Predicting copper toxicity in estuarine and marine waters using the Biotic Ligand Model

Arnold, W. Ray; Santore, Robert C.; Cotsifas, Jeffrey S.

doi:10.1016/j.marpolbul.2005.06.035

Cited by 78 publications

(57 citation statements)

References 14 publications

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“…Free copper ions Cu + and Cu 2+ are highly bioavailable and thus toxic to aquatic organisms, whereas copper bound to organic matter is widely considered to be nonbioavailable [6][7][8][9][10][11][12][13][14][15][16][17][18]. We synthesized four new copper(II) complexes and evaluated them for larvicidal activity and determined their mode of toxicity to contribute to the design of better, safer materials.…”

Section: Introductionmentioning

confidence: 99%

Larvicidal activity of synthesized copper(II) complexes againstCulex quinquefasciatusandAnopheles subpictus

Gopinathan

Arumugham

2015

Journal of Taibah University for Science

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Malaria and lymphatic filariasis are two of the most common identifiable mosquito-borne parasitic diseases worldwide. Mosquitoborne disease is believed to be responsible for approximately 1 million deaths per year. Such diseases are controlled by use of insecticides; however, these may have undesired effects on non-target organisms. We therefore sought a suitable larvicidal compound that could replace insecticides by evaluating copper(II) complexes for larvicidal activity against Anopheles subpictus and Culex quinquefasciatus.Larvicidal bioassays were performed with five batches of 20 mosquito larvae in 249 mL water and 1.0 mL of complexes of the precursor [Cu(phen)(l-Thr)(H 2 O)](ClO 4 ) with semicarbazide, thiosemicarbazide, urea or thiourea; the control was dechlorinated tap water. The number of dead larvae was counted after 24 h of exposure. Dose-response assays were performed at concentrations ranging from 10.0 to 0.625 mg/L of the complexes. The complex with urea had the best larvicidal activity against C. quinquefasciatus and A. subpictus at all concentrations.Copper(II) complexes have potential larvicidal activity, and that with urea had dose-dependent activity.

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Section: Introductionmentioning

confidence: 99%

Larvicidal activity of synthesized copper(II) complexes againstCulex quinquefasciatusandAnopheles subpictus

Gopinathan

Arumugham

2015

Journal of Taibah University for Science

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“…The free copper ions (Cu + and Cu 2+ ) are the most bioavailable and thus toxic to aquatic organisms, whereas copper bound to organic matter is widely considered nonbioavailable (Arnold et al 2005). The antibacterial properties of copper, silver, and zinc have been widely utilized in advanced coating technologies, such as the design of materials for biomedical devices, hospital equipment, food processing and storage equipment, household materials, and antifouling paints (Mann et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Copper nanoparticles synthesized by polyol process used to control hematophagous parasites

Ramyadevi¹,

Jeyasubramanian²,

Marikani³

et al. 2011

Parasitol Res

113

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The present study was based on assessments of the anti-parasitic activities of the hematophagous (blood feeding) larvae of malaria vector, Anopheles subpictus Grassi, filariasis vector, Culex quinquefasciatus, Say (Diptera: Culicidae), and the larvae of cattle tick Rhipicephalus (Boophilus) microplus, Canestrini (Acari: Ixodidae). The metallic copper nanoparticles (Cu NPs) synthesized by polyol process from copper acetate as precursor and Tween 80 were used as both the medium and the stabilizing reagent. The efficacy of synthesized Cu NPs was tested against the larvae of blood-sucking parasites. UV-vis spectra characterization was performed, and peak was observed at 575 nm, which is the characteristic to the surface plasmon bond of Cu NPs. The strong surface plasmon absorption band observed at 575 nm may be due to the formation of non-oxidized Cu NPs. X-ray diffraction (XRD) spectral data showed concentric rings corresponding to the 26.79 (111), 34.52 (200), and 70.40 (220) reflections. XRD spectrum of the copper nanoparticles exhibited 2θ values corresponding to the copper nanocrystal. No peaks of impurities are observed in XRD data. The scanning electron micrograph (SEM) showed structures of irregular polygonal, cylindrical shape, and the size range was found to be 35-80 nm. The size of the Cu NPs was measured by atomic force microscope (AFM) in non-contact mode. For imaging by AFM, the sample was suspended in acetone and spins coated on a silicon wafer. The line profile image was drawn by the XEI software and the horizontal line at 6 μm on a 2D AFM image. Research has demonstrated that metallic nanoparticles produce toxicity in aquatic organisms that is due largely to effects of particulates as opposed to release of dissolved ions. Copper acetate solution tested against the parasite larvae exposed to varying concentrations and the larval mortality was observed for 24 h. The larval percent mortality observed in synthesized Cu NPs were 36, 49, 75, 93,100; 32, 53, 63, 73, and 100 and 36, 47, 69, 88, 100 at 0.5, 1.0, 2.0, 4.0, and 8.0 mg/L against A. subpictus, C. quinquefasciatus and R. microplus, respectively. The larval percent mortality shown in copper acetate solution were 16, 45, 57, 66 and 100, 37, 58, 83, 87, and 100 and 41, 59, 79, 100, and 100 at 10, 20, 30, 40, and 50 mg/L against A. subpictus, C. quinquefasciatus, and R. microplus, respectively. The maximum efficacy was observed in Cu NPs and copper acetate solution against the larvae of A. subpictus, C. quinquefasciatus, and R. microplus with LC(50) and r (2) values of 0.95 and 23.47, 1.01 and 15.24, and 1.06 and 14.14 mg/L with r (2) = 0.766; 0.957 and 0.908; 0.946; and 0.816 and 0.945, respectively. The control (distilled water) showed nil mortality in the concurrent assay. The chi-square value was significant at p ≤ 0.05 level. This is the first report on anti-parasitic activity of the synthesized Cu NPs and copper acetate solution.

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“…DOC and salinity are also critical factors that affect the bioavailable fraction of Cu in saltwater (Arnold et al 2005).…”

Section: Effectsmentioning

confidence: 99%

Aquatic risk assessment of copper in freshwater and saltwater ecosystems of South Florida

2008

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A screening-level aquatic risk assessment was conducted for copper in south Florida's freshwater and saltwater environments. Risk was quantified by comparing the overlap between the probability distributions of copper exposure from surface water and sediment with the probability distributions of effects data obtained from laboratory studies. Copper concentrations in surface water and sediment in south Florida were summarized by county. For surface water, the highest concentrations of copper were found in Martin and St. Lucie counties for freshwater and saltwater, respectively. From the exposure probability distributions, the 90th centile values were estimated at 14.0 microg/L and 15.4 microg/L in freshwater and saltwater, respectively. Copper concentrations in sediment were evaluated from a probability distribution of predicted pore water concentrations. The 90th centile values of pore water concentrations from freshwater sediments ranged from 5.0 microg/L in Palm Beach County to 71.7 microg/L in Broward County. In saltwater sediments, the 90th centile values for pore water ranged from 26.1 microg/L in St. Lucie County to 27.3 microg/L in Miami-Dade County. Ecological effects data were obtained for acute and chronic copper effects in freshwater and saltwater. The 10th centile values for acute effects data were 21.2 microg/L and 9.8 microg/L for freshwater and saltwater species, respectively. For chronic effects, the 10th centile values were 3.8 microg/L and 3.9 microg/L for freshwater and saltwater species, respectively. The risk of acute copper exposure in surface water was generally low; however, the potential for ecological risk from chronic copper exposure was low to high in several counties including Lee, Martin, and St. Lucie counties. The risk of acute copper exposure in porewater from freshwater sediments also was low with the exception of St. Lucie and Broward counties. However, porewater from saltwater sediments posed a significant acute risk in Miami-Dade and St. Lucie counties. In porewater from freshwater and saltwater sediments chronic risk was high in counties with sufficient data available to calculate risk estimates.

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Predicting copper toxicity in estuarine and marine waters using the Biotic Ligand Model

Cited by 78 publications

References 14 publications

Larvicidal activity of synthesized copper(II) complexes againstCulex quinquefasciatusandAnopheles subpictus

Larvicidal activity of synthesized copper(II) complexes againstCulex quinquefasciatusandAnopheles subpictus

Copper nanoparticles synthesized by polyol process used to control hematophagous parasites

Aquatic risk assessment of copper in freshwater and saltwater ecosystems of South Florida

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