超声波预处理提高污泥好氧消化性能研究

为评价超声波预处理对提高污泥生物消化的作用,采用超声波预处理与好氧消化衔接,测试了污泥消化的溶解性有机物(SCOD)、TSS及蛋白酶变化过程.结果表明,污泥超声波预处理效果较好的能量密度与时间分别为12 kW/L和10 min,此时有机物释放与能量输入之比较优;在此条件下,经预处理后的污泥好氧消化性能明显比未处理的高.消化时间为10.5 d时,经超声波预处理的污泥TSS减量42.7%,而未处理的污泥仅减量20.9%.经超声波预处理后,污泥中的蛋白酶活性明显提高;同时,超声波预处理释放出较多的可溶性物质.因此,增加的可溶性物质与蛋白酶活性使得污泥迅速降解,提高了污泥好氧消化效率,缩短了污泥好氧消化时间.     

环糊精改性沸石制备方法及对对-硝基苯酚吸附性能的影响

在碱性条件下,β-环糊精与2,3-环氧丙基三甲基氯化铵合成了阳离子化的β-环糊精(CCD),并用于改性沸石获得环糊精改性沸石(CDMZ).研究了CCD合成条件对CDMZ吸附对.硝基苯酚性能的影响.结果表明,在2,3-环氧丙基三甲基氯化铵与β-环糊精的配比为7:1,溶液pH=13的合成条件下,合成的CCD改性沸石所得CDMZ对对-硝基苯酚的吸附能力最佳.同时研究了沸石改性前的活化处理,CCD改性沸石的初始浓度和改性时间对CDMZ吸附对-硝基苯酚性能的影响.实验表明,改性前用NaCl溶液活化沸石有助于CDMZ吸附性能的改善;当CCD改性沸石的初始浓度和改性时间分别为15 g/L(以β-环糊精计)和8 h时,所得CDMZ对对-硝基苯酚(120 mg/L)的吸附能力可达263.7μg/g.     

Information system with multiple data layer approach to select the C&D waste landfilling infrastructure

Environmental Science and Pollution Research - Landfilling is a critical method in managing massive generated C&D waste, and the appropriate selection of C&D waste landfill sites...     

Cobalt exposure in relation to cardiovascular disease in the United States general population

Environmental Science and Pollution Research - Cobalt exposure has adverse health effects on the cardiovascular system in occupational and laboratory studies, but these effects have not been...     

可见分光光度法测定水质总氮的研究

水质总氮检测,对水资源保护、环境保护至关重要。文章以此为中心,对水质总氮检测方法进行改进,并从实验原理、消解速度、线性、准确性、干扰等方面进行分析讨论,提出了一种水质总氮检测的新方法。     

Exploring the influencing factors of carbon neutralization in Chinese manufacturing enterprises

One of the key issues facing the government in achieving carbon neutrality is what methods can be used to effectively reduce carbon emissions. Taking manufacturing enterprises as an example, this paper studies the carbon emission reduction effects of green technology innovation subsidy (GIS), carbon tax (CT), and carbon emission trading (CET). Under the background of social welfare and carbon emission reduction efficiency, we get the results of optimal carbon emission reduction measures in different environments. The results are as follows: (1) In the initial and mature stage of green technology innovation, GIS is the best choice to improve the degree of green manufacturing and maximize social welfare. CT and CET are the best choice to obtain the highest SE (carbon emission reduction efficiency). (2) In the transitional stage, CET and CT can promote the maturity of green technology. However, with the maturity of green technology, the promotion of green technology has weakened. CT is the best choice to achieve the highest SE. (3) When the carbon tax or carbon trading price is at a high or low level, raising the tax rate or carbon trading price can increase the income of enterprises. Therefore, the government should take measures according to the objectives of different stages. When the goal is to maximize social benefits, GIS is the best choice in the initial stage and transition stage, and CET or CT is the best choice in the transition stage. In the initial stage and fertilization stage, when the highest SE, CT, or CET is the best choice, while in the transition stage, CT is the best choice.

     

长江产业带投资条件比较与综合分等评价

将长江干流沿江地区建设成具有强大经济实力的国家级产业密集带是９０年代国家调整宏观经济发展布局的重大战略举措。在大规模投资开发过程中如何按照各地投资环境特点，选择最佳的投资区位和适宜的投资方向是十分重要的。本文选取了能基本反映研究地区投资环境状况的基础设施条件，经济发展水平，科教发达程度，主要资源赋存和区域环境质量５类因素共１４项指标，以产业带范围内的４０个地市为地域单元，对产业带内部的投资环境条件     

以科学发展观为指导在发展中推进生态环境保护

作者指出，我国生态环境形势不容乐观；可持续发展战略是中国特色社会主义建设的必然选择；要实施四大战略，全面加强生态环保。     

中国黄土高原的形成过程与整治研究

从黄土高原的形成过程,黄土-古土壤性征的对比,孢粉、石器、历史、地理以及水土流失的定位观测资料,说明目前黄土高原的严重水土流失是人类破坏植被,不合理利用土地和直接毁灭土壤透水和抗冲能力的结果,而不是一个天然的地质过程。以“28字方略”为中心的水土保持措施是开发整治黄土高原水土资源和治理黄河的根本。     

A pathway toward future sustainability: Assessing the influence of innovation shocks on CO2 emissions in developing economies

Environment, Development and Sustainability - The prior empirical research focuses on examining only the procyclical impact of innovation on carbon emissions (CO2e), in the majority of cases, for...