为了实现废物循环利用及节能减排,以磷化工副产物磷铁废渣、磷酸、过氧化氢为原料合成了羟基磷酸铁进而制备了磷酸铁锂,并采用多种测试方法对产物进行了分析.实验结果表明,当磷酸/过氧化氢配比为1.2/1时合成的羟基磷酸铁的结晶度最好,...为了实现废物循环利用及节能减排,以磷化工副产物磷铁废渣、磷酸、过氧化氢为原料合成了羟基磷酸铁进而制备了磷酸铁锂,并采用多种测试方法对产物进行了分析.实验结果表明,当磷酸/过氧化氢配比为1.2/1时合成的羟基磷酸铁的结晶度最好,由其制备的磷酸铁锂首次放电容量可达151.6 m Ah/g,库仑效率达93%.同时,实验过程实现了零污染、低成本,为磷酸铁锂正极材料制备提供了新方向.展开更多
A polymeric hydroxyl ferric phosphate(PHFP)was prepared by using a byproduct of titanium dioxide containing ferrous sulfate and phosphates under alkaline condition.The PHFP was used to immobilize lead(Pb)and cadmium(C...A polymeric hydroxyl ferric phosphate(PHFP)was prepared by using a byproduct of titanium dioxide containing ferrous sulfate and phosphates under alkaline condition.The PHFP was used to immobilize lead(Pb)and cadmium(Cd)in soils.Fourier transform infrared spectra,X-ray diffraction were applied to revealing the characteristics of PHFP,and the modified Tessier sequential extraction and column leaching experiment with simulated acid rain were used to assess the effectiveness of immobilization of Cd and Pb in soils by PHFP.The results showed that PHFP was indeed a polymer with complicated OH-Fe-P structure and consisted of Fe6(OH)5(H2O)4(PO4)4(H2O)2and Fe25(PO4)14(OH)24.Moreover,the removal rates of DTPA-extractable Cd and Pb in soils reached up to33%and45%,and the water-soluble Cd and Pb decreased by56%and58%,respectively,when PHFP was added in soils at4%dosage.In addition,the immobilization of Cd and Pb contributed to transforming water soluble,exchangeable and carbonate-bonded fractions to Fe and Mn oxides-bonded,organic-bonded and residual fractions.Under leaching with simulated acid rain,Cd and Pb release amount in PHFP amended soil declined by53%and52%,respectively,as compared with non-treated soil.The result implied that PHFP had a potential application for the remediation of Cd-and Pb-contaminated soils.展开更多
文摘为了实现废物循环利用及节能减排,以磷化工副产物磷铁废渣、磷酸、过氧化氢为原料合成了羟基磷酸铁进而制备了磷酸铁锂,并采用多种测试方法对产物进行了分析.实验结果表明,当磷酸/过氧化氢配比为1.2/1时合成的羟基磷酸铁的结晶度最好,由其制备的磷酸铁锂首次放电容量可达151.6 m Ah/g,库仑效率达93%.同时,实验过程实现了零污染、低成本,为磷酸铁锂正极材料制备提供了新方向.
基金Project(2012GS430203)supported by Science and Technology Program for Public Wellbeing,ChinaProject(51504299)supported by the National Natural Science Foundation of ChinaProject(2015WK3016)supported by Science and Technology Program of Hunan Province,China
文摘A polymeric hydroxyl ferric phosphate(PHFP)was prepared by using a byproduct of titanium dioxide containing ferrous sulfate and phosphates under alkaline condition.The PHFP was used to immobilize lead(Pb)and cadmium(Cd)in soils.Fourier transform infrared spectra,X-ray diffraction were applied to revealing the characteristics of PHFP,and the modified Tessier sequential extraction and column leaching experiment with simulated acid rain were used to assess the effectiveness of immobilization of Cd and Pb in soils by PHFP.The results showed that PHFP was indeed a polymer with complicated OH-Fe-P structure and consisted of Fe6(OH)5(H2O)4(PO4)4(H2O)2and Fe25(PO4)14(OH)24.Moreover,the removal rates of DTPA-extractable Cd and Pb in soils reached up to33%and45%,and the water-soluble Cd and Pb decreased by56%and58%,respectively,when PHFP was added in soils at4%dosage.In addition,the immobilization of Cd and Pb contributed to transforming water soluble,exchangeable and carbonate-bonded fractions to Fe and Mn oxides-bonded,organic-bonded and residual fractions.Under leaching with simulated acid rain,Cd and Pb release amount in PHFP amended soil declined by53%and52%,respectively,as compared with non-treated soil.The result implied that PHFP had a potential application for the remediation of Cd-and Pb-contaminated soils.
