Use of a luminescent bacterial biosensor for biomonitoring and characterization of arsenic toxicity of chromated copper arsenate (CCA)

摘要: The increase of arsenic (As) concentration on the earth’s surface is due both to natural sources, such as volcanic activity and weathering processes, anthropogenic mining activities, agricultural forestry applications. One example contamination in environment use arsenic-containing wood preservatives. most extensively used preservative chromated copper arsenate (CCA), which pressurised into through a process called ‘Wolmanizing’ [1]. Wood intended for marine uses receives 24–40 kg CCA per cubic meter prevent its destruction by bacteria, fungi insects. Each three chemicals known be toxic aquatic biota at concentrations above trace levels, found leached from treated fresh sea water [2–4]. Chemicals CCA-treated can affect organisms that grow itself those live adjacent bulkheads, also adsorbed onto sediments, where they slowly released or taken up benthic [4–6]. rate metal accumulation sediments benthos differs with each chemical order: Cu>As>Cr, decreases distance time [1, 7]. Benthic living near bulkheads were contain elevated levels Cu As. number individuals, well species diversity, decreased sites Pathologic genotoxic effects have been observed oysters (Crassostrea virginica) [8]. In addition, was shown growth PCP-degrading bacterial their ability degrade PCP [9, 10]. Thus, monitoring bioavailable amounts wood, important order detect rectify effects. Among constituents CCA, abundant environment, carcinogenic teratogenic humans upon chronic exposure [11, 12]. Therefore, focus this study biomonitoring toxicity.