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October 11 2019

sciencedomaininternational

Determination of Some Heavy Metals in Soils and Vegetables Samples from Kericho West Sub-county, Kenya

The present study was carried out to investigated the presence of heavy metals (essential and non- essential); Pb, Fe, Cu, Mn and Cd in soils and vegetables such as Brassica oleracea, Brassica oleracea Acephala and Amaranthus palmeri. These soils and vegetables were collected randomly from local farms in Kericho West Sub-County. The samples were analysed for heavy metal by Inductively Coupled Plasma Emission Spectrophotometer (ICPE 9000) to determine the levels of the heavy metals. The mean concentrations of the heavy metals ranged in vegetables:- Manganese (86.33-113.00 mg/kg), Copper (15.67-36.00 mg/kg), Iron (319.33-977.67 mg/kg), Cadmium (10.33-29.00 mg/kg) and Lead (31.67-53.67 mg/kg) as well as in the soils; Mn (172.33-201.00 mg/kg), Cu (1.33-3.33 mg/kg), Fe (63.67-98.00 mg/kg), Cd (3.67-5.33 mg/kg) and Pb (5.00-5.67 mg/kg). The data obtained was analysed by using SPSS version 20.0 for descriptive statistics and one- way ANOVA. From the analysis of heavy metals in vegetables, from Sosiot the concentration of Manganese and copper were significantly different at p-value < 0.05, while Iron, Cadmium, Lead and Manganese were not significantly different at p-value > 0.05; from Kabianga Division, Manganese and Iron were significantly different at p-value < 0.05. Copper, Lead and Cadmium were not significantly different at p-value > 0.05; from Kiptere Division, Manganese, Iron and Copper had no significant difference at p-value < 0.05. Cadmium and lead were significantly different at p-value > 0.05. Manganese had the lowest transfer factor between 0.42 and 1.15. The highest ratios were observed from copper ranging from 15.67 to 36.00 in all vegetables.

Please read full article : - www.journalcsij.com

October 10 2019

sciencedomaininternational

Validation of Efficiency Method for Heavy Metals Determination in Kola Nuts (Cola nitida Schott & Endl.) from Côte d’Ivoire

Aims: The current study targets the achievement of a reliable process for the determination of heavy metal contents in kola nuts, namely cadmium, mercury, and lead, for better appreciation of the risks incurred from the consumption of such food products.

Study Design: kola nuts collected from different stakeholders (planters, collectors, stores and centers) were analyzed after the validation of the proposed analytical method.

Place and Duration of Study: Central Laboratory for Food Hygiene and Agro-Industry, LANADA in Abidjan, Côte d’Ivoire, running 2018.

Methodology: Two references were used for the validation of the analytical method, namely the French standard NF V 03-110 and the European directive 2001/22/EC. The assays were achieved with an flame Atomic Absorption Spectrophotometer (AAS). The heavy metal contents of some samples collected from different sampling place were then determined

Results: From the data, a significant regression chart was recorded for the heavy metals detection graphs, with significant correlation coefficients (R²˃ 0.99). The linearity domain was validated between 0.5 μg/L and 1.5 μg/L for cadmium, 15 μg/L and 45 μg/L for lead and from 10 μg/L to 100 μg/L for mercury. In addition, the LOD were 0.03 μg/L, 1.85 μg/L and 2.92 μg/L, while the LOQ were 0.07 μg/L, 6.52 μg/L and 3.32 μg/L for cadmium, lead and mercury, respectively. The relative standard deviations of the repeatability and reproducibility assays are below 4%, whereas standard additions of heavy metals are fully recovered, with percentages close to 100%. Contents of cadmium, lead and mercury in kola nuts are respectively valued at 22.97±9.01 μg/kg, 1065.57±613.76 μg/kg and 33.88±31.58 μg/kg from the farmers and 24.99±7.79 μg/kg, 296.51±98.18 μg/kg and 39.74±34.66 μg/kg from the storage centres.

Conclusion: This analytical method could help in ensuring effective sanitary control at different critical points of kola nut distribution channel for promoting a good management of the toxicity concerns in such products.

Please read full article
: - www.journalajarr.com

September 30 2019

sciencedomaininternational

Chemical Properties of Soil Influence by Sewage Water Irrigation of Different District of Haryana

The present study deals with the difference of chemical properties between sewage and tube well water irrigated soils. Samples were collected from sewage and tube well water irrigated soil of various site like Kaithal, Narwana and Jind district of Haryana state where these waters are directly used for irrigating the crops. Soil samples (0-15 and 15-30 cm) were also collected from fields irrigated with these waters and from nearby fields irrigated with non-sewage waters to determine the changes in soil chemical properties due to sewage irrigation. Total Zn, Cu, Mn, Fe, Cd, Pb, Co, and Cr along with nitrogen, phosphorus and potassium were estimated form the samples. The mean value of N (200.50 kg ha-1) was found highest in the soils irrigated with sewage water of Kaithal. The mean value of P (35.85 kg ha-1) and K (236.40 kg ha-1) was found highest in the soils irrigated with sewage water of Jind. The mean value of K (236.40 kg ha-1) was found highest in the soils irrigated with sewage water of Jind. The mean value of Zn (4.43 mg kg-1), Cu (3.33 mg kg-1) and Fe (19.43 mg kg-1) was found highest in the soils irrigated with sewage water of Jind. The mean value of Mn (15.13 mg kg-1) was found highest in the soils irrigated with sewage water of Kaithal. The DTPA extractable heavy metals like Cd, Pb and Co were found higher in the soils irrigated with sewage water as compared to soils irrigated with non-sewage water. The value of Cr content was found nil all the soils samples collected from different cities from sewage and non-sewage water irrigated sites.

Please read full article : -  www.journalijpss.com

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