Caracterização anatômica de órgãos vegetativos do mamoeiro

Carneiro, Cláudia Elena; Cruz, Jailson Lopes

doi:10.1590/s0103-84782009005000011

Cited by 4 publications

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References 2 publications

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“…The high concentrations of Zn, Cd, Cr and Pb in Carica papaya leaves may be attributed to its network of fibrous root that offered large surface area at the surface soil (0-15 cm) and beyond the surface soil (16-50 cm) as well as horizontal spread of its roots in soil. The papaya root is predominately a non-axial, fibrous system, composed of one or two 0.5-1.0 m long tap roots, and secondary roots that branch profusely (Marler and Discekici, 1997;Carneiro and Cruz, 2009). The concentration of Zn increased from 1.24±0.06 to 56.02±5.02 mg/kg, which is higher than 22.09 to 45.71 mg/kg in tomato growing on soil amended with applied sewage sludge (Elloumi et al, 2016), 5.96±0.02 to 28.85±0.04 mg/kg in Amaranthus hibridus, Talinum triangulare, Carica papaya, Ipomea batatas and Luffa aegyptiaca at waste dump site (Obasi et al, 2013), 0.02 to 0.40 mg/kg in Zea mays, Hibiscus sabdarifa, Abelmuschus esculentus, Amaranthus dubius and Arachis hypogea at municipal waste dumpsite in Nasarawa State, Nigeria (Opaluwa et al, 2012).…”

Section: Potentially Toxic Element In Food Cropsmentioning

confidence: 99%

Analysis of Soil Quality Status and Accumulation of Potentially Toxic Element in Food Crops Growing at Fecal Sludge Dumpsite in Ubakala, Nigeria

Ogbonna

Okezie

Onyeizu

et al. 2021

Nig. J. Env. Sci. & Tech.

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This study investigated the magnitude of potentially toxic element (PTE) in fecal sludge and the level of contamination of soil and food crops at Ubakala, Abia State, Nigeria. Soil samples were collected in four cardinal points at north (N), south (S), east (E) and west (W) of 1 m, 5 m, 15 m and 30 m from the edge of the fecal sludge dumpsite and standards (2 ppm, 4 ppm and 6 ppm) were prepared from 1000 ppm stock solution of the metals and used to plot the calibration curve with Atomic Absorption Spectrometer. Commonly consumed Carica papaya, Telfairia occidentalis and Manihot esculenta leaf samples were collected and analyzed to measure the concentrations of PTEs such as Cd, Zn Cr, Mn, Pb and Cu. The concentrations of Zn (12.41±0.30 mg/kg), Cd (0.07±0.00 mg/kg), Cr (4.47±0.34 mg/kg), Cu (2.12±0.03 mg/kg), Mn (8.13±0.03 mg/kg) and Pb (0.01±0.00 mg/kg) in dried fecal sludge are below the permitted limits of European Union. Concentrations of PTEs in soil and plants were Zn (13.40±1.20 to 100.80±1.40 and 1.24±0.06 to 56.02±5.02 mg/kg), Cd (0.07±0.01 to 0.92±0.02 and 0.0000±0.000 to 0.085±0.01 mg/kg), Cu (6.27±0.31 to 31.39±1.04 and 0.002±0.001 to 10.80±2.01 mg/kg), Mn (36.00±1.56 to 188.57±2.25 and 0.11±0.00 to 17.21±2.01 mg/kg), Cr (2.40±0.40 to 21.03±1.43 and 0.000±0.00 to 9.60±1.13 mg/kg) and Pb (0.09±0.02 to 0.35±0.03 and <0.00001±0.00 to 0.008±0.00 mg/kg), respectively. Zinc in soil is higher than FAO/WHO permissible limit while Cd in soil is higher than FAO/WHO limit and Dutch criteria for soil. Zinc and Cr in food crops are higher than FAO/WHO permissible limit. Strong positive relationship exist between Zn in soil and food crops (r = 0.616, p<0.05). Based on the findings, it is recommended that the fecal sludge should be treated with lime to precipitate PTE content of sludge and lowering the corresponding environmental risks.

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Section: Potentially Toxic Element In Food Cropsmentioning

confidence: 99%