Acute Toxicity of Water-Accommodated Fraction and Chemically Enhanced WAF of Bunker C Oil and Dispersant to a Microalga Tetraselmis tetrathele

Abstract

This study assessed the toxicity of water-accommodated fraction (WAF) and chemically enhanced WAF (CEWAF) of bunker C oil and dispersant (DISP) to a microalga, Tetraselmis tetrathele. The 72-h median effective concentration (72-h EC50) of CEWAF and DISP were determined at 3.30% and 2.40%, respectively. The no observed effect concentration (NOEC) of CEWAF to T. tetrathele was at 2.0% and lowest observed effect concentration (LOEC) was at 3.0% while NOEC and LOEC of DISP to T. tetrathele were determined at 1.0% and 2.0%, respectively. The addition of dispersant to oil increased the amount of total PAH present in the CEWAF test solutions. DISP alone was highly toxic, and the toxicity of CEWAF was primarily caused by the presence of dispersant.

Ecotoxicity Studies for On-Site Disposal of Decant Water During Oil Spills: A Review

“…Crude oils appeared moderate acute toxicity (>1.0 ppm) to signal algal species. Bunker C oil WAF had low toxicity to a microalga (Tetraselmis tetrathele) (Santander-Avanceña et al, 2016). Low concentrations of WSF (100-300 mg/L) in seawater resulted in minor damage to phytoplankton, and on some occasions, even promoted the algae growth (Ohwada et al, 2003).…”

Toxicity bioassay of waste cooking oil-based biodiesel on marine microalgae

“…However, only limited information is available on the aquatic toxicity of biodiesel or other biofuels. Petroleum-related pollutants are a worldwide threat to aquatic organisms and humans [[14], [15], [16], [17]], so the ecotoxicity of biodiesel biofuel needs to be examined in terms of its impact on such species.…”