Leaching, Physicochemical or geochemical

• Ruggieri, F., Saavedra, J., Fernandez-Turiel, J. L., Gimeno, D., Garcia-Valles, M., (2010), Environmental geochemistry of ancient volcanic ashes, Journal of Hazardous Materials, 183(1-3), 353-365, 10.1016/j.jhazmat.2010.07.032