Comparison of available treatment techniques for hazardous aniline-based organic contaminants

Abstract

The growing contamination of various freshwater resources due to industrial effluent is a serious concern among the scientific community. Several organic compounds are essentially used as chemical intermediate in variety of industrial processes. These organic compounds are hazardous chemicals which are already considered dangerous to global public health and other forms of life due to their high toxicity, carcinogenicity. These organic contaminants are found present in the industrial effluents. Several treatment methods were applied in the literature for their elimination from wastewater to make their final disposal safe for environment. In this article, different kinds of physical, biological and advanced oxidation methods (AOPs) applied for the treatment of various important organic compounds were compared for their advantages and disadvantages. The results showed that the conventional treatment methods are not effective to treat these kinds of toxic and refractory chemical compounds. Therefore, AOPs were found to be the most promising treatment methods.

Quantitative structure–activity relationships for the reaction kinetics of trace organic contaminants with one-electron oxidants

“…These moieties are commonly found in the molecular structures of TrOCs and likely serve as the main reaction sites in oxidation reactions due to their high electron density. 23,47,[59][60][61] Among the three parent moieties, phenols undergo acid-base speciation, resulting in dramatically higher k values for phenolates. 23 In this case, the k values of phenols and phenolates were treated separately, and thus readers can calculate the k values at a specic pH by including pK a values.…”

Effect of Pumping Speeds on the Fate of Aniline in Different Soil Layer

“…At present, aniline has been listed as a priority pollutant by the US Environmental Protection Agency (EPA), and the National Institute for Occupational Safety and Health (NIOSH) has identified it as a potential occupational carcinoid for humans and animals. It is also blacklisted as a priority control pollutant in China, with a maximum allowable concentration of 1 mg•L −1 in wastewater [9][10][11]. However, due to accidental leakage and extreme pesticide use, 30,000 tons of aniline is released every year, making its control urgent [12].…”

Kinetics of photocatalytic degradation of organic compounds: a mini-review and new approach

“…Studies on wastewater treatment have focussed on developing sustainable and suitable technologies for removing organic pollutants since many detected organic compounds interact with biological systems, raising concerns about potential human exposure and ecological health. 1,2 Today, there are various methods for the degradation of organic compounds, such as wet oxidation, 3 biological oxidation, 4 electrochemical redox, 5 advanced oxidation processes (AOPs) 6 or combined process. 7 AOPs, including photocatalysis, are considered high efficiency for degrading organic compounds in water.…”