Comparative Study on Bioaccumulation and Translocation of Metals in Bermuda Grass (Cynodon Dactylon) Naturally Growing on Fly Ash Lagoon and Topsoil

Abstract

Maiti et al.: Comparative study on bioaccumulation and translocation of metals inAbstract. Cynodon dactylon (Bermuda grass) is one of the most common naturally colonized creeper grass found on fly ash lagoons and soils in India. Bioavailable metal concentrations in fly ash and topsoil were analyzed by using DTPA as extractant. Bioaccumulation of metals in the root and their translocation to the shoot were estimated for fly ash and compared with topsoil. Bioaccumulation of Zn, Mn, Ni and Cu were found similar for the plants growing on fly ash and topsoil. Different bioaccumulation trends were observed for Pb, Co and Cd, in fly ash and topsoil. In fly ash translocation factors were found >1 for Cd, Mn, Zn and Cu, indicating a higher translocation of these metals in aerial parts, which can easily transfer to the food chain. In topsoil, translocation factor for all the metals (except Cd) was found <1, indicating immobilization of metals in root. The study concluded that Bermuda grass growing on fly ash lagoons can act as a transferring link of heavy metals in the food chain.

Herbaceous plants as heavy metals accumulators in conditions of ash and slag dumps

“…showed that Pb and Cu, Zn concentrations were greater in the roots than the shoots -in this case, TF of these elements was below 1 42 . A higher translocation of heavy metals in aerial parts could be a reason for the easy transfer of these pollutants to the food chain 17 . As the index of TF reflects the transfer and redistribution of heavy metals among different parts of plants 13 , the TF is below 1, indicating that metals are mainly accumulated in the roots and are rarely transported to the shoots.…”

“…Numerous research dedicated to analyzing heavy metal accumulation by herbaceous species 13,15 . There are several studies about the accumulation of heavy metals in fly ash lagoons and fields around coal-fired power stations which are contaminated with fly ash 17,18,19,20 .…”

Accumulation of heavy metals in leaves of tree species on the ash and slag dumps of the Burshtyn Thermal Power Plant

“…The vegetation coverage plays an important role in the accumulation and transportation of HMs [5,6]. Therefore, plants are the most available and useful organisms to evaluate metal contamination [7,8].…”