Downstream assessment of chlorinated organic compounds in the bed-sediment of Aiba Stream, Iwo, South-Western, Nigeria

Olutona, Godwin O.; Olatunji, Stephen; Obisanya, Joshua Funminiyi

doi:10.1186/s40064-016-1664-0

Cited by 21 publications

(2 citation statements)

References 34 publications

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“…The outcomes of the research effort are thus presented. Olutona et al (2016) also noted the challenge of refuse dump within the coverage of this dam and its effect on the on the chlorinated organic compounds in the stream.…”

Section: Data Collection and Analysis: Direct Visitation Tomentioning

confidence: 97%

Sustainability and resilience of Aiba Dam in Iwo, Nigeria

Ogunbode¹,

Akande²,

Ogungbile³

et al. 2020

Journal of Applied Sciences and Environmental Management

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Aiba dam was created to supply pipe-borne water to the Iwo community and environ. This paper highlighted challenges to the dam survival and recommended opportunities for improvement in the light of deterring sociological and cultural barriers to its sustainability. The challenges facing the dam include natural viz:-climate change, sedimentation, senesce (ageing trees) and anthropogenic challenges which include management-related problems, urban sprawl, farming practices in the dam area and refuse dump. The paper suggested that relevant government agencies needs to be proactive on ensuring the sustainability of the dam especially in the areas of public enlightenment, reforestation, dredging of the dam, institution and implementation of relevant legal instruments; also, putting in place appropriate measures towards mitigating climate change impact to ensure the survival of the dam and to ascertain that it performs the purpose for which it was created. Further investigation to determine the status of the dam through the use of satellite imageries and geographic information system are suggested.

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Section: Data Collection and Analysis: Direct Visitation Tomentioning

confidence: 97%

Sustainability and resilience of Aiba Dam in Iwo, Nigeria

Ogunbode¹,

Akande²,

Ogungbile³

et al. 2020

Journal of Applied Sciences and Environmental Management

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“…The quest for an alternative environmentally benign approach i.e., bioprospecting for effective microorganisms to naturally detoxify βchlorinated compounds and their analogs, therefore deserves scientific consideration. Moreover, the high tendency of these compounds to bioaccumulate in living tissues and subsequently move higher up the food chain has been indicated (Barbarossa et al, 2016;Olutona et al, 2016). Aside from the added stability of 3-CP, the relative hydrophobicity of the compound also promotes its partitioning into the organic phase.…”

Section: Introductionmentioning

confidence: 99%

The potential of a novel β-specific dehalogenase from Bacillus cereus WH2 as a bioremediation agent for the removal of β-haloalkanoic acids

Muslem¹,

Edbeib²,

Wahab³

et al. 2017

MJM

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Aims: This study aims to describe the biochemical and kinetic properties of a dehalogenase produced by a bacterium, Bacillus cereus WH2 (KU721999), that is uniquely adept at degrading a β-haloalkanoic acid, i.e., 3-chloropropionic acid (3-CP), and using it as the bacterium's sole carbon source. The bacterium was isolated from abandoned agricultural land in Universiti Teknologi Malaysia that was previously exposed to herbicides and pesticides. Methodology and results: The B. cereus impressively removed 97% of 3-CP after 36 h of culturing. The intracellular WH2 dehalogenase of the bacterium was purified 2.5-fold and has an estimated molecular mass of 37 kDa. The highest activity of the dehalogenase was achieved under conditions of 30 °C and pH 7. The metal ions Hg 2+ and Ag 2+ substantially repressed the enzyme's activity, but the enzyme's activity was uninhibited by dithiothreitol (DTT) and EDTA. The WH2 dehalogenase showed a higher affinity for 3-CP (Km = 0.32 mM, kcat = 5.74 s-1) than for 3-chlorobutyric acid (3-CB) (Km = 0.52 mM; kcat = 5.60 s-1). The enzyme was ~1.6-fold more catalytically efficient (kcat/Km) in dehalogenating the three-carbon substrate 3-CP (17.8 mM-1 s-1) than the four-carbon 3-CB (11.2 mM-1 s-1). Conclusion, significance and impact of study: The novel B. cereus bacterium isolated in this study may prove applicable as a bioremediation agent to cleaning environments that are polluted with β-halogenated compounds. Furthermore, such an approach to treat polluted environments is more sustainable and potentially safer than chemical treatments.

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Current Status and Future Prognosis of Malaria Vector Control Pesticide Ecotoxicology and Xenopus sp.

Wolmarans

Bervoets

Meire

et al. 2019

Reviews of Environmental Contamination and Toxicology

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Whilst frogs are generally considered as good indicators of environmental change, they are not widely utilised as indicators in ecological studies. With much of current research relying on model organisms as proxies for other animals or even humans, toxicology data on these model organisms is important for higher tier risk assessment studies and ecological modelling. The issue at hand is that for some topics, even when looking at model organisms, this empirical data does not seem to be as common as expected when doing literature research. Malaria vector control (MVC) is often a sensitive subject due to the paradox surrounding it (Bouwman et al. 2011). The lack of toxicological data mentioned feeds into the issues complicating debates on the chemical vector control interventions. Although being in use for decades, there are still many unknowns regarding the environmental impact of these pesticides. Informed decision making and policies require that this information first be available. The main research problem investigated in this review is this lack of toxicological and biomonitoring data available for one of the model organisms (Xenopus laevis) representative of aquatic ecosystems, and to a lesser extent, anurans. Species from the Xenopus genus are endemic to Africa and their distribution includes many areas where malaria vector control is applied. Reliable toxicology data on these frogs regarding malaria vector control pesticides (MVCPs) would strengthen the use of these animals as bioindicators.

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Downstream assessment of chlorinated organic compounds in the bed-sediment of Aiba Stream, Iwo, South-Western, Nigeria

Cited by 21 publications

References 34 publications

Sustainability and resilience of Aiba Dam in Iwo, Nigeria

Sustainability and resilience of Aiba Dam in Iwo, Nigeria

The potential of a novel β-specific dehalogenase from Bacillus cereus WH2 as a bioremediation agent for the removal of β-haloalkanoic acids

Current Status and Future Prognosis of Malaria Vector Control Pesticide Ecotoxicology and Xenopus sp.

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