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Effect of colloid-size copper-based pesticides and wood preservatives against microbial activities of Gram-positive Bacillus species using five-day biochemical oxygen demand test
Citation:
Tegenaw, A., G. Sorial, AND E. Sahle-Demessie. Effect of colloid-size copper-based pesticides and wood preservatives against microbial activities of Gram-positive Bacillus species using five-day biochemical oxygen demand test. Journal of Environmental Sciences. Elsevier BV, AMSTERDAM, Netherlands, 105:71-80, (2021). https://doi.org/10.1016/j.jes.2020.12.037
Impact/Purpose:
This study discusses the fate of nanowood preservative that is based copper oxide particle. The findings of this study provide insight into how organics compounds that leached out from woods significantly reduce the toxicity of Cu against Gram-positive Bacillus species.
Description:
Copper-based pesticides and wood preservatives could end up in the environment during production, use, and end-of-life via different pathways that could cause unintended ecological and adverse health effects. This paper provides the effect of colloid-size Cu-based pesticides (CuPRO and Kocide), micronized Cu azole (MCA-1 and MCA-2) and alkaline Cu quaternary (ACQ) treated woods, Cu2+, Cu2+ spiked untreated wood (UTW), and CuCO3 solutions against Gram-positive Bacillus species using five-day biochemical oxygen demand (BOD5) standard test. The total Cu leached from MCA-1, MCA-2, and ACQ in Milli-Q water after 5 days were ~0.1, ~0.11, and ~0.64 g/kg of wood, respectively. However, the form of Cu leached from MCA woods was mostly ionic (> 90%). The total organic carbon (TOC) content of any tested wood (UTW/MCA-1/MCA-2/ACQ) was ~99% of its corresponding total carbon (TC) content, whereas the TOC of any tested wood sawdust exceeded that of its corresponding piece/block by > 300%. The dissolved oxygen (DO) consumption value in the presence of Cu2+, CuCO3, CuPRO, and Kocide solutions was significantly influenced by Cu particles/ions. However, the DO consumption value in the presence of UTW/MCA-1/MCA-2/ACQ woods was significantly influenced by organics leached from woods.
URLs/Downloads:
DOI: Effect of colloid-size copper-based pesticides and wood preservatives against microbial activities of Gram-positive Bacillus species using five-day biochemical oxygen demand test
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