Biodegradation of aldicarb in a packed-bed reactor by immobilized Methylosinus

Date

1999-04-01

Author

Kok, FN
Arica, MY
Halicigil, C
Alaeddinoglu, G
Hasırcı, Vasıf Nejat

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

125
views

0
downloads

Carboxymethylcellulose microspheres cross-linked via aluminum ions were used as a support material for immobilization of Methylosinus isolated from soil contaminated with aldicarb. The degradation capacity of immobilized bacteria, different parameters such as substrate concentration (50-800 ppm), flow rate (10-60 ml h(-1)), and continuous contact with reaction medium (flow rate, 20 mi h(-1) and concentration, 100 ppm) that affect aldicarb degradation were investigated in a packed-bed reactor. Increases in the flow rate decreased the conversion of aldicarb into its metabolites. On the other hand, increasing the substrate concentration up to 400 ppm led to an increase in the amount of aldicarb converted (max 16%). Beyond this, the proportion of aldicarb that converted was decreased, reaching approximately 7% at 800 ppm. The apparent kinetic parameters, K-m' and V-max, were determined to be as 310.11 ppm and 2.29 X 10(-2) ppm s(-1), respectively. Operation of the bioreactor in the recycled mode was much more efficient, degrading 50% of the aldicarb in 24 h and 100% in four days. (C) 1999 Elsevier Science Inc.

Subject Keywords

Degradation, Bioreactor, Carboxymethylcellulose, Cell immobilization, Pesticide, Aldicarb

URI

https://hdl.handle.net/11511/32037

Journal

ENZYME AND MICROBIAL TECHNOLOGY

DOI

https://doi.org/10.1016/s0141-0229(98)00124-0

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Effect of boron containing materials on flammability and thermal degradation of polyamide-6 composites containing melamine cyanurate Yılmaz, Ayşen; Bayramli, Erdal (2011-05-01) Three different boron containing materials, zinc borate (ZnB), borophosphate (BPO(4)), and boron and silicon containing oligomer (BSi), were used to improve the flame retardancy of melamine cyanurate (MC) in a polyamide-6 (PA-6) matrix. The combustion and thermal degradation characteristics were investigated using limiting oxygen index (LOI), UL-94 standard, thermogravimetric analysis-Fourier transform infrared spectroscopy (TGA-FTIR), differential scanning calorimeter (DSC), and scanning electron microscop...
Removal of endocrine disrupter compounds and trace organics in membrane bioreactors Komesli, Okan Tarik; Gökçay, Celal Ferdi; Department of Environmental Engineering (2012) Endocrine disrupters and trace organic contaminants are recently recognized contaminants in wastewaters. Current concept is the multibarier approach where the contaminants are removed from the water cycle both by water and wastewater treatment facilities, as well as natural die-away. In this thesis work LC/MS/MS determination of selected EDC compounds, namely, diltiazem, progesterone, estrone, carbamazepine, benzyl butyl phthalate and acetaminophen, at ultra trace levels, have been carried out by optimizing...
Synthesis and separation properties of B-ZSM-5 zeolite membranes on monolith supports Kalıpçılar, Halil; Noble, RD; Falconer, JL (2002-12-01) Alumina-coated, silicon carbide monoliths were used as supports for B-ZSM-5 zeolite membranes, which were synthesized by in situ hydrothermal crystallization. Both 2 turn x 2 mm (66 channels) and 4 mm x 4 mm (22 channels) monoliths with effective membrane area/volume ratios of 10.6 and 7.2 cm(2)/cm(3), respectively, were used. The membranes separated C-4 and C-6 hydrocarbon isomer vapor mixtures with high selectivities. The selectivities and permeances were comparable to tubular ZSM-5 membranes for butane i...
Syntheses and optoelectronic applications of thiadiazolo quinoxaline bearing alternating conjugated copolymers Ataoğlu, Emre; Çırpan, Ali; Ünalan, Hüsnü Emrah; Department of Polymer Science and Technology (2016) Donor-acceptor type conjugated polymers containing thiadiazolo quinoxaline and benzodithiophene derivatives were used as photoactive material for organic solar cell. The alkoxy- substituted benzo[1,2-b;4,5-b’]dithiophene (BDT) monomer, 2,6bis(trimethyltin)-4,8-di(2-ethylhexyloxyl)benzo[1,2-b;4,5-b’]dithiophene, was polymerized with 4,9-dibromo-[1,2,5]thiadiazolo[3,4-g]quinoxaline through a Pd(0)catalyzed Stille coupling reaction. In order to improve the interchain interactions between polymer chains, an alk...
Synthesis of Photocatalytic Titanium Dioxide Nanopowders Using Different Acid Catalysers Mohammed, Ahmed Hafedh Mohammed; Park, Jongee; Öztürk, Abdullah (2018-07-17) Photocatalytic titanium dioxide (TiO2) nanoparticles were synthesized via acid assisted sol-gel process. The effects of different acids namely; acetic acid, hydrochloric acid, and nitric acid on the formation of TiO2 nanoparticles and their photocatalytic properties were investigated. XRD, SEM, and UV-Vis spectrophotometer analyses were performed to examine the physical and chemical characteristics of the nano powders. The results showed that only anatase phase of TiO2nanoparticleswith different crystallite...

Citation Formats

F. Kok, M. Arica, C. Halicigil, G. Alaeddinoglu, and V. N. Hasırcı, “Biodegradation of aldicarb in a packed-bed reactor by immobilized Methylosinus,” ENZYME AND MICROBIAL TECHNOLOGY, pp. 291–296, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32037.