Zhang, Jin, Wu, Shuai, Xu, Jialin, Liang, Peng, Wang, Minyan, Naidu, Ravi, Liu, Yanju, Man, Yu Bon, Wong, Ming Hung, Wu, Shengchun. Elsevier; 2021. Comparison of ashing and pyrolysis treatment on cadmium/zinc hyperaccumulator plant: effects on bioavailability and metal speciation in solid residues and risk assessment.