Poly (Vinyl Alcohol) Composite Membrane with Polyamidoamine Dendrimers for Efficient Separation of CO2/H2 and CO2/N2

Journal of Polymers and the Environment - Although polyvinyl alcohol (PVA) membranes are commonly used for CO2 separation, there is still large development space in mechanical properties and high...     

植物相容型生态混凝土制作与性能试验

以碎石、水泥、生物有机肥料、耕植土等为基本原材料,构建垫层(耕植土)、基质层(大孔蓄容混凝土和填充料)和面层(植被层).制备适合植物生长、耐冲刷、具有一定强度的植物相容型生态混凝土.初步探讨了各配比对植被生长的影响、植物最终穿透混凝土块体长至耕植土中的可能性、以及混凝土的力学性能.     

Plug-in electric vehicles in China and the USA: a technology and market comparison

Mitigation and Adaptation Strategies for Global Change - As the top two plug-in electric vehicle (PEV) markets in the world, China and the United States of  America (USA) have developed...     

生物表面活性剂在城市污泥静态强制通风好氧堆肥中的作用

采用静态强制通风好氧堆肥模式对城市剩余污泥进行堆肥降解,并研究了生物表面活性剂鼠李糖脂对堆肥过程的作用。结果表明,堆肥过程中,添加了质量分数为0.015%鼠李糖脂溶液堆制处理和空白对照堆制处理的堆温变化都明显呈现出中温期0～5 d、高温期6～12 d和降温期13～28 d 3个阶段。实验组比空白组的堆体升温快、高温期持续时间长、堆体的含水率高。鼠李糖脂的添加,使实验组的微生物数量高于空白组。添加鼠李糖脂的堆体和空白堆体的种子发芽指数(GI)在堆肥结束时分别为53.70%和50.80%,说明鼠李糖脂促进了堆肥的腐熟,但由于相对浓缩效应,堆肥产品的重金属含量略高于空白堆体。生物表面活性剂的介入促进了堆肥中木质纤维素的初步降解。研究表明,添加鼠李糖脂能够改善堆肥处理的微环境,促进有机质降解和堆肥的腐熟。     

错流膜生物反应器水力清洗特性研究

采用外压管式聚砜－聚丙烯腈共混超滤膜进行错流膜生物反应器水力清洗特性研究,结果表明,清洗时采用高膜面流速、低操作压力和限制透过液对流传递作用有利于错流膜生物反应器通量的恢复,这符合膜藏去除过程中的传质机理;适宜的膜面流速应稍大于临界流速ｖｋ＝１．９２ｍ／ｓ,清洗时间应控制在１０ｍｉｎ,适宜的清洗操作压力为０．０７ＭＰａ。     

综合地球物理方法在城市活断层探测中的应用综述——以哈尔滨城市活断层探测项目为例

综述从活动断裂的研究和进展出发,通过追溯国内外活动断裂研究发展历史,结合当前城市活动断裂研究的理论与方法,认为地球物理的综合物探手段在城市活断层探测工作中将会越来越重要。文中重点介绍了城市活断层探测工作中所采用的地球物理方法的类型,以及在区域探查与初步鉴定阶段、详细探测与精确定位阶段、孕震构造探测阶段可能涉及到的各种地球物理探测方法、适用范围及所能解决的主要问题等。文章结合哈尔滨城市活断层探测项目实例,表明在面对岩石和地层的众多物性差异和勘查结果的多解性时,地球物理的综合物探方法在提高资料的反演和解译准确度方面具有十分重要的意义。     

Type 3 secretion system 1 of Salmonella typhimurium and its inhibitors: a novel strategy to combat salmonellosis

Environmental Science and Pollution Research - Unsuccessful vaccination against Salmonella due to a large number of serovars, and antibiotic resistance, necessitates the development of novel...     

Study on the distribution characteristics and ecological risk of heavy metal elements in coal gangue taken from 25 mining areas of China

Environmental Science and Pollution Research - The long-term, high-yield production of coal has resulted in the large-scale accumulation of coal gangue on the ground surface, which causes serious...     

Distribution of Economic Benefits from Ecotourism: A Case Study of Wolong Nature Reserve for Giant Pandas in China

Ecotourism is widely promoted as a conservation tool and actively practiced in protected areas worldwide. Theoretically, support for conservation from the various types of stakeholder inside and outside protected areas is maximized if stakeholders benefit proportionally to the opportunity costs they bear. The disproportional benefit distribution among stakeholders can erode their support for or lead to the failure of ecotourism and conservation. Using Wolong Nature Reserve for Giant Pandas (China) as an example, we demonstrate two types of uneven distribution of economic benefits among four major groups of stakeholders. First, a significant inequality exists between the local rural residents and the other types of stakeholder. The rural residents are the primary bearers of the cost of conservation, but the majority of economic benefits (investment, employment, and goods) in three key ecotourism sectors (infrastructural construction, hotels/restaurants, and souvenir sales) go to other stakeholders. Second, results show that the distribution of economic benefits is unequal among the rural residents inside the reserve. Most rural households that benefit from ecotourism are located near the main road and potentially have less impact on panda habitat than households far from the road and closer to panda habitats. This distribution gap is likely to discourage conservation support from the latter households, whose activities are the main forces degrading panda habitats. We suggest that the unequal distribution of the benefits from ecotourism can be lessened by enhancing local participation, increasing the use of local goods, and encouraging relocation of rural households closer to ecotourism facilities.     

Regeneration of the waste lubricating oil based upon flyash adsorption / solvent extraction

Environmental Science and Pollution Research - In order to explore the high value-added utilization of flyash adsorption in regenerating waste lubricating oil, the main factors related to the...