Metal concentrations during operation of a Permeable Reactive Barrier containing zero-valent iron.

The dataset consists of field solution metal concentrations for a new sequence of material installed within an existing permeable reactive barrier at the Casey Station Main Powerhouse. Three Excel files from ICP analysis are included.1. The limit of quantification and certified reference material results from 2013/142. Field sample results from 2012/133. Field sample results from 2013/14The barrier was originally constructed in the 2005/06 summer for details refer to (Mumford et al., 2013). The reactive gate consists of five modified Australian Antarctic Division cage pallets with external dimensions 1.8 x L 1.1 W x 0.75 H m.During the 2012/13 field season, media in the fifth cage was replaced with a new trial media sequence (Statham draft publication). Refilling occurred on the 16th of January. In this process mixed media sequences were homogenised by a cement mixer in 40 L batches and then placed in the PRB cage.Samples for metal concentration analysis collected six times over each of the 2012/13 and 2013/14 summer seasons. Samples were drawn from the lowest unfrozen depth of each multiport in cage 5. To minimise collection interference the procedure started at the most downstream multiport and continued upgradient. From each port two 30 mL samples were drawn, the first was filtered to 0.45 microns, the second was used to measure pH, Eh and EC readings. All samples were acidified (pH less than 2 using nitric acid) and frozen for storage and transport to Australia.Element concentrations and analysed by inductively couple plasma-optical emission spectroscopy (ICP-OES) using a Varian 720-ES spectrometer at the Australian Antarctic Division. The emission intensity of standards and sample solutions was measured following 1:1 in-line mixing with a solution of 0.75% (w/v) CsCl matrix modifier in 10% (v/v) HNO3 containing 5 mg L-1 yttrium as an internal standard. It was deemed unnecessary to use a matrix modifier for the 2014 analysis.

该数据集包含Casey站主发电站现有渗透反应墙（permeable reactive barrier, PRB）内新装的一组新型材料的现场溶液金属浓度数据，内含3份电感耦合等离子体（Inductively Coupled Plasma, ICP）分析的Excel文件：
1. 2013/14年度的定量限（limit of quantification）与有证标准物质（certified reference material）检测结果
2. 2012/13年度现场样品检测结果
3. 2013/14年度现场样品检测结果

该反应墙最初建于2005/06年度夏季，详细信息参见（Mumford等，2013）。反应闸门由5个经改造的澳大利亚南极局（Australian Antarctic Division）笼式托盘组成，外部尺寸为长1.8m×宽1.1m×高0.75m。

2012/13年度野外季期间，第5个笼中的介质被替换为新的试验介质序列（Statham待发表文稿）。填充作业于1月16日进行，过程中混合介质序列以40升批次通过混凝土搅拌机均质化后装入PRB笼。

2012/13和2013/14年度夏季各采集6次金属浓度分析样品。样品取自笼5中每个多端口的最低未冻深度。为减少采集干扰，操作从最下游的多端口开始，逐步向上游进行。每个端口采集2份30毫升样品：第一份经0.45微米过滤，第二份用于测定pH、氧化还原电位（oxidation-reduction potential, Eh）和电导率（electrical conductivity, EC）值。所有样品均经酸化处理（用硝酸调pH至2以下）并冷冻保存，随后运输至澳大利亚。

元素浓度由澳大利亚南极局采用Varian 720-ES光谱仪通过电感耦合等离子体-光学发射光谱法（inductively coupled plasma-optical emission spectroscopy, ICP-OES）分析测定。标准溶液与样品溶液先与含5mg/L钇（内标）的10%（v/v）硝酸中0.75%（w/v）氯化铯基质改性剂按1:1在线混合，再测定其发射强度。2014年的分析被认为无需使用基质改性剂。