Evaluation of Heavy Metal Contamination in Green Leafy Vegetables Grown in Allahabad

Background: Heavy metal contamination and related risks for the environment and human health are matters of increasing concern. Methods: The levels of 4 heavy metals (Cr, Cd, Pb, and As) were evaluated in 2 water types (surface and well), 4 types of seafood (tiger shrimp, stuffed snail, snake-head fish, and catfish), and 27 types of vegetables (12 leafy vegetables, 4 pea plants, 4 tuber vegetables, and 7 herbs) that are commonly consumed in northern coastal communes located in Vietnam. Atomic absorption spectrometry was employed for quantification. Results: The mean concentrations of heavy metals detected in water, seafood, and vegetable samples exceeded the national permitted standards and World Health Organization (WHO) recommendation values by at least 2-fold, 2.5-fold, and 5-fold for surface water, vegetables, and well water, respectively. The concentrations of all 4 heavy metals detected in seafood samples were higher than the standards. The levels of heavy metals decreased with increasing distance between the sample collection point and the pollution source. Conclusions: This is the first report of heavy metal contamination of common sources of food and water in the northern coastal area of Vietnam. Significantly, the concentrations of heavy metals detected in study samples exceeded the regulatory limits. These results underscore the importance of continued monitoring and the development of intervention measures to ensure that the quality of food and water meets established standards and protects the health of the local population.

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Investigating the contents of Heavy Metals in Edible Portion of Leafy Vegetables Grown Within Lagos State University, Ojo Campus

JOURNAL OF RESEARCH AND REVIEW IN SCIENCE ◽

10.36108/jrrslasu/0202.70.0130 ◽

2020 ◽

Vol 7 (1) ◽

Author(s):

Abosede Adu ◽

Oluwatoyin Aderinola ◽

Gabriel Mekuleyi

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Metal Contamination ◽

Heavy Metal Contamination ◽

Leafy Vegetables ◽

State University ◽

Edible Portion ◽

Ocimum Gratissimum ◽

Lagos State ◽

Celosia Argentea

Introduction: Edible plants are the major source of diet, and their contamination with toxic metals mayresult in catastrophic health hazards. This study was conducted to analyse the heavy metal levels in Amanranthus viridis, Celosia argentea, and Ocimum gratissimum grown in selected farmlands around Lagos State University using Atomic Absorption Spectrometers (AAS). Methods: Dry ashing method was used to destroy the organic matter to determine the content of the heavy metals. The level of the following heavy metals (Lead (Pb), Copper (Cu), Iron (Fe) and Chromium (Cr).) were determined in the soil and edible portion of the vegetables. Results: The results showed that the mean concentration of heavy metals dry weight are: Cu(0.072± 0.014 mg/kg), Fe (0.761± 0.140 mg/kg) Pb(0.006± 0.001mg/kg) and Cr(0.008± 0.002 mg/kg) for Amaranthus viridis,0.004± 0.002mg/kg- Pb, 0.113± 0.158mg/kg- Fe, 0.032± 0.003mg/kg- Cu in Celocia argentea, 0.025± 0.004 mg/kg- Pb, 0.111±0.002 mg/kg Fe in Ocimum gratissimum were recorded in Sport center (site A). The value of heavy metal contamination obtained from School gate (site B) ranged from 0.072± 0.006 mg/kg- Pb to 0.742± 0.066 mg/kg- Fe in Amaranthus viridis, 0.007± 0.0 mg/kg- Pb to 0.450± 0.111 mg/kg- Fe in Celosia argentea, 0.030± 0.005mg/kg- Fe to 0.051± 0.044 mg/kg- Pb in Ocimum gratissimum. The value of heavy metal contamination obtained from PPL (site C) ranged from 0.037± 0.004 mg/kg -Cu to 0.559± 0.080 mg/kg- Fe in Amaranthus viridis, 0.011± 0.001 mg/kg Cr to 0.474± 0.151 mg/kg Fe in Celosia argentea, 0.007± 0.008 mg/kg Pb to 0.048± 0.017mg/kg Fe in Ocimum gratissimum. Conclusion:The levels of heavy metals determined in the analyzed Vegetable samples were found to be below the permissible limits set by WHO; hence they are safe for human consumption.

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Comparative analysis of heavy metal contamination in some common tubers and vegetables of Kerala

Indian Journal of Agricultural Research ◽

10.18805/ijare.a-5142 ◽

2019 ◽

Author(s):

Silvy Mathew ◽

P. T. Teenamol

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Comparative Analysis ◽

Metal Contamination ◽

Heavy Metal Contamination ◽

Leafy Vegetables ◽

Cadmium Content ◽

Human Beings ◽

Potential Health ◽

Potential Health Risk

Leafy vegetables and tubers contaminated by heavy metals will cause potential health risk to human beings. An analysis was carried out to study the heavy metal contamination in tubers and leafy vegetables at Kottayam district, Kerala. The results indicated that higher levels of lead were recorded in all of the samples analyzed when compared to the WHO permissible limits (0.1 mg/kg) for tubers and leafy vegetables, except in Colocasia esculenta (L.) Schott., collected from Erattupetta market. Cadmium content was higher in both the tubers and leafy vegetables collected from Changanacherry market. Therefore, regular assessment of the accumulation of heavy metals in leafy vegetables and tubers is the need of the era.

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