The presence of impurities in phosphogypsum has long impeded its effective utilization,highlighting the need for energy-efficient and sustainable purification methods.This study proposes a novel purification strategy ...The presence of impurities in phosphogypsum has long impeded its effective utilization,highlighting the need for energy-efficient and sustainable purification methods.This study proposes a novel purification strategy that synergistically combines pH regulation and micelle-assisted treatment to create an optimized microenvironment for impurity removal.Under mechanical grinding conditions,this approach enhances the rheological properties of the phosphogypsumslurries and facilitates the dissolution and removal of impurity ions.Experimental results demonstrate that the synergistic method achieves a remarkable 64.01%increase in whiteness while significantly reducing soluble phosphorus and fluoride content in a single-step process.This technique not only achieves high purification efficiency but also offers a practical pathway for the high-value utilization of phosphogypsum.These findings suggest that this method has substantial potential for enhancing sustainable resource management and enabling broader industrial applications of purified phosphogypsum.展开更多
This study aims to assess the comprehensive strengthening effect of a steel-ultra high performance concrete(UHPC)composite strengthening method.The axial force-moment interaction curve(N-M curve)was calculated in a no...This study aims to assess the comprehensive strengthening effect of a steel-ultra high performance concrete(UHPC)composite strengthening method.The axial force-moment interaction curve(N-M curve)was calculated in a novel way,using cross-sectional strains at ultimate states as well as real-time stress measurements for each material.The enclosed area of the N-M curve was defined as a comprehensive performance index for the system.We validate our approach with comparisons to numerical modeling and full-scale four-point bending experiments.Additionally,strengthening effects were compared for different sagging and hogging moments based on material stress responses,and the impact of various strengthening parameters was analyzed.We find that the N-M curve of the strengthened cross-section envelops that of the un-strengthened cross-section.Notably,improvements in flexural capacity are greater under sagging moments during the large eccentric failure stage,and greater under hogging moments during the small eccentric failure stage.This discrepancy is attributed to the strength utilization of strengthening materials.These findings provide a reference for understanding the strengthening effects and parameters of steel-UHPC composite.展开更多
This study investigated the relationship between social anxiety and problematic Internet use in college students,and how it is moderated by attitudes toward seeking professional psychological help.Participants were 14...This study investigated the relationship between social anxiety and problematic Internet use in college students,and how it is moderated by attitudes toward seeking professional psychological help.Participants were 1451 Chinese college students(female=60.2%;mean age=19.85 years,SD=1.89 years).They completed the Interaction Anxiousness Scale,the Attitudes Toward Seeking Professional Psychological Help Scale-Short Form,and the Problematic Internet Use Scale.The results revealed that college students with higher social anxiety reported greater severity of problematic Internet use.Moreover,students with negative attitudes toward seeking professional psychological help also reported greater severity of problematic Internet use.Notably,attitudes toward seeking professional psychological help moderated the relationship between social anxiety and problematic Internet use in college student,such that the relationship was weakened when attitudes toward seeking professional psychological help was positive.These findings suggest a need for student development and support programs for promoting openness to seeking professional psychological help if with problematic Internet use from social anxiety.展开更多
基金financially supported by the Key Research and Development Program of Hubei Province(No.2022BCA082 and No.2022BEC013).
文摘The presence of impurities in phosphogypsum has long impeded its effective utilization,highlighting the need for energy-efficient and sustainable purification methods.This study proposes a novel purification strategy that synergistically combines pH regulation and micelle-assisted treatment to create an optimized microenvironment for impurity removal.Under mechanical grinding conditions,this approach enhances the rheological properties of the phosphogypsumslurries and facilitates the dissolution and removal of impurity ions.Experimental results demonstrate that the synergistic method achieves a remarkable 64.01%increase in whiteness while significantly reducing soluble phosphorus and fluoride content in a single-step process.This technique not only achieves high purification efficiency but also offers a practical pathway for the high-value utilization of phosphogypsum.These findings suggest that this method has substantial potential for enhancing sustainable resource management and enabling broader industrial applications of purified phosphogypsum.
基金supported by the National Natural Science Foundation of China(Nos.51938005,52090082,and 52378395)the National Key Research and Development Program of China(No.2023YFB2604402).
文摘This study aims to assess the comprehensive strengthening effect of a steel-ultra high performance concrete(UHPC)composite strengthening method.The axial force-moment interaction curve(N-M curve)was calculated in a novel way,using cross-sectional strains at ultimate states as well as real-time stress measurements for each material.The enclosed area of the N-M curve was defined as a comprehensive performance index for the system.We validate our approach with comparisons to numerical modeling and full-scale four-point bending experiments.Additionally,strengthening effects were compared for different sagging and hogging moments based on material stress responses,and the impact of various strengthening parameters was analyzed.We find that the N-M curve of the strengthened cross-section envelops that of the un-strengthened cross-section.Notably,improvements in flexural capacity are greater under sagging moments during the large eccentric failure stage,and greater under hogging moments during the small eccentric failure stage.This discrepancy is attributed to the strength utilization of strengthening materials.These findings provide a reference for understanding the strengthening effects and parameters of steel-UHPC composite.
基金funded by Science and Technology Research Project of Jiangxi’Department of Education(GJJ2200929)Key Project of Guangzhou Psychological Society(2023GZPS05).
文摘This study investigated the relationship between social anxiety and problematic Internet use in college students,and how it is moderated by attitudes toward seeking professional psychological help.Participants were 1451 Chinese college students(female=60.2%;mean age=19.85 years,SD=1.89 years).They completed the Interaction Anxiousness Scale,the Attitudes Toward Seeking Professional Psychological Help Scale-Short Form,and the Problematic Internet Use Scale.The results revealed that college students with higher social anxiety reported greater severity of problematic Internet use.Moreover,students with negative attitudes toward seeking professional psychological help also reported greater severity of problematic Internet use.Notably,attitudes toward seeking professional psychological help moderated the relationship between social anxiety and problematic Internet use in college student,such that the relationship was weakened when attitudes toward seeking professional psychological help was positive.These findings suggest a need for student development and support programs for promoting openness to seeking professional psychological help if with problematic Internet use from social anxiety.
