超声-过氧化氢-氧化铜组合技术催化氧化水中苯酚

研究了超声-H2O2-CuO组合技术对苯酚的降解效果。考察了苯酚初始浓度、溶液温度及鼓入空气对苯酚去除率的影响。实验结果表明，与未鼓入空气时相比，连续鼓气时苯酚的降解效果较好；初始浓度低，苯酚去除率高；溶液温度从20％上升到55％时，苯酚去除率随温度升高而增大，温度对该过程的影响主要表现为对催化剂的影响而不是对超声作用的影响。高效液相色谱分析表明，苯酚降解的中间产物主要为对苯二酚、邻苯二酚及其他有机小分子物质，最终产物为草酸、二氧化碳和水。     

活性炭纤维吸附废水中对硝基苯酚及其脱附研究

采用新型高效吸附剂——活性炭纤维吸附废水中对硝基苯酚，对其吸附和脱附影响因素进行了较详细的研究，确定了最佳工艺参数，并对动态吸附一脱附进行了稳定性实验。在最佳的吸附条件下，装填4g活性炭纤维可处理含对硝基苯酚1000mg/L的废水1400mL，出水对硝基苯酚浓度〈2mg／L，达到国家综合污水一级排放标准，活性炭纤维有效吸附量可达349．87mg／g。在最佳脱附条件下，脱附率〉99％，并可从高浓度脱附液中回收对硝基苯酚。稳定性实验表明，吸附-脱附性能稳定，采用活性炭纤维吸附处理对硝基苯酚废水是一种行之有效的处理方法。     

膜生物反应器生物降解与膜分离共作用特性研究

膜生物反应器实质是生物降解与膜分离相互影响,共同作用的过程,污泥浓度与通量之间存在一定的相关关系,膜分离对生和性能尤其是细菌活性有着重要的影响,而生物反应器内细菌胞外聚合物,溶解性有机物及微细胶体可能成为形成凝胶层导致通量下降的主要因素。     

催化湿式氧化中负载型催化剂的稳定性与应用

催化剂在应用过程中必须具有良好的催化活性和稳定性.优化制备的CuO/γ-Al2O3催化剂用于处理高浓度难降解的乳化液废水时具有良好的催化活性,在200℃时反应2 h,TOC去除率为81.3%,比未加催化剂的湿式氧化提高了14.9%.该催化剂对分散兰废水具有更高的活性和稳定性:在220℃反应1.5 h后,COD和TOC去除率分别为68.8%和56.5%,比非催化氧化分别提高了18.7%和18.9%.     

Study on the cytotoxicity of microcystin-LR on cultured cells

The toxicity of purified blue-green algal toxin, microcystin-LR, on permanent cell lines KB, NIH/3T3, H-4-II-E, HeLa, Vero, Hep G2, Caco-2 and HL-60 was studied. Assessment of cell viability using colorimetric 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays indicated that purified microcystin-LR induced toxic effect on KB and H-4-II-E cell lines after 96 h incubation at toxin concentrations greater than 18.75 microg/ml. KB cell line was selected for further study when reproducibility, consistency and sensitivity were considered. Significant amounts of lactate dehydrogenase (LDH) were released from KB cells when incubation durations were 72 and 96 h with toxin concentrations of 18.75 microg/ml and higher. Although previous studies suggested that microcystin-LR had no cytotoxic effect on permanent cell lines, LDH release assay performed on KB cells indicated that exposure to microcystin-LR could result in damage to the cell membrane.     

一种新型烟气脱硫技术在燃煤锅炉上的扩大试验

介绍了用硫化碱加TFS添加剂进行燃煤锅炉煤气脱硫并副产硫代硫酸钠的中试成果。     

臭氧-曝气生物滤池处理酸性玫瑰红染料废水

在实验室配制含酸性玫瑰红染料的印染废水，采用臭氧氧化-曝气生物滤池工艺开展处理试验。试验运行结果表明，臭氧氧化处理能提高模拟废水的可生化性，BOD／COD值由原水的0．18上升到0．36。经组合工艺处理后出水COD〈40mg／L，色度40倍以下，SS约50mg／L，处理效果良好。     

Does planned retreat matter? Investigating land use change under the impacts of flooding induced by sea level rise

Coastal regions worldwide are during the process of rapid urban expansion. However, expanded urban settlements in land-sea interfaces have been faced with unprecedented threats from climate change related hazards. Adaptation to coastal hazards has received increasing attention from city managers and planners. Adaptation and land management practices are largely informed by remote sensing and land change modeling. This paper establishes a framework that integrates land change analysis, coastal flooding, and sea level rise adaptation. Multilayer perceptron neural network, similarity learning, and binary logistic regression were applied to analyze spatiotemporal changes of residential, commercial, and other built-up areas in Bay County, Florida, USA. The prediction maps of 2030 were produced by three models under four policy scenarios that included the population relocation strategy. Validation results reveal that three models return overall acceptable accuracies but generate distinct landscape patterns. Predictions indicate that planned retreat of residents can greatly reduce urban vulnerability to sea level rise induced flooding. While managed realignment of the coast brings large benefits, the paper recommends different mixes of adaptation strategies for different parts of the globe, and advocates the application of reflective land use planning to foster a more disaster resilient coastal community.     

宝钢中厚板分公司煤干燥机除尘系统风量调整技术探究

文章针对宝钢股份中厚板分公司炼铁厂煤干燥机除尘系统吸尘点冒灰,粉尘无组织排放超标的现象进行了测试分析,数据表明主要由除尘系统风量匹配不佳、吸尘点风量不合理造成。笔者通过不断调整阀门及风机档板开摩,测试调整后的风量、除尘性能、岗位粉尘浓度等参数,确定了一个合理的系统风量,不仅可以达到环境排放及职业卫生的要求,而且充分挖掘了除尘系统潜力,达到了节能降耗、经济运行的目的,同时对类似除尘系统风量匹配不佳、扬尘等问题也形成了有效的解决方案。     

地表水环境的灰色聚类分析

在环境质量评价中,环境系统包含的信息是不完全的和非确定性的,因此环境系统是一个灰色系统。传统的评价方法已不能满足要求,灰色聚类分析方法正是考虑了环境系统这一特点,因此现已被成功地运用于环境质量评价中。采用灰色聚类分析对西安某河流进行评价,并运用主成分分析各年之间的污染程度以及各污染指标之间相互关系,有效地提取了信息。