CO3O4/介孔分子筛催化剂对苯催化完全氧化的研究

分别以介孔分子筛MCM-41、MCM-48、SBA-15为载体,采用等体积浸渍法制备了氧化钴/介孔分子筛催化剂,利用N2吸附、X射线衍射、程序升温还原等技术对催化剂进行了表征,考察了Co3O4的负载量及载体的孔结构对催化剂完全催化氧化苯的性能的影响.结果表明,Co3O4的负载量为20%时,催化剂的催化活性最好;载体的孔径和催化剂的可还原性能是影响催化活性的主要因素,催化剂活性顺序为Co3O4/SBA-15>Co3O4/MCM-41>Co3O4/MCM-48.     

潍坊市滨海开发区人群血清中溴代阻燃剂浓度水平的时间变化趋势

本研究以溴系阻燃剂生产源区潍坊市滨海开发区作为研究区域,对潍坊市人群血清中PBDEs和NBFRs的浓度水平分布及时间变化趋势进行了分析.潍坊市人群血清样本中的PBDEs浓度(100.52-795.62 ng·g-1 1w(lipid weight,脂重),2016年;85.55-913.12 ng·g-1 1w,201...     

OH自由基引发光氧化氟氯碳化合物的研究

研究了ＣＦＣ－１１＋Ｈ２Ｏ２，ＣＦＣ－１１＋Ｈ２Ｏ２＋Ｏ２，ＣＦＣ－１２＋Ｈ２Ｏ２和ＣＦＣ－１２＋Ｈ２Ｏ２＋Ｏ２４个体系的光化学反应，这些体系在低压尔照射下，Ｈ２Ｏ２产生了ＯＨ自由基，ＯＨ自由基能引发ＣＦＣ的光氧化反应，其产物在２０ｍ长的漪避用富叶红外光谱仪测量，发现在ＣＦＣ－１１＋Ｈ２Ｏ２和ＣＦＣ－１１＋Ｈ２Ｏ２＋Ｏ２体系中有ＣＯＦＣｌ，ＣＯ２和ＨＣｌ，而在ＣＦＣ－１２＋Ｈ２Ｏ２和ＣＦＣ－１２＋     

北京地区电镀项目环境保护验收特点及验收监测关键环节研究

北京市的电镀企业规模小,污染很大。根据建设项目竣工环境保护验收规范要求,针对北京市电镀项目环保验收特点,作者总结了此类项目验收的工作重点,提出废水、废气与固体废物并重、污染物浓度排放及总量排放兼顾的实施方案。除此以外,文章还具体介绍了在电镀项目的环保验收中怎样结合环保管理部门的要求,进行废气、废水的现场监测及固体废物处置、环境管理检查等工作。本文不仅能为环境管理部门提供管理、规范电镀行业污染的有效方法,同时,也对电镀企业提高其污染治理和资源综合利用水平指明了方向,大大促进了电镀产业逐渐向环境友好型产业发展,最终实现电镀无害化的发展目标。     

Levels, sources and health risks of carbonyls and BTEX in the ambient air of Beijing, China

The atmospheric concentrations of carbonyls and BTEX (benzene, toluene, ethylbenzene, m,p-xylene and o-xylene) were measured simultaneously at a same sampling site in Beijing from September 2008 to August 2010. The average concentrations of the total measured carbonyls during autumn, winter, spring, and summer were 37.7, 31.3, 39.7, 50.5 μg/m³, respectively, and maximal values for their diurnal variations usually happened at noontime. In contrast to carbonyls, the average concentrations of the total measured BTEX during the four seasons were 27.2, 31.9, 23.2, 19.1 μg/m³, respectively, and minimal values for their diurnal variations always occurred in the early afternoon. The average concentration for carbonyls increased about 24% from September 2008-August 2009 to September 2009-August 2010, for BTEX, increased about 15%. Integrated life time cancer risks for three carcinogens (benzene, formaldehyde and acetaldehyde) in Beijing exceeded the value of 1E-06, and the hazard quotient (HQ) of non-cancer risk of exposure to formaldehyde exceeded unity.     

超临界水氧化法处理除草剂生产废水及热能的研究

利用 2 .2 L +1.7L超临界水氧化反应器对除草剂生产废水进行了处理实验。结果表明 :在温度 >60 0℃、压力 >3 2MPa,氧化反应时间为 180 s时 ,其 COD去除率达 98.1% ;氧化反应时间为 3 0 0 s时 ,其 COD去除率达 99.8%。处理后的排水达到国家规定的标准。同时利用氧弹法对该废水热值进行了测试 ,利用热平衡方程式对该试验装置的热效率进行了分析     

The relationship between chemical elements in soil and whole blood,and fluorosis induced by coal-fired pollution

To study the relationship between chemical elements in soil and whole blood, and fluorosis induced by coal-fired pollution, ecological and case–control studies were carried out. We determined the concentrations of 11 chemical elements and pH values in soil in two fluorosis-affected counties in Chongqing, China, and analyzed the correlation between these values and prevalence of dental fluorosis. Ni, I, F, Hg, and pH values positively correlated with fluorosis prevalence (P?<?0.05); these soil parameters may be related to coal-fired pollution fluorosis. Cu, Zn, Ca, Mg, and Fe concentrations in whole blood, and fluoride levels in urine of residents in epidemic and non-epidemic areas were determined. Cu, Zn, Mg, and Fe levels of the children in the case group were lower than those of the children in the external control group; urine fluoride level in the children in the case group was higher than that of the children in the internal and external control groups (P?<?0.05). The levels of Mg, Fe, and urine fluoride were higher in the case adult group than in the internal adult control group (P?<?0.05). Anti-fluoride elements were deficient in endemic areas.     

Copper-algae interactions: Inheritance or adaptation?

This study evaluated the responses of wild, adult plants of Enteromorpha compressa, and their progeny, to various copper concentrations. Experiments were designed to test the hypotheses that: 1) individuals of E. compressa from Caleta Palito, a copper-enriched coastal locality, tolerate higher copper concentrations than those from a place with no history of copper pollution and 2) such copper tolerance is under genetic control and therefore, was an inherited character. Our results indicate that algae which inhabit a copper-enriched environment tolerate higher concentrations of copper than those from waters with low copper concentrations. On the other hand, our results suggest that generalizations regarding heritability of the tolerance to copper do not apply to the Chilean E. compressa, as no differences in growth or rhizoid production were found between the progeny from Caleta Palito and Caleta Zenteno. These findings are an indication that heritability and adaptation may represent alternative strategies used by different populations of the same algal species to tolerate copper.     

前寒武纪基性岩墙群的地球化学特征与岩石成因讨论

基性岩墙群广泛出现在全世界前寒武纪地盾中 ,它的发育往往与区域性伸展构造环境有关 ,并可能与地幔柱有密切联系。前寒武纪出现的基性岩墙群以拉斑玄武质占绝对优势 (>80 % ) ,但在新太古代—古元古代高Mg的苏长质组分和苦橄质岩石也占重要位置 ,碱性岩类则相当稀少 ;而在新元古代碱性岩墙则变得很重要。基性岩墙群总体以富集LREE和大离子亲石元素为特征 ,其中在苏长岩中更为富集。基性岩墙群的岩浆有多种来源 ,其中苏长质岩浆主要来源于太古宙的陆下岩石圈 ,而拉斑玄武质岩浆多来源于主要由主体地幔组分 (PREMA)构成的地幔柱。地壳混染总体说来不是造成基性岩墙同位素及地球化学特征的主要机制。     

评价甲基环戊二烯基三羰基锰(MMT)抗爆剂

评述了抗爆剂甲基环戊二烯基三羰基锰（MMT）研究和应用的最新进展。MMT的合成工艺简单，抗爆能力优良，燃烧沉积物易于清除，不会堵塞尾气催化净化剂，毒性较小，环境安全性高，可替代四乙基铅作为抗爆剂。