Phytoremediation potential of Amaranthus hybridus L. (Caryophyllales: Amaranthaceae) on soil amended with brewery effluent

Abstract

Toxicity of heavy metals above the normal threshold constituted a threat to humanity and biodiversity. Phytoremediation has become a novel and emerging technology of cleaning polluted sites through the use of plants. A study was carried out at the screen house located besides the academic building of the Federal University of Technology, Akure, Nigeria, to evaluate the phytoremediation potential of Amaranthus hybridus L. (Caryophyllales: Amaranthaceae) on a brewery effluent. The parameters investigated include chlorophyll content, the concentration of the metals in the plants, Bioconcentration Factor (BCF) and Translocation Factor (TF) was studied. Three different concentrations of brewery effluent were used at 50, 100 and 150 mL/5 kg of soil, respectively. The results of this study under controlled conditions indicate that effluent application increased chlorophyll content, reduced plant height and stem girth. Three heavy metals (iron, cadmium, and chromium) were detected in the shoots and leave of both plants after the experimental period. The translocation factor (less than 1) and bioaccumulation factors (greater than 1) were below the permissible limits hence indicating a possible bio-accumulator for the heavy metals investigated. Brewery effluent reduce the plant height but increase the leaf area of A. hybridus under high concentrations which possibly suggest an adaptive mechanism developed by the plant under stress.

Physio-anatomical modifications and element allocation pattern in Alternanthera tenella Colla. associated with phytoextraction of chromium

“…Due to the accumulation of heavy metals in their biomass, a number of plant species in the Amaranthaceae family have the potential to be used in phytoremediation (Odiyi et al 2019; Rodrigues et al 2017). Alternanthera tenella Colla (Amaranthaceae) is a fast-growing, invasive alien herb widely found in India, especially in polluted areas such as industrial zones.…”

Phytoextraction of toxic elements by Amaranthus Tricolor grown on technogenically polluted soils in open ground conditions

“…Amaranth is rarely used as a phytoremediate. There is information about the study of the accumulating ability of some of its species [11][12][13][14]. The accumulation capacity of Amaranthus hybridus and A. tricolor was shown in relation to three elements: iron, cadmium and chromium [11,13,14].…”

“…There is information about the study of the accumulating ability of some of its species [11][12][13][14]. The accumulation capacity of Amaranthus hybridus and A. tricolor was shown in relation to three elements: iron, cadmium and chromium [11,13,14]. Expanding the list of species and varieties that have the ability to bioaccumulate HMs is fundamental in the development of measures for phytoremediation of soils.…”