CCA News & Information Articles

Thames View Marina wins inaugural Green Star award 10-23-2003 In order to protect water quality, the design team for the proposed new marina are replacing creosote pilings and pressure-treated wood with newer environmentally sound pilings Biotransformation of arsenate to the tetramethylarsonium ion in the marine polychaetes Nereis diversicolor and Nereis virens. pub med This is the first report of significant biomethylation of arsenic to the tetramethyl stage and provides a ready explanation for the widespread occurrence of tetramethylarsonium ion in marine animals. The importance of the short-term leaching dynamics of wood preservatives. 06-27-2003 Arsenic, Copper Found in Reston Lake 05-29-2003 Up to half of the arsenic can be attributed to nearby Chromated Copper Arsenate (CCA)-treated wood from decks, docks, bulkheading and fences located immediately adjacent to the lake. Most of the remaining arsenic in the lake sediments came from streams feeding the lake that most likely carried that arsenic from other sources of CCA-treated wood upstream. Contamination of saltmarsh sediments and biota by CCA treated wood walkways. 06-27-2003 Anthropogenic sources of arsenic and copper to sediments in a suburban lake, Northern Virginia. 06-27-2003 Results of this study suggest that CCA-treated lumber and road runoff could be significant nonpoint sources of arsenic and copper, respectively, in suburban catchments. Various References to papers by by Weis, J.S. and P. Weis 07-16-2002 These papers show the dangers of cca and in particular copper in aquatic conditions. Judith Weis's contact is Jweis@andromeda.rutgers.edu Treated wood linked to aquatic damage 07-06-2002 by Janet Pelley Although alternative wood treatments are much safer than CCA-treated wood for terrestrial uses, they are five times more toxic to aquatic organisms because of their high copper content, say Florida researchers. Environmental biochemistry of arsenic. Microorganisms are involved in the redistribution and global cycling of arsenic. Arsenic can accumulate and can be subject to various biotransformations including reduction, oxidation, and methylation Biotransformation of the pesticide sodium arsenate. pub med Hi Everybody, For those of you not up on your forms of arsenic, when you see the words arsine, it means it is in it’s gaseous form. The kind of reaction we are being told does not occur in cca wood. If you have been reading the abstacts I have been sending out you will see that clearly cca wood can off gas through a variety of means. It appears to be able to do this either from the wood itself or from the environments that it leaches into. Nature and the laboratory provide very different settings. Take care everybody and please keep safe. Deborah Bacterial degradation of arsenobetaine via dimethylarsinoylacetate. pub med The work establishes the capability of particular bacteria to cleave both types of arsenic-carbon bonds of arsenobetaine and demonstrates that mixed-community functioning is not an obligate requirement for arsenobetaine biodegradation. Biotransformation of arsenate to the tetramethylarsonium ion in the marine polychaetes Nereis diversicolor and Nereis virens. pub med This is the first report of significant biomethylation of arsenic to the tetramethyl stage and provides a ready explanation for the widespread occurrence of tetramethylarsonium ion in marine animals. Speciation of arsenic in water, sediment, and plants of the Moira watershed, Canada, using HPLC coupled to high resolution ICP-MS. pub med Bacterial degradation of arsenobetaine via dimethylarsinoylacetate Microorganisms from Mytilus edulis (marine mussel) degraded arsenobetaine, with the formation of trimethylarsine oxide, dimethylarsinate and methylarsonate Speciation of arsenic in water, sediment, and plants of the Moira watershed, Canada, using HPLC coupled to high resolution ICP-MS 07-21-2003 Toxicity of construction materials in the marine environment: a comparison of chromated-copper-arsenate-treated wood and recycled plastic Weis P, Weis JS, Greenberg A, Nosker TJ. The current study compared effects of leachates from CCA-treated wood with those of recycled plastic "lumber," a possible alternative construction material.