[Photodegradation of nonylphenol polyethoxylates in aqueous solution].

Fate of nonylphenol polyethoxylates and their metabolites in four Beijing wastewater treatment plants.

Four Beijing wastewater treatment plants (WWTPs) were selected to investigate behaviours of nonylphenol polyethoxylates and their metabolites in different wastewater treatment processes. The results showed that the total concentrations of nonylphenolic compounds in the influents of the four WWTPs ranged from 0.115 to 0.347 mumol/L, as well as their removal efficiencies ranging from 75.7% to 90....

Photodegradation of Insecticide Chlorpyrifos in Aqueous Solution under Simulated Solar Light Irradiation Conditions using Babolrood River Water

Chlorpyrifos is an organophosphate insecticide, used to control foliage and soil-borne insect pests on a variety of food and feed crops. In the natural environment, Chlorpyrifos can be degraded  through  several  possible  processes,  including  photodegradation, biodegradation,  and hydrolysis.  In  the  present  work  the  photodegradation  and  environmental  fate  of  Chlorpyrifos  in aqueo...

Evaluation of an Accurate-mass Quadrupole Time-of-flight (q-tof) Lc/ms System for the Determination of Trace-level Nonylphenol Polyethoxylates in Effluents from Non- Activated Sludge Biofilm Reactors

The ability of a contemporary accurate-mass Q-TOF instrument coupled to a UHPLC to detect trace levels of nonylphenol polyethoxylates (NPEOs) in complex wastewaters has been investigated. NPEOs are environmentally hazardous substances that affect aquatic organisms. The study was motivated by the “confirmation of contaminants” concept, which is based on the use of identification points (IPs) as ...

PA-2 Determination or nonylphenol polyethoxylates and their biodegradation products in sewage treatment plant sludge by conventional HPLC with fluorescence detector

Simultaneous determination of degradation products of nonylphenol polyethoxylates and their halogenated derivatives by solid-phase extraction and gas chromatography-tandem mass spectrometry after trimethylsilylation.

An efficient method for the simultaneous determination of the degradation products of nonylphenol polyethoxylates (NPnEOs, n = number of ethoxy units), i.e., nonylphenol (NP), NPnEOs (n = 1-3), nonylphenoxy carboxylic acids (NPnECs, n = 1-2, number of ethoxy units plus an acetate) and their halogenated derivatives (XNP, XNP1EO and XNP1EC; X = Br or Cl), in water samples were developed. After tr...