نتایج جستجو برای: nitrophenols
تعداد نتایج: 172 فیلتر نتایج به سال:
Secondary organic aerosol (SOA) is well-known to have adverse effects on air quality and human health. However, the dynamic mechanisms occurring during SOA formation and evolution are poorly understood. The time-resolved SOA composition formed during the photo-oxidation of three aromatic compounds, methyl chavicol, toluene and 4-methyl catechol, were investigated at the European Photoreactor. S...
OBJECTIVE To isolate, incubate, and identify 4-chlorophenol-degrading complex bacteria, determine the tolerance of these bacteria to phenolic derivatives and study their synergetic metabolism as well as the aboriginal micrpbes and co-metabolic degradation of mixed chlorophenols in river water. METHODS Microbial community of complex bacteria was identified by plate culture observation techniqu...
Lag Ba'Omer, a nationwide bonfire festival in Israel, was chosen as a case study to investigate the influence of a major biomass burning event on the light absorption properties of atmospheric brown carbon (BrC). The chemical composition and optical properties of BrC chromophores were investigated using a high performance liquid chromatography (HPLC) platform coupled to photo diode array (PDA) ...
The nitro phenol compounds are the largest and widely known group of industrial chemicals in use today. These compounds are organic molecules that contain at least one –NO2 group attached to the aromatic ring [1]. Nitrophenols are commonly used in pharmaceuticals, wood preservatives, rubber chemicals, dyes, pigments, explosives and industrial solvents [2]. O-nitrophenol (ONP) and m-nitrophenol ...
Partition coefficients of phenol, salicylic acid, and several environmentally important chloro- and nitrophenols in a supercritical CO2-water system were measured using direct cocurrent extraction of aqueous solutions of the individual solutes with CO2. Partitioning data on the nitrophenols and salicylic acid were obtained for the first time. To bypass the troublesome and error-prone analysis o...
A novel and sensitive ultrasound-assisted solid phase extraction (UASPE) method for pre-concentration and determination of ultra-trace amounts of nitrophenols and chlorophenols in water samples was demonstrated. Four hazardous phenolic compounds in water samples were extracted and monitored by high performance liquid chromatography. The results demonstrated that in the presence of Aliquat 336 (...
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