Assessment of heavy metal contamination of rice grains (<i>Oryza sativa</i>) and soil from Ada field, Enugu, Nigeria: Estimating the human healtrisk

Ihedioha, Janefrances Ngozi; Ujam, Oguejiofo T.; Nwuche, Charles O.; Ekere, Nwachukwu Romanus; Chime, Charles C.

doi:10.1080/10807039.2016.1217390

Cited by 60 publications

(34 citation statements)

References 37 publications

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“…The mean concentration of the PTEs were in the following order Fe>Mn>Zn>Cd>Cr>Pb>Cu>Ni>Hg. The trend of these PTEs recorded in this study was similar to (Mn>Zn>Cr>Pb>Ni>Cd) reported in Ada rice fields in Enugu, Nigeria [18]. The PTEs concentrations were compared with some Nigerian and international standards.…”

Section: Discussionsupporting

confidence: 82%

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Human health risk assessment of potential toxic elements in paddy soil and rice (Oryza sativa) from Ugbawka fields, Enugu, Nigeria

et al. 2019

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The potential toxic elements (Cu, Zn, Pb, Ni, Fe, Cr, Cd, Mn and Hg) were accumulated from rice grains and soil from an Ugbawka farm, Enugu State, Nigeria, which were determined to evaluate the potential health risk to rice consumers. The mean levels of metals found in soil (mg/kg) were as follows: Ni (0.57±0.24), Pb (2.44±0.17), Zn (3.35±2.05), Cu (0.71±0.33), Mn (37.72±10.97), Fe (13 856.6±31.43), Cr (2.51±0.98), Cd (0.51±1.36), and Hg (0.02±0.38); however metals found in rice grains (mg/ kg) were: Ni (0.81±0.72), Pb (0.94±0.70), Zn (8.22±2.97), Cu (0.59±0.42), Mn (13.30±4.56), Fe (13.28±0.73), Cr (15.00±10.00), Cd (0.36±0.07), and Hg (0.002±0.23). A small percentage (2.5%) of the soil samples were above the Chinese Maximum Allowable Concentration for cadmium in soil while cadmium and lead levels in the rice grains were above WHO permissible limit. Pearson’s correlations showed significant correlations amongst some metal pairs in soil and grains showing similarity in origin. The estimated daily intake of Pb was higher than the safety levels given by JECFA. Hazard Quotient for Pb and Total Hazard Index of all the metals were above one. This indicates possible potential health risk and adverse effect resulting from consumption of rice from Ugbawka farm.

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Section: Discussionsupporting

confidence: 82%

“…The Ugbawka rice field is the second largest rice field in Enugu State after Ada rice field in Adani Enugu State. Ada rice field has been studied by Ihedioha et al [18].…”

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confidence: 99%

Human health risk assessment of potential toxic elements in paddy soil and rice (Oryza sativa) from Ugbawka fields, Enugu, Nigeria

et al. 2019

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“…Accumulation of high concentration of heavy metal in soil will caused phytotoxicity in plants (Alfaraas et al, 2016). Subsequently threaten human health through consumption of food grown in land that contain high concentration of trace elements (Ihedioha et al, 2016). Heavy metals are non-biodegradable and will continue to accumulate in agriculture soil if not decontaminated.…”

Section: Introductionmentioning

confidence: 99%

Trace Elements Distribution in Heirloom Paddy Pandasan Cultivated Under Field Conditions of Dry and Wet Soil

Hamdan¹,

ROSLAN²,

Azman³

et al. 2019

AGR

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Trace elements phytoavailability depends on the physical and chemical propertiesof soil. At the Crocker range of West Coast Sabah, Malaysia, the Pandasan paddyvariety can be cultivated as flooded rice paddies or upland rice on acidic soil.Pandasan paddy samples were collected in Kiulu subdistrict from traditionalfarmer at two different locations. Available sources of trace elements were fromweathering, fertilizers and pesticides. Soil and plant samples were collected aftertwo months of seed sowing and during harvest season which was five months oldfor heavy metal analysis by inductively coupled plasma optical emissionspectrometry (ICP-OES). Translocation factor of arsenic from root to grainindicated this trace element was very mobile in Pandasan paddy cultivated at drysoil compared to wet soil followed by zinc. Although, cadmium was not detected inpaddy cultivated at flooded field for both, soil and plant, cadmium was detected insoil and plant roots cultivated in dry condition. Enrichment factor results suggestedthat Pandasan plant cultivated on dry soil was only a good bioindicator for leadand zinc. Pandasan grain was rich with iron followed by zinc. Selected heavymetals accumulation in Pandasan grain cultivated in flooded field did not exceededthe permissible limit of Malaysia Food Regulation 1985. However arsenic andplumbum concentration in Pandasan grain harvested from dry soil exceeded thepermissible limit of Malaysia Food Regulation 1985. Health risk of heavy metalstoxicity can be reduced if Pandasan paddy is cultivated in flooded field comparedto dry soil.

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“…Lead had also become an emerging concern posing health hazards in rice consumption in different regions of the world. In previous literature, lead concentration in rice grain had exceeded the permissible statutory standard guidelines (Ihedioha et al, 2016;Rahimi et al, 2017;Hamdan et al, 2018). A non-essential element for plant health, phytotoxicity of lead affect plant root growth that can reduce rice grain yield subsequently affect food security (Fahr et al, 2013).…”

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“…Decades of fertilizers and herbicides usage had elevated heavy metal soil bioavailability in the paddy environmental background. This is one of the main contributions to heavy metal toxicity in rice that resulted in a high accumulation of nonessential heavy metals in rice grain and not because of heavy metals mobility efficiency in paddy plants (Ihedioha et al, 2016). Upland paddy landraces are useful phytoextraction candidates as it can also be useful not only for upland paddy cultivation field but other food crop drylands.…”

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confidence: 99%

Distribution of Selected Heavy Metals Bioaccumulation in Various Parts of Indigenous Rice (Bokilong, Ponsulak and Taragang) in North Borneo

Hamdan

Azman

Musa

et al. 2020

BJRST

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The prospect of three native upland paddy landraces known as Bokilong, Ponsulak and Taragang as heavy metals accumulator for phytoremediation was determined. Bioaccumulation of heavy metals (As, Cd, Cr, Cu, Fe, Pb, and Zn) in various parts of paddy plants collected from Kiulu valley, North Borneo in the natural conditions during the vegetative phase and harvest season were analysed by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES). All selected heavy metals were traced in soil samples of all three paddy landraces rhizosphere where the most available heavy metals were Fe followed by Zn. Heavy metals bioavailability in soil seemed to be influenced by the local climate of the cultivation field. Bokilong landrace is an accumulator of As, Cd, Cu, Pb and Zn. Ponsulak paddy can help clean up the soil by phytoextraction of As, Cr, Cu, Fe and Zn. Taragang paddy has a prospect in phytoextraction of Cd and Pb to remediate excess amount of this element in the soil. Different heavy metals concentration trends were accumulated in these three paddy landraces in grain indicated different nutritional values. Heavy metal uptake characteristic differs between upland paddy landraces and there was also environmental influence affecting the mobility rate of these elements in paddy plant depending on the element type and paddy genotype.

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Assessment of heavy metal contamination of rice grains (Oryza sativa) and soil from Ada field, Enugu, Nigeria: Estimating the human healtrisk

Cited by 60 publications

References 37 publications

Human health risk assessment of potential toxic elements in paddy soil and rice (Oryza sativa) from Ugbawka fields, Enugu, Nigeria

Human health risk assessment of potential toxic elements in paddy soil and rice (Oryza sativa) from Ugbawka fields, Enugu, Nigeria

Trace Elements Distribution in Heirloom Paddy Pandasan Cultivated Under Field Conditions of Dry and Wet Soil

Distribution of Selected Heavy Metals Bioaccumulation in Various Parts of Indigenous Rice (Bokilong, Ponsulak and Taragang) in North Borneo

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