SELECTIVE EXTRACTION OF FORMIC AND ACETIC ACIDS FROM BIOSYNTHETIC MIXTURE WITH SUCCINIC ACID
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN BIO-INFORMATICS, BIO-TECHNOLOGY AND ENVIRONMENTAL ENGINEERING
Author(s): ALEXANDRA CRISTINA BLAGA , ANCA IRINA GALACTION , DAN CASCAVAL , LENUTA KLOETZER , MADALINA POSTARU
Abstract: This work investigates the possibility of selective separation of succinic, formic, and acetic acids from biosynthetic mixture obtained by fermentation with Actinobacillus succinogenes using reactive extraction with tri-n-octylamine (TOA) dissolved in different solvents (dichloromethane, n-butyl acetate and n-heptane). The extraction process was analyzed by means of the extraction degree and the selectivity factor, defined as the ratio between the cumulated extraction degrees of formic and acetic acids and that of succinic acid. It was concluded that the efficiency of the reactive extraction system is influenced by solute acidity, extractant concentration, and solvent polarity. For underlining the effect of solute acidity in the sequence of acid extraction from biosynthetic mixture, the influence of TOA concentration on extraction efficiency was analyzed for each considered solvent. Because succinic acid possesses two stages of ionization, these studies were carried out for two values
- Publication Date: 02-Jun-2014
- DOI: 10.15224/978-1-63248-009-5-89
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ASSESSMENT OF MICROBIAL COMMUNITY AND SOIL ENZYME ACTIVITY OF COAL MINE DUMPS OF SONBHADRA UTTAR PRADESH, INDIA
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN SOCIAL SCIENCE, ECONOMICS AND MANAGEMENT STUDY
Author(s): ABHAY PRATAP SINGH , KUMUD DUBEY , RADHA RANI MEWARAM , SHIVESH SHARMA , SHOBHIT VERMA
Abstract: Mining activities alter the normal soil properties and negatively affect the ecosystem and environment by many ways. Assessing the damage done to the soil is very important to know the actual status of soil health. Soil health and fertility can be measured by the amount of microorganisms present and activity of different soil enzymes. Number of microorganisms shows amount of stress and unfavorable conditions. In the present study, colony forming units of microorganisms were found relatively higher in natural forest soils in comparison to soil collected from dump sites. Soil enzyme activities are very sensitive to both natural and anthropogenic disturbances and show a quick response to the induced changes so they can express the changes that may have happened in the soil due to mining. Soil phosphatase and dehydrogenase activity in natural forest have been found higher as compared to dump soil. In contrast, higher catalase activity was observed in dump soil and lower in Natural Forest s
- Publication Date: 17-Nov-2014
- DOI: 10.15224/978-1-63248-009-5-90
- Views: 0
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