Toxicity of metals and metal mixtures: analysis of concentration and time dependence for zinc and copper

Utgikar, Vivek; Chaudhary, Navendu; Koeniger, Arthur; Tabak, Henry H.; Haines, John; Govind, Rakesh

doi:10.1016/j.watres.2004.05.022

Cited by 114 publications

(68 citation statements)

References 22 publications

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“…Copper was more toxic than zinc in relationship at the rate growth, chlorophyll-a content and, lipoperoxidation endpoints, wich is similar to what was reported by Utgikar et al (2004) in Vibrio fischeri. However, copper toxicity was lower than what was found by Kaneko et al (2004); these autors reported an IC50 at 0.11 mg L -1 of copper in Selenastrum capricornutum, similar values were reported by Bossuyt & Janseen (2004) in the same species, our Concentration : metal concentrations; CatCu: catalase activity exposured to copper; CatZn: catalase activity exposured to zinc; ClofCu: Chlorophyll-a exposured to copper; ClofZn: chlorophyll-a exposure to zinc; MdaCu: MDA production exposured to copper ; MdaZn : MDA production exposured to zinc; µCu: growth rate exposured to copper; µZn: growth rate exposured to zinc.…”

Section: Discussionsupporting

confidence: 84%

Assessment of catalase activity, lipid peroxidation, chlorophyll a, and growth rate in the freshwater green algae Pseudokirchneriella subcapitata exposed to copper and zinc

Soto¹,

Gaete²,

Hidalgo³

2011

lajar

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ABSTRACT. In this work, the effect of copper and zinc on green alga Pseudokirchneriella subcapitata was evaluated through catalase activity, lipid peroxidation by TBARS essay, growth rate, and the chlorophyll-a concentration. Catalase activity increased significantly (P < 0.05) in comparison to the control at 0.1 mg L -1 copper and 0.075 mg L -1 zinc, whereas the damage to the cell membrane expressed as nmols/10 6 cell of malondialdehyde increased significantly (P < 0.05) at 0.025 mg L -1 copper and 0.1 mg L -1 zinc. On the other hand, a significant (P < 0.05) decrease in chlorophyll-a concentration was found at 0.075 mg L -1 of both metals. The results showed that catalase activity, lipid peroxidation, and chlorophyll-a concentration were more sensitive to metals than the growth rate. Keywords: toxicity, bioassays, water quality, oxidative damage, Pseudokirchneriella subcapitata, Chile.Evaluación de la actividad de la catalasa, peroxidación lipídica, clorofila-a y tasa de crecimiento en la alga verde de agua dulce Pseudokirchneriella subcapitata expuesta a cobre y zinc RESUMEN. En este trabajo, se evaluó el efecto del cobre y zinc en la alga verde Pseudokirchneriella subcapitata a través de la actividad catalasa, peroxidación lipídica por el ensayo TBARS, tasa de crecimiento y concentración de clorofila-a. La actividad catalasa aumentó significativamente (P < 0,05) en comparación al control en 0,1 mg L -1 y 0,075 mg L -1 de cobre y zinc respectivamente, mientras que el daño en la membrana celular expresado en nanomols/10 6 células de malondialdehído aumentó significativamente en 0,025 mg L -1 y 0,1 mg L -1 de cobre y zinc respectivamente. Por otra parte, hubo una disminución significativa (P < 0,05) en la concentración de clorofila-a en ambos metales a 0,075 mgL -1 . Los resultados mostrados en actividad catalasa, peroxidación lipídica y concentración de clorofila-a son parámetros más sensibles que la tasa de crecimiento a los metales. Palabras clave: toxicidad, bioensayos, calidad de agua, daño oxidativo Pseudokirchneriella subcapitata, Chile.

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Section: Discussionsupporting

confidence: 84%

Assessment of catalase activity, lipid peroxidation, chlorophyll a, and growth rate in the freshwater green algae Pseudokirchneriella subcapitata exposed to copper and zinc

Soto¹,

Gaete²,

Hidalgo³

2011

lajar

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“…Corresponding to this result, it has been reported that Cd has higher inhibitory effect on nitrogen mineralization from our earlier research (Walpola et al, 2011). Though substantial reduction in microbial activity has been reported as the short-term response to toxic metals, habitats that have had high levels of metal contamination for years may still have microbial populations and activities that are smaller than the microbial populations and activities in uncontaminated habitats (Utgikar et al, 2004). The Nwuche and Ugoji (2008) reported that the rate of respiration of the soil microbial populations was inhibited by the metals and it was 2.51-2.56 μg of C g -1 at the beginning declined to 0.98, 1.08 and 1.61 μg of C g -1 in the Cu:Zn, Cu and Zn treated soils by the end of the incubation.…”

Section: Resultssupporting

confidence: 75%

Concentration Dependent Effect of Heavy Metals on Soil Carbon Mineralization

Walpola¹,

Yoon²

2012

Korean Journal of Soil Science and Fertilizer

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The present laboratory investigation was conducted to assess the effect of heavy metals on carbon mineralization. Soil was treated with three concentrations (50, 100 and 150 µmol g -1 soil) of two heavy metals (Cd and Zn) in a factorial combination of treatments replicated four times. Determination of carbon mineralization was carried out at 3, 7, 14, 21, 28, 42 and 56 days after metal treatments.. The amount of CO 2 -C released from heavy metal treated soils was found to be decreased at an increasing rate during the first 28 days, followed by slow release as incubation progressed. The total amounts of CO 2 -C released were 448, 382 and 348 mg kg -1 soil respectively for soils treated with 50, 100 and 150 µmol g -1 soil of Zn. The corresponding figures for Cd treated soils were 406, 354 and 282 mg kg -1 soil implying that dose-dependent reduction in cumulative CO 2 -C released from soils. The inhibition of carbon mineralization was found to be high in Cd treated soils than that of Zn treated. Therefore, tolerance and adaptation of the microbial community is likely to be related to the concentration and the type of metal. According to the results, carbon mineralization can be considered as possible indicator of soil pollution by means of heavy metals.

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“…Increased ecotoxicity was noted due to the coexistence of TiO 2 NPs and Ag NPs. This elucidates that the level of toxicity increases in the presence of a mixture of nanoparticles rather than the individual forms (Utgikar et al, 2004) and provides an understanding of the complex interaction between different substances.…”

Section: Introductionmentioning

confidence: 73%

Combined toxicity of two crystalline phases (anatase and rutile) of Titania nanoparticles towards freshwater microalgae: Chlorella sp

et al. 2015

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Toxicity of metals and metal mixtures: analysis of concentration and time dependence for zinc and copper

Cited by 114 publications

References 22 publications

Assessment of catalase activity, lipid peroxidation, chlorophyll a, and growth rate in the freshwater green algae Pseudokirchneriella subcapitata exposed to copper and zinc

Assessment of catalase activity, lipid peroxidation, chlorophyll a, and growth rate in the freshwater green algae Pseudokirchneriella subcapitata exposed to copper and zinc

Concentration Dependent Effect of Heavy Metals on Soil Carbon Mineralization

Combined toxicity of two crystalline phases (anatase and rutile) of Titania nanoparticles towards freshwater microalgae: Chlorella sp

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