共查询到20条相似文献，搜索用时 500 毫秒
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等标污染负荷法在韶关市水环境污染源评价中的应用 总被引：1，自引：0，他引：1
通过分析统计韶关市各河流的点源和面源入河污染物的等标负荷,来确定韶关市水环境的主要污染源和主要污染物,进而对韶关市各水资源市级区和县级行政区的污染源进行评价,有针对性提出一些保护韶关市水环境、预防水污染的措施与建议. 相似文献
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曹世红 《吉林广播电视大学学报》2011,(11):68-70
长期以来,由于受两岸工业废水及城市生活污水的污染,图们江水环境质量很差,严重影响两岸城市生活用水及工业、农业、渔业、旅游业的正常发展。位于开山屯的延边晨鸣纸业有限公司是造成图们江有机质污染的主要污染源之一,经多年努力,通过技术改造和治理污染源,大幅度削减排污总量,于2007年6月全面实施达标排放。本文采用2007年图们江水质监测数据,结合污染源减排量分析,综合评价了重点污染源减排对图们江水质的影响。 相似文献
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刘新惠 《闽西职业技术学院学报》2002,(1):71-73
根据现状调查及主要污染源结构分析,新罗城区污水类型及主要污染源结构已发生了重大变化,城市污水已由工业废水为主的有机污染型转向城市生活污水和养殖业废水为主的有机物污染,氨氮、总磷污染,并据此提出了相应的控制对策。 相似文献
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用实地调研的方法获得承德市城乡结合部大气污染源类型及数据,结合相关统计资料,按照国家环保总局（环发[2003]64号）“燃料燃烧排放大气污染物物料衡算办法”进行计算。结果表明：承德市城乡结合部2013年主要大气污染源为烟尘、二氧化硫、一氧化碳、氮氧化物,分别占污染物排放总量的71.83%、3.04%、19.97%和5.61%。烟尘主要来自居民生活和建筑工地,分别占60.70%和39.30%。交通污染源中,氮氧化物排放量占交通污染源排放总量的54.44%,一氧化碳排放量占38.08%。抑制生活污染源的主要对策为改变生活方式减少煤炭燃烧量;交通污染源治理首先应推广汽车尾气处理装置,其次减少私家车的使用;加强建筑工地防尘处理。 相似文献
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《绵阳师范学院学报》2016,(11):79-83
对宜宾造纸厂的生产概况、废水处理工艺、实际运行参数等进行了调查,并应用等标污染负荷法分析和评价了废水处理效率、污染负荷和主要污染物,为废水处理工艺改进、污染物质控制提供参考.研究结果表明:工业废水处理后p H、SS、BOD_5的浓度均达到国家排放标准限值,CODcr、色度两项超标,去除效率分别为51%、63%,CODcr等标污染负荷比最大44%,即为主要污染物.提出了具体的改进污水处理工艺的措施. 相似文献
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郑菊珍 《闽西职业技术学院学报》2006,8(2):118-121
对汀江(长汀段)2000～2004年连续5年的水质监测数据进行了总结,分析了汀江水污染状况和污染特点及成因。结果表明,汀江水污染日趋严重,氨氮为首要污染物,养殖业污染为主要污染源。 相似文献
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郝明 《中学课程辅导(初三版)》2005,(8)
向水体排放或释放污染物的来源和场所,都称为水体污染源,这是造成水体污染的罪魁祸首,从不同角度可以将水体污染源进行分类。(1)按水体类型来分大气水污染源这主要是指污染物质进入大气对大气水分造成的污染,也就是污染物对降水的影响。大气水分对大气起清洁剂的作用,如果它受到污染,不仅使大气质量下降,对工农业生产形成直接的影响,而且,大气污染源 相似文献
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分析了大同市地面水污染状况、主要污染物、重点污染区域以及污染源和污染成因.结合经济转型、结构调整,提出了源头防污治污、过程治污及变废为宝等系列治理方案. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 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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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 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