Novel nano Rosmarinus officinalis phytomass adsorbent for strontium and europium removal from aqueous solution: batch and packet techniques

Phytomass sorbent material (RM) was obtained as a by-product from the process of essential oil extraction. Its phosphoric acid-modified nano-form, N-RM, was used to absorb Sr(II) and Eu(III) from an aqueous solution. The pseudo-second-order is the better fitting model. Isotherm Langmuir and Freundlich models were fitted with a maximum capacity of q m 18.2, 60.4, 11.5, and 13.8 mg/g for Eu/RM, Eu/N-RM, Sr/RM, and Sr/N-RM, respectively. The packet technique promised to be applicable on a large scale for the treatment of contaminated water. Both RM and N-RM are effective eco-friendly adsorbents for the removal of Eu(III) and Sr(II).