Effects of Heavy Metals on Agronomic Attributes of Some Selected Cereal Crops (Zea mays and Sorghum bicolor)

Ameh, G. I.; Nwamba, Helen Ogochukwu; Nwani, Christopher Didigwu; Ofordile, E. C.

doi:10.9734/jalsi/2020/v23i930184

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…The samples in beakers were placed on a digital laboratory heating mantle under fume cupboard and heated at100 o C until the dried leaf samples completely digest. Each digest was allowed to cool and diluted with 50 ml of distilled deionized water [7]. They were filtered into 100 ml volumetric flask using Whatman filter paper (125 mm).…”

Section: Sample Digestionmentioning

confidence: 99%

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Concentrations of Trace Metals in Three Leafy Vegetables (Telfairia occidentalis, Amaranthus viridis and Pterocarpus erinaceus) during the Dry Season in Enugu, Nigeria

Onah

Ameh

Nwani

et al. 2021

JALSI

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Aims: To investigate the trace metals, manganese (Mn), Nickel (Ni), chromium (Cr), cobalt (Co), zinc (Zn) and iron (Fe) in vegetable samples (Telfairia occidentalis, Amaranthus viridis and Pterocarpus erinaceus) from three senatorial zones in Enugu state, Nigeria during dry season period. Place of Study: The leaf samples were collected from three senatorial zones (Enugu north, Enugu west and Enugu east) of Enugu State Nigeria. Methodology: The samples were collected fresh in January, February and March. Prior to analysis, each of the collected samples were dried at room temperature, pulverized using a ball mill and stored at room temperature. They were digested using the wet digestion method and individual metals analyzed using atomic absorption spectrophotometer. Results: The results of the findings revealed that the concentrations of trace metals in the plant tissues were in the following decreasing order Fe > Zn > Mn > Cr > Co > Cd. Amaranthus viridis had the highest accumulation of trace metals while P. erinaceus had the least. Enugu East senatorial zone had the highest accumulation of Mn and Co in all the vegetable samples while Enugu West senatorial zone showed the highest accumulation of Ni, Cr, Zn and Fe in all the plant tissues. Enugu north senatorial zone had the least level of trace metals accumulation in the three plant tissues. Manganese contamination could be a result of mining, battery and automobile fume pollution which dissolve into the soil and are absorbed by plants more effectively during dry seasons. Conclusion: To mitigate the unwanted increase of these metals in vegetables during the dry season, it is necessary to strengthen environmental waste disposal laws.

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Section: Sample Digestionmentioning

confidence: 99%

“…The digests were used for metal determination. The wet digesting of the leaf sample was carried out in the PRODA laboratory, Enugu, Nigeria [7].…”

Section: Sample Digestionmentioning

confidence: 99%

Concentrations of Trace Metals in Three Leafy Vegetables (Telfairia occidentalis, Amaranthus viridis and Pterocarpus erinaceus) during the Dry Season in Enugu, Nigeria

Onah

Ameh

Nwani

et al. 2021

JALSI

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Immobilization of Pb, Cd, and Cr in contaminated soil around mining areas using Mg/Al LDH-zeolite and evaluation of maize growth

Nguyen,

Van,

Dang

et al. 2024

Environ. Res. Commun.

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This study conducted simultaneous adsorption of Pb, Cd, and Cr ions using Mg/Al LDH-zeolite on contaminated soils from lead-zinc and tin mining areas. The optimal conditions were a 3% adsorbent-to-soil ratio, a 30-day incubation period, and 70% soil moisture. Characterization of the materials revealed that Mg/Al LDH-zeolite has superior physicochemical properties to natural zeolite, with a higher surface area and better adsorption capacity. Results indicated significant reductions in exchangeable heavy metal content: in lead-zinc mining area soil, exchangeable Pb decreased from 139.79 mg/kg to 10.95 mg/kg, Cd from 1.518 mg/kg to 0.533 mg/kg, and Cr from 2.636 mg/kg to 0.461 mg/kg using Mg/Al LDH-zeolite. In tin mining area soil, exchangeable Pb decreased from 583.97 mg/kg to 48.22 mg/kg, Cd from 0.498 mg/kg to 0.122 mg/kg, and Cr from 106.095 mg/kg to 38.038 mg/kg. Maize cultivation on post-adsorption soil showed improved growth performance, with plants exhibiting increased height and ear and reduced heavy metal accumulation in roots, shoots, and grains. Pb, Cd, and Cr concentrations in maize roots decreased significantly, with Pb reducing to 0.113 mg/kg in the lead-zinc area and 0.203 mg/kg in the tin area, Cd reducing to 0.061 mg/kg and 0.037 mg/kg, respectively, and Cr reducing to 0.036 mg/kg and 0.243 mg/kg respectively. Mg/Al LDH-zeolite consistently demonstrated higher efficiency in reducing the bioavailability and translocation of heavy metals in maize tissues, confirming its potential as an effective adsorbent for soil remediation. Key mechanisms, including adsorption, surface complexation, ion exchange, precipitation, and structural incorporation, reduce metal mobility and bioavailability.

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Effects of Heavy Metals on Agronomic Attributes of Some Selected Cereal Crops (Zea mays and Sorghum bicolor)

Cited by 2 publications

References 6 publications

Concentrations of Trace Metals in Three Leafy Vegetables (Telfairia occidentalis, Amaranthus viridis and Pterocarpus erinaceus) during the Dry Season in Enugu, Nigeria

Concentrations of Trace Metals in Three Leafy Vegetables (Telfairia occidentalis, Amaranthus viridis and Pterocarpus erinaceus) during the Dry Season in Enugu, Nigeria

Immobilization of Pb, Cd, and Cr in contaminated soil around mining areas using Mg/Al LDH-zeolite and evaluation of maize growth

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