Cyanoremediation of heavy metals (As(<scp>v</scp>), Cd(<scp>ii</scp>), Cr(<scp>vi</scp>), Pb(<scp>ii</scp>)) by live cyanobacteria (<i>Anabaena variabilis</i>, and <i>Synechocystis</i> sp.): an eco-sustainable technology
RSC advances