简介：Thenon-isothermalleachingkineticsofprimarytitanium-richmaterialbymicrowaveheatingwasinvestigated,andthetemperature-pressurecurvesofleachingsystemandmicrowaveabsorptioncharacteristicsofmixturesolutionsbeforeandafterleachingweremeasured.Theresearchofnon-isothermalkineticswasevaluatedbytheleachingrateofFeandthetotalapparentvelocityequationofthenon-isothermalkineticsofleachingforprimarytitanium-richmaterialbymicrowaveheatingwasobtained.Itisshownfromthetemperature-pressurecurvesthatthehightemperatureandhighpressureofclosedleachingsystemarefavorabletotheenhancementoftheleachingrateofFe.Microwaveabsorptioncharacteristicsofmixturesolutionsbeforeandafterleachingshowthatthereareabruptchangesofmicrowaveabsorptioncharacteristicsfor15%HClsolutionandthemixturesolutionafterleachingby20%HCl.

简介：Soil,cropandresidents'hairoverXiaoqinlinggoldminingregion,China,whichwasselectedasacasestudy,weresampledandanalyzedforHg,Cd,Pb,Cu,Cr,AsandZnconcentrations.Theconcentrationsofheavymetalsinsoilorcropandhairsampleswereusedtoassesstheirpotentialecologicalrisks,ortofindtheresponsestothesemetalsasevidencestoprovethepotentialriskwascomingdowntoobservedharm,respectively.Theresultsshowedthat,thesemetalsinsoilwererankedbyseverityofecologicalriskasHg>Cd>Pb>Cu>Cr>As>Zn,basedontheirsingle-elementindexes.Intheviewofthepotentialecologicalriskindexes,ofallsoilsamples,abouthalfhadsignificantlyhighorhighpotentialecologicalrisk,whichcoveredmorethan74%ofthestudiedregion.Mostoftheriskswere97.41%fromHg,PbandCd,especially,84.37%fromHg.Boththesingle-elementandpotentialecologicalriskindexesindicatedthat,theecologicalriskgradeshadaspecialspatialcharacteristic,andincreasedfromnorthwesttosoutheastgenerally.Thiswasagreedwiththespatialdistributionofthestrengthingoldminingactivitiesoverthestudiedregion.TheconcentrationsofHgandPbwerehigherthantheirrelativebackgroundsinthecorps,andwereeven9.48and25.09timeshigherthantheirrelativebackgroundsinresidents'hair,respectively.Alltheseshowedthattheheavymetalsinthesoilhadahighpotentialecologicalrisk,especially,hadbeenaffectingthesecrops'growingandyield,andeventheresidents'healththroughfoodstrains.Obviously,thesemetals'potentialecologicalharmhadbeencomingdowntoobservedharmtotheecology.

简介：树突的微观结构规模例如主要、第二等的树突手臂间距，在interdendritic区域以内控制分离侧面和第二等的阶段的形成，它决定团结的结构的性质。主要阶段的主要、第二等的树突手臂间距上的调查在这研究在方向性地团结的Pb-26wt%Bi低亚硫酸钠包晶体的合金期间被执行，并且系统的研究与不同直径用圆柱的样品被进行(=1.8和7.0公里)武装间距以便在主要、第二等的树突上分析样品直径的效果。在这个工作，生长速度上的树突手臂间距的依赖被建立。另外，有关主要、第二等的树突手臂间距的试验性的数据与从文学的主要预兆的树枝状的模型相比。在1.8-mm-diameter样品和7.0-mm-diameter样品的树突手臂间距的试验性的结果之间的比较也被进行。