Peri-Domestic Ecology of Dry-Season Populations of Aedes ( Stegomyia ) Mosquitoes 1 in Uyo, Cross River State, Nigeria

1981 ◽  
Vol 10 (5) ◽  
pp. 592-599 ◽  
Author(s):  
Moses O. E. Iwuala
Keyword(s):  
Dry Season ◽  
Cross River ◽  
Cross River State

scholarly journals Cadmium, Cobalt, Lead and Zinc Levels in Soil and Edible Vegetables in Yala Urban Area of Cross River State, Nigeria

2020 ◽  
Vol 24 (5) ◽  
pp. 835-838
Author(s):  
M.A. Akpe ◽  
P.U. Ubua ◽  
I.B. Onyebuenyi
Keyword(s):  
Urban Area ◽  
Dry Season ◽  
World Health ◽  
Chemistry Laboratory ◽  
Average Level ◽  
Cross River ◽  
Cross River State ◽  
Flame Atomic Absorption ◽  
Significant Difference ◽  
Dry Seasons

The average level of cadmium (Cd), cobalt (Co), lead (Pb) and zinc (Zn) in the soil and edible vegetables samples collected randomly in Yala Urban Area of Cross River State was determined using flame Atomic Absorption Spectrometer. The samples were digested and analyzed for the metals level or concentration in Chemistry Laboratory, University of Calabar. The eight vegetables selected for the study were Amaranthus spp., Corchorusolitorius, Murraya koenigii, Ocimum grattissimum, Solanum melongena, Talinum triangulare, Telferia occidentalis and Vernonia amygdalina. The results indicated that the average level of the metals in the soil in mgkg-1 ranged from (0.005-0.021) and (0.004-0.019) in rainy and dry seasons respectively for Cadmium, (0.162- 0.475) and (0.163- 0.472) in rainy and dry season respectively for Cobalt, and (0.434-1.030) and (0.432-1.027) in rainy and dry season respectively for Zinc. Also, the average level of the metals accumulated by the vegetables in mgkg-1 ranged from (0.002-0.009) and (0.001- 0.007) in rainy and dry season respectively for Cadmium, (0.050-0.198) and (0.048-0.195) in rainy and dry season respectively for Cobalt, and (0.158-0.383) and (0.156-0.380) in rainy and dry season respectively for Zinc. The level of Lead in the soil or vegetables was not detected. The average level of metals accumulated by the vegetables and that present in the soil was in the order: Zinc > Cobalt > Cadmium > Lead. These results revealed that there is no significant difference between the level of metals in the soil or that accumulated by the vegetables in rainy and dry seasons of the year. Also the level of metals accumulated by most of the vegetables was directly proportional to the amount present in the soil where they are planted. The Target Hazard Quotients of these metals was less than 1. These results imply that the concentration of Cadmium, Cobalt, Zinc and Lead in the soil and vegetables were still low and within the permissible limits of World Health Organization. Thus, the consumption of the vegetables in the area may not pose any health risk for now. Keywords: Heavy metals, Concentration, Soil, Edible vegetables.

scholarly journals Concentration of Heavy Metals (Cd, Co, Cr, & Fe) in Soil and Edible Vegetables in Obudu Urban Area of Cross River State, Nigeria

2019 ◽  
pp. 1-7
Author(s):  
Akpe, Michael Akomaye ◽  
Ubua, Placcidus Unimuyi
Keyword(s):  
Heavy Metals ◽  
Urban Area ◽  
Solanum Melongena ◽  
Dry Season ◽  
Cross River ◽  
Cross River State ◽  
Significant Difference ◽  
Dry Seasons ◽  
The Mean ◽  
Mean Concentration

The soil and edible vegetable samples were collected from Obudu Urban Area of Cross River State and were digested and analyzed for the Cd, Co, Cr, and Fe (heavy metals) concentration using Atomic Absorption Spectrometer (AAS) in the University of Calabar Laboratory. The eight vegetables considered for the study were Amaranthus spp., Corchorus olitorius, Murraya koenigii, Ocimum grattissimum, Solanum melongena, Talinum triangulare, Telferia occidentalis and Vernonia amygdalina. The results showed that the mean concentration of the metal in the soil in mgkg-1 ranged from (0.004-0.0048) and (0.005-0.046) in rainy and dry seasons respectively for Cd, (0.004-0.025) and (0.006-0.016) in rainy and dry season respectively for Cr, and (0.112-0.173) and (0.116-0.151) in rainy and dry season respectively for Fe. The concentration of Co was not detected in the soil or vegetables. The mean concentration accumulated by the vegetables and that present in the soil was in the order: Fe> Cd> Cr> Co. These results suggest that there is no significant difference between the amount of metals in the soil or that accumulated by the vegetables in rainy and dry seasons of the year. Also the amount of metals accumulated by most of the vegetables was directly proportional to the amount present in the soil where they are planted. The bioaccumulation ratios were all less than 1. These results indicate that the concentration of Cd, Co, Cr, & Fe in the soil and vegetables were still low and within the permissible limits of WHO/FAO. Thus, the consumption of the vegetables in the area may not cause any harm for now.

scholarly journals Health Risk Analysis of Heavy Metals (Cr, Fe, Hg & Ni) in Edible Vegetables in Yala Urban Area of Cross River State, Nigeria

2019 ◽  
pp. 1-7
Author(s):  
Akpe, Michael Akomaye ◽  
Ashishie, Providence Beteluwhobel ◽  
Inezi, Faith Patrick
Keyword(s):  
Heavy Metals ◽  
Health Risk ◽  
Urban Area ◽  
Dry Season ◽  
Cross River ◽  
Cross River State ◽  
Flame Atomic Absorption ◽  
Dry Seasons ◽  
The Mean ◽  
Mean Concentration

Aim: The aim of the study was to determine concentration of heavy metals in the soil and edible vegetables planted consumed Yala Urban Area of Cross River State, Nigeria, ascertained the level of metals contamination and the possible health risk or implication. Sampling: Forty eight (48) soil and edible vegetable samples (6 of each kind of the 8 vegetables) were collected randomly from Yala Urban Area of Cross River State. The eight vegetables considered for the study were Amaranthus spp., Corchorus olitorius, Murraya koenigii, Ocimum grattissimum, Solanum melongena, Talinum triangulare, Telferia occidentalis and Vernonia amygdalina. They were collected between January and March for dry season, and July and September for rainy season of the year.  Methodology: The samples were digested and analyzed for the Cr, Fe, Hg and Ni (heavy metals) concentration using Flame Atomic Absorption Spectrometer (AAS) in the Chemistry Laboratory, University of Calabar. Results: The results showed that the mean concentration of the metals in the soil in mgkg-1 ranged from (0.063 - 0.108) and (0.049 - 0.104) in rainy and dry seasons respectively for Cr, and (0.026 - 0.124) and (0.013 - 0.119) in rainy and dry season respectively for Fe. The mean concentration accumulated by the vegetables ranged from (0.037- 0.063) and (0.029 - 0.066) in rainy and dry season respectively for Cr and (0.012- 0.071) and (0.008- 0.086) in rainy and dry season respectively. Hg and Ni were neither detected in the soil nor in the vegetables. The trend of the metals in both the soil and vegetable was in the order: Cr > Fe> Hg> Ni. The Target Hazard Quotients were all less than 1, indicating no health risk. Conclusion: These results suggest that there is no significant difference between the amount of metals in the soil or that accumulated by the vegetables in rainy and dry seasons of the year. Also the amount of metals accumulated by most of the vegetables was directly proportional to the amount present in the soil where they are planted. These results indicate that the concentration of Cr, Fe, Hg and Ni in the soil and vegetables were still low and within the permissible limits of WHO/FAO. Thus, the consumption of the vegetables in the area may not pose any risk at the moment.

Teachers Characteristics, Related factors and Environmental Education Curriculum Implementation in Secondary Schools in Cross River State, Nigeria

GIS Business ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 136-158
Author(s):  
Eneji Chris-Valentine Ogar ◽  
Petters Janet Sunday ◽  
Onnoghen Usang Nkanu ◽  
Asuquo Edung Etim
Keyword(s):  
Regression Analysis ◽  
Environmental Education ◽  
Secondary Schools ◽  
Classroom Management ◽  
Curriculum Implementation ◽  
Education Curriculum ◽  
Related Factors ◽  
Significance Level ◽  
Cross River ◽  
Cross River State

This study assessed the influence of teacher’s characteristics and other related factors in the implementation of Environmental Education curriculum in secondary schools in Cross River State, Nigeria. Two research designs were used, survey inferential and Expost facto research design. The study is located in the department of Environmental Education, University of Calabar, Nigeria. Two research questions converted into two hypotheses were formulated for the study.  A sample of three hundred (300) respondents were selected using the multistage random sampling technique comprising of twenty five (25) lecturers and two hundred and seventy five (275) postgraduate and final year undergraduate students in the department of Environmental Education, University of Calabar. Data was collected using a structured questionnaire, the instrument administration was done by the researchers and same were collected 100%. Pearson Product Moment Correlation Analysis and regression analysis were used to test the hypotheses at 0.05 significance level and 298 and 290 degrees of freedom respectively. The result shows that teacher’s characteristics do significantly influence Environmental Education curriculum implementation in secondary schools. The regression analysis also shows that 6 factors listed impedes the implementation of Environmental Education curriculum, while four were not significant factors influencing Environmental Education curriculum in secondary schools. It was however recommended that teachers with competence in pedagogic knowledge of Environmental Education with classroom management skill should be employed to drive the process, while arrangement should be put in place to make Environmental Education a subject for students to offer and write in final senior secondary school examination among other.

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