A model for the evolution in water chemistry of an arsenic contaminated aquifer over the last 6000 years, Red River floodplain, Vietnam [0.03%]
越南红河冲积层过去六千年砷污染含水层水质演化概念模型研究
Dieke Postma,Pham Thi Kim Trang,Helle Ugilt Sø et al.
Dieke Postma et al.
Aquifers on the Red River flood plain with burial ages ranging from 500 to 6000 years show, with increasing age, the following changes in solute concentrations; a decrease in arsenic, increase in Fe(II) and decreases in both pH, Ca and bica...
Adsorption and desorption of arsenic to aquifer sediment on the Red River floodplain at Nam Du, Vietnam [0.03%]
红河泛滥平原南杜地区砷在含水层沉积物中的吸附与解吸
Nguyen Thi Hoa Mai,Dieke Postma,Pham Thi Kim Trang et al.
Nguyen Thi Hoa Mai et al.
The adsorption of arsenic onto aquifer sediment from the Red River floodplain, Vietnam, was determined in a series of batch experiments. Due to water supply pumping, river water infiltrates into the aquifer at the field site and has leached...
Magnesium and 54Cr isotope compositions of carbonaceous chondrite chondrules - Insights into early disk processes [0.03%]
碳质球粒陨石球粒的镁和54Cr同位素组成-对早期盘过程的认识
Mia B Olsen,Daniel Wielandt,Martin Schiller et al.
Mia B Olsen et al.
We report on the petrology, magnesium isotopes and mass-independent 54Cr/52Cr compositions (μ54Cr) of 42 chondrules from CV (Vigarano and NWA 3118) and CR (NWA 6043, NWA 801 and LAP 02342) chondrites. All sampled chondrules are classified ...
Accretion timescales and style of asteroidal differentiation in an 26Al-poor protoplanetary disk [0.03%]
低₂⁶Al贫乏的原行星盘中的 asteroidal 辨异的时间尺度和方式
K K Larsen,M Schiller,M Bizzarro
K K Larsen
The decay of radioactive 26Al to 26Mg (half-life of 730,000 years) is postulated to have been the main energy source promoting asteroidal melting and differentiation in the nascent solar system. High-resolution chronological information pro...
Stability constants for the formation of lead chloride complexes as a function of temperature and ionic strength [0.03%]
温度和离子强度对铅氯化物复合物形成稳定常数的影响
Yanxin Luo,Frank J Millero
Yanxin Luo
The stability constants for the formation of lead (Pb2+) with chloride [Formula: see text] have been determined using a spectrophotometric method in NaClO4 solutions as a function of ionic strength (0-6 m) and temperature (15-45 °C). The r...
Reduction of hexavalent chromium by the thermophilic methanogen Methanothermobacter thermautotrophicus [0.03%]
甲基嗜热菌(Methanothermobacter thermautotrophicus)将六价铬还原
Rajesh Singh,Hailiang Dong,Deng Liu et al.
Rajesh Singh et al.
Despite the significant progress on iron reduction by thermophilic microorganisms, studies on their ability to reduce toxic metals are still limited, despite their common co-existence in high temperature environments (up to 70°C). In this ...
Experimental chlorine partitioning between forsterite, enstatite and aqueous fluid at upper mantle conditions [0.03%]
俯冲带地幔高温高压条件下橄榄石、单斜辉石-水的氯分异实验研究
Alessandro Fabbrizio,Roland Stalder,Kathrin Hametner et al.
Alessandro Fabbrizio et al.
Cl partition coefficients between forsterite, enstatite and coexisting Cl-bearing aqueous fluids were determined in a series of high pressure and temperature piston cylinder experiments at 2 GPa between 900 and 1300 °C in the system MgO-Si...
Evidence for nucleosynthetic enrichment of the protosolar molecular cloud core by multiple supernova events [0.03%]
多重超新星事件富集原太阳分子云核心的核合成证据
Martin Schiller,Chad Paton,Martin Bizzarro
Martin Schiller
The presence of isotope heterogeneity of nucleosynthetic origin amongst meteorites and their components provides a record of the diverse stars that contributed matter to the protosolar molecular cloud core. Understanding how and when the so...
Surficial weathering of iron sulfide mine tailings under semi-arid climate [0.03%]
半干旱气候下铁硫化物尾矿的表生风化过程研究
Sarah M Hayes,Robert A Root,Nicolas Perdrial et al.
Sarah M Hayes et al.
Mine wastes introduce anthropogenic weathering profiles to the critical zone that often remain unvegetated for decades after mining cessation. As such, they are vulnerable to wind and water dispersion of particulate matter to adjacent ecosy...
Assessing amino acid racemization variability in coral intra-crystalline protein for geochronological applications [0.03%]
评估珊瑚晶体蛋白质氨基酸变旋变异性的可变性以进行地层学应用
Erica J Hendy,Peter J Tomiak,Matthew J Collins et al.
Erica J Hendy et al.
Over 500 Free Amino Acid (FAA) and corresponding Total Hydrolysed Amino Acid (THAA) analyses were completed from eight independently-dated, multi-century coral cores of massive Porites sp. colonies. This dataset allows us to re-evaluate the...