&lt;b&gt;DETERMINATION OF FREE CYANIDE AND TOTAL CYANIDE CONCENTRATIONS IN SURFACE AND UNDERGROUND WATERS IN BOGOSO AND ITS SURROUNDING AREAS IN GHANA&lt;/b&gt;

Obiri, Samuel; Dodoo, D.K.; Okai-Sam, F.; Essumang, David Kofi

doi:10.4314/bcse.v21i2.21200

Cited by 13 publications

(8 citation statements)

References 7 publications

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“…To obtain crude protein value, nitrogen content values were multiplied by a factor of 6.25. For cyanide determinations, the method was in accordance with Obiri et al (2007).…”

Section: Chemical Analysismentioning

confidence: 99%

Heavy metal and proximate composition associated with the composting of cassava (Manihot esculenta) peels used in the cultivation of mushrooms in Ghana

Obodai¹,

Ofori²,

Dzomeku³

et al. 2014

Afr. J. Biotechnol.

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Changes in the heavy metal content and proximate composition during the 28 day composting of cassava peels used in the cultivation of the oyster mushrooms Pleurotus ostreatus strain EM-1 was studied. Significant dry weight variations of cellulose, hemicellulose and fat contents were observed from day 0 to 12. Decreases from day 12 to 28 had the values of 15.4, 57.6 and 56.12%, respectively, while lignin, protein and crude fibre values showed a gradual increase from day 0 to 28, with maximum values of 23.73, 49 and 73%, respectively. Cyanide content however showed a reduction from the initial 3.89 to 2.01 mg/L by day 12 and a marginal increase of 16 by day 28. This was however not detected in the mushroom harvested. The levels of heavy metal content in composted cassava peels in decreasing order was iron (Fe), manganese (Mn), zinc (Zn), lead (Pb) and copper (Cu) while that for uncomposted cassava was Fe, Zn, Pb, Mn and Cu. Levels of Cu, Mn, Pd and Zn in mushroom samples analysed were in agreement with reported values in literature. Of all the heavy metals examined, iron accumulated excessively, indicating that P. ostreatus strain EM-1 is a good bio-accumulator of Fe.

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“…To obtain crude protein value, nitrogen content values were multiplied by a factor of 6.25. For cyanide determinations, the method was in accordance with Obiri et al (2007).…”

Section: Chemical Analysismentioning

confidence: 99%

Heavy metal and proximate composition associated with the composting of cassava (Manihot esculenta) peels used in the cultivation of mushrooms in Ghana

Obodai¹,

Ofori²,

Dzomeku³

et al. 2014

Afr. J. Biotechnol.

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“…According to these guidelines, the free cyanide concentrations were found to be in safe levels owing to the low evaporation rates of cyanide in the water resources. The free cyanide concentration recorded in the present study was relatively lower than those found in the surface water of Obuasi area (Ndur and Amegbey 2013) and Bogoso (Obiri et al 2007), all in Ghana owing to extreme gold mining activities in these areas. There was a significant difference (p < 0.05) in free cyanide levels between the dam and borehole water samples.…”

Section: Resultsmentioning

confidence: 51%

Human health risk assessment of cyanide levels in water and tuber crops from Kenyasi, a mining community in the Brong Ahafo Region of Ghana

et al. 2017

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Background: Cyanide is among the most harmful substances on Earth and it is harmful to humans and most aquatic life even at low concentrations. Free, total cyanide levels and other physicochemical parameters were determined in fish, cassava, cocoyam, dam and borehole water samples collected from Kenyasi, Ghana. A total of sixteen (16) that the variation in free cyanide levels was significant (p < 0.05) in the fish, cassava, cocoyam, dam and borehole water samples. Moreover, the hazard index results via ingestion and dermal contact with children are >1, including fish ingestion by an adult. This signifies adverse non-carcinogenic risk. The persistent intake of cassava and cocoyam can probably induce adverse health effects. Conclusions: From the results, it can be concluded that fish, cassava and water samples at Dam 4, Dam 7 and BH1 were not safe for consumption since they recorded values higher than the set limits. Therefore, people are advised not to feed on the cassava product, fish and consume water samples located close to Dam 4, Dam 7 and BH1.

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“…The cyanide concentration is higher in red blood cells than in plasma by a factor of two or three, reflecting cyanide's tendency to bind with methaemoglobin. Cyanide may also accumulate in body cells by binding with metalloproteins or enzymes such as catalyses or cytochrome c oxidase [8][9][10]. The most important sources of cyanide pollution in the surface water is through mining operations and industrial and agricultural activities [5,[10][11].…”

Section: ■ Introductionmentioning

confidence: 99%

“…Cyanide may also accumulate in body cells by binding with metalloproteins or enzymes such as catalyses or cytochrome c oxidase [8][9][10]. The most important sources of cyanide pollution in the surface water is through mining operations and industrial and agricultural activities [5,[10][11]. Thus this study focuses on the evaluation of free and total cyanide levels and their concentrations and distribution in water in order to know the sources of contaminants in the aquatic system.…”

Section: ■ Introductionmentioning

confidence: 99%

Assessment of Free and Total Cyanide Levels in the Water Environment of Shatt Al-Arab

Abdulnabi

2020

Indones. J. Chem.

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The concentration of free and total cyanide in waters was measured by using the colorimetric method through complex formation with pyridine-barbituric acid at the wavelength of 578 nm. Ten stations were selected from water surfaces in the south of Iraq. The samples were distributed among two stations, one was on Euphrates River and the other was on Tigris River (before their confluence and formatting of Shatt Al-Arab) and selected seven stations along Shatt Al-Arab River. All the samples were collected from surface water at depth of 10–15 cm and their pH was adjusted to 12 by using sodium hydroxide. The results showed the highest concentration of free cyanide (0.254 mg/L) in station W7 and the lowest concentration in stations W2, W9 and W10, while the highest and lowest concentration of total cyanide (9.962, 0.207 mg/L) were recorded in station W7 and W1 respectively. The standard deviation of all sites (n = 3) of free and total cyanide was calculated and showed 0.007–0.048 and 0.001–0.042 ranges respectively. Furthermore, some of the physico-chemical properties of water were recorded in these stations.

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<b>DETERMINATION OF FREE CYANIDE AND TOTAL CYANIDE CONCENTRATIONS IN SURFACE AND UNDERGROUND WATERS IN BOGOSO AND ITS SURROUNDING AREAS IN GHANA</b>

Cited by 13 publications

References 7 publications

Heavy metal and proximate composition associated with the composting of cassava (Manihot esculenta) peels used in the cultivation of mushrooms in Ghana

Heavy metal and proximate composition associated with the composting of cassava (Manihot esculenta) peels used in the cultivation of mushrooms in Ghana

Human health risk assessment of cyanide levels in water and tuber crops from Kenyasi, a mining community in the Brong Ahafo Region of Ghana

Assessment of Free and Total Cyanide Levels in the Water Environment of Shatt Al-Arab

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