Effects of Layer Double Hydroxide Nanoclays on the Toxicity of Copper to Daphnia Magna

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Nanoparticles may affect secondary pollutants such as copper. Layer Double Hydroxides (LDH) are synthetically produced nanoparticles that adsorb copper via cation exchange. Pretreatment of copper test solutions with LDH nanoparticles followed by filtration removal of LDH nanoparticles demonstrated the smallest LDH aggregates removed the most copper toxicity. This was due to increased surface area for cation exchange relative to larger particle aggregates. Co-exposure tests of copper chloride and clay were run to determine if smaller clay particles increased copper uptake by D. magna. Coexposure treatments had lower LC50 values compared to the filtration tests, likely as a result of additive ... continued below

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Blake, Deanne Renee May 2012.

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  • Blake, Deanne Renee

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Nanoparticles may affect secondary pollutants such as copper. Layer Double Hydroxides (LDH) are synthetically produced nanoparticles that adsorb copper via cation exchange. Pretreatment of copper test solutions with LDH nanoparticles followed by filtration removal of LDH nanoparticles demonstrated the smallest LDH aggregates removed the most copper toxicity. This was due to increased surface area for cation exchange relative to larger particle aggregates. Co-exposure tests of copper chloride and clay were run to determine if smaller clay particles increased copper uptake by D. magna. Coexposure treatments had lower LC50 values compared to the filtration tests, likely as a result of additive toxicity. LDH nanoclays do reduce copper toxicity in Daphnia magna and may serve as a remediation tool.

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  • May 2012

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  • Nov. 6, 2012, 3:03 p.m.

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  • Nov. 16, 2016, 5:39 p.m.

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Blake, Deanne Renee. Effects of Layer Double Hydroxide Nanoclays on the Toxicity of Copper to Daphnia Magna, thesis, May 2012; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc115048/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .