Survival and gill morphology of different life stages of Tilapia guineensis exposed to the drilling fluid XP-07

Vincent-Akpu, Ijeoma Favour; Allison, M E; Sikoki, F.D.

doi:10.1590/s0103-84782010005000021

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…The exact chemical composition of the all varieties of drilling fluids are not known, but studies on their general composition have revealed that they contain complex mixtures of highly volatile materials and toxic substances, such as aromatic compounds and heavy metals (Vincent-Akpu et al, 2010). Drilling fluids are classified as either WBFs (or muds WBMs) or as non-aqueous-based fluids ([NABFs] or muds [NABMs]), in accordance with the chemical composition of the base of the fluid (Ogeleka &Tudararo-Aherobo, 2011).…”

Section: Types Of Drilling Fluidsmentioning

confidence: 99%

Toxicity of drilling fluids in aquatic organisms: a review

Aslan¹,

Weber²,

Iannacone³

et al. 2019

Ecotoxicol. Environ. Contam.

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Offshore oil-well drilling has been a subject of great interest to environmental regulatory agencies worldwide. The drilling fluids used in this process involve a complex mixture of chemicals and are largely discharged into the ocean. Acute and chronic toxicity tests have been done to better understand the effects of different types of drilling fluids on aquatic organisms. The aim of this article was to analyze all the studies related to the toxicity of drilling fluids published during the period of 2000 to 2017 by conducting a thorough review through the Scopus and Science Direct databases. Out of 154 articles, only 25 showed relevant information about the toxicity of drilling fluids. Acute toxicity tests were the predominant tests employed, appearing in 56% of the articles. Invertebrates were the most evaluated taxa, used in 64% of cases and represented mainly by Crustacea (32%), Mollusca (16%), and other invertebrates. Vertebrates were represented only by fish, constituting 32% of the cases. Water-based drilling fluids (WBFs) (32%) were the most frequently tested, followed by synthetic-based fluids or muds (SBFs) (24%) and oil-based fluids (OBFs) (16%). Individual components were tested in 12% of the cases, while 16% of studies included more than one type of drilling fluid. After analyzing the toxicity of drilling fluids and the sensitivity of aquatic organisms presented in 25 articles published in scientific journals, we concluded that WBFs-showing, in general, lower values of median lethal concentrations than do natural oil-and SBFs-are the most toxic drilling fluids to invertebrates in the short term. The gaps of information found in this review indicate that future studies need to address the acute and chronic effects of WBFs in both juvenile and adult fish and in other vertebrates; they also need to address the chronic effects of nonaqueous-based fluids on adult invertebrates. As crustaceans are more sensitive to drilling fluids than are mollusks, it is also recommended that they be used in future studies.

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Section: Types Of Drilling Fluidsmentioning

confidence: 99%

Toxicity of drilling fluids in aquatic organisms: a review

Aslan¹,

Weber²,

Iannacone³

et al. 2019

Ecotoxicol. Environ. Contam.

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“…The main structure of LS is n ‐phenylpropane. When LS grafts are added to drilling fluid as filtrate reducer, they are adsorbed on clay particles through n‐phenylpropane as hydrophobic main chain, and sulfonic acid groups enhance the electrostatic repulsion force between particles, which has a good dispersion effect on the system …”

Section: Introductionmentioning

confidence: 99%

Novel lignosulfonate/N,N‐dimethylacrylamide/γ‐methacryloxypropyl trimethoxy silane graft copolymer as a filtration reducer for water‐based drilling fluids

Liu

Zhang

Wang

et al. 2019

J of Applied Polymer Sci

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The redox system consisting of ammonium persulfate and sodium bisulfite was used as initiator, N,N-dimethylacrylamide (DMAA) and γ-methacryloxypropyl trimethoxy silane (KH570) were grafted onto sodium lignosulfonate (LS) in aqueous solution as reaction monomers, and a novel LS/KH570/DMAA graft copolymer filtrate reducer was synthesized. The structure of the copolymer was characterized by Fourier transform infrared spectrometer and nuclear magnetic resonance instrument. The result revealed that DMAA and KH570 were successfully grafted onto sodium LS. In addition, the thermal stability of the copolymer was determined by thermogravimetric analyzer and the micromorphology of filter cake of water-based drilling fluids (WBDFs) containing LS/KH570/DMAA was analyzed by scanning electron microscopy. At the same time, the rheological and filtration properties of WBDFs containing copolymer with different concentrations were further evaluated. The results showed that when the copolymer concentration was 3 wt %, the fluid loss of bentonite-based drilling fluids was only 6.2 mL before aging, and 9.8 mL after aging at 180 C for 16 h. The fluid-loss control mechanism of LS/KH570/DMAA was investigated through clay particle distribution analysis and zeta potential measurement of WBDFs. Moreover, the WBDFs containing copolymer exhibit excellent performance in reducing fluid loss under the invasion of calcium salts.

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Survival and gill morphology of different life stages of Tilapia guineensis exposed to the drilling fluid XP-07

Cited by 2 publications

References 6 publications

Toxicity of drilling fluids in aquatic organisms: a review

Toxicity of drilling fluids in aquatic organisms: a review

Novel lignosulfonate/N,N‐dimethylacrylamide/γ‐methacryloxypropyl trimethoxy silane graft copolymer as a filtration reducer for water‐based drilling fluids

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