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首页> 外文期刊>Water, air and soil pollution >Portable X-ray Fluorescence (PXRF) Analysis of Total Metal(loid)s and Sequential Extraction of Bioavailable Arsenic in Agricultural Soils of Animas Watershed
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Portable X-ray Fluorescence (PXRF) Analysis of Total Metal(loid)s and Sequential Extraction of Bioavailable Arsenic in Agricultural Soils of Animas Watershed

机译：可便携式X射线荧光（PXRF）分析总金属（LOID）S＆Sievailable Arsenic中生物利用砷的顺序提取

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The Animas River provides irrigation water in northwestern New Mexico and the Navajo Nation. Concerns regarding the river water quality arose on August 5, 2015, when approximately 11.35 million liters of heavy metal contaminated water was accidentally released from the Gold King Mine into the Animas River. This study sought to determine the total concentrations of 7 heavy metal(loid)s (As, Pb, and Zn as metals of concern and Fe, Mn, Ca, and Cu as metals of interest) using portable X-ray fluorescence (PXRF) in two agricultural fields and compare these values to Environmental Protection Agency (EPA) regional screening levels (RSL). Total concentrations of 6 out of 7 metals were below the RSL; only As exceeded the soil screening value of 7.07 mg kg(-1) at some locations in the agricultural fields. We also determined water-soluble (WS) and exchangeable fractions (Ex) of As that might be available for agricultural crop uptake using sequential extractions. The WS-As ranged from 0.014 to 0.074 mg kg(-1) and Ex-As ranged from 0.135 to 0.248 mg kg(-1) and thus were less than 1 and 3% of the total As concentration respectively (ranging from 5.62 to 14.79 mg kg(-1)) and not considered a threat for plant tissue accumulation. While the concentrations of As observed in the agricultural fields may have exceeded screening levels, the As was not apparently plant available and its risk to crops was determined to be low.
机译：Animas River在新墨西哥州西北部和纳瓦霍国家提供灌溉用水。关于河水水质的担忧于2015年8月5日出现，当时大约1135万升重金属受污染的水被意外从金王矿释放到Animas河中。使用便携式X射线荧光（PXRF），本研究试图确定7重金属（作为CO，Pb和Fe，Mn，Ca和Cu的金属的金属）的总浓度）在两个农业领域，并将这些价值观与环境保护局（EPA）区域筛查水平（RSL）进行比较。 7个金属中的6个中的总浓度低于RSL;仅超过农业领域某些地点的7.07毫克千克（-1）的土壤筛查值。我们还确定了水溶性（WS）和可交换的分数（例如，使用顺序提取可能可用于农业作物摄取。 WS-如0.014至0.074 mg kg（-1）和离前范围为0.135至0.248 mg kg（-1），因此分别小于1和3％的总浓度（从5.62到14.79 mg kg（-1）），不被认为是植物组织积累的威胁。虽然在农业领域观察到的浓度可能超过筛查水平，但由于不明显植物可用，并且其对作物的风险被确定为低。

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