Romanian bentonite and fly ash characterization and their use in heavy metal “in-situ” immobilization in polluted soilsSăndica Liliana Gherghe, Ildiko Anger, Georgiana Moise and Roxana TruscaE3S Web Conf., 18 (2017) 01022DOI: https://doi.org/10.1051/e3sconf/201712301022