Singh, Raj Shekhar (2017) Grasses and legumes facilitate phytoremediation of metalliferoussoils in the vicinity of an abandoned chromite–asbestos mine. J Soils Sediments, 17 (5).
Full text not available from this repository.Abstract
Purpose The present study was carried out in Roro region, Chaibasa, Jharkhand, India, to assess the impact of chro�mite–asbestos mine waste (CMW) on a nearby agroecosystem. The role of metal-accumulating grass–legume association in facilitating phytoremediation was investigated. Materials and methods Soil and plant samples were collected from (i) chromite–asbestos mine waste (CMW) with Cynodon dactylon, Sorghastrum nutans, and Acacia concinna; (ii) con�taminated agricultural soil-1 (CAS1) from a foothill with Cajanus cajan; (iii) contaminated agricultural soil-2 (CAS2) distantly located from the hill, cultivated with Oryza sativa and Zea mays; and (iv) unpolluted control soil (CS). Total metal concentrations were quantified in both soils and plants by digesting the samples using HNO3, HF, HClO4 (5:1:1; v/v/ v), and HNO3 and HClO4 (5:1; v/v), respectively, and ana�lyzed under flame atomic absorption spectrophotometry. Metal grouping and site grouping cluster analysis was execut�ed to group the metals and sampling sites. Translocation factor (TF) and bioconcentration factor (BCF) were calculated to determine the phytoremediation efficiency of grasses and legumes. Results and discussion Results indicate that total metal con�centrations in the CMW were in the order of Cr>Ni>Mn> Cu>Pb>Co>Zn>Cd. High concentrations of Cr (1983 mg kg−1 ) and Ni (1293 mg kg−1 ) with a very strong contamination factor were found in the CAS, which exceeds the soil threshold limits. Further, metal and site grouping clus�ter analysis also revealed that Cr and Ni were closely linked with each other and the CMW was the main source of con�tamination. Among all the metals, Cr and Ni were mainly accumulated in grasses (C. dactylon and S. nutans) and le�gumes (A. concinna and C. cajan) as compared to cereals (Z. mays and O. sativa). The TF of Cr was >1 for grasses. Except for Zn, the BCF for all the metals were <1 in roots and shoots of all the plants and cereals. Conclusions The present study revealed that abandoned CMW is the source of contamination for agriculture lands. Phytoremediation relies on suitable plants with metal�scavenging properties. Grass–legume cover (C. dactylon, S. nutans, A. concinna, and C. cajan) has the ability to accumulate metals and act as a potential barrier for metal transport, which facilitate the phytoremediation of the CMW. Possibilities for enhancing the barrier function of the grass–legume cover need to be explored with other low-cost agronomic amendments and the role of rhizospheric organisms.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Agricultural soil . Bioconcentration factor . Cluster analysis . Contamination factor . Translocation factor |
| Subjects: | Envieronmental Management Group |
| Divisions: | UNSPECIFIED |
| Depositing User: | Mr. B. R. Panduranga |
| Date Deposited: | 31 Aug 2021 08:28 |
| Last Modified: | 31 Aug 2021 08:28 |
| URI: | http://cimfr.csircentral.net/id/eprint/2420 |
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