Synthesized struvite was innovatively applied to removing Cu（II） from aqueous solution. The Cu（II） adsorption behavior and relative mechanisms were studied and analyzed. The maximum Cu（II） adsorption under pH=4....Synthesized struvite was innovatively applied to removing Cu（II） from aqueous solution. The Cu（II） adsorption behavior and relative mechanisms were studied and analyzed. The maximum Cu（II） adsorption under pH=4.0 and 318 K calculated from adsorption thermodynamic analysis was 145.1 mg/g. The sorption kinetics can be favorably described by pseudo-second order model. The activation energy （Ea） of 17.5 kJ/mol suggested that the adsorption process was a chemical adsorption. The calculated thermodynamic parameters indicated that the adsorption was a spontaneous and endothermic one. On the basis of characterization upon struvite before and after adsorption, it was found that the electrostatic attraction and coordination bonding supported the ion sorption on struvite surface, and the transformation of copper ion into copper hydroxide occurred on struvite surface and within its crevices.展开更多
The Mesozoic granitoids in the Dabie Orogen are of particular geological interest as indicators for Mesozoic lithospheric evolution because of their close association with porphyry Mo mineralization.Here,we present a ...The Mesozoic granitoids in the Dabie Orogen are of particular geological interest as indicators for Mesozoic lithospheric evolution because of their close association with porphyry Mo mineralization.Here,we present a study using petrogeochemistry data to constrain the petrogenesis of the Xiaofan granites in the Dabie Mo mineralization belt(DMB),Henan Province,China.Field investigations show that the Xiaofan pluton mainly consists of porphyritic granite.The Xiaofan granites have high SiO2 contents of 74.29 wt%-76.07 wt%(average:75.18 wt%),A1203 contents of 11.66 wt%-12.83 wt%(average:12.13 wt%),and K20 contents of 5.37 wt%-7.90 wt%(average:6.86 wt%)and low MgO(0.06 wt%-0.16 wt%),TiO2(0.09 wt%-0.10 wt%),and P205(0.047 wt%-0.103 wt%)contents.They are enriched in Rb,U,K and Hf but depleted in Ba,Nb,Ta,Sr and Ti.By geochemical and mineralogical features,we propose that the Xiaofan granites belong to A-type type granite and dominantly sourced from the crust.The granites from the Xiaofan Mo deposit may have formed in a post-collision extensional setting.展开更多
基金Project(51674305)supported by the National Natural Science Foundation of ChinaProject(2013WK2007)supported by the Key Project of Science and Technology of Hunan Province,ChinaProject(2015CX001)supported by the Innovation Stimulating Program of Central South University,China
文摘Synthesized struvite was innovatively applied to removing Cu（II） from aqueous solution. The Cu（II） adsorption behavior and relative mechanisms were studied and analyzed. The maximum Cu（II） adsorption under pH=4.0 and 318 K calculated from adsorption thermodynamic analysis was 145.1 mg/g. The sorption kinetics can be favorably described by pseudo-second order model. The activation energy （Ea） of 17.5 kJ/mol suggested that the adsorption process was a chemical adsorption. The calculated thermodynamic parameters indicated that the adsorption was a spontaneous and endothermic one. On the basis of characterization upon struvite before and after adsorption, it was found that the electrostatic attraction and coordination bonding supported the ion sorption on struvite surface, and the transformation of copper ion into copper hydroxide occurred on struvite surface and within its crevices.
基金Project(2017M622596)supported by the Postdoctoral Science Foundation of ChinaProject(2015CX008)supported by the Innovation Driven Project of Central South University,ChinaProject(12120114052201)supported by the Geological Scientific Research Project of Land and Resources of Hunan Province,China
文摘The Mesozoic granitoids in the Dabie Orogen are of particular geological interest as indicators for Mesozoic lithospheric evolution because of their close association with porphyry Mo mineralization.Here,we present a study using petrogeochemistry data to constrain the petrogenesis of the Xiaofan granites in the Dabie Mo mineralization belt(DMB),Henan Province,China.Field investigations show that the Xiaofan pluton mainly consists of porphyritic granite.The Xiaofan granites have high SiO2 contents of 74.29 wt%-76.07 wt%(average:75.18 wt%),A1203 contents of 11.66 wt%-12.83 wt%(average:12.13 wt%),and K20 contents of 5.37 wt%-7.90 wt%(average:6.86 wt%)and low MgO(0.06 wt%-0.16 wt%),TiO2(0.09 wt%-0.10 wt%),and P205(0.047 wt%-0.103 wt%)contents.They are enriched in Rb,U,K and Hf but depleted in Ba,Nb,Ta,Sr and Ti.By geochemical and mineralogical features,we propose that the Xiaofan granites belong to A-type type granite and dominantly sourced from the crust.The granites from the Xiaofan Mo deposit may have formed in a post-collision extensional setting.
