The influence of ethylenediamine tetra acetic acid (EDTA) on the transformation and solubility of metallic palladium and palladium(II) oxide in the environment.

The influence of ethylenediamine tetra acetic acid (EDTA) on the transformation and solubility of metallic palladium and palladium(II) oxide in the environment.
复制标题

乙二胺四乙酸(EDTA)对环境中金属钯和氧化钯(II)转化和溶解度的影响

DOI:
10.1039/c5em00078e
复制
发表时间:
2015
期刊:
Environmental science. Processes & impacts
影响因子:
--
通讯作者:
Kerstin Leopold
Kerstin Leopold
中科院分区:
--
文献类型:
--
作者:
Fathi Zereini;Clare L. S. Wiseman;My Vang;Peter Albers;Wolfgang Schneider;Roland Schindl;Kerstin Leopold

文献摘要

参考文献

被引文献

相似文献

汽车催化转化器中铂(Pt)、钯(Pd)和铑(Rh)浓度升高的环境事件已得到充分记录。然而,关于它们在排放后的化学行为的信息有限,特别是在存在常见络合剂的情况下。本研究的目的是研究乙二胺四乙酸(EDTA)对可能的环境转化和溶解度的钯进行批量实验,使用金属钯(钯黑)和钯(II)的氧化物(PdO)的影响。使用X射线光电子能谱(XPS)和透射电子显微镜/能量色散X射线光谱(TEM/EDX)技术分析处理后的样品的颗粒表面化学的变化。金属钯部分转化为PdOx(x <1),而PdO基本上不受影响。观察到EDTA溶液的pH调节Pd溶解度,其中Pd黑显示出比PdO更高的溶解度。溶解度也被发现,以增加相应的EDTA溶液浓度的强度的增加,以及与提取时间的长度。对于大多数样品,Pd的总溶解度保持相对低(<1重量%)。Pd黑在0.1 M EDTA(pH 7)中的溶出速率为2.01 ± 0.17 nmol m − 2 h − 1。与之前关于钯在环境中不迁移的假设相反,以金属形式排放的少量该元素可能在EDTA等络合剂的存在下可溶。
The environmental occurrence of elevated concentrations of platinum (Pt), palladium (Pd) and rhodium (Rh) from automotive catalytic converters has been well-documented. Limited information exists regarding their chemical behavior post-emission, however, especially in the presence of commonly occurring complexing agents. The purpose of this study is to examine the influence of ethylenediamine tetra acetic acid (EDTA) on the possible environmental transformation and solubility of Pd by conducting batch experiments using metallic palladium (Pd black) and palladium(II) oxide (PdO). Changes in the particle surface chemistry of treated samples were analyzed using X-ray Photoelectron Spectroscopy (XPS) and Transition Electron Microscopy/Energy Dispersive X-ray Spectrometry (TEM/EDX) techniques. Metallic palladium was partially transformed into PdOx (x < 1), while PdO remained largely unaffected. The pH of EDTA solutions was observed to modulate Pd solubility, with Pd black demonstrating a higher solubility compared to PdO. Solubility was also found to increase with a corresponding increase in the strength of EDTA solution concentrations, as well as with the length of extraction time. The overall solubility of Pd remained relatively low for most samples (<1 wt%). A dissolution rate of 2.01 ± 0.17 nmol m−2 h−1 was calculated for Pd black in 0.1 M EDTA (pH 7). In contrast to previously held assumptions about the environmental immobility of Pd, small amounts of this element emitted in metallic form are likely to be soluble in the presence of complexing agents such as EDTA.
DOI: 10.1016/s0003-2670(99)00776-x
发表时间: 2000
影响因子: 6.2
作者:
Bernadette Stypinski;G. Anderegg
通讯作者: G. Anderegg
首次对巴西圣保罗市主要街道土壤中人为铂、钯和铑含量进行研究
DOI: --
发表时间: 2012
影响因子: 3
作者:
Andreza Portella Ribeiro;Ana Maria Graciano Figueiredo;J. Sarkis;M. Hortellani;Bernd Markert
通讯作者: Bernd Markert
DOI: 10.1039/b212218a
发表时间: 2003-01-01
影响因子: 3.4
作者:
Kanitsar, K;Koellensperger, G;Stingeder, G
通讯作者: Stingeder, G
DOI: --
发表时间: 2005
影响因子: 2.7
作者:
J. Bowles;A. Giże
通讯作者: A. Giże
DOI: --
发表时间: 2003
影响因子: 8.9
作者:
S. Zimmermann;C. Menzel;D. Stüben;H. Taraschewski;B. Sures
通讯作者: B. Sures