Study on the Effect of Cu (II) and Zn (II) on the Accumulation of Pb (II) from Soil to the Biomass of Vegetable

Le Thi Thanh Tran,Le Van Luan,Tran Quang Hieu,Le Van Tan,Vera Popovic

doi:10.1155/2021/6687566

Abstract

Among soil pollutants, lead (Pb) is one of the toxic metal pollutants widely used in many industrial processes and occurs as a contaminant in environment. In this study, a field experiment was carried out to investigate the accumulation of lead from soil contaminated by this metal ion on the biomass of some vegetables, including spinach, lettuce, carrots, and potatoes. The results showed that lead was cumulative metal. Besides, the level of lead accumulation in soil of the studied vegetables decreased in the order of tubers of carrots, tubers of potato, spinach root, lettuce root, stems and leaves of spinach, stem and leaves of carrot, stems and leaves of potato, and stem and leaves of lettuce, respectively. Our investigations demonstrate the effect of copper and zinc micronutrient elements which play an important role in the growth and development of plants, on the accumulation of lead from contaminated soil of the studied vegetables. The obtained results showed that high concentration of copper and zinc in soil cause competition with lead in the process of absorption and accumulation in the plant. Specifically, copper and zinc showed the inhibition effect on the uptake and accumulation of lead by these plants.

Highlights

Heavy metals are toxic because they tend to accumulate in crops and eventually enter the human body through the food chain, posing a threat to human health
E results obtained from the research model of accumulation of lead from soil to plants showed that lead was a cumulative metal
E total amount of lead accumulated in the biomass of the studied vegetables is considered as the most important parameter to evaluate the potential of accumulation of this metal. e results shown in these tables and the figure demonstrated that all kinds of studied vegetables cultivated on contaminated soil by lead can accumulate this heavy metal

Summary

Introduction

Heavy metals are toxic because they tend to accumulate in crops and eventually enter the human body through the food chain, posing a threat to human health. The results of such work will allow predicting the level of metal accumulation in plants from the analysis report of metal content in the cultivated environments, without analyzing their content in the plants themselves. Erefore, to propose possible solutions to the problem of metal contamination in the soil, water, and their spread in plants, it is necessary to get results allowing the assessment of competitive absorption among the metals. E results of such a study combined with the results of the analysis of metal content in cultivated environments will allow predicting whether competitive absorption among metals happens or not, which metal is inhibited (i.e., inconsiderable metal accumulation), and which metal is absorbingly stimulated (i.e., a need for handling). Us, in farming, copper and zinc often are added in soil by using micronutrient fertilizers; since it is observed that micronutrients could have different influences on plants, the objective of this research was to estimate the effect of copper and zinc micronutrient elements on lead amount in soil and plants

Experimental

Results and Discussion

Background