PHYTOREMEDIATION OF HEAVY METALS CONTAMINATED SOIL USING Brassica juncea (L.) IN BANY EL- HARETH, SANA'A- YEMEN

Abstract

This study was carried out at Bany El-Hareth site north of Sana'a-Yemen to evaluated the ability of Brassica juncea (L.), which has already been recognized as a plant suitable for metal phytoremediation to extract Lead (Pb), Cadmium (Cd), Nickel (Ni), Zinc (Zn), and Copper (Cu) from waste water contaminated soil and investigated the effect of plant parts and contaminated soil on heavy metals accumulation in plant. Indian mustard plant ( B. juncea ) was grown in wastewater contaminated soil. This study showed that Brassica juncea (L.) was able to grow in heavy metals contaminated soils and also able to accumulate extraordinarily high concentrations of some metals such as Pb, Cd, Ni, Zn and Cu in its tissues. The results indicated that contaminated soil content of Pb, Cd, Ni, Zn and Cu decreased 45, 56, 73, 53and 79 % respectively after plant harvest. Plant parts and contaminated soil affected heavy metals accumulation in plant, the highest accumulation 54.0, 24.8 and 42.3 ppm of Pb, Cd and Ni respectively were in plant roots, whereas, the highest accumulation of Zn was 250.6 ppm in shoots and 35.6 ppm of Cu in fruits.

Removal of heavy metals from a contaminated soil using phytoremediation

“…This plant is able to accumulate unusually high concentrations of Zn in their aboveground parts. In the interaction between sol and plant parts it can be notice some significantly difference on Zn accumulation in plant, the highest accumulation of Zn was in the interaction between shoots and contaminated soil, where the lowest accumulation of Zn was in the interaction between roots and control soil [42].…”

“…The higher concentration of Pb in root it is due to deep of roots in soil and roots ability for Pb accumulation. The effect of interaction between soil and plant organs on lead accumulation in Brassica juncea plant show that the highest value was in the interactin between contaminated soil and root part, and the lowest value was in the interaction between uncontaminated soil and shoots [42].…”

“…Brassica juncea (Indian mustard) is one of the most used plants from Brassicaceae family that can remove different heavy metals from contaminated soil [39], [42][43][44][45].…”

“…From the interaction between soil and plant parts it can be seen that the highest value was in the interaction between contaminated soil and fruits, whereas the lowest value was in the interaction between control soil and shoots. May this due to pH of soil and the large biomasses of fruits in Brassica juncea plant [42].…”