玻纤布上胶车间有机溶剂废气净化处理

介绍了工厂有机溶剂废气处理方案和设计及实际运行效果,具有简单经济、净化彻底的特点.     

Effect of bound residues of metsulfuron-methyl in soil on rice growth

A pot experiment was conducted to appraise the hazards of bound residues of metsulfuron-methyl in soil at six levels (0, 0.050, 0.089, 0.158, 0.281, and 0.500 mg kg(-1)) to the growth of four rice varieties (Xiushui 63, Eryou 810, Liangyoupeijiu, and Zhenong 952). The morphological characteristics of rice roots like root number, total length, surface area of rice roots, and rice biomass were determined. The results showed that the bound residues of metsulfuron-methyl in soil impacted the growth of rice. Root number, total length of roots, surface area of roots, and biomass were restrained by bound residues of metsulfuron-methyl in soil. The inhibition rate of root growth increased from 69.46-81.32% to 85.18-95.97% with the increasing of levels of bound residues of metsulfuron-methyl from 0.05 mg kg(-1) to 0.50 mg kg(-1). The number of rice roots could be taken as a sensitive index to screen the rice varieties endurable to bound residues of metsulfuron-methyl in soil and to predict the potential hazards of bound residues of metsulfuron-methyl in soil to rice. The level of bound residues of metsulfuron-methyl in soil causing the root numbers decreased by 50% (IC50) followed the order of Xiushui 63 < Eryou 810 < Liangyoupeijiu < Zhenong 952.     

新生态二氧化锰对水中三价砷去除作用的研究

研究了新生态MnO2对水中As(Ⅲ)的去除效果。结果表明:新生态MnO2对As(Ⅲ)去除率高,作用速度快,作用过程符合二级动力学方程;pH=6.5时吸附等温线符合Langmuir和Frundlich方程;pH<7时,As(Ⅲ)的去除率均达80%以上,受pH和初始浓度影响较小,且与H3AsO3的pKa无关的非特性吸附;阴离子与As(Ⅲ)有吸附竞争作用,阳离子的加入可使As(Ⅲ)的去除率接近100%。     

电磁辐射与电磁防护

本文讨论了电气进程带来的电磁辐射污染及其防护问题。从电磁辐射的来源、作用人群、对人体的影响方式阐述了电磁辐射防护的必要性。介绍了电磁辐射暴露限值标准、电磁辐射防护原理、防护装备标准及产品现状。提出了现有电磁辐射暴露限值标准及防护装备产品标准的不足,指出现阶段应进行的进一步工作：考虑非致热效应对人体的影响,完善统一电磁辐射暴露限值标准;增加电磁辐射防护装备标准覆盖面,以利加强监管,进一步规范产品市场。     

Impacts of the Rising Opportunity Cost of Farm Labor on Agricultural Land Use Structure: Theory and Empirical Evidences

Abstract

Nowadays the rising of opportunity cost of farm labor comes to the forefront of attention in China. In order to understand its impact on agricultural land-use structure, a theoretical framework of household economics is formulated drawn on Low’s model. Under the theoretical framework, the impact of the rising opportunity cost of on-farm on cropping structure is deduced in theory. And then, using statistic and survey data, taking mountain area of southern Ningxia as an example, the theoretical assumes are verified. The results show that the rise of opportunity cost of farm labor leads to less diversified cropping structure.     

Identifying resource and environmental carrying capacity in the Yangtze River Economic Belt,China: the perspectives of spatial differences and sustainable development

Environment, Development and Sustainability - The resource and environmental carrying capacity (RECC) is an important foundation and support for a city or region, and determines the direction of...     

卫星遥感技术在管理长江流域水资源方面的应用研究

详细讨论了卫星遥感技术在长江流域水资源管理方面的应用问题，提出了两种实用的方法：①卫星遥感技术在灌溉水资源管理方面的应用；②长江流域地下水、地表水资源估算。进一步分析了两种方法的特点，介绍了卫星遥感技术的优点及用途，建议在长江流域水资源管理中加以利用。     

A systemic health risk assessment for the chromium cycle in Taiwan

Health risk assessment (HRA) has been recognized as a useful tool for identifying health risks of human activities. In particular, this method has been well applied to spatially defined units, such as a production plant, a treatment facility, and a contaminated site. However, the management strategies based on the risk information will be more efficient if the comprehensive picture of total risks from all kinds of sources is depicted. In principle, the total risks can be obtained when all risk sources are assessed individually. Apparently, this approach demands huge amount of efforts. This study develops a methodology that combines substance flow and risk estimation to facilitate examination of risk in a systemic way and provide comprehensive understanding of risk generation and distribution corresponding to flows of substances in the anthroposphere and the environment. Substance flow analysis (SFA) and HRA method is integrated to produce a systemic risk assessment method, from which substance management schemes can be derived. In this study, the chromium cycle in Taiwan is used as an example to demonstrate the method, by which the associated substance flow in the economy and the risk caused by the substance in the environmental system is determined. The concentrations of pollutants in the environmental media, the resultant risks and hazard quotients are calculated with the widely-used CalTOX multimedia model.     

Analysis of the Energy Embodied in Foreign Goods Trade of China

In recent years, scientists have been increasingly interested in the energy embodied in traded goods among countries. In this article, the direct energy intensities in various economic sectors of China were calculated with the data of energy consumption and output value of each sector, and the input-output table was used to estimate the external energy consumption. The total energy intensity of all sectors was then obtained. From the data of international trade, the energy embodied in goods trade of China was estimated for the period of 1994-2001. During this period, the average energy intensity of imported goods was always higher than that of exported ones. As a country with a surplus in international goods trade, China actually imported net embodied energy in the past few years. The net embodied energy imported was at the same magnitude of the imported energy in the form of fossil fuels.     

固定化脱色菌－活性污泥的脱色性能研究

将所筛选的高效脱色菌群,采用聚集－交联法固定在活性污泥上,形民絮状立体网状微观结构。固定化脱色菌－活性污泥的脱色酶活力较未经固定的活性污泥提高７０％左右。经厌氧条件下处理针织厂印染废水,色度平均去降率为７７．３％,ＣＯＤＣｒ平均去除率为６５．１％。