical

AbstractPhysical and chemical methods have been developed for water and wastewater treatments. Adsorption is an attractive method due to its simplicity and low cost, and it has been widely employed in industrial treatment. In advanced schemes, chemical oxidation and photocatalytic oxidation have been recognized as effective methods for wastewater-containing organic compounds. The use of magnetic iron oxide in these methods has received much attention. Magnetic iron oxide nanocomposite adsorbents have been recognized as favorable materials due to their stability, high adsorption capacities, and recoverability, compared to conventional sorbents. Magnetic iron oxide nanocomposites have also been reported to be effective in photocatalytic and chemical oxidation processes. The current review has presented recent developments in techniques using magnetic iron oxide nanocomposites for water treatment applications. The review highlights the synthesis method and compares modifications for adsorbent, photocatalytic oxidation, and chemical oxidation processes. Future prospects for the use of nanocomposites have been presented.

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