突发性环境污染事故应急监测的措施分析

突发性环境污染事故会对环境造成较大的伤害,如果不能及时采取措施,就会使污染进一步扩大,不仅带来经济的损失,而且会破坏到生态的平衡。因此,要建立起突发环境污染事故的应急监测,这样才能尽可能的减少突发性环境污染事件的影响。基于此,本文从突发性环境污染事故的特征入手,首先分析其应急监测的意义,然后探究具体的措施,希望可以借此给突发性环境污染应急监测的相关研究提供一定的参考意见。     

Metagenomic analysis reveals the effects of cotton straw–derived biochar on soil nitrogen transformation in drip-irrigated cotton field

Environmental Science and Pollution Research - Biochar has been widely accepted as a soil amendment to improve nitrogen (N) use efficiency, but the effect of biochar on N transformation metabolic...     

The research of market structures for remanufactured products

The rapid development of technology has made it easier to distribute products directly, and many enterprises excel at executing a multi-channel strategy to distribute products. The introduction of direct channel adds a new competition dimension to the enterprises. This paper considers three market channel structures: R-Channel, D-Channel and H-Channel. In R-Channel, both new products and remanufactured products are sold through a retailer. In D-Channel, new products are sold through retailers and remanufactured products are sold directly to consumers. In H-Channel, new products are sold through retailers, while remanufactured products through dual channel. Using the game theory, we obtain and analyse the equilibrium prices, market demands and the profits gain under these three settings. At the same time, the influence of consumers’ willingness to pay on the environment performance is researched. Our results show that the manufacturer prefers H-Channel. By introducing the direct channel the manufacturer is always economically better off, but it is not for the retailer. The numerical simulation also confirms the theoretical analysis and shows that H-Channel has advantages of economic benefit and environmental performance. It is feasible for practical application.     

叉车检验中几个问题处理的探讨

基于多年叉车实际检验工作,结合TSG N0001-2017《场(厂)内专用机动车辆安全技术监察规程》,探讨叉车的定义和使用区域,指出资料审核环节中容易被忽视的一些细节,分析叉车检验中存在的问题并提出相应建议,可为叉车的安全使用、监督管理以及检验检测提供一定参考.     

甜菜制糖生产废水提标改造设计分析

食品废水处理对我国的经济发展以及环境业提高具有重要的推动作用。本文以某制糖厂为例,对甜菜制糖废水处理站的提标改造工程进行详细分析,在此基础上进行合理设计。     

基于DMSP-OLS夜间灯光数据的长江经济带城镇体系空间格局演变（1992～2013）

研究长江经济带城镇体系空间格局演变，对于透视长江经济带城镇体系空间格局演变特征和规律以及促进长江经济带城镇体系空间格局优化发展有着重要意义。利用多时相同期Landsat卫星数据以及运用聚类分析方法对长江经济带夜间灯光数据进行校正，并采用其他辅助数据法对比分析获取城镇建成区面积的阈值，在此阈值基础之上选取景观总面积、总斑块数量和聚集度指数等总共8个典型景观格局指标, 继而使用FRAG-STATS 4.2 软件对1992~2013年间长江经济带城镇发展的空间格局变化进行计算分析。研究结果表明：(1）1992~2013年间，长江经济带城镇化快速扩展，城镇建成区面积增加了9.68倍，斑块数量增加了2.39倍，斑块密度也得到较大的增加，反映出长江经济带城镇数量不断增加和城镇建成区面积不断扩大；（2）景观斑块形状复杂度逐渐上升，中小城市不断壮大，同时出现了较多的新兴小城镇，总边界长度和平均边界密度的年均增长速度分别为21.56%和21.58%，体现了长江经济带城镇间聚集度越来越高，相互影响也越来越大；(3）最大斑块指数和聚集度指数两个指标在整体上呈现出逐年下降的态势，但是景观总面积、总斑块数量和斑块密度等8个指标在演变过程中均存在一定的波动和无序化，反映出长江经济带在城镇化过程中呈现出不规则和无序化的特征。     

Methyl methacrylate (MMA) and alumina recovery from waste artificial marble powder pyrolysis

Journal of Material Cycles and Waste Management - Owing to various advantages of artificial marble compared to natural marble, its application has been rising exponentially, which has resulted in...     

海河干流流域暴雨径流非点源污染负荷解析与控制策略

随着点源污染逐渐得到有效控制,非点源污染对海河干流流域水环境污染的贡献日益增大,对其污染负荷进行科学测算成为海河干流水质达标方案制订的重要前提。基于GIS技术,通过土地利用类型划分,利用PLOAD模型对海河干流的暴雨径流非点源污染负荷进行了计算。结果表明,海河干流流域建设用地的比例依海河流向自上而下逐渐递减,而涉农用地逐渐增加,城区地表径流与农业面源污染分别是上、下游地区重要的非点源污染负荷来源。关于流域的暴雨径流非点源污染负荷,CODCr为15 619.29 t/a,NH3-N为369.16 t/a,TN为851.20 t/a,TP为250.29 t/a。为改善海河干流水质,非点源污染控制应纳入流域的污染物总量控制计划中,与点源污染一起参与环境容量的分配与控制。