Phytoremediation of fluoride with garden ornamentals Nerium oleander, Portulaca oleracea, and Pogonatherum crinitum

Abstract

Nursery grown plants of Nerium oleander, Pogonatherum crinitum, and Portulaca oleracea were observed to remove fluoride up to 92, 80, and 73%, respectively, from NaF solution at the concentration of 10 mg L within 15 days. Concentration range of 10-50 mg L of fluoride revealed a constant decrease of removal from 92 to 51% within 15 days by N. oleander, while the biomass (one to five plants) showed enhancement in removal from 74 to 98% in 10 days. Translocation and bioaccumulation factors calculated after fluoride contents in roots and leaves of N. oleander, P. crinitum, and P. oleracea were 1.85, 1.19, and 1.43, and 9.8, 3.6, and 2.2, respectively. P . oleracea, P. crinitum, and N. oleander showed reductions in chlorophyll contents by 40, 57 and 25 and 8%, carbohydrates by 50, 44, and 16%, and proteins by 38, 53, and 15%, respectively. Activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPX) in the roots of P. oleracea, P. crinitum, and N. oleander were observed to be induced by 400, 383, and 500%; 80, 105, and 424%; and 153, 77, and 71%, respectively, while the leaves showed induction in SOD, CAT, and GPX activities by 550, 315, and 165%; 196, 227, and 243%; and 280, 242, and 184%, respectively. Results endorsed the superiority of N. oleander for fluoride removal over other plant species.

PHYTOREMEDIATION OF FLUORIDE-CONTAMINATED WATER BY Landoltia punctata

“…Among the several determining factors for phytoremediation processes, the screening of plant species is the focus of intense research (Díaz & Pedraza, 2010;Khandare et al, 2017). Plant performance is assessed by removal efficiency, kinetics, tolerance index, growth rate (Sokolova et al, 2019;Yadav et al, 2018), and physiological disturbances that interfere with chlorophyll content, proteins, and enzymes (Karmakar et al, 2016).…”

A review of the performance of woody and herbaceous ornamental plants for phytoremediation in urban areas

“…Nerium oleander (Fig. 3b) resulted able to remove 92% of fluoride from a 10 mg L -1 NaF solution, within 15 days (Khandare et al 2017). Ricinus communis showed a great potential for removing dichlorodiphenyltrichloroethane (DDT) from contaminated soils, with different effectiveness depending on the genotype (Huang et al 2011).…”

“…Capuana tion, within 15 days by 73%; the higher fluoride concentrations showed lower removal rates (Khandare et al 2017). Canna indica was studied in a hydroponic system for testing its ability to remediate triazophos contamination, a harmful pesticide.…”

Short communication Phenol contaminant of Bengawan Solo River and characteristics of Portulaca using flavonoid, saponin, and tannin for phytoremediation purposes

“…The capability of P.oleracea in reducing Cr in the environment would be effective in preventing the environment from the Cr contaminant. Using the presence of secondary metabolism in the plant tissues, it is very promising to use those species to be employed in phytoremediation purposes (Khandare et al 2017).…”