Assessing the chelating ability of Aerva  lanata: adsorption of chromium from tannery effluent and its toxicity measurement

Poonkuzhali, K.; Manivannan, M.; Palvannan, T.

The chelating ability of aqueous leaf extract of Aerva lanata was assessed in vitro. The aqueous leaf extract showed a dose dependent decrease in chelating ability using FeCl2. The highest chelating ability of aqueous leaf extract was observed at <$E2~cdot~10 sup -5> g/mL (<$E100~symbol С~0,00>). The antioxidant activity of the aqueous leaf extract ranged from 42,13 % to 88,66 %. At <$E2~cdot~10 sup -5> g/mL concentration, a strong positive significant correlation was observed between chelating ability and total phenolics concentration (R = 0,94; P = 0,001). The chelating ability of aqueous leaf extract (<$E2~cdot~10 sup -5> g/mL) showed a high positive significant correlation with antioxidant activity (R = 0,78; P = 0,001). Aqueous leaf extract removed the chromium from tannery effluent by 43 mg/g. Allium сера toxicity test was performed on tannery effluent treated with aqueous leaf extract that increased the root length of onion.


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