The Accumulation Risk of Heavy Metals in Vegetables which Grown in Contaminated Soil

Abstract

The present study has been carried out to estimate heavy metals mobility, bioconcentration and transfer from polluted soil to roots tissues and from roots tissues to aerial parts using bioconcentration factor and translocation factor. Soil samples and the biomass of the eight vegetable species have been collected during summer season, 2019 from four different sites in Wadi Al-Arg, Taif Governorate, KSA. In general, heavy metals content of soil samples in site III and IV have recorded elevated values compared with those of site I and II. The soil from site IV has shown the highest concentration of Mn, Ni, Cr, Pb, Cu, and Cd amounted 31.63, 14.05, 13.56, 22.79, 31.02 and 2.98 mg/kg dry soil respectively, while the soil from site III has shown the highest concentration of Zn. The data referred to the fact that Mentha longifolia, Cucumis sativus, Capsicum annuum, Lactuca sativa Cucurbita pepo, and Anethum graveolens that grown in sites of investigation could be recognized as suitable for human consumption. These six vegetables could accumulate the measured heavy metals in their tissues with acceptable quantities, less than the permissible levels of Food and Agriculture Organization of the United Nations (FAO). Otherwise, heavy metal concentrations in Solanum lycopersicum and Solanum melongena have been found to be higher than permissible limits of FAO. Both plants also have shown elevated bioconcentration factors values for most of measured heavy metals.

Synthesis, Characterization and Properties of Trimethylolpropane Triesters from Coconut (Cocos nucifera) Methyl Esters

“…Table 2 displays the values of the crude oil's characteristics. The physical-chemical characteristics of unrefined coconut oils were comparable to the values recommended [18][19][20][21][22] for rubber and linseed oils. To avoid excessive oil saponification, the FFA level in the oil must be reduced to 1% or less via esterification.…”

التقديرالمتزامن للرصاص والكادميوم في النماذج البيئية باستخدام الزنك - ثنائي إيثيل ثيوكاربامات

“…For this reason, it is important to find simple, rapid and sensitive Several analytical methods were already used or developed for the quantitative measurement of heavy metals. These methods include: ultraviolet-visible spectrophotometer 13 , atomic fluorescence spectrometry 14 , flame atomic absorption spectrometry 15 , inductively coupled plasma mass spectrometry 16 and X-ray fluorescence technique 17 . Some of these techniques are still unavailable in most laboratories due to its high cost of the instruments.…”

Heavy Metals Concentration in Commercial Rice Available at Erbil City Markets, Iraq and Soaking Effects

“…Due to its significant potential damage to the environment and public health, toxic heavy metals are one of the most significant hazardous chemicals and have frequently been mentioned as a potential pollutant in rice. International attention has been focused on heavy metal contamination in agricultural soil during the past few decades 2 because they tend to accumulate in their tissues in quantities according to the vegetation types 3 . There are several sources of heavy metal contamination in agricultural areas in Iraq, including industrial activities such as metal smelting and power plants, which can release heavy metals into the environment through emissions, spills, and waste disposal practices 4,5 .…”