Contamination of estuarine water, biota, and sediment by halogenated organic compounds:  a field study

Pereira, Wilfred E.; Rostad, Colleen E.; Chiou, Cary T.; Brinton, Terry I.; Barber, Larry B.; Demcheck, Dennis K.; Demas, Charles R.

doi:10.1021/es00172a005

Cited by 111 publications

(58 citation statements)

References 20 publications

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“…Discharge of industrial effluents containing organic contaminants into coastal inlets and estuaries is a relatively common practice, the reasoning being that the ocean generally is considered to be a disposal medium in which the adverse effects of hazardous organic compounds are minimized by infinite dilution (Pereira et al 1988). Chlorophenol concentrations in industrial effluents range between 0.5 and 10,000 μg L −1 (Ettala et al 1992;Jank and Fowlie 1980;Melcer and Bedford 1988;Petrasek et al 1983) while they do not exceed 10 μg L −1 in marine environments (Wegman and Hofstee 1979;Jennings et al 1996;Dimou et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Removal of p-chlorophenol by the marine microalga Tetraselmis marina

et al. 2007

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The ability of Tetraselmis marina, a green coastal microalga, to remove chlorophenols under photoautotrophic conditions was investigated. T.marina was able to grow in the presence of 20 mg L −1 of the phenolic compounds tested. The EC 50 (growth rate) value of p-chlorophenol (p-CP) to T.marina was found to be 25.5 mg L −1 . The microalga was able to remove chlorophenols, showing higher efficiency for p-CP. The effect of photoregime and NaHCO 3 concentration on p-CP removal was investigated. Under continuous illumination with 1 g L −1 NaHCO 3 initial concentration T.marina removed 65% of 20 mg L −1 in a 10-day cultivation period.

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Section: Discussionmentioning

confidence: 99%

Removal of p-chlorophenol by the marine microalga Tetraselmis marina

et al. 2007

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“…Similarly, in terrestrial ecosystems, application of the 3-phase model to studies of pollutants has led to substantial concern about contamination of ground-water and, with less immediate concern, about the risks of soil-bound contaminants. Other partitioning coefficients also may be employed, notably a soil/sediment partitioning coefficient and a water-solubility coefficient (Periera et al 1988). All are based on the principle of passive diffusion.…”

Section: The 3-phase Modelmentioning

confidence: 99%

“…, Periera et al 1988, Connell et al 1993, Mitra & Dickhut 1999, Mirtagotri 2002. Such apparent affirmation of the 3-phase model has resulted in its uncritical acceptance.…”

Section: Abiotic Partitioning Coefficient (K Ow ) Testsmentioning

confidence: 99%

Protein model for pollutant uptake and elimination by living organisms and its implications for ecotoxicology

Quinnell¹,

Hulsman²,

Davie³

2004

Mar. Ecol. Prog. Ser.

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The conceptual model on which chemical assessment of pollutants is based is flawed. The assumption in ecotoxicology -that pollutants cross the biological membrane only by passive diffusion of their solute phase (diffusion model) and thus, that only water-soluble pollutants are biologically available -is inconsistent with the biologists' understanding of the role and functioning of the biological membrane. The biological membrane both isolates organisms, cells and organelles from their external environments and regulates cross-membrane trafficking of polar and non-polar substances. Trafficking regulation is a function of proteins dissolved within the membrane. An alternative protein model for pollutant uptake and elimination is proposed that provides a credible explanation of how solid-phase pollutants, such as those bound to aquatic sediments and soils, may be readily incorporated by living organisms. Current chemical testing is likely to underestimate the risk posed to organisms by sediment and soil-bound pollutants. New techniques for assessing the bioavailability and impacts of pollutants, based on the protein model, are urgently needed.

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“…2,4-Dichlorophenol is mainly used in the production of the herbicide. Although its use has been strictly restrained, there is still a great amount of 2,4-DCP-containing wastewater being drained into the marine environment every year (Pereira et al 1988;Dimou et al 2006;Kot-Wasik et al 2004). …”

Section: Introductionmentioning

confidence: 99%

Biofilm-electrode process with high efficiency for degradation of 2,4-dichlorophenol

et al. 2010

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2,4-Dichlorophenol (2,4-DCP) from chemical industry wastewaters has caused serious environmental pollution. Removal of 2,4-DCP using either physicochemical or biological methods is not very efficient. In this paper, a combination of biological and electrochemical methods gave satisfactory results. By comparisons of the degradation of 2,4-DCP and the removal of chemical oxygen demand (COD) in electrochemical, biological and biofilm-electrode processes, it was found that the biofilmelectrode process possesses the highest degradation efficiency and removal rate; both the pure electrochemical and the pure biological processes were far less efficient. The removal efficiency of 2,4-DCP using the biofilm-electrode process was 100% in 48 h, while that using the pure electrochemical and the pure biological processes were 62 and 42%, respectively. The experiments show that the current of 5 mA for the cathode of 9 cm 2 and the initial concentration 100 mg/l of 2,4-DCP were the optimal parameters of technology for the biofilm-electrode process. The excellent effects are due to the withdrawing electron action of bacterium, electrochemically anodic oxidation and cathodic dechlorination. It is the first time that the biofilm-electrode method was applied in 2,4-DCP degradation. Here, we demonstrated that biofilm-electrode process is a promising method to remove some aromatic compounds in industrial wastewater.

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Contamination of estuarine water, biota, and sediment by halogenated organic compounds: a field study

Cited by 111 publications

References 20 publications

Removal of p-chlorophenol by the marine microalga Tetraselmis marina

Removal of p-chlorophenol by the marine microalga Tetraselmis marina

Protein model for pollutant uptake and elimination by living organisms and its implications for ecotoxicology

Biofilm-electrode process with high efficiency for degradation of 2,4-dichlorophenol

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