建隐患排查治理长效机制

山西大同煤矿集团有限责任公司（以下简称“同煤集团”）的前身是成立于1949年8月30日的大同矿务局,2000年以来经过公司制改造和联合重组,成为地跨山西省大同、朔州、忻州3市39个县区,拥有6157km^2煤田、892亿t总储量、405亿元总资产、44对矿井、70万职工家属、年产运能力上亿吨的特大型煤炭能源集团。     

Preparation, characterization, and photocatalytic activities of boron- and cerium-codoped TiO2

Boron- and cerium-codoped TiO2 photocatalysts were synthesized using modified sol-gel reaction process and characterized by X- ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, particle size distribution （PSD）, diffuse reflectance spectra （DRS）, and Brunauer-Emmett-Teller （BET）. The photocatalytic activities were evaluated by monitoring the degradation of dye Acid Red B （ARB）. The results showed that the prepared photocatalysts were mixed oxides mainly consisting of titania, ceria, and boron oxide. The structure of TiO2 could be transformed from amorphous to anatase and then to rutile by increasing calcination temperature; the transformation being accompanied by the growth of particle size without any obvious change in phase structure of CeO2. The XPS of B1.6Ce1.0-TiO2 prepared at 500℃ showed that a few boron atoms were incorporated into titania and ceria lattice, whereas others existed as B2O3. Cerium ions existed in two states, Ce^3＋ and Ce^4＋, and the atomic ratio of Ce^3＋/Ce^4＋ was 1.86. When boron and cerium were doped, the UV-Vis adsorption band wavelength showed an obvious shift toward the visible range （〈526 nm）. As the atomic ratio of Ce/Ti increased to 1.0, the absorbance edge wavelength increased to 481 nm. The absorbance edge wavelength decreased for higher cerium doping levels （Ce/Ti=2.0）. The particles size ranged from 122 to 255 nm with a domain at 168 nm （39.4%）. The degradation of ARB dye indicated that the photocatalytic activities of boron- and cerium-codoped TiO2 were much higher than those of P25 （a standard TiO2 powder）. The activities increased as the boron doping increased, whereas decreased when the Ce/Ti atomic ratio was greater than 0.5. The optimum atomic ratio of B/Ti and Ce/Ti was 1.6 and 0.5, respectively.     

四川省消防安全责任制实施办法出台 乡镇要建立消防安全组织

近日,四川省政府办公厅印发《四川省消防安全责任制实施办法》(以下简称《办法》)。《办法》进一步压紧压实了各级各部门消防安全责任,是该省坚持党政同责、一岗双责、齐抓共管、失职追责原则,进一步健全落实消防安全责任制的实际行动。《办法》共6章24条,现已正式施行。     

饮用水原水中微量阿特拉津去除方法试验研究

饮用水中微量有机物的污染是关系饮用水生态安全的重要问题。以饮用水中微量的内分泌干扰类除草剂阿特拉津为研究对象,分别采用微生物降解技术和光催化氧化技术对其进行降解,考察温度对阿特拉津降解效果的影响。研究结果表明：阿特拉津浓度为1 mg/L时,3种温度条件下,除锰功能菌MB4对阿特拉津均有明显的去除效果,降解时间为7 d时,阿特拉津的去除率达到65%。底物浓度为200 μg/L,3种温度条件下,活性炭负载二氧化钛（TiO₂/PAC）催化剂光降解阿特拉津30 min时,其去除率均达到90%。光催化氧化技术协同微生物降解技术在饮用水中微量的内分泌干扰物的去除中有广阔的应用前景。     

TRMM卫星资料对陕西及周边地区夏季降水的探测

采用2002～2006年夏季6～8月热带降水测量（TRMM）卫星3841RT类数据资料,以发生在陕西及周边地区的连阴雨、暴雨和日降水量序列事件为例,通过比较TRMM卫星降水资料与地面气象站观测资料的差异,分析了TRMM卫星对陕西及其周边地区夏季降水过程的探测能力。结果说明TRMM卫星反映的陕西及周边地区夏季降水量值偏小,但探测结果能够大致表现陕西关中和陕南及同纬度周边地区夏季降水量的基本特征,对陕西北部地区夏季降水量的探测能力较差。     

常熟市系统性推进城市安全发展

常熟作为苏南经济先发地区之一,经济社会得到快速发展。但与此同时,受限于城市空间、传统产业结构等实际,城市发展面临越来越大的安全生产压力。为此,常熟始终坚持安全发展理念,认真贯彻“安全第一,预防为主,综合治理”方针,不折不扣落实“党政同责、一岗双责、齐抓共管、失职追责”要求,坚持依法监管、源头防范、系统治理,全市安全生产形势持续平稳好转。     

Photocatalytic degradation of the dye sulforhodamine-B： A comparative study of different light sources

The photocatalytic degradation of dye pollutant sulforhodamine-B （SRB） in aqueous titanium dioxide （TiO2） dispersions was examined under three lighting regimes： UV light （330 nm〈λ〈 380 nm）, sunlight, and visible light （λ〉450 nm）, all investigated at pH=2.5. Total organic carbon （TOC） and chemical oxygen demand （CODer） assays show that the degradation rate of SRB is much higher when irradiated with UV and sunlight compared with visible light. The temporal concentration changes of SRB illustrated a first-order reaction and the rate constant, k, is 0.197 min^-1, 0.152 min^-1, 0.027 min^-1, respectively, under the three lighting conditions. The final mineralized products were amine compounds identified by infrared spectrophotometry. When irradiated with visible light, the photocatalytic degradation rate could be improved by lowering the H2O2 concentration and inhibited by increasing the H2O2 concentration, but results contrary to the above were obtained when UV light was used for irradiation.     

300 Mvar级大型同步调相机工程特性探析

本文以300Mvar级大型同步调相机工程为研究对象,通过介绍国内外同步调相机的概况,分析同步调相机工程的环境影响特性,结合同步调相机工程周边环境的实地测量与调查,提出此类工程在环境保护方面应关注的要点和对策建议.     

东北森林土壤动物同功能种团及其生态分布

对位于小兴安岭的东北林业大学凉水自然保护区和位于张广才岭的东北林业大学帽儿山实验林场的土壤动物进行了研究。结果表明,该地区土壤动物可划分为腐食性、植食性,捕食性动物三个同功能种团,土壤动物各同功能种团在组成、个体数量、生物量等方面均具有相对稳定性,群落土壤动物同功能种团的数量分布状况能在很大程度上反映群落环境的相似与差异程度;群落中各土壤动物同功能种团的个体数量间无明显的相关性,但腐食性动物与捕食性动物两个同功能种团的生物量之间具有的相关性。图1表2参13     

同煤集团召开采煤安全质量标准化现场会暨生产例会

本刊讯4-月21日,大同煤矿集团公司（以下简称同煤集团）采煤安全质量标准化现场会暨生产例会在地方煤炭有限责任公司姜家湾煤矿召开。