Sublethal effects of industrial chemicals on fish fingerlings (Tilapia guineensis)

Abstract

Tilapia guineensis commonly found in the Niger Delta ecological zone of Nigeria was exposed to sublethal concentrations (1.56, 3.13 mg/l) of neatex (industrial detergent) and norust CR 486 (corrosion inhibitor) using the Organisation for Economic Cooperation and Development (OECD) # 203 protocol. At test termination on the 28th day, the rate of bioaccumulation of surfactants in the fish gills, gut and muscle tissues were measured. The levels of surfactant in the gills, gut and muscle tissues were significantly different at levels of p < 0.05 in fish exposed to neatex and norust CR 486. Surfactant levels in the fish also increased significantly with increase in concentrations. Surfactant accumulation in the test treatments may be an indication that the observed effects on the exposed fish may have been due to the chemicals. This study demonstrates the sublethal effects of surfactant-containing industrial chemicals on T. guineensis, an economic and ecologically important sentinel.

Impacts of acute exposure of industrial chemicals and pesticides on the survival of fish (Tilapia guineensis) and earthworms (Aporrectodea longa)

“…Other studies which showed similar comparison include the research works by several other Authors. [9][10][11]18,[34][35][36][37][38][39] Soil organisms enhance soil aggregation and porosity, thus increasing infiltration and reducing runoff. Earthworms are an important component of the soil system, and can enhance plant growth by improving soil fertility and nutrient recycling.…”

“…All these could subsequently lead to reduction as well as extinction of some vital species. [5][6][7][8][9] Industrial chemicals (demulsifiers, corrosion inhibitors and dispersants) mainly of surfactant-based commonly used by industrial petroleum operators may cause environmental problems including the toxicity of the surfactants to fish and invertebrates, foaming and euthrophication. 10,11 A foaming agent is a material that facilitates formation of foam such as a surfactant.…”

“…However, apart from the direct effect, these chemicals can reduce the availability of food for man's consumption. 9,10,18 The objective of this study was to evaluate the acute effects of four chemicals (Rigwash, Oil eater, Nalco EC1304A/COT 505, Glycol™) and four pesticides (Propoxur, Deltamethrin, Atrazine, Furadan) using fish (Tilapia guineensis) and earthworm (Aporrectodea longa) with a view to determining their safe limits. The industrial chemicals were assessed due to their indiscriminate use in oil spill clean-up in Niger Delta waters.…”

Analitical Method Validation of Anionic Surfactant Sodium Dodecyl Benzene Sulfonate (Sdbs) in Catfish by Uv-Vis Spectrophotometry Using Acridine Orange

“…Surfaktan merupakan salah satu bahan yang dapat dimanfaatkan diberbagai bidang kehidupan, baik di bidang industri, makanan, rumah tangga, kosmetik dan farmasetika (Ogeleka et al, 2010). Surfaktan merupakan bahan aktif yang unik karena mempunyai sisi hidrofobik dan sisi hidrofilik, dan mampu berinteraksi dengan pelarut sehingga dapat menurunkan tegangan permukaan (Knepper et al, 2003).…”

“…Metode spektrofotometri juga banyak digunakan untuk analisis surfaktan anionik. Analisis secara spektrofotometri dapat dilakukan dengan menggunakan pereaksi methylene blue (Ogeleka et al, 2010), ethyl violet (Yamamoto and Motomizu, 1987), rhodamine B dan rhodamine 6G (Tajalli et al, 2009), dan acridine orange ( Adak et al, 2005). Terdapat beberapa kekurangan dalam analisis surfaktan anionik dengan metode dan pereaksi tersebut, yaitu bahan yang kurang ramah lingkungan dan biaya operasionalnya mahal.…”