A toxic element is to be removed from drinking water by adsorption on activated charcoal. At low concentrations, the rate constant for adsorption is $$1.8 \times10^{-5}\ \mathrm{s^{-1}}$$. The time required to reduce the concentration of the toxic element to $$10\%$$ of its initial concentration is

A

$$1.28 \times10^5\ \mathrm s$$

B

$$5.85 \times10^3\ \mathrm s$$

C

$$1.28 \times10^6\ \mathrm s$$

D

cannot be calculated from the given data