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You searched for: Journal name Journal of chemical technology and biotechnology Remove constraint Journal name: Journal of chemical technology and biotechnology Publication year rev 7992-2008 Remove constraint Publication year rev: 7992-2008 Source 2008 v.83 no.10 Remove constraint Source: 2008 v.83 no.10
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1. Degradation of biorefractory furaltadone in aqueous solution by ozonation

Author:
Bao, Nan; Sun, Jian; Wei, Zhen-Tao; Ma, Dong; Liu, Feng; Wang, Jin
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1347-1352
ISSN:
0268-2575
Subject:
ammonia; aqueous solutions; biological treatment; carbon dioxide; formaldehyde; furaltadone; hydroxyl radicals; molecular weight; oxalic acid; oxidation; ozonation; ozone; pH; spectral analysis; wastewater; wastewater treatment; water
Abstract:
... BACKGROUND: Furaltadone (FD), a nitrofuran derivative, is a highly effective chemotherapeutic drug. In China the FD wastewater discharged by the pharmaceutical industry is high in organics and biorefractory compounds. The objective of this study was to investigate the degradation mechanism of FD in aqueous solution by ozone oxidation. Preliminary results on the reaction mechanism were obtained usi ...
DOI:
10.1002/jctb.1957

2. Depolymerization of poly(ethylene terephthalate) in dilute aqueous ammonia solution under hydrothermal conditions

Author:
Zenda, Kentaro; Funazukuri, Toshitaka
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1381-1386
ISSN:
0268-2575
Subject:
ammonia; carbon; depolymerization; ethylene glycol; glycolysis; hydrolysis; methanolysis; reaction kinetics; solubilization; temperature
Abstract:
... BACKGROUND: Various methods, such as glycolysis, methanolysis, and hydrolysis with supercritical water, have been investigated for chemical recycling of poly(ethylene terephthalate) (PET), which is used in large quantities for beverage containers. However, a more effective process is needed.RESULTS: PET was depolymerized in aqueous ammonia in a batch reactor and a semi-batch reactor over a tempera ...
DOI:
10.1002/jctb.1951

3. Effect of dye auxiliaries on the kinetics of advanced oxidation UV/H₂O₂ of Acid Orange 7 (AO7)

Author:
Anglada, Ángela; Rivero, María J.; Ortíz, Inmaculada; Urtiaga, Ane
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1339-1346
ISSN:
0268-2575
Subject:
chemical concentration; decolorization; dyeing; dyes; effluents; oxidation; sodium carbonate; sodium chloride
Abstract:
... BACKGROUND: The effect of four dye-auxiliary chemicals, typically employed in acid dyeing, on the performance of UV/H₂O₂ decolouration of the model non-biodegradable dye C.I. Acid Orange 7 (AO7) was investigated. The initial concentration of AO7 was 0.150 g L⁻¹, while the concentration of the auxiliary compounds (NaCl, Na₂SO₄, Na₂CO₃ and CH₃COOH) was varied in the range 1-10 g L⁻¹.RESULTS: The neg ...
DOI:
10.1002/jctb.1981

4. Efficient metal-free aerobic oxidation of aromatic hydrocarbons utilizing aryl-tetrahalogenated N-hydroxyphthalimides and 1,4-diamino-2,3-dichloroanthraquinone

Author:
Zhang, Qiaohong; Chen, Chen; Ma, Hong; Miao, Hong; Zhang, Wei; Sun, Zhiqiang; Xu, Jie
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1364-1369
ISSN:
0268-2575
Subject:
aromatic hydrocarbons; catalytic activity; oxidation; oxygen
Abstract:
... BACKGROUND: Hydrocarbon oxidation reactions are central to numerous processes that convert bulk chemicals into useful and higher-value products. In this investigation, an efficient metal-free catalytic system for aerobic oxidation of aromatic hydrocarbons was successfully established by synthesizing a series of aryl-tetrahalogenated N-hydroxyphthalimides and applying these compounds with 1,4-diami ...
DOI:
10.1002/jctb.1977

5. One-step production of 2,3-butanediol from starch by secretory over-expression of amylase in Klebsiella pneumoniae

Author:
Zheng, Yu; Zhang, Haiyi; Zhao, Li; Wei, Liujing; Ma, Xingyuan; Wei, Dongzhi
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1409-1412
ISSN:
0268-2575
Subject:
Klebsiella pneumoniae; alpha-amylase; biological production; gene overexpression; genes; plasmids; starch
Abstract:
... BACKGROUND: 2,3-Butanediol (2,3-BD) is a valuable chemical that can be biosynthesized from many kinds of substrates. For commercial biological production of 2,3-BD, it is desirable to use cheap substrate without pretreatment, such as starch. However, there have been few reports on the production of 2,3-BD directly from starch.RESULTS: In this work, gene malS coding for α-amylase (EC 3.2.1.1) precu ...
DOI:
10.1002/jctb.1958

6. Oxidation of 4-nitrophenol in water over Fe(III), Co(II), and Ni(II) impregnated MCM41 catalysts

Author:
Chaliha, Suranjana; Bhattacharyya, Krishna Gopal; Paul, Parimal
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1353-1363
ISSN:
0268-2575
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acrylic acid; atomic absorption spectrometry; catalysts; cation exchange capacity; cations; cobalt; hydrogen peroxide; hydroquinone; iron; malonic acid; nickel; nitroaromatic compounds; oxalic acid; oxidants; oxidation; p-nitrophenol; scanning electron microscopy; steel; temperature
Abstract:
... BACKGROUND: Nitrophenols are toxic constituents of the effluents of petroleum, textile, dye, iron and steel, foundries, pharmaceutical and electrical manufacturing industries. Aromatic nitro compounds are particularly resistant to normal chemical or biological oxidation making them environmentally persistent. Advanced oxidation using appropriate catalysts mineralize these organics to harmless fina ...
DOI:
10.1002/jctb.1934

7. Selection and optimisation of macroporous resin for separation of stilbene glycoside from Polygonum multiflorum Thunb

Author:
Lv, Lishuang; Tang, Jian; Ho, Chi-Tang
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1422-1427
ISSN:
0268-2575
Subject:
correlation; bioactive properties; Reynoutria multiflora; resins; crystals; models; plant extracts; pH; solvents; sorption isotherms; glycosides; ethanol; desorption; adsorption
Abstract:
... BACKGROUND: 2,3,5,4'-Tetrahydroxystilbene-2-O-β-glucopyranoside (SG; a stilbene glycoside) is a major bioactive component of Polygonum multiflorum Thunb. (PM), a popular traditional Chinese herb. In this study a method was developed for the separation of SG from PM on macroporous resins. These were selected and optimised using the linear correlation coefficients of the Langmuir and Freundlich isot ...
DOI:
10.1002/jctb.1964

8. Solvent extraction of gold(I) from alkaline cyanide solution by dibutylcarbitol (DBC) with n-octanol

Author:
Lu, Pan
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1428-1432
ISSN:
0268-2575
Subject:
cyanides; gold; kerosene; pH; sodium sulfite; solvents
Abstract:
... BACKGROUND: Currently, cyanidisation is preferred for the extraction of gold because it has a number of advantages over other methods. Gold(I) can be extracted with various extractants, but there are no reports on the extraction of gold(I) from cyanide solution by dibutylcarbitol (DBC). In this work the extraction of gold(I) from alkaline cyanide solution using DBC with n-octanol was studied. Seve ...
DOI:
10.1002/jctb.1966

9. An integrated biodesulfurization process, including inoculum preparation, desulfurization and sulfate removal in a single step, for removing sulfur from oils

Author:
Tangaromsuk, Jantana; Borole, Abhijeet P.; Kruatrachue, Maleeya; Pokethitiyook, Prayad
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1375-1380
ISSN:
0268-2575
Subject:
Rhodococcus erythropolis; absorbance; acetates; biocatalysts; bioprocessing; enzymes; fermentation; microbial growth; oils; sulfur
Abstract:
... BACKGROUND: A single-stage reactor, in which the growth of bacterial culture, induction of desulfurizing enzymes, and desulfurization reaction are carried out in a single step, was adopted to investigate desulfurization of dibenzothiophene (DBT) at high cell densities. Rhodococcus erythropolis, IGTS8 was used as the biocatalyst. Optimal conditions for bacterial growth and DBT desulfurization were ...
DOI:
10.1002/jctb.1949

10. A new efficient method for one-pot conversions of aryl carboxylic acids into nitriles without solvent

Author:
Cao, Yu-Qing; Zhang, Zhan; Guo, Yan-Xin
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1441-1444
ISSN:
0268-2575
Subject:
chemical reactions; ethyl carbamate; nitriles; pollution; solvents
Abstract:
... A new efficient method for synthesising nitriles, important organic reagents, is reported in this paper. In an environmentally benign solvent-free system, aryl carboxylic acids were converted into the corresponding nitriles via one-pot reactions, by amidation with ethyl carbamate followed by dehydration with thionyl chloride, in excellent yields. The results showed that the method has the advantag ...
DOI:
10.1002/jctb.1961

11. An overview of the application of Fenton oxidation to industrial wastewaters treatment

Author:
Bautista, P.; Mohedano, A.F.; Casas, J.A.; Zazo, J.A.; Rodriguez, J.J.
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1323-1338
ISSN:
0268-2575
Subject:
biological treatment; carbon; chemical oxygen demand; cork; oxidation; paper pulp; pulp and paper mill effluents; wastewater; wastewater treatment
Abstract:
... This review provides updated information on the application of the Fenton process as an advanced oxidation method for the treatment of industrial wastewaters. This technology has been used in recent decades as a chemical oxidation process addressed to meet a variety of objectives including final polishing, reduction of high percentages of organic load in terms of chemical oxygen demand or total or ...
DOI:
10.1002/jctb.1988

12. Fermentative production of L(+)-lactic acid from starch hydrolyzate and corn steep liquor as inexpensive nutrients by batch culture of Enterococcus faecalis RKY1

Author:
Wee, Young-Jung; Reddy, L.V.A.; Ryu, Hwa-Won
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1387-1393
ISSN:
0268-2575
Subject:
Enterococcus faecalis; cell growth; corn; corn starch; corn steep liquor; fermentation; glucose; hydrolysates; lactic acid; nitrogen; nutrients; potato starch; potatoes; raw materials; starch; tapioca; wheat starch; yeast extract
Abstract:
... BACKGROUND: Attempts were made to determine the lactic acid production efficiency of novel isolate, Enterococcus faecalis RKY1 using four different starches (corn, tapioca, potato, and wheat starch) with different concentrations (50, 75, 100, and 125 g L⁻¹) and corn steep liquor as an inexpensive nitrogen source.RESULTS: The yield of lactic acid from each starch was higher than 95% based on initia ...
DOI:
10.1002/jctb.1953

13. Kinetics of syntrophic acetogenesis in a saline medium

Author:
Huiliñir, César; Roa, Erick; Vargas, Daniela; Roeckel, Marlene; Aspé, Estrella
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1433-1440
ISSN:
0268-2575
Subject:
acetates; acetic acid; equations; pH; sodium chloride; volatile fatty acids
Abstract:
... BACKGROUND: The anaerobic degradation kinetics of volatile fatty acids (VFA) in a saline (24 g NaCl dm⁻³) and mesophilic (37 °C) medium was studied under batch test conditions. The acetate production kinetics without inhibition by propionic, butyric and valeric acids was determined. The inhibition of acetate production during syntrophic acetogenesis by VFA and pH was studied. The acetogenesis with ...
DOI:
10.1002/jctb.1967

14. Performance evaluation of a water/silicone oil two-phase partitioning bioreactor using Rhodococcus erythropolis T902.1 to remove volatile organic compounds from gaseous effluents

Author:
Aldric, Jean-Marc; Thonart, Philippe
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1401-1408
ISSN:
0268-2575
Subject:
Rhodococcus erythropolis; acclimation; biodegradation; biomass; bioreactors; effluents; ethanol; inoculum; oils; oxygen; silicone; viability; volatile organic compounds
Abstract:
... BACKGROUND: In the framework of biological processes used for waste gas treatment, the impact of the inoculum size on the start-up performance needs to be better evaluated. Moreover, only a few studies have investigated the behaviour of elimination capacity and biomass viability in a two-phase partitioning bioreactor (TPPB) used for waste gas treatment. Lastly, the impact of ethanol as a co-substr ...
DOI:
10.1002/jctb.1956

15. Sewage sludge treatment using microwave-enhanced advanced oxidation processes with and without ferrous sulfate addition

Author:
Lo, Kwang V.; Liao, Ping H.; Yin, Gui Q.
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1370-1374
ISSN:
0268-2575
Subject:
ammonia; chemical oxygen demand; cost effectiveness; ferrous sulfate; nutrients; orthophosphates; oxidation; sewage; sewage sludge; solubilization; temperature
Abstract:
... BACKGROUND: Microwave-enhanced advanced oxidation processes with and without the addition of ferrous sulfate (MW/H₂O₂/Fe²⁺-AOP and MW/H₂O₂-AOP respectively) were studied for reduction of solids and solubilisation of nutrients from secondary sewage sludge.RESULTS: For the MW/H₂O₂/Fe²⁺-AOP the yields of solubilisation of orthophosphate and ammonia decreased with increasing temperature. The best resu ...
DOI:
10.1002/jctb.1965

16. Tyrosinase and peroxidase production by Rhizopus oryzae strain ENHE obtained from pentachlorophenol-contaminated soil

Author:
León-Santiesteban, Hugo; Bernal, Rosa; Fernández, Francisco J.; Tomasini, Araceli
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1394-1400
ISSN:
0268-2575
Subject:
Rhizopus oryzae; culture media; enzyme activity; fungi; lignin peroxidase; monophenol monooxygenase; pentachlorophenol; peroxidase; polluted soils; tyrosine
Abstract:
... BACKGROUND: The aim of this study was to investigate the ability of a zygomycete isolated from pentachlorophenol (PCP)-contaminated soil to produce peroxidase and phenoloxidase enzymes, and to determine the effect of tyrosine and PCP on the enzyme activities. The ability of the isolate to tolerate and remove PCP was also studied.RESULTS: A zygomycete capable of tolerating and removing PCP was isol ...
DOI:
10.1002/jctb.1955

17. A comprehensive study of extraction of hyperoside from Hypericum perforatum L. using CTAB reverse micelles

Author:
Zhou, Xiaohua; Dong, Lichun; Li, Duanhua
Source:
Journal of chemical technology and biotechnology 2008 v.83 no.10 pp. 1413-1421
ISSN:
0268-2575
Subject:
Hypericum perforatum; alcohols; anions; flavonoids; hydrogen bonding; methodology; micelles; pH
Abstract:
... BACKGROUND: Hyperoside is a valuable natural pharmaceutical that has many biomedical functions. By the traditional method of alcohol extraction, only hyperoside solution of very low concentration can be obtained, so a new method is urgently needed to produce pure hyperoside more effectively. Reverse micellar extraction has been widely used in the purification of biological macromolecules. Theoreti ...
DOI:
10.1002/jctb.1963