digested with 10 mL 0.36 mol L−1 H2SO4 (Gaines andMitchell 1979). B was quantified by spectrometer(model: 720ES, ICP-OES, Agilent Inc., Santa Clara,CA, USA).VitrificationThe vitrification amounts were scored according toIbrahim et al. (2016), shown in Table 1.