This paper investigates the potential use of composted cotton gin trash (CCGT) as a pesticide sorption medium in remediation of contaminated tailwater. CCGT was found to contain a large organic matter fraction (25.22%). Sorption of endosulfan sulfate and diuron, using the batch equilibrium method, was rapid but not limited for the range of applied concentrations, with diuron failing to reach eq...

The solar photocatalytic degradation of diuron, which is one the herbicides, has been studied by a pilot plant in heterogeneous photocatalysis with titanium dioxide. was made up compound parabolic collectors specially designed for applications. influence different variables such as, H2O2 initial concentration, TiO2 and diuron concentration their relationship to efficiency were studied. Hydrogen...

A batch reactor was used to determine sorption kinetic parameters (k2, F, and K*) and the equilibrium sorption coefficient (K). The two-site nonequilibrium (TSNE) batch sorption kinetics model was used to calculate the kinetic parameters. Two probe organic pesticides, atrazine [2-chloro-4-ethylamino-6-isopropylamino-s-triazine] and diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea] were studied u...

Tropical seagrasses are at their highest risk of exposure to photosystem II (PSII) herbicides when elevated rainfall and runoff from farms transports these toxicants into coastal habitats during summer, coinciding with periods of elevated temperature. PSII herbicides, such as diuron, can increase the sensitivity of corals to thermal stress, but little is known of the potential for herbicides to...

Diuron and bentazon are very strong inhibitors of the photosynthetic electron transport in isolated radish chloroplasts. The chlorosis producing herbicide SAN 6706 also inhibited the photosystem II dependent oxygen evolution. Aminotriazole had no effect. The inhibitor concentration for 50% inhibition of photosystem II activity was 10-7 m for diuron and 10-4 m for bentazon and SAN 6706 respectiv...

This study investigated effect of repeated exposure to low doses of diuron in gilthead sea bream by measuring the activities of the following antioxidant enzymes: Superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione reductase (GR), glutathione transferase (GST), and DT-diaphorase (DTD). Examination of the lipid peroxidation (malondialdehyde contentMDA) and gluco...

The isolation of microorganisms from soil impacted by xenobiotic chemicals and exposing them in the laboratory to the contaminant can provide important information about their response to the contaminants. The purpose of this study was to isolate bacteria from soil with historical application of herbicides and to evaluate their potential to degrade diuron. The isolation media contained either g...

An ecological impact assessment of four herbicides (atrazine, diuron, paraquat and simazine) was assessed using the aquatic floating vascular plants, Lemna gibba, Lemna minor and Lemna paucicostata as test organisms. The sensitivity of several ecologically relevant parameters (increase in frond area, root length after regrowth, maximum and effective quantum yield of PSII and maximum electron tr...

in toxicokinetics; AK UF , uncertainty factor for human variability in toxicokinetics; HPLC, high-performance liquid chromatograph. ABSTRACT Diuron, a widely used herbicide and antifouling biocide, has been shown to persist in the environment and contaminate the drinking water. It has been characterized as a " known/likely " human carcinogen. While the environmental transformation and toxicity ...