An Experimental and Metamodeling Approach to Tensile Properties of Natural Fibers Composites

Journal of Polymers and the Environment - The present work presents an analysis of the tensile properties of Palm as well as Luffa natural fiber composites (NFC) in high density polyethylene...     

Investigation of migration rule of rainwater for sponge city roads under different rainfall intensities

Environmental Geochemistry and Health - Urban development and climate change have led to severe waterlogging in cities. To study the degree of mitigation of urban waterlogging using the design of...     

Association of urinary or blood heavy metals and mortality from all causes,cardiovascular disease,and cancer in the general population: a systematic review and meta-analysis of cohort studies

Environmental Science and Pollution Research - Amounting epidemiological evidence has shown detrimental effects of heavy metals on a wide range of diseases. However, the effect of heavy metal...     

Migration,Transformation and Removal of Macrolide Antibiotics in The Environment: A Review

Environmental Science and Pollution Research - Macrolide antibiotics (MAs), as a typical emerging pollutant, are widely detected in environmental media. When entering the environment, MAs can...     

ICCLP: An Inexact Chance-Constrained Linear Programming Model for Land-Use Management of Lake Areas in Urban Fringes

Lake areas in urban fringes are under increasing urbanization pressure. Consequently, the conflict between rapid urban development and the maintenance of water bodies in such areas urgently needs to be addressed. An inexact chance-constrained linear programming (ICCLP) model for optimal land-use management of lake areas in urban fringes was developed. The ICCLP model was based on land-use suitability assessment and land evaluation. The maximum net economic benefit (NEB) was selected as the objective of land-use allocation. The total environmental capacity (TEC) of water systems and the public financial investment (PFI) at different probability levels were considered key constraints. Other constraints included in the model were land-use suitability, governmental requirements on the ratios of various land-use types, and technical constraints. A case study implementing the system was performed for the lake area of Hanyang at the urban fringe of Wuhan, central China, based on our previous study on land-use suitability assessment. The Hanyang lake area is under significant urbanization pressure. A 15-year optimal model for land-use allocation is proposed during 2006 to 2020 to better protect the water system and to gain the maximum benefits of development. Sixteen constraints were set for the optimal model. The model results indicated that NEB was between $1.48 × 10⁹ and $8.76 × 10⁹ or between $3.98 × 10⁹ and $16.7 × 10⁹, depending on the different urban-expansion patterns and land demands. The changes in total developed area and the land-use structure were analyzed under different probabilities (q _i ) of TEC. Changes in q _i resulted in different urban expansion patterns and demands on land, which were the direct result of the constraints imposed by TEC and PFI. The ICCLP model might help local authorities better understand and address complex land-use systems and develop optimal land-use management strategies that better balance urban expansion and grassland conservation.     

鄱阳湖沙山植物叶片与土壤C∶N、C∶P沿沙化梯度分布特征

在鄱阳湖多宝沙山沿沙化梯度测定了17种常见植物叶片及土壤有机碳(C)、全氮(N)、全磷(P)含量,以阐明沙山常见植物种与土壤C〖DK〗∶N、C〖DK〗∶P分布特征及对沙化的响应,为沙山植被恢复提供基础数据。结果表明：（1）植物叶片C〖DK〗∶N、C〖DK〗∶P分布范围为185～1273、1698～5071,平均值分别为431、3418;土壤0～10、10～30、30～50 cm层C〖DK〗∶N变化范围分别为98～463、24～465和37～450; 相应土层C〖DK〗∶P范围分别为198～759、30～905和47～765。（2）植物C〖DK〗∶N、C〖DK〗∶P对沙化的响应模式一致,均表现出在重度沙化区数值最小;土壤C〖DK〗∶N随沙化程度增加表现出降低趋势,而C〖DK〗∶P则表现出增加趋势,二者对沙化的响应不一致。（3）植物C〖DK〗∶N、C〖DK〗∶P变化主要取决于叶片的N、P含量;土壤C〖DK〗∶N的变化受控于土壤N含量;C〖DK〗∶P变化则决定于土壤有机C含量     

“矿井通风与安全”课程教学实践与探讨

针对“矿井通风与安全”内容多、范围广、理论性和实践性很强等特点,结合笔者教学实践,从注重教学内容的精选、注重案例分析、注重知识的延伸、注重课程设计环节以及注重教学方法等5个方面出发,探讨如何提高学生对该课程的学习主动性和积极性,增强学习效果的问题。     

激光脱附／电离飞行时间质谱法测定多环芳烃

采用激光脱附／电离飞行时间质谱技术测定了蒽、二苯并（ａ,ｈ）蒽,晕苯四种多环芳烃化合物在２６６ｎｍ激光作用下的“软”电离飞行时间质谱,对蒽、二苯并（ａ,ｈ）蒽、晕苯四种化合物进行的分析结果表明激光脱附／电离飞行时间质谱是一种简单、快速、高灵敏度分析多环芳烃化合物的方法,对晕苯,检出限可达１０＾１６ｍｏｌ。     

天柱山旅游环境承载力研究

研究构建了旅游环境承载力模型，对天柱山旅游环境承载力进行了定量分析，并采用问卷调查方法进行了深入探讨。研究表明，天柱山具有良好的旅游环境承载力本底值，风景区尚未大片开发，空间环境容量与实际接待游客量之间尚有很大的空间，基础设施容量突显制约性作用，提出了提高环境承载力的对策与建议，为天柱山旅游可持续发展提供了理论依据。     

地铁颗粒物特征分析及磁性过滤控制

通过SEM-EDX和XRD对采集来的地铁颗粒物（PM10和PM2.5）进行形貌和成分分析,研究结果表明：地铁颗粒物具有粒径大（可达10 μm）、形状不规则、表面具有明显的刮擦痕迹等特征,主要成分为Si、C、O和Fe;其中Fe主要以Fe3O4、Fe2O3等氧化物的形式存在。针对地铁颗粒物含铁磁的特性,采用磁性过滤控制方法对地铁颗粒物开展研究,构建的磁性过滤装置对该地铁颗粒物的捕获效果可达90%以上,在一定磁性强度范围内（0 ~ 0. 300 T）,滤网对颗粒物的捕获效果随着对其施加的磁性强度增加而提升,当施加的磁场强度为0. 300 T时,装置对地铁颗粒物的捕获效率接近100%,比相同条件下对飞灰的捕获效率高出10% ~ 15%,建议把磁过滤作为一种前处理装置用在含磁颗粒物处理上。