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活性炭纤维(ACF)电极法处理染料废水的探讨 总被引:40,自引:4,他引:40
根据Advanced Chemical Oxidation^[1][6]的原理,通过ACF电极的引入,使得电化学处理成为一个自由基反应与絮凝反应相结合的过程,对于多种模拟印染废水可以具有良好的处理效果。通过与其他方法的对比实验,表明在色度去除率方面不比Fenton试剂法逊色,并明显优于絮凝法。经过单级处理,对于实验范围内的还原染料、酸性染料、活性染料及硫化染料,其脱色率全部大于90%,大多数为98 相似文献
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生物膜填料床内废气净化的理论模型 总被引:2,自引:0,他引:2
介绍了废气生物净化技术的基本原理,并对废气生物净化技术中的生物过滤法和生物滴滤法的理论模型研究进展进行了综述,探讨了理有理论模型存在的主要问题。 相似文献
215.
Wenjuan Liao Hao-Jie Cui Yaqi Ning Cong Wu Wei Peng Dong Cheng Lichu Yin Weijun Zhou 《环境科学学报(英文版)》2023,35(2):688-698
It has been documented that organic contaminants can be degraded by hydroxyl radicals ( • OH) produced by the activation of H2 O2 by Fe(II)-bearing clay. However, the interfacial electron transfer reactions between structural Fe(II) and H 2 O 2 for • OH generation and its effects on contaminant remediation are unclear. In this study, we first investigated the relation between • OH generation sites and sulfamethoxazole (SMX) degradation by activating H2O2 using nontronite with different reduction extents. SMX (5.2–16.9 μmol/L) degradation first increased and then decreased with an increase in the reduction extent of nontronite from 22% to 62%, while the • OH production increased continually. Passivization treatment of edge sites and structural variation results revealed that interfacial electron transfer reactions between Fe(II) and H 2 O 2 occur at both the edge and basal plane. The enhancement on basal plane interfacial electron transfer reactions in a high reduction extent rNAu-2 leads to the enhancement on utilization efficiencies of structural Fe(II) and H 2 O 2 for • OH generation.However, the • OH produced at the basal planes is less efficient in oxidizing SMX than that of at edge sites. Oxidation of SMX could be sustainable in the H 2 O 2 /rNAu-2 system through chemically reduction. The results of this study show the importance role of • OH generation sites on antibiotic degradation and provide guidance and potential strategies for antibiotic degradation by Fe(II)-bearing clay minerals in H 2 O 2 -based treatments. 相似文献
216.
Model calculating annual mean atmospheric dispersion factor for coastal site of nuclear power plant 总被引:1,自引:0,他引:1
HU Er-bang YAO Ren-tai ZHANG Mao-shuan GAO Zhan-rong WANG Shu-xian CHEN Jia-yi JIA Pei-rong Liao Qi-lin 《环境科学学报(英文版)》2001,13(3):280-290
IntroductionAnatmospheredispersionfieldexperimentwasdoneonthecoastalsiteofnuclearpowerplant (NPP)intheeastpartofChinaduring 1995— 1996 Thecontentofthisexperimentincludes:hourlyobservationofwindandtemperatureonthetowerof10 0m ;Observationofsurfacewindandseeandl… 相似文献
217.
利用芬顿和光-芬顿工艺降解垃圾渗滤液纳滤浓缩液中的难降解有机物。起始pH值5.0及较低H_2O_2/Fe~(2+)投加量时,芬顿法的氧化-絮凝作用可以去除70%以上的COD。采用芬顿氧化-絮凝和光-芬顿组合工艺处理不同浓度纳滤浓缩液时,H_2O_2/Fe~(2+)投加量为35 m M/8 m M和90 m M/10 m M时均可实现90%的COD和TOC去除率;组合工艺出水COD为112~160 mg/L,BOD/COD为0.35~0.43。纳滤浓缩液中检出的13种多环芳烃经过组合工艺处理后的总去除率均约在90%。 相似文献
218.
Ching-Hsien Ho Huu-Sheng Lur Ming-Hwi Yao Fang-Ching Liao Ying-Ting Lin Nobuyuki Yagi Hsueh-Jung Lu 《Mitigation and Adaptation Strategies for Global Change》2018,23(3):311-347
According to Food and Agriculture Organization and Intergovernmental Panel on Climate Change reports, climate change will lead to a severe food-supply problem. In the future, food production will continually decrease because of aggravated effects of climate change, causing food production to continually decrease. Food production will be unable to satisfy the demand of the global population, leading to a food-security crisis. As the world population continues to increase, the shortage of food will become increasingly severe, particularly for those located in “climate impact hotspots” of tropical, subtropical, small-island countries, and countries that are dependent on imports to meet domestic demand such as Taiwan. Numerous Taiwanese studies have suggested that agricultural and fishery productivity has declined because of climate variation, which may cause changes and instability in food quantity and quality, and increase deficiency and uncertainty in the food supply. Therefore, to discuss the risks posed by climate change to the stability of food supply and demand, this paper, taking Taiwan as a case, explored the impact of climate variation on food security and future adaptation strategies. TaiCCAT’s supportive system for decision-making (TSSDA) was adopted here to assess and analyze the current situations of agricultural and fisheries production and supply, as well as future food supply risks, in addition to evaluating the deficiencies in the existing climate adaptation strategies in order to plan and revise feasible future adaptation alternatives. Based on the rule of risk management, the adaptation strategies recommended in this study were differentiated into two categories: proactive adaptation and planned adaptation. Proactive adaptation is emphasized to counter the uncertainty of food production, which increases the difficulty of production and necessity to import food. Conversely, planned adaptation can be used to manage the uncertainty of food supply to implement adjustments in production and marketing, as well as to mitigate the impact of climate variation. 相似文献
219.
基于高斯烟团模型建立了适合新场气田的输气管道泄漏模型,考虑了管道压力、泄漏衰减、环境因素的影响,模拟分析了管道压力、泄漏时间与大气稳定度对泄漏天然气燃爆区域的影响,并计算获得了新场气田某干线天然气泄漏下风向燃爆极限距离图版,对指导管道安全政策、方案制定具有重要意义。 相似文献
220.