相山矿田铀的中和还原成矿作用”

该文以相山矿田为例介绍了铀的中和还原成矿作用的概念和机理。     

保险粉-H2O2对棉布脱色的实验研究

常用的次氯酸脱色法是在酸性条件下用次氯酸或次氯酸钠对棉布进行处理。实验研究用保险粉-H2O2多段脱色法对棉布进行脱色。保险粉处理段是在保险粉溶液中添加NaHCO3作缓冲剂，加热沸腾40min对棉布进行处理，H2O2则是在碱性H2O2溶液中，添加NaSiO3作添加剂，使棉布加热沸腾30min。与次氯酸脱色法相比，不仅脱色后的棉布强度没有减弱，而且脱色效果能达到或接近次氯酸法的脱色效果。同时脱色后的废水中不含有机氯化物，避免了致癌物质的产生。     

墨西哥湾盐下远景区勘探回顾

墨西哥湾异地盐下深水砂岩油藏的勘探给北美展示了一个新的油气勘探远景区。至今针对盐下目标已钻了３０多口井,８口井（据下文应为７口井－译注）获得了发现,其中至少有３口井获得工业油气流,另３口井有１亿桶以上储量。     

库捷尔太铀矿床干酪根特征研究

在研究砂岩型铀矿床时，可以发现铀与有机质之间有着密切的关系。本文以伊犁盆地库捷尔太铀矿床为例，介绍了该矿床的基本特征，研究了该矿床中干酪根的主要组分、反射率、热解色谱分析等特征。认为研究区含矿岩系中有的有机质属中间过渡型，其原始母质为陆生高等植物，为判别有机质与铀成矿之间的关系提供了重要信息。     

Model parameters for simulating fate and transport of on-site wastewater nutrients

This paper presents a critical review of model-input parameters for transport of on-site wastewater treatment system (OWS) pollutants. Approximately 25% of the U.S. population relies on soil-based OWS for effective treatment and protection of public health and environmental quality. Mathematical models are useful tools for understanding and predicting the transport and fate of wastewater pollutants and for addressing water-budget issues related to wastewater reclamation from site to watershed scales. However, input parameters for models that simulate fate and transport of OWS pollutants are not readily obtained. The purpose of this analysis is to illustrate an objective, statistically supported method for choosing model-input parameters related to nitrogen (N) and phosphorus (P). Data were gathered from existing studies reported in the literature. Cumulative frequency distributions (CFDs) are provided for OWS effluent concentrations of N and P, nitrification and denitrification rates, and linear sorption isotherm constants for P. When CFDs are not presented, ranges and median values are provided. Median values for model-input parameters are as follows: total N concentration (44 mg/L), nitrate-N (0.2 mg/L), ammonium (60 mg/L), phosphate-P (9 mg/L), organic N (14 mg/L), zero-order nitrification rate (264 mg/L/d), first-order nitrification (2.9/d), first-order dentrification (0.025/d), maximum soil capacity for P uptake (237 mg/kg), linear sorption isotherm constant for P (15.1 L/kg), and OWS effluent flow rates (260 L/person/d).     

鄂尔多斯盆地东北部砂岩型铀矿成矿机理和叠合成矿模式

文章从铀的来源、迁移和沉淀富集等方面论述了鄂尔多斯盆地东北部砂岩型铀矿成矿机理，提出了该铀矿化氧化还原-油气还原-热改造多重作用叠加的“叠合铀成矿模式”。