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CMC/P(AMPS-co-AA)水凝胶对Pb(Ⅱ)的吸附动力学及吸附机理研究 被引量:11
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作者 曹春 巨天珍 陈兴鹏 《环境化学》 CAS CSCD 北大核心 2013年第10期1909-1916,共8页
利用液下放电等离子体引发技术在水溶液中一步制得羧甲基纤维素钠/聚(2-丙烯酰胺基-2-甲基丙磺酸-co-丙烯酸)(CMC/P(AMPS-co-AA))水凝胶.用扫描电镜/X射线能量色散谱(SEM/EDS)、红外光谱(FT-IR)、X射线光电子能谱(XPS)对水凝胶吸附Pb(Ⅱ... 利用液下放电等离子体引发技术在水溶液中一步制得羧甲基纤维素钠/聚(2-丙烯酰胺基-2-甲基丙磺酸-co-丙烯酸)(CMC/P(AMPS-co-AA))水凝胶.用扫描电镜/X射线能量色散谱(SEM/EDS)、红外光谱(FT-IR)、X射线光电子能谱(XPS)对水凝胶吸附Pb(Ⅱ)前后的形貌和结构进行了表征,同时探讨了该水凝胶对Pb(Ⅱ)的吸附动力学行为和机理.结果表明,水凝胶在吸附Pb(Ⅱ)的过程中存在物理作用、离子交换和配位作用,吸附行为符合动力学准二级模型,该水凝胶脱附后还可重复利用. 展开更多
关键词 羧甲基纤维素钠(CMC) 水凝胶 吸附 铅离子
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Evaluation of Rural Tourism Resources based on the Tourists Perspective: A Case Study of Lanzhou City, China 被引量:3
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作者 PU Lili LU Chengpeng CHEN Xingpeng 《Journal of Resources and Ecology》 CSCD 2022年第6期1087-1097,共11页
Rural tourism has become a hot spot in China’s tourism development. Based on the AHP model and the comprehensive evaluation method of fuzzy cognition, this paper builds an evaluation system for the evaluation of rura... Rural tourism has become a hot spot in China’s tourism development. Based on the AHP model and the comprehensive evaluation method of fuzzy cognition, this paper builds an evaluation system for the evaluation of rural tourism resources, including resource value, environmental factors, reception conditions with three criterion layers, and 25 evaluation factors. We recovered 574 valid questionnaires through two online forms and field research in Lanzhou city, and then used them to complete the empirical analysis. The results show four main aspects of the tourists’ perspective on rural tourism resources. Firstly, rural tourists are concerned about higher service facilities. The evaluation of rural tourism resources pays more attention to the reception conditions, and tourists pay more attention to the facilities of the reception conditions. In addition, the reception condition value accounts for a more concentrated 8–10 points(61.4%), which is higher than environmental elements(58.87%) and the value of the resource itself(54.26%). Secondly, tourists’ attention to rural tourism resources mainly focuses on the pleasurable(0.1152), tour line design(0.1014), experience(0.0765), ornamental(0.0747) and other aspects. Thirdly, the degree of cognition mainly focuses on nature(4508), environmental safety(4469), pleasantness(4387), accommodation conditions(4367), tour line design(4363) and other aspects of the rural tourism resources. Fourthly, the cognition of rural tourism resources is basically given priority with 6–9 points, and environmental factors accounted for the highest portion. However, rural tourists have higher expectations for the popularization and education of rural tourism resources, but the sense of acquisition is relatively low. Through the further improvement and improvement of the naturalness of environmental resources, environmental safety of reception conditions, and the enjoyment of external traffic and resource value, the overall benefit of rural tourism resources is maximized. The results of this study can provide reference for the theoretical foundation of rural tourism resources. 展开更多
关键词 rural tourism resources RECOGNITION tourist perspective AHP Lanzhou City
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