An investigation on the promoting effect of Pr modification on SO2 resistance over MnOx catalysts for selective reduction of NO with NH3

Environmental Science and Pollution Research - Pr-modified MnOx catalyst was synthesized through a facile co-precipitation process, and the results showed that MnPrOx catalyst exhibited much better...     

Construction of double tube granular sludge microbial fuel cell and its characteristics and mechanism of azo dye degradation

Environmental Science and Pollution Research - Microbial fuel cells (MFCs) can obtain electrical energy from extensive organic matter and complete wastewater treatment at the same time. The...     

中国三大海洋经济圈海洋经济发展区域差异与分布动态及影响因素

考察中国海洋三大经济圈海洋经济发展区域差异,探究其分布动态演进规律,识别其空间非均衡的影响因素及空间溢出效应,为“十四五”期间优化海洋经济发展空间布局、推动区域海洋经济协同均衡发展提供决策参考。利用Dagum基尼系数及其分解方法考察三大海洋经济圈海洋经济发展区域相对差异的程度、来源及演变态势,在此基础上,进一步应用Kernel密度估计方法刻画其绝对差异的分布动态演进过程,并将空间效应纳入研究框架,应用空间计量分析方法识别海洋经济发展空间非均衡的影响因素及空间溢出效应。研究发现：三大海洋经济圈海洋经济发展均呈现稳定上升态势,但三者之间存在显著的分级现象;三大海洋经济圈空间非均衡程度显著,超变密度是造成三大海洋经济圈整体区域差异的主要来源;三大海洋经济圈海洋经济发展水平“极化效应”显著,呈现不同极化特征和分布延展性;三大海洋经济圈海洋经济发展存在显著的空间依赖性,总体表现为空间正相关。     

智能化驱动下矿工变革支持行为的代际差异研究*

为促进煤矿智能化变革,提升安全生产水平,结合价值观匹配理论,建立安全价值观匹配、工作满意度和矿工变革支持行为的理论假设模型。基于567名智能化矿山矿工的有效数据,应用结构方程模型和Bootstrap方法进行路径检验及中介效应检验,并采用多群组分析方法检验代际差异的分类调节作用。研究结果表明:内部安全理念匹配和外部社会责任匹配均对矿工变革支持行为有显著正向影响;工作满意度对矿工变革支持行为具有显著正向影响,同时在安全价值观匹配与矿工变革支持行为的关系中起中介作用;内部安全理念匹配和外部社会责任匹配对新生代矿工变革支持行为的影响效用均大于老一代矿工。提高矿工与组织的安全价值观匹配程度和工作满意度,减少老一代矿工的变革阻力,有利智能化矿山建设。     

Injectable Methylcellulose and Hyaluronic Acid Hydrogel Containing Silver Nanoparticles for Their Effective Anti-microbial and Wound Healing Activity After Fracture Surgery

Journal of Polymers and the Environment - Currently, the synthesis of silver nanoparticles (AgNPs) was utilized for various life-saving biomedical applications. Herein, we report the synthesis and...     

Governmentality within China's South-North Water Transfer Project: tournaments,markets and water pollution

The control of water pollution in China's South-North Water Transfer Project (SNWTP) is examined through the lens of promotion tournaments as Chinese governmentality to offer a special perspective on China's hydro-politics and Chinese manners of water pollution control. This paper characterizes the existing form of governmentality in the SNWTP, pointing to its problems and potential resolutions. The promotion tournament is a market system with authoritarian control, designed to reconcile the incentives of local officials and the central managers of the SNWTP. This governmentality embodies characteristics of China's authoritarian water management system: centralized personnel control combined with market-oriented promotion competitions. However, a clear conflict between the requirements of ecological modernization and the use of power in China's water management system leads to distorted behaviors among local officials, an important source of problems in China's water management system. Compared to promotion tournaments, payments for ecosystem services or eco-compensation are applications of neoliberal environmentalism that could overcome the shortcomings of tournaments, and become the most critical governmentality for water pollution control in the SNWTP.     

Behavior of flames propagating through lycopodium dust clouds in a vertical duct

The structure of flame propagating through lycopodium dust clouds has been investigated experimentally. Upward propagating laminar flames in a vertical duct of 1800 mm height and 150×150 mm square cross-section are observed, and the leading flame front is also visualized using by a high-speed video camera. Although the dust concentration decreases slightly along the height of duct, the leading flame edge propagates upwards at a constant velocity. The maximum upward propagating velocity is 0.50 m/s at a dust concentration of 170 g/m³. Behind the upward propagating flame, some downward propagating flames are also observed. Despite the employment of nearly equal sized particles and its good dispersability and flowability, the reaction zone in lycopodium particles cloud shows the double flame structure in which isolated individual burning particles (0.5–1.0 mm in diameter) and the ball-shaped flames (2–4 mm in diameter; the combustion time of 4–6 ms) surrounding several particles are included. The ball-shaped flame appears as a faint flame in which several luminous spots are distributed, and then it turns into a luminous flame before disappearance. In order to distinguish these ball-shaped flames from others with some exceptions for merged flames, they are defined as independent flames in this study. The flame thickness in a lycopodium dust flame is observed to be 20 mm, about several orders of magnitude higher than that of a premixed gaseous flame. From the microscopic visualization, it was found that the flame front propagating through lycopodium particles is discontinuous and not smooth.     

清洁生产审核中无/低费方案的产生及实施

清洁生产审核是实施清洁生产最有效的,也是最具可操作性的方法。在清洁生产审核预评估和评估阶段提出可行的无/低费方案,并按照"边审核边实施"的原则对所提的无/低费方案加以实施,能够使企业在短时间内达到"节能、降耗、减污、增效"的目的。以某化肥企业为例,找出企业存在的问题,评估企业的产排污情况,有针对性地提出了无/低费方案,并得以实施,为企业创造了一定的经济效益和环境效益。