天津市七里海湿地土壤地球化学特征及生态环境意义研究

以七里海湿地为研究对象,通过表层土壤元素含量变化和元素间的相关关系,运用R型聚类分析方法,对指标组合特征进行分析,以相关系数0.35划分,分为3个指标组合,土壤中元素的积累以非生物积累为主.探讨了湿地土壤元素分布分配的地球化学规律.通过湿地的环境变化对土壤元素含量变化的影响,表层土壤有机碳、总氮以及碳氮比的研究,表明七里海湿地土壤有机碳含量和总氮的含量高度呈正相关,相关系数R达到0.95,有机碳和总氮的含量分布特征也很相似.从地球化学角度,分析了七里海湿地的生态环境作用.     

扬子型铜矿床矿物稀土元素地球化学

本文较系统研究了扬子型铜矿床中有代表性的菱铁矿、胶黄铁矿、黄铁矿、磁黄铁矿、磁铁矿、黄铜矿及部分脉石矿物的稀土元素组成及特征，总结了展状矿石中和矽卡岩矿石中矿物稀土元素组成的特点及二者之间存在的明显差别，从一个方面探索扬子型铜矿床的成因。     

Residual dynamics of thiacloprid in medical herbs marjoram, thyme, and camomile and in soil

Thiacloprid is a new insecticide of the chloronicotinyl family. To assess its risk after application, residual characteristics of thiacloprid in marjoram, thyme, and camomile and in soil were studied under field conditions. The active ingredient was extracted from the plant material using a mixture of acetone-water. After filtration, the extract was concentrated to the aqueous phase, diluted with water, and portioned against ethyl acetate on a matrix solid phase dispersion column. Thiacloprid was extracted from soil using a mixture of methanol-water, filtered, and re.extracted （clean up） with dichloromethane. The residues were quantified using HPLC-MS-MS. The methods were validated by recovery experiments. Thiacloprid residues in marjoram, thyme, and camomile and in soil persisted beyond 10, 14, 14, and 21 d but no residues were detected after 14, 21, 21, and 28 d, respectively. The data obtained in this study indicated that the biexponential model is more suitable than the first-order function to describe the decline of thiacloprid in fresh marjoram, fresh thyme, and dried camomile flowers with half-life （t1/2） of 1.1, 0.7, and 1.2 d, respectively. However, both the first-order function and biexponential model were found to be applicable for dissipation of thiacloprid in soil with almost the same t1/2 values of 3.5 and 3.6 d. The results indicated that thiacloprid dissipates rapidly and does not accumulate in the tested herbs and in soil.     

贵州水城青山铅锌矿床地球化学研究

通过对青山铅锌矿床矿石矿物、蚀变围岩、含矿层、辉绿岩的稀土元素、硫、碳、氧同位素及黔西北岩石地层中铅锌含量的研究，笔者认为，成矿金属并非源于岩浆岩，而源于深部的沉积岩，碳、硫分别源于碳酸盐岩和含矿地层的硫酸盐硫；大气降水经深循环再上升形成成矿介质水。     

江西华齐铜多金属矿区含矿硅质岩的地球化学特征及成因探讨

矿产远景地质调查过程中,在江西华齐铜多金属矿区发现含矿硅质岩.测试分析显示,区内硅质岩贫Al2O3、TiO2,Co、Cr等元素含量低,贫∑REE,δ(Eu)为负异常,δ(Ce)为弱正异常,HREE相对富集等热水沉积物的特征.在判别硅质岩形成的系列图解上,样品均指示热水沉积作用和大陆边缘环境,这与SiO2/Al2O3、SiO2/(K2O+Na2O)、SiO2/MgO、MnO/TiO2、K/Rb等特征值所指示的结果相一致.本区硅质岩地球化学特征及其对比结果说明该区域构造演化的复杂性.在元古代华南海槽构造演化中在华夏地块边缘发生断裂拉张,形成断陷盆地,并发生了热水喷流沉积成岩成矿作用.本区硅质岩与成矿关系密切,研究硅质岩对于认识区域构造演化及寻找矿化体具有重要意义.     

若干典型岩性区域沉积物金属元素地球化学特征比较研究

研究了４种成片分布的典型岩性（页岩、石灰岩、花岗岩、黄土）区域沉积物金属元素（Ｌｉ、Ｎａ、Ｋ、Ｃａ、Ｓｒ、Ｂａ、Ｔｉ、Ｖ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｚｎ、Ａｌ等共１６种）总量与形态特征．结果表明：这４种岩性区域沉积物金属元素含量与形态均有显著的差别．与其它岩性相比，黄土地区易迁移元素含量高，而重金属含量显著较低；其金属元素残渣态含量高，而有机态、铁锰氧化物态和可交换态含量低．石灰岩地区重金属含量较高，而易迁移元素如Ｎａ，Ｓｒ等含量则较低；其重金属元素残渣态含量不偏低，表明经风化作用释放出来的重金属参与了次生矿物的形成过程而得以富集．花岗岩地区重金属含量居中，而Ｆｅ和Ａｌ含量较高；其金属元素残渣态含量不偏高则与风化作用较强有关．页岩地区元素含量与形态均居中，代表了各种岩性的平均水平．     

医疗废物管理信息系统的设计与开发研究

结合医疗废物无害化处理的运作管理,分析了医疗废物管理信息系统的数据流程,进行了系统设计,最终建立了长春市医疗废物管理信息系统,并阐述了该系统实现的主要技术特点。该系统利用条形码技术、GPS(全球卫星定位系统)、GPRS(General Packet RadioService)、在线监测等信息技术实现了对医疗废物的装载、运送、核实、焚烧、残渣处理的全程数字化跟踪管理。     

升温速率对医疗垃圾热解机理的影响

用TGA-DTA差热失重联用分析仪研究升温速率对输液瓶、一次性医用手套、敷料内心和白鼠肌肉4种典型医疗垃圾热解过程的影响规律.结果表明:在其他试验条件都相同的情况下,随着升温速率的提高,热解反应起始温度、终止温度、峰温升高,反应区间ΔT变宽,发生最大热失重速率的温度也升高,热失重峰的峰高也随之增加;升温速率对热失重率的影响随医疗垃圾种类而不同,对较难分解的医疗垃圾（如敷料内心和白鼠肌肉等）影响大,对容易分解的医疗垃圾（如输液瓶和一次性医用手套等）影响较小.      

Using a novel data linkage approach to investigate potential reductions in motor vehicle crash severity – An evaluation of strategic highway safety plan emphasis areas

Introduction: With the significant number of motor-vehicle fatalities occurring on the nation’s roadways in recent years, there exists a need to integrate a more complete range of data sources, available at a regional or statewide level, to effectively evaluate existing safety concerns and quantify their impacts. Crash data alone does not provide ample crash-associated citation, injury, and roadway characteristics; therefore, a more cohesive dataset is required to accurately and completely analyze the true impacts of motor-vehicle crashes. Previously developed strategies linked crash data with citation and roadway inventory data to enhance the identification and optimization of highway safety strategies. Method: The main objective of this research focused on developing a new deterministic linkage between crash and Emergency Medical Services (EMS) data, by utilizing the Massachusetts Crash Data System (CDS) and the Massachusetts Ambulance Trip Record Information System (MATRIS). Results: After several iterations of match criterion, the validated linkage successfully matched 58.3% of MATRIS records (containing an Injury Cause of Motor Vehicle Crash) to a CDS person record (55011 linked pairs, between 2014 and 2016). The data linkage provided significant insight into injury trends in several highway safety emphasis areas such as roadway departure, speeding-related, and distraction-affected crashes. The findings from this research are twofold: (1) an established process for linking previously separate data sets, and (2) a mechanism for analysis that provides decision-makers and safety professionals with a better measure of crash outcomes.     

老万场金矿及其外围水系沉积物元素地球化学特征

为揭示晴隆县老万场金矿及其外围水系沉积物的元素组成和富集情况与矿体的关系 ,将老万场金矿矿样、矿区水系沉积物、矿区外围不同异常范围内水系沉积物的元素平均值及全省的水系沉积物背景值进行了比较 ,发现老万场金矿水系沉积物与老万场金矿矿样具有相同的元素组合及富集趋势。