用煤矸石制取聚合氯化铝絮凝剂

利用煤矸石通过高温焙烧、酸浸、聚合制取聚合氯化铝絮凝剂产品,并以自制模拟水样为检验对象用聚合氯化铝对其进行絮凝试验,优化了聚合氯化铝的絮凝条件。结果表明,在焙烧温度700℃、盐酸用量40mL、浸出温度90℃、浸出时搅拌时间为90min时,浊度去除率达到84.27%     

粉煤灰制备聚硅酸盐絮凝剂的研究进展

介绍了粉煤灰的现状和主要化学成分及性质,综述了高效提取粉煤灰中硅、铝和铁的方法,以及利用提取物质制备聚硅酸盐絮凝剂的方法、条件和水处理效果;重点分析了粉煤灰的物化改性的方法、原理和效果,总结了粉煤灰制备絮凝剂的工艺和方法,对如何更高效提取粉煤灰中有用物质和制备更优越絮凝性能的絮凝剂提出了建议.     

絮凝沉淀去除马铃薯淀粉加工废水中蛋白的试验研究

采用絮凝沉淀法去除马铃薯淀粉废水中的蛋白质。经过方案比选．最终选择聚丙烯酰胺作为絮凝剂,结果表明：在聚丙烯酰胺投加量为70mg／L,pH值为5,温度为20℃,反应时间40min的最佳工艺条件下。采用聚丙烯酰胺絮凝沉淀法对马铃薯淀粉加工废水中的COD、蛋白质、BOD、SS都有一定的去除效果。COD的去除率保持在30％～40％,蛋白质的去除率保持在45％～55％,BOD的去除率保持在10％-15％．SS的去除率保持在50％-60％,大大减轻了后续处理构筑物的负担。     

废纸纤维对聚合氯化铝铁的助凝效果研究

通过混凝沉淀试验,本文研究了废纸纤维对聚合氯化铝铁(PAFC)的助凝效果。试验结果表明,当原水浊度为21.8 NTU,PAFC投加量为10 mg/L,废纸纤维投加量为30 mg/L时,出水浊度为1.45NTU,浊度去除率可达93.35%。使用时,废纸纤维宜在快速搅拌前投加,并采用100 r/min的速度进行中速搅拌,与PAFC配合使用,适宜处理不同浊度的原水,且近中性偏碱性条件下处理效果较好。     

混凝剂去除生活污水中磷的效果分析

以生活污水为研究对象,分别对PAC、聚硅酸铝铁、氯化铁、PAM等4种混凝剂的除磷效果进行了实验分析,同时考察了4种混凝剂对氨氮、COD的去除效果。实验表明：当氯化铁投加量为150 mg/L时,对总磷、COD去除效果最佳,4种混凝剂对氨氮去除效果都很差。     

粉煤灰在水处理中的应用

介绍了粉煤灰在水处理中的应用,着重阐述了粉煤灰作为吸附剂、絮凝剂、助凝剂在废水处理中的应用现状,提出了粉煤灰在处理废水中存在的一些问题、研究方向和应用前景.     

利用粉煤灰制取彩色地面砖的研究与开发

研究了利用粉煤灰制取彩色地面砖的激发剂选取与最佳配方、制造技术，并对所制得的粉煤灰彩色地面砖的质量进行了检验。检测结果表明，其产品达到了JC446—9l普通地面砖的质量标准。     

改性粉煤灰在工业污水中的应用

粉煤灰是电厂煤燃烧时产生的多孔颗粒状废弃物,具有一定的吸附性。经试验研究发现,如果对粉煤灰进行无机、有机或者物理改性后,或者是能增加孔隙率,或者是能增加表面活性,使吸附性能明显提高。另外还可以把粉煤灰合成混凝剂,如合成聚硅酸铁铝PSAF,在工业污水处理中取得很好的效果,并有广泛的推广价值。同时作为多孔颗粒状物质,是很好的滤料,可应用在生物曝气滤池中。最后讨论了粉煤灰在使用中的问题及今后的发展趋势。     

粉煤灰碱熔融分解制备合成4A^°型沸石的原料

研究了粉煤灰和碳酸钠助剂混合后在高温下焙烧，碱熔融分解制备合成沸石原料的新方法。通过正交试验选定了最佳分解条件。该条件下粉煤灰中的大部分硅，铝等有效成分能够溶出为合成4A沸石的原料，分解产物为霞石。     

β-环糊精接枝聚丙烯酰胺处理含Cr~(3+)废水

以β-环糊精和聚丙烯酰胺为原料,接枝反应合成β-CD-PAM絮凝剂,分别用β-CD-PAM、β-环糊精、聚丙烯酰胺处理模拟含Cr3+废水,研究药品用量、温度、pH值等因素对去除效果的影响。试验结果表明:β-CD-PAM与β-环糊精、聚丙烯酰胺相比,对Cr3+去除能力皆有明显提高;β-CD-PAM处理浓度为10mg/L的Cr3+标准溶液,最优化条件组合为:药品投加量1.5g/L、温度35℃、pH值5⁶,去除率可达到87.23%。     

Penetration and Post-infection Development of Meloidogyne Incognita on Tobacco as Treated by Rhizobacteria Pseudomonas Fluorescens Strain P-72-10

The bio-control potential of rhizospere bacteria Pseudomonas fluorescens against plant-parasite nematode had been demonstrated. P. fluorescens had shown the effect to enhance tobacco resistance to root-knot nematode Meloidogyne incognita. Inoculation with P. fluoreseens in tobacco could lead to significant reductions in the number of juveniles that penetrated tobacco root and further life stage development of the juveniles. The number of juveniles penetrated into tobac- co root in treatment with P. fluorescens is significantly different from CK at 2DAI, 6DAI, 8DAI and 10DAI. Significant reduction and delayed development of juveniles that penetrated into tobacco root and treated were observed in treatment at 14DAI, 21DAI, 28DAI and 35DAI. In addition, P. fluoreseens treatment leads to a significant reduction in the number of eggs per egg-mass at 35 DAI. The results show P. fluorescens induced a continuously suppression on root-knot nema- tode M. incognita throughout their entire early infection phase of root penetration, subsequent life stage development and reproduction.     

利用膜技术回收利用碱性废水研究进展

回顾了利用膜分离技术处理碱性废水的工艺与综合利用技术所取得的丰硕成果，总结了各种治理方法的特点、适用性及发展方向。     

Taxing Times in Indonesia: The Challenge of Restoring Competitiveness and the Search for Fiscal Space

Indonesia’s economic growth picked up slightly in mid-2016 but remains below the level demanded by government and popular aspirations. Despite a plethora of reforms intended to increase efficiency and productivity, some policies are perverse and longstanding problems of implementation remain. The share of manufacturing has declined, the real exchange rate has appreciated, exports have dwindled, and growth has been trending downwards. The banking sector is stable but inefficient, with wide net interest margins and numerous barriers to competition. Trade protection, particularly in basic food commodities, has created high costs that weigh particularly heavily on the poor. Declining government revenues have placed increasing pressure on the public budget, even as the current administration aims to increase spending on infrastructure and welfare and to enhance productivity. In an effort to increase revenues, the government has announced a tax amnesty program and other measures. In addition, Sri Mulyani Indrawati, the new finance minister, has taken steps to cut non-essential expenditure in order to secure high spending on infrastructure and at the same time keep within the 3% budget deficit limit stipulated by law. Although the overall debt situation is not yet alarming, declining revenues and budget cuts that do not fully reflect this decline are putting pressure on increasing debt levels. The government’s high-profile tax amnesty program was the major policy initiative implemented in the second half of 2016 that aimed to relieve this pressure. Despite widespread criticism of, and scepticism about, the tax amnesty (both within and outside Indonesia), its first phase had a much higher participation rate than most independent accounts expected. Revenues raised so far through the amnesty are less than 60% of the official target, but this is actually a strong result for the short term. The bigger question, however, is whether the amnesty is a key element of a more encompassing strategy to overhaul the system of taxation and tax administration.     

The causes of Japan's ‘lost decade’: The role of household consumption

In this paper, I analyze the causes of the prolonged slowdown of the Japanese economy in the 1990s and find that the stagnation of investment, especially private fixed investment, was the primary culprit. I then investigate the causes of the stagnation of household consumption during the 1990s and find that the stagnation of household disposable income, the decline in household wealth, and increased uncertainty about the future are among the contributing factors. Finally, I consider whether demand side factors or supply side factors were more important as causes of the prolonged slowdown of the Japanese economy in the 1990s and conclude that the former (especially misguided government policies) were probably more important.     

我国发展天文旅游的条件、前景探析及策略思考

天文旅游资源从成因可以分为行星地球天文旅游资源、天体天文旅游资源和天文文化旅游资源三类。天文旅游方兴未艾,我国天文旅游具有很大发展前景。文章对我国开展天文旅游的条件进行了分析,对发展天文旅游的策略和措施进行了梳理。     

城市社会的开放与农民的城市化

城市社会在对农民的开放与封闭之中徘徊。改革开放后城市社会对农民的开放已经使很多农民城市化。城市社会对农民的封闭已由政策性封闭转向经济性封闭。城市社会对农民的封闭增加了农民城市化的成本和社会风险。必须加强城市社会对农民的开放,逐步消除对农民的封闭政策,以推进农民的城市化。     

信息化时代商学院图书馆的建设与发展——中、美四大名校商学院图书馆建设的比较与启示

信息化时代中美商学院图书馆的建设与发展,成为当今时代高等商学教育发展与进步的一个重要环节,对中美四大商学院图书馆的发展状况、差距进行分析比较,对促进我国商学院图书馆事业的改革、建设和发展具有一定的启示作用和参考价值。