Remediation of a historically Pb contaminated soil using a model natural Mn oxide waste.
Remediation of a historically Pb contaminated soil using a model natural Mn oxide waste.
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DOI：
10.1016/j.chemosphere.2015.05.054
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发表时间：
2015-11
期刊：
影响因子：
8.8
通讯作者：
C. McCann;N. Gray;Janette Tourney;R. Davenport;Matthew John Wade;N. Finlay;K. Hudson-Edwards;K. Johnson
中科院分区：
文献类型：
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作者：
C. McCann;N. Gray;Janette Tourney;R. Davenport;Matthew John Wade;N. Finlay;K. Hudson-Edwards;K. Johnson
天然氧化锰（NMO）废物被评估为原位修复修正铅污染的网站。使用10个月的蒸渗仪试验，其中历史上铅污染的土壤进行了修订，按重量计10%的模型NMO的可行性进行了研究。发现模型NMO具有大的Pb吸附容量（qmax 346 ± 14 mg g−1）。然而，由于土壤中铅污染的异质性（3650.54-9299.79 mg kg−1），通过地球化学检测，未检测到铅的处理相关差异。为了克服传统的地球化学技术由于污染物的异质性的困难，我们提出了一种新的方法，明确证明金属吸附原位修复修正案。该方法结合了两种光谱技术，即电子探针显微分析（EPMA）和X射线光电子能谱（XPS）。利用这一点，我们表明，固定在NMO，这是铅免费之前，他们除了土壤中的铅。修正案的土壤与外源锰氧化物没有影响微生物的功能，也没有扰动的优势门的组成。我们的结论是，NMOs表现出良好的潜力，作为修复修正。
A natural Mn oxide (NMO) waste was assessed as anin situremediation amendment for Pb contaminated sites. The viability of this was investigated using a 10 month lysimeter trial, wherein a historically Pb contaminated soil was amended with a 10% by weight model NMO. The model NMO was found to have a large Pb adsorption capacity (qmax346 ± 14 mg g−1). However, due to the heterogeneous nature of the Pb contamination in the soils (3650.54–9299.79 mg kg−1), no treatment related difference in Pb via geochemistry could be detected. To overcome difficulties in traditional geochemical techniques due to pollutant heterogeneity we present a new method for unequivocally proving metal sorption toin situremediation amendments. The method combines two spectroscopic techniques; namely electron probe microanalysis (EPMA) and X-ray photoelectron spectroscopy (XPS). Using this we showed Pb immobilisation on NMO, which were Pb free prior to their addition to the soils. Amendment of the soil with exogenous Mn oxide had no effect on microbial functioning, nor did it perturb the composition of the dominant phyla. We conclude that NMOs show excellent potential as remediation amendments.