Papers by bahram nasernejad
The removal of copper (II), zinc (II), and chromium (III) from wastewater by carrot residues (CR)... more The removal of copper (II), zinc (II), and chromium (III) from wastewater by carrot residues (CR) was investigated to evaluate cation exchange capacity. The effects of solution pH and coions were studied in batch experiments. Adsorption equilibria were initially rapidly established, and then decreased markedly after 10 min. Column experiments were carried out in a glass column filled with CR to evaluate the metal removal capacity. The influences of the feed concentration and feed rate were also studied in order to compare the dynamic capacity for metal binding in different feed concentrations.
Journal of Hazardous Materials, 2009
Bagasse is a by-product of sugar milling and important fuel resource for that industry. It is a f... more Bagasse is a by-product of sugar milling and important fuel resource for that industry. It is a fibrous, low density material with a very wide range of particle sizes and high moisture content. The goal of this study is the development of a system based on the use of the ligninolytic enzyme manganese peroxidase (MnP) produced by Phanerochaete chrysosporium for the degradation of polycyclic aromatic hydrocarbons (PAHs), of which anthracene was selected as an example. The white rot fungus P. chrysosporium immobilized on bagasse was grown in both stationary and agitated cultures (rotary shaker, 80rpm) using nitrogen limited growth medium to study the ability of the fungus to degrade anthracene in aqueous media. Production of MnP occurred simultaneously in nitrogen limited culture medium with the added MnSO4 at 40ppm. The MnP activity was at relatively high level (76Ul(-1)) and in this condition, the residual anthracene concentration was 16%.
Journal of Hazardous Materials, 2010
Corrigendum Corrigendum to "Enzymatic degradation of anthracene by the white rot fungus Phaneroch... more Corrigendum Corrigendum to "Enzymatic degradation of anthracene by the white rot fungus Phanerochaete chrysosporium immobilized on sugarcane bagasse" [
Journal of Hazardous Materials, 2007
In this study, copper uptake by sour orange residue (SOR) was investigated. Equilibrium isotherms... more In this study, copper uptake by sour orange residue (SOR) was investigated. Equilibrium isotherms and kinetics were obtained and the effects of solution pH, temperature, and particle size were studied in batch experiments. Equilibrium was well described by Langmuir and Freundlich isotherms and kinetics was found to be best-fit pseudo-second order equations. Maximum uptake was observed at pH 5. With an increase in temperature from 20 to 50 degrees C, copper removal decreased about 20%. Additional chemical treatment of the biosorbent by NaOH, increased the biosorption capacity. It was found that increase in biosorbent particle size had no significant effects on the final equilibrium concentration, but decreased biosorption rate.
Journal of Chemical & Engineering Data, 2007
Secondary structural changes and partitioning process of bovine serum albumin (BSA) in the mixtur... more Secondary structural changes and partitioning process of bovine serum albumin (BSA) in the mixture of (poly-(ethylene glycol 2000) + K 2 HPO 4 + H 2 O) have been studied at 23°C. The effect of varying weight percents of poly(ethylene glycol) and K 2 HPO 4 on the secondary structure of partitioned BSA and the partitioning process of BSA were examined. The equilibrium weight percents of the obtained aqueous two-phase system (ATPS) have been evaluated, and the phase diagrams including the tie lines are presented. It was found that the magnitude of the partition coefficient of BSA and the secondary structures of partitioned BSA depend on the length of obtained tie lines. Occurrences of changes on the secondary structure content of the partitioned BSA were observed by FTIR spectroscopy investigation. The amounts of the secondary structure content of partitioned BSA as R-helix,-sheet,-turn, and unordered structures of BSA were determined and reported.
Process Safety and Environmental Protection, 2011
To investigate the performance of a compost biofilter treating toluene vapor during intermittent ... more To investigate the performance of a compost biofilter treating toluene vapor during intermittent loading, a biofiltration system was set up. This system was inoculated with a special type of white-rot fungus, Phanerochaete chrysosporium. The system was loaded 10h per day on 0.096, 0.024, 0.06m3/h of air flow rates, and 173.1 and 52.6mgm−3 of pollutant concentration while there was no aeration
Biotechnology and Applied Biochemistry, 2014
In this article, various methods including soxhlet, Bligh &am... more In this article, various methods including soxhlet, Bligh & Dyer (B&D), and ultrasonic-assisted B&D were investigated for the extraction of lipid from algal species Chlorella vulgaris. Relative polarity/water content and impolar per polar ratios of solvents were considered to optimize the relative proportions of each triplicate agent by applying the response surface method (RSM). It was found that for soxhlet, hexane-methanol (54-46%, respectively) with total lipid extraction of 14.65% and chloroform-methanol (54-46%, respectively) with the extraction of 19.87% lipid were the best set of triplicate where further addition of acetone to the first group and ethanol to the second group did not contributed to further extraction. In B&D, however, chloroform-methanol-water (50%-35%-15%, respectively) reached the all-time maximum of 24%. Osmotic shock as well as ultrasonication contributed to 3.52% of further extraction, which is considered to promote the total yield up to almost 15%. From the growth data and fatty acid analysis, the applied method was assessed to be appropriate for biodiesel production with regard to selectivity and extraction yield.
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Papers by bahram nasernejad