本次研究采集不同孔位、不同深度的干热岩样品,同一样品又在不同温度下基于稳态平板法测试原理,在热面加入稳定的热面温度,热量通过试样传递到冷面,测量传递的热流,再根据试样的厚度和传热面积可计算导热系数和热阻,为提高干热岩换热效率、遴选干热岩最佳换热段提供环境参数依据.

我国页岩气开发仅处于理论研究阶段,但面对强劲的开发势头,提前开展相关问题研究十分必要；根据国外页岩气开发的工程经验,结合我国地质条件从页岩气勘探开发的工程特点入手,分析其可能产生的环境影响问题,并提出页岩气工程环境影响研究方向和评价体系,为我国页岩气开发工程的可持续发展提供科学参考.

Selenium in soil collected from Haidong region of QingHai Province was determined by AFS.The experimental results show that the recovery(n=7) is 97.9%—99.7%,and the RSD (n=7) is 1.03%—1. 72%.Experiments show that the established method is simple,fast,high precision to meet the requirements of determination of selenium in the soil.

以电感耦合等离子体发射光谱法(ICP-OES)测定青海省海东地区主要农产品中10种元素含量.方法的回收率在96.4％-101.3％之间,相对标准偏差0.90％-2.98％之间(n=7).实验证明,建立的方法简单快速,精密度高,满足对农产品中微量元素的监测要求.

Potassium extracting process from potash feldspar by fused sodium chloride and calcium chloride was studied.The results show that the optimal reaction conditions corresponded to different solvent and the reaction temperature change from 850℃ to 1 000℃.The quality ratio of sodium chloride and calcium chloride to potash feldspar are 1.5 and 1.9 respectively.This study will provide fundamental data for the extracting potassium from insoluble potash ore.