Review on polycyclic aromatic hydrocarbons (PAHs) migration from wastewater. 2021

Gajendra Kumar Gaurav, and Tariq Mehmood, and Manoj Kumar, and Liu Cheng, and Kuppusamy Sathishkumar, and Amit Kumar, and Deepak Yadav
Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes and College of Civil, Hohai University, Nanjing 210098, PR China.

Rapidly increasing global population and increased civilization has increased burden on potable water resources and results in larger volumes of wastewater. Physical wastewater management techniques has advanced for domestic usage and commercial effluent new conceptions about imminent wastewater treatment have been acclaimed for highly carcinogenic polycyclic aromatic hydrocarbon (PAH) compounds. The present review study emphasis on the assessment of several accessible PAHs treatment methods used in wastewater management. The elementary principles, contextual remediation mechanisms and recent development in PAHs removal practices have also been precisely explained. The comprehensive information regarding sources, dispersal, classification, physicochemical properties, PAHs toxicity for humans and aquatics life, conventional treatment procedures, and advanced oxidation processes specified can assist us to identify the PAHs problem and their intensity. The performance evaluation of different removal techniques are discussed in details and found that highest PAHs' reduction for 5-or 6-ring (99%,) while 3-ring (79% reduction) with oxidant dose of 1.64 mL/L using titanium catalyst. In case of MWTPs, with secondary techniques, the average removal efficiency found in the range of 81.1-92.9% while for AOPs are 32-99.3%. Here, overall yield through AOPs most suitable if process used with some catalyst enhanced the yield as well and suitable for high ring as well as low ring PAHs. Among various processes, advanced oxidation and catalytic oxidation processes are the most valuable and promising techniques for PAHs removal. Based on the given evidences, the AOPs coupled with catalysts have been decided as the most competent design for wastewater PAHs treatment.

UI MeSH Term Description Entries
D011084 Polycyclic Aromatic Hydrocarbons Aromatic hydrocarbons that contain extended fused-ring structures. Polycyclic Aromatic Hydrocarbon,Polycyclic Hydrocarbons, Aromatic,Polynuclear Aromatic Hydrocarbon,Polynuclear Aromatic Hydrocarbons,Aromatic Hydrocarbon, Polycyclic,Aromatic Hydrocarbon, Polynuclear,Aromatic Hydrocarbons, Polycyclic,Aromatic Hydrocarbons, Polynuclear,Aromatic Polycyclic Hydrocarbons,Hydrocarbon, Polycyclic Aromatic,Hydrocarbon, Polynuclear Aromatic,Hydrocarbons, Aromatic Polycyclic,Hydrocarbons, Polycyclic Aromatic,Hydrocarbons, Polynuclear Aromatic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014874 Water Pollutants, Chemical Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water. Chemical Water Pollutants,Landfill Leachate,Leachate, Landfill,Pollutants, Chemical Water
D062065 Wastewater Contaminated water generated as a waste product of human activity. Waste Water,Waste Waters,Wastewaters,Water, Waste,Waters, Waste
D018508 Water Purification Any of several processes in which undesirable impurities in water are removed or neutralized; for example, chlorination, filtration, primary treatment, ion exchange, and distillation. It includes treatment of WASTEWATER to provide potable and hygienic water in a controlled or closed environment as well as provision of public drinking water supplies. Waste Water Purification,Waste Water Treatment,Wastewater Purification,Wastewater Treatment,Water Treatment,Purification, Waste Water,Purification, Wastewater,Purification, Water,Treatment, Waste Water,Treatment, Wastewater,Treatment, Water,Waste Water Purifications,Waste Water Treatments,Water Purification, Waste

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