نتایج جستجو برای: parachlorophenol

تعداد نتایج: 139  

Journal: :Journal of environmental management 2013
Amjad H El-Sheikh Alan P Newman Adi J Said Abdullah M Alzawahreh Malek M Abu-Helal

The adsorption properties of olive wood (OW) toward phenol, 2-chlorophenol, 3-chlorophenol, 4-chlorophenol, 2-nitrophenol, 4-nitrophenol and 2,4-dinitrophenol, were improved by washing OW with some organic solvents (ethanol, tetrahydrofuran, ether, dichloromethane or hexane). Adsorption isotherms were classified according to Giles and Smith classification, in which L2-shape was obtained after O...

1999
Kazuhito Itoh Miho Fujita Kazuo Kumano Kousuke Suyama Hiroki Yamamoto

Partially-puri®ed extracellular laccase of Coriolus versicolor transformed chlorophenols in the following order: 2,4,6trichlorophenol > 2,6-dichlorophenol > 2,4-dichlorophenol, 2-chlorophenol > 2,3-dichlorophenol. On the other hand, 3and 4chlorophenols, 2,5-, 3,4and 3,5-dichlorophenols, 2,4,5-trichlorophenol and pentachlorophenol were recalcitrant to the laccase. Sinapinic acid, a naturally-occ...

2013
Abdolmajid Gholizadeh Majid Kermani Mitra Gholami Mehdi Farzadkia

The phenolic compounds are known by their carcinogenicity and high toxicity as well as creating unpleasant taste and odor in water resources. The present study develops a cost-effective technology for the treatment of water contaminated with phenolic compounds, including Phenol (Ph), 2-chlorophenol (2-CP), and 4-chlorophenol (4-CP). So, two sorbents, rice bran ash (RBA) and biomass of brown alg...

Journal: :Talanta 2011
Amjad H El-Sheikh Abdullah M Alzawahreh Jamal A Sweileh

Simultaneous preconcentration of phenol, 2-chlorophenol, 3-chlorophenol, 4-chlorophenol, 2-nitrophenol, 4-nitrophenol, and 2,4-dinitrophenol was improved by using olive wood (OW) washed with ethanol then pyrolyzed at 200°C as preconcentrating sorbent. Various OW sorbents were prepared by either washing OW (with ethanol, ether, dichloromethane, tetrahydrofuran or n-hexane); or by pyrolysis (at 1...

2013
Till Dammaschke Nina Jung Inga Harks Edgar Schafer

OBJECTIVE The aim of this study was to evaluate the antimicrobial effect of chlorhexidine gel (CHX-G) 2%, chlorhexidine powder (CHX-P) 1%, povidone-iodine (PVP-I), polyhexanide and camphorated-and-mentholated chlorophenol (ChKM) ex vivo. MATERIALS AND METHODS For every medicament group 10 root segments (15 mm long) of extracted human teeth were prepared to ISO-size 45 and sterilized (n = 50)....

Journal: :Physical chemistry chemical physics : PCCP 2014
Robin Jude Vimal Michael Balaji Sambandam Thangavelu Muthukumar Manickam J Umapathy Periakaruppan T Manoharan

Silver doped zinc oxide nanoparticles are synthesized by a solution combustion method. The samples characterized by a variety of spectroscopic and other techniques clearly reveal the presence of silver nanoparticles as well as silver clusters. The silver in the two forms was identified by careful deconvolution of X-ray photoelectron spectral results. Their formation was also confirmed by the pr...

Journal: :Physical chemistry chemical physics : PCCP 2016
Soumita Mukhopadhyay Debabrata Maiti Sabyasachi Chatterjee Parukuttyamma Sujatha Devi Gopinatha Suresh Kumar

A ternary nanostructured photocatalyst consisting of ZnO/TiO2/Au was designed to achieve an enhanced solar absorption due to the coupling of surface enhanced plasmonic absorption of metal and semiconductor excitons. TiO2 coated ZnO rods with an aspect ratio of 8-12 were decorated with citrate capped gold nanoparticles for photocatalytic degradation of organic pollutants in simulated waste water...

Journal: :Applied and environmental microbiology 2004
Kazuhito Itoh Yoshiko Tashiro Kazuko Uobe Yoichi Kamagata Kousuke Suyama Hiroki Yamamoto

The distribution of tfdAalpha and cadA, genes encoding 2,4-dichlorophenoxyacetate (2,4-D)-degrading proteins which are characteristic of the 2,4-D-degrading Bradyrhizobium sp. isolated from pristine environments, was examined by PCR and Southern hybridization in several Bradyrhizobium strains including type strains of Bradyrhizobium japonicum USDA110 and Bradyrhizobium elkanii USDA94, in phylog...

2004
Giovanni Visco Luigi Campanella Francesco Bellanti Valentina Nobili Tommaso Mazzella

Analytical determination of organic load (the whole organic substance present in water as dissolved or/and in suspension form) in aqueous matrices is of continuously increasing interest in environmental chemistry. The most used indexes are BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand) and TOC (Total Organic Carbon); various normative and analytical line guides have been elaborat...

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