Bentonite produced in Xiazijie, Xinjiang (China) was characterized by X-ray diffraction (XRD), dif- ferential thermal analysis (DTA), thermogravimetric analysis (TG) and cation exchange capacity (CEC). The ben- tonite...Bentonite produced in Xiazijie, Xinjiang (China) was characterized by X-ray diffraction (XRD), dif- ferential thermal analysis (DTA), thermogravimetric analysis (TG) and cation exchange capacity (CEC). The ben- tonite is composed of dioctahedral montmorillonite with predominant quantity, certain amounts of quartz, feldspar and illite and minor amounts of kaolinite, gypsum, etc. The raw bentonite has a CEC of 0.6497 meq·g-1 and allows to be characterized as typical sodium bentonite. In order to bleach cottonseed oil, optimum conditions for sulfuric acid activation of the raw bentonites were investigated, which were obtained by selecting various acid strength, at 96—98℃ and activating for 4h with 1︰2 solid-liquid ratio. The acid activation bentonites were suitable for decol- orization of cottonseed oil through removing carotene and chlorophyll. The bleaching capabilities of different pig- ments with activated bentonite with treatment of 25% sulfuric acid were 70.3%, 73.1%, 83.2%, 81.8% and 88.9%, respectively. Bleaching with acid activated bentonite gave oils lower peroxide values and acid values.展开更多
Tourism-oriented revitalization of historic districts has been identified as a form of sustainability which is believed to contribute to both conservation and development.Comprehensive assessments of the effects of su...Tourism-oriented revitalization of historic districts has been identified as a form of sustainability which is believed to contribute to both conservation and development.Comprehensive assessments of the effects of such tourism-oriented revitalizations in historic districts are thus a great challenge,and are needed to support sustainable development and management efforts.In this study criteria and indicators were identified by using the AHP method with experts scoring four aspects on two levels.We assess a case in China using this system and outputs indicated infrastructure and environment performed best,while the score for residents’living condition and participation was the lowest.Finally,we offer some suggestions to improve the relatively poor status in order to assist historic districts in achieving sustained revitalization.展开更多
基金Supported by Doctor Funds Xinjiang Production and Construction Corps (ZDGG2004-01) and Shihezi University’s Key Scien-tific and Technological Project of China (04BSZJ04).
文摘Bentonite produced in Xiazijie, Xinjiang (China) was characterized by X-ray diffraction (XRD), dif- ferential thermal analysis (DTA), thermogravimetric analysis (TG) and cation exchange capacity (CEC). The ben- tonite is composed of dioctahedral montmorillonite with predominant quantity, certain amounts of quartz, feldspar and illite and minor amounts of kaolinite, gypsum, etc. The raw bentonite has a CEC of 0.6497 meq·g-1 and allows to be characterized as typical sodium bentonite. In order to bleach cottonseed oil, optimum conditions for sulfuric acid activation of the raw bentonites were investigated, which were obtained by selecting various acid strength, at 96—98℃ and activating for 4h with 1︰2 solid-liquid ratio. The acid activation bentonites were suitable for decol- orization of cottonseed oil through removing carotene and chlorophyll. The bleaching capabilities of different pig- ments with activated bentonite with treatment of 25% sulfuric acid were 70.3%, 73.1%, 83.2%, 81.8% and 88.9%, respectively. Bleaching with acid activated bentonite gave oils lower peroxide values and acid values.
基金National Natural Science Foundation of China(41801139)Science and Technology Support Program of the Institute of Geographic Sciences & Natural Resources Research,CAS(Y8V80105YZ)+1 种基金Social Science Planning Project of Beijing Municipal Education Commission(SM201810017002)The Strategic Priority Research Program of the Chinese Academy of Sciences(XDA23100302)
文摘Tourism-oriented revitalization of historic districts has been identified as a form of sustainability which is believed to contribute to both conservation and development.Comprehensive assessments of the effects of such tourism-oriented revitalizations in historic districts are thus a great challenge,and are needed to support sustainable development and management efforts.In this study criteria and indicators were identified by using the AHP method with experts scoring four aspects on two levels.We assess a case in China using this system and outputs indicated infrastructure and environment performed best,while the score for residents’living condition and participation was the lowest.Finally,we offer some suggestions to improve the relatively poor status in order to assist historic districts in achieving sustained revitalization.
