Phytotreatment of Sewage Sludge Contaminated by Heavy Metals and Pahs by Co-Planting Sedum Alfredii and Alocasia Marorrhiza. - Qiu, J.R.; Guo, X.F.; Cai, Q.Y.; Liu, W.; Zhang, M.W.; Wei, Z.B.; Wu, Q.-T. (International Journal of Phytoremediation, 2014)