共查询到20条相似文献，搜索用时 406 毫秒
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高校化学实验室废水污染防治对策 总被引：2，自引：0，他引：2
随着环保意识增强,可持续和科学发展及绿色化学教育已是化学教育的重中之重。针对实验室废水的收集和处理,深刻剖析化学实验废水对环境的污染、危害及原因。提出了减少实验室废水排放和实验室废水污染防治对策:制订与完善专门法律法规;全面推行绿色化学思想,倡导绿色和清洁实验;落实和强化管理措施;加强本地区中心实验室功能;政府环保部门加强监控及指引;政府加大实验室废液处理投入。以期指导高校实验室建设和切实保护实验室周边环境。 相似文献
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赵津莹 《佳木斯教育学院学报》2011,(4):136-137
本文对高校实验室废水的来源、种类及特性进行了分类,对不同性质的实验室废水的处理方法进行了综合概述。同时以天津开发区职业技术学院生物技术及应用专业和食品检测与管理专业的实验室为例,论述了实验室废水从源头治理的办法,即尽量采用少量的药品,分类处理实验废水,力争建设绿色环保的高校实验室。 相似文献
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针对各中学化学实验室学生实验后产生大量的废水,对水管的安全性和城市污水的后续处理带来了很大的问题,本文对此进行了研究,并提出了处理方法,即先分析废水的化学成分,调整酸碱度后,进行化学沉淀、过滤和电解处理,设计了处理效果非常好的电渗析法,最后提出了一个完整的实验室废水处理流程图.旨在为以后的化学实验室建设、废水处理和回用提供一个参考方案,达到高效、环保、节约的目的. 相似文献
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张严 《Journal of Zhangzhou Technical Institute》2004,6(2):86-89
分析印染废水好氧生物处理工艺的剩余污泥作高浓度印染废水预处理的生物絮凝剂,并与粉煤灰协同作用的机理;对比不同实验条件下影响废水中化学需氧量、色度和悬浮物去除率的作用和因素;为减轻后续生化处理负荷、有效降低高浓度印染废水处理成本,探索废物资源化、以废物治理废水产业化的工艺设计方向和途径,提供合理的实验依据. 相似文献
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造纸废水主要包括黑液和中段废水,根据两者所含污染物的不同特性,分开处理,对症下药。黑液采用酸析法,使其中木质素沉淀析出;中段废水采用化学絮凝法,通过絮凝剂的中和和架桥作用,使带负电荷的短纤维素等胶体粒子脱稳沉降。通过上述处理,小造纸废水能够有效地得到净化,经济上小纸厂也能承受得了,这无疑为治理小造纸废水走出一条新路子。 相似文献
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倪文斌 《襄樊职业技术学院学报》2005,4(4):1-2,97
皂素废水具有浓度高、色度大、酸度大、治理难度大的特点。末端治理方案。运行成本高、治理费用大、一旦实施将造成巨大浪费。因此，皂素废水治理必须走综合利用的道路。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献