Histological changes in the liver of Oreochromis mossambicus (Cichlidae) after exposure to cadmium and zinc

Dyk, J C van; Pieterse, G. M.; Vuren, J.H.J. van

doi:10.1016/j.ecoenv.2005.10.012

Cited by 244 publications

(120 citation statements)

References 5 publications

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“…The abnormalities observed prior to mortality is an indication of depleted oxygen content due to higher demand for oxygen, this corresponds to the findings of Adewoye et al, (2005) that the observed characteristics features may have resulted from the organic loads in the wastewater and to different concentrations of toxicants. The high degree of lead and cyanide found in the effluent may have contributed a significant synergistic effects which resulted in the breakdown of vital metabolic functions that led to high mortality observed especially in the highest concentrations and this corresponds to the discovery of Van-Dyk et al, (2007) that the harmful effects of heavy metals pollution of fish depend on the duration of the exposure (chronic or acute) and the concentration level of the specific metal.…”

Section: Physicochemical Characteristics Of Syntheticmentioning

confidence: 99%

Acute toxicity of synyhetic resin effluent to African Catfish, Clarias gariepinus [BURCHELL, 1822]

Dahunsi¹,

Oranusi²

2012

AJFN

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Aquatic pollution as a field has gained a lot of attention over the decades majorly because of the vital role the aquatic environment plays in the human lifecycle. Indusrial wastewaters are often generated and discharged into the environment without treatment. Toxicity of effluents from Synythetic Resin production plant were evaluated in this study. Acute toxicity (96-h LC 50 ) was evaluated using 0.23, 0.31, 0.35 and 0.39 mg/L of the effluent in a renewal bioassay procedure. Physicochemical parameters of the effluent were also evaluated, the values obtained for lead, cyanide, total suspened solid, total hadness, total dissolved solids and alkalinity were higher than the Federal Environmental Protection Agency standard specification for effluent discharge into aquatic environment and as such contributed to the effluent's toxicity. Mortality increased as the concentrations of the effluent increases and 0.355mg/L was obtained as LC 50 . The research eventually revealed that the synthetic resin effluent has a high level of toxicity to catfish. Deleterious effects such as biomagnification and other abberations may occur in man if exposed to substantial concentration of the effluent.

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Section: Physicochemical Characteristics Of Syntheticmentioning

confidence: 99%

Acute toxicity of synyhetic resin effluent to African Catfish, Clarias gariepinus [BURCHELL, 1822]

Dahunsi¹,

Oranusi²

2012

AJFN

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“…Therefore, except GS, this wastewater would have no adverse impact on fauna and flora of receiving environment. The study stated that stated the range of the measured pH values was 9.56 -10.38, which is higher than the WHO permissible range of 6 -9 ( Figure 1) [3][4][5][6][7][8][9][10].…”

Section: Chemical Oxygen Demand= a -B × N × 8 × 1000mentioning

confidence: 99%

Assessment of the Physicochemical and Heavy Metal Concentration from Effluents of Paint Industry in Addis Ababa, Ethiopia

Berihun¹,

Solomon²

2017

Int J Waste Resour

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IntroductionIndustrialization is seen as a motor behind many of the processes usually termed "social transformation" and "modernization". Paint industry is one of the industries that cause the water pollution. Wastewater is generated primarily due to cleaning operations of mixers, reactors, blenders, packing machines and floors. Heavy metals have been found to be highly toxic especially when their natural concentrations are exceeded. At normal concentration, they promote the functions of the enzymes but could lead to a lot of adverse metabolic reaction when their concentration rises beyond tolerance limit. The untreated effluents contain a lot of pollutants that are harmful to human beings when they exceed the permissible limits. The Zemilli Paint Factory in Ethiopia produces maximum of 36,000 liters of paint per day and as a result it generates about 500 liters of liquid waste on average per day. This massive quantity of untreated effluent is disposed to the river side and cause considerable load on the water courses leading to widespread damage to aquatic life and to the environment. The problem is more severe in Addis Ababa, where most (More than 40% of large and medium scale manufacturing industries are located. Addis Ababa, like most developing cities, lacks the infrastructure, financial resources, and institutional capacity necessary to effectively manage industrial wastes and adequately control industrial pollution [1]. Paint manufacturing sector in Addis Ababa localized in different part of the sub city, most of them were concentrated in the residential and commercial area such as Nifas silk lafto sub city and Akaki Kality sub city. However, some of them are found in regional state. They have no proper waste discharging mechanism and no modern treatment plant which can handle their effluents waste accordingly. Materials and Methods Study areaThis study was employ on the city of Addis Ababa. Addis Ababa AbstractPaint industry is one of the industries that cause the water pollution by generating Wastewater primarily due to cleaning operations of mixers, reactors, blenders, packing machines and floors. The present research work deals with the study of some of the important physico-chemical and heavy metal parameters of paint industrial waste water effluents which was aimed at the analysis of the untreated effluents from six paint factories in Addis Ababa and the surrounding area. Analysis physico-chemical and heavy metal parameters of selected paint factories samples in Kadisco (KA), Zemilli (ZE), Rainbow (RA), Gastor solar (GA), Nifas silk (NI) and Modern building industry (MBI) were performed to investigate the concentration of status of the parameter. In this study, like; physico-chemical and heavy metal parameters pH, EC, TDS, TSS, COD, Cd, Cr, Pb, and Zn of the nine wastewater samples were analyzed using, Dana multi-meter, Jenway Model 4510 Conductivity/Temp Meter (451 001), Gravimetric, Volumetric, Colorimetric, flame emission photometry, and Atomic Absorption spectrometry (AAS)analyses methods. In t...

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“…The fish were acclimated for 4 weeks in 1000l tanks receiving continuous flow of dechlori-nated water at 25-28 °C (Van Dyk et al, 2007). The sub-lethal DDT exposures were conducted at nominal concentrations of 2 and 5|jig/l of 1,1-bis (4-chlorophenyl)-2,2,2-trichloroethane (DDT) (Sigma).…”

Section: Test Organismmentioning

confidence: 99%

Histopathological changes in the reproductive system (ovaries and testes) of Oreochromis mossambicus following exposure to DDT

Mlambo

Vuren

Barnhoorn

et al. 2009

Environmental Toxicology and Pharmacology

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A b s t r a c tThis study assesses the effects of 1,1-bis (4-chlorophenyl)-2,2,2-trichloroethane (DDT) on the reproduction and gonadal histology of adult Mozambique tipalia (Oreochromis mossambicus). The fish were allowed to breed, following exposure to 2 and 5 jig/l of waterborne technical-grade DDT for 40 days. Fertilized eggs were artificially incubated. In the 5 jig/l exposure, posthatch survival was significantly lower, and prevalence of larval skeletal deformities significantly higher, compared to the control (p<0.05). Incomplete axial development was the common gross deformity in posthatch larvae, caused by failure to develop chondroblasts posterior to the buccopharyngeal cavity. There were no significant differences in the gonadosomatic index of exposed and non-exposed male and female adults. The exposure caused increased oocyte atresia in the ovaries and disorganization of seminiferous lobules in the testes of adults. DDT exposure reduced survival and increased deformities in larvae, at levels that did not cause severe histopathological changes to parental gonads.

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Histological changes in the liver of Oreochromis mossambicus (Cichlidae) after exposure to cadmium and zinc

Cited by 244 publications

References 5 publications

Acute toxicity of synyhetic resin effluent to African Catfish, Clarias gariepinus [BURCHELL, 1822]

Acute toxicity of synyhetic resin effluent to African Catfish, Clarias gariepinus [BURCHELL, 1822]

Assessment of the Physicochemical and Heavy Metal Concentration from Effluents of Paint Industry in Addis Ababa, Ethiopia

Histopathological changes in the reproductive system (ovaries and testes) of Oreochromis mossambicus following exposure to DDT

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