Advanced oxidation/reduction processes (AO/RPs) for wastewater treatment, current challenges, and future perspectives: a review

Khan, Qaiser; Sayed, Murtaza; Khan, Javed Ali; Rehman, Faiza; Noreen, Saima; Sohni, Saima; Gul, Ikhtiar

doi:10.1007/s11356-023-31181-5

Cited by 9 publications

(1 citation statement)

References 83 publications

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“…Oxidation-reduction (redox) processes involve the transfer of electrons between chemical species, leading to the conversion of pollutants into less harmful or more easily removable particles. Examples of redox processes include the use of chlorine or ozone for disinfection, as well as advanced oxidation processes like UV/hydrogen peroxide or ozone/hydrogen peroxide for the degradation of organic pollutants [57]. While chemical processes offer effective solutions for pollutant removal, careful consideration must be given to factors such as chemical dosage, reaction kinetics, and the generation of potentially harmful by-products to ensure the sustainability and environmental safety of wastewater-treatment operations.…”

Section: Chemical Processesmentioning

confidence: 99%

Indirect Freeze Crystallization—An Emerging Technology for Valuable Resource Recovery from Wastewater

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Maree,

Mahlangu

2024

Minerals

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This paper explores the efficiency and potential of indirect freeze crystallization (IFC) as a valuable resource-recovery technology in wastewater treatment, particularly focusing on acid mine water and hazardous material wastewater-treatment plants. Wastewater treatment poses challenges to recovering valuable resources effectively, enforcing the need for sustainable and resource-efficient technologies like freeze crystallization. Through a thorough examination of IFC principles and mechanisms, this paper aims to highlight its applications, advantages, and limitations. The investigation includes a comprehensive literature review and detailed methodology from one of the IFC pilot plants, as well as a critical analysis of the environmental and economic implications of IFC. By addressing scaling challenges in reverse osmosis and proposing an environmentally friendly brine disposal method through IFC, this paper contributes to reducing the environmental footprint associated with wastewater treatment. Additionally, this paper highlights the importance of extracting valuable resources from highly saline water and emphasises the potential economic and environmental benefits of resource recovery, particularly focusing on the promising technology of IFC.

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Section: Chemical Processesmentioning

confidence: 99%