Physicochemical characteristics and toxicity studies of crude oil, dispersant and crude oil-- dispersant test media to marine organisms
نویسندگان
چکیده
In this study, the physicochemical characteristics of crude oil, dispersant and oil-dispersant test systems their toxicities on representative marine organisms in a simulated ecosystem was assessed. Mechanically dispersed oil-in-water system (MDO) its water accommodated fraction (WAF) alone, combination with third generation (D) (Ecobest®), which gave rise to chemically (CDO) (CEWAF), as well reference toxicant, sodium dodecyl sulphate (SDS) were used evaluate selected (Fish – Tilapia guineensis, Crustacean Palaeomontes africanus, Bacteria Total heterotrophic bacteria hydrocarbon utilizing bacteria). Physicochemical done using standard methods. The static renewal bioassay option employed for toxicity tests involving Fish Crustacean, while without microbial bioassays. Marine exposed following concentrations: 1000, 500, 250, 125, 62.5 0 mg/L MDO, CDO, D, WF CEWAF, respectively. LC50 (lethal concentration that resulted 50% mortality) at 96h factors determined. Results showed pH, dissolved oxygen levels sufficient sustaining aquatic habitation. Lead metal present high amounts system, but relatively low systems. Cd Ni also relative could be toxic lives. Toxicity data new dispersant, Ecobest® non-toxic tested toxicant (SDS), moderately toxic. WAF, CEWAF SDS 89.8, 225.6, 1891.8, 683.9, 528.1 1.37 T. 275.5, 137.7, 3800.9, 76.1, 168.3 9.99 P. 1658.5, 944.1, 17221.9, 228641.0, 1036319.3 3.84 total bacteria. SDS, most toxicants, reduced y several folds. However, presence some heavy metals, notably Pb, Ni, polycyclic aromatic hydrocarbons media water, there may likelihood bioaccumulation occur tissues organisms.
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ژورنال
عنوان ژورنال: Journal of Nigerian Society of Physical Sciences
سال: 2022
ISSN: ['2714-4704']
DOI: https://doi.org/10.46481/jnsps.2022.427