Pb Adsorption on Soil Typical to an Ammunition Destruction Site

被引：4

作者：

de Oliveira, Shirlei Aparecida ^{[1
]}

de Lucena Tavares, Silvio Roberto ^{[2
]}

Barbosa, Maria Claudia ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, UFRJ, Civil Engn Program, Rio De Janeiro, RJ, Brazil

[2] Brazilian Agr Res Corp Embrapa, Rio De Janeiro, RJ, Brazil

来源：

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2018年 / 101卷 / 03期

关键词：

Pb; Adsorption; Soil; Isotherm; SORPTION; LEAD; CADMIUM; PH;

D O I：

10.1007/s00128-018-2403-8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Pb, one of the constituents of ammunition, was identified as a contaminant in an ammunition destruction site. The present study aimed to assess Pb adsorption in the horizons of an uncontaminated representative soil profile of the region where the ammunition destruction site is located. Batch test experiments were performed to determine Pb adsorption in soil horizons, using solutions with natural and modified pH. The ISOFIT software was used to select the isotherm model that best fit Pb adsorption in soil horizons. The results showed that the Langmuir model is the best fit, because it presented the lowest corrected Akaike information criterion value. In addition, the graphical analysis indicated a Langmuir-type isotherm. The Langmuir isotherm parameter (Q(0)) indicated lower Pb adsorption capacity in the surface soil layers when compared with that in the deeper layers. The change in the initial solution pH influenced Pb adsorption, mainly in superficial horizons. Thus, the risk of soil Pb contamination might be more pronounced in the surface soil layers.

引用

页码：365 / 371

页数：7

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