Abstract
A new batch mode reactor was constructed to conduct continuous biodegradation of 3,5-dinitrosalicylic acid. Various types of matrices with immobilized Phanerochaete chrysosporium were immersed in a solution containing pollutant and mineral nutrients. Three parameters were chosen to optimize the process. The nitrate and nitrite ions concentrations and HPLC analysis were used to prove the biodegradation of 3,5-dinitrosalicylic acid, and the mixed effects model using one-factor ANOVA was used for statistical calculations. The results showed the correlation between the initial pH, a medium composition, and the process time. In pH = 6.5, the degradation effectiveness was estimated at 99% decrease in the substrate within 14 days, while an 80% decrease of acid concentration was indicated in pH = 3.5 after 28 days of the process duration.
Highlights
Nitroaromatic compounds have been produced and used primarily as explosives materials for many years [1]
The aim of our research is to present a new process of 3,5-dinitrosalicylic acid degradation by Phanerochaete chrysosporium in a batch reactor that works at a micro-industrial scale
The chemical analyses and statistic calculations proved that parameters like t The results obtained in our research proved that Phanerochaete chrysosporium is able of immobilization matrix, the mineral composition of the liquid media, and the ini to degrade 3,5-dinitrosalicylic acid
Summary
Nitroaromatic compounds have been produced and used primarily as explosives materials for many years [1]. 3,5-DNS acid has been used for years as the main reagent in laboratories for the analysis of sugars in reducing reactions [4]. To minimize the contamination effect of nitroarenes on the environment, several methods were proposed They were based on physicochemical and chemical reactions with hydrogen peroxide or ozone, Fenton’s reagent in oxidation or UV radiation, incineration, or sonolysis [5,6,7,8,9]. These processes are often supported by physical treatments like coagulation, adsorption, or filtration [10]. There is a group of microorganisms which developed metabolic pathways for degradation of these pollutants
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