The leaching behaviors of calcium and magnesium in the rare earth tailings leached with magnesium sulfate using deionized water,CaCl2 solution and lime water were investigated.Experimental data indicated that magnesiu...The leaching behaviors of calcium and magnesium in the rare earth tailings leached with magnesium sulfate using deionized water,CaCl2 solution and lime water were investigated.Experimental data indicated that magnesium in the tailings was easy to be leached out since most of the magnesium was in the form of water-soluble phase.Most of calcium in the lime water was electrostatically adsorbed on the clay mineral of the tailings,and the water-soluble magnesium was also gradually converted into exchangeable phase because of back-adsorption of Mg2+on the clay mineral with increasing the pH values.When the liquid-to-solid ratio was 0.80,the contents of readily-available magnesium and calcium were 104.4−207.6 and 201.7−1426.3 mg/kg,respectively,which could meet the requirements for plants.These results suggest a promising route for the environmental remediation of ion-adsorption rare earth ore after in-situ leaching.展开更多
The purpose of this study is to explore how business organizations could effectively promote positive environmental norms among a larger section of the community. This study hypothesized that the development of a feel...The purpose of this study is to explore how business organizations could effectively promote positive environmental norms among a larger section of the community. This study hypothesized that the development of a feeling of high involvement among employees of organizations implementing the Environmental Management System （EMS） could result in the spillover phenomena of other environmentally responsible behavior in different domains such as, consumer preferences for environment-friendly products. The study also confirms the effects of environmental attitude （EA） and concrete knowledge （CK） as a mediator; acting not only as an axis to the spillover phenomenon but is also found to be the crucial factor in determining the strength of the whole spillover process.展开更多
The national image is multi-dimensional, outbound tourism is one of the most intuitive ways. The outbound tourism behavior of Individual citizen is not only considered as the outward manifestation of individual civil ...The national image is multi-dimensional, outbound tourism is one of the most intuitive ways. The outbound tourism behavior of Individual citizen is not only considered as the outward manifestation of individual civil quality, but also considered as the emblem the quality of all citizens of whole country, affects the national image, related to the country＇s national influence and credibility. The outbound tourism of Chinese citizens brought about the rapid growth of the enormous economic benefits and influence, which makes the outbound tourism behavior of Chinese citizens gotten more concern. The uncivilized outbound tourism behavior of Chinese citizens are frequent, which brings extremely strong damage, and which serious impact on the healthy image about the Ancient civilization and the country of ceremonies of China, and which greatly restricts the spread of a good national image of China. Based on the analysis about the characteristics of rapid growth outbound tourism of Chinese citizens, this paper discusses the approaches of current Chinese national image shaping, put forward that China must strengthen citizen education, and improve relevant laws and regulations, and strengthen supervision, only then might Chinese citizens outbound tourism uncivilized behavior be prevented from the root.展开更多
基金The authors are grateful for the financial supports from the National Key Research and Development Program of China(2018YFC1801803)the Major Research Plan of the National Natural Science Foundation of China(91962211).
文摘The leaching behaviors of calcium and magnesium in the rare earth tailings leached with magnesium sulfate using deionized water,CaCl2 solution and lime water were investigated.Experimental data indicated that magnesium in the tailings was easy to be leached out since most of the magnesium was in the form of water-soluble phase.Most of calcium in the lime water was electrostatically adsorbed on the clay mineral of the tailings,and the water-soluble magnesium was also gradually converted into exchangeable phase because of back-adsorption of Mg2+on the clay mineral with increasing the pH values.When the liquid-to-solid ratio was 0.80,the contents of readily-available magnesium and calcium were 104.4−207.6 and 201.7−1426.3 mg/kg,respectively,which could meet the requirements for plants.These results suggest a promising route for the environmental remediation of ion-adsorption rare earth ore after in-situ leaching.
文摘The purpose of this study is to explore how business organizations could effectively promote positive environmental norms among a larger section of the community. This study hypothesized that the development of a feeling of high involvement among employees of organizations implementing the Environmental Management System （EMS） could result in the spillover phenomena of other environmentally responsible behavior in different domains such as, consumer preferences for environment-friendly products. The study also confirms the effects of environmental attitude （EA） and concrete knowledge （CK） as a mediator; acting not only as an axis to the spillover phenomenon but is also found to be the crucial factor in determining the strength of the whole spillover process.
文摘The national image is multi-dimensional, outbound tourism is one of the most intuitive ways. The outbound tourism behavior of Individual citizen is not only considered as the outward manifestation of individual civil quality, but also considered as the emblem the quality of all citizens of whole country, affects the national image, related to the country＇s national influence and credibility. The outbound tourism of Chinese citizens brought about the rapid growth of the enormous economic benefits and influence, which makes the outbound tourism behavior of Chinese citizens gotten more concern. The uncivilized outbound tourism behavior of Chinese citizens are frequent, which brings extremely strong damage, and which serious impact on the healthy image about the Ancient civilization and the country of ceremonies of China, and which greatly restricts the spread of a good national image of China. Based on the analysis about the characteristics of rapid growth outbound tourism of Chinese citizens, this paper discusses the approaches of current Chinese national image shaping, put forward that China must strengthen citizen education, and improve relevant laws and regulations, and strengthen supervision, only then might Chinese citizens outbound tourism uncivilized behavior be prevented from the root.
