基于高速公路沿线土壤中SOM含量的碳基物质吸附Pb(Ⅱ)的预测模型研究

Study on Predictive Models for the Adsorptivity of Carbonaceous Materials on Pb(Ⅱ)Based on Soil Organic Matter Content of the Soil in the Expressway

李建亮 ¹谢真 ¹毛宽¹

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作者信息

1. 招商局生态环保科技有限公司,重庆 400067
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摘要

活性炭(AC)、多壁碳纳米管(MWCNT)和生物质炭BC400、BC700 共 4 种碳基物质(CM),分别附载由同一来源高速公路沿线土壤经稀释得到的 6 种不同土壤有机质(SOM)含量土壤提取的溶解性有机质(DOM),共得到 28 种CM及CM-XSOM复合物,并研究了DOM浓度与SOM含量、CM对DOM吸附量QDOM 与DOM浓度、CM及CM-XSOM复合物表面各酸性基团总含量Qacidity 与QDOM、对重金属Pb(Ⅱ)的吸附量QPb 与Qacidity 之间的关系.结果表明:1)以上研究内容具有明显的线性关系,并基于各线性关系的推导建立了碳基物质在高速公路沿线土壤中对重金属Pb(Ⅱ)的吸附量与SOM含量之间的预测模型;2)通过预测模型只需测定高速公路沿线土壤中SOM含量,可简单快速地预测高速公路沿线土壤环境中碳基物质对重金属的吸附能力.

Abstract

Six different concentrations of DOM solutions were extracted from a series of surface soil of the expressway with different SOM content diluted by the same soil.The DOM solutions were then used to load DOM onto AC,MWCNT and two biochars(BC400 and BC700),respectively,obtaining a total of 28 CM and CM-XSOM complex samples.These CM and CM-XSOM complex samples were then determined for their adsorption capacity for Pb(Ⅱ).The relationships between DOM concentration and SOM content,between QDOM and DOM concentration,between Qacidity and QDOM,as well as between QPb and Qacidity are studied.Results showed that:1)A prediction model of the relationship between adsorption content of carbonaceous materials in soil of expressway on Pb(Ⅱ)and SOM content was established based on the deduction of their linear relationships;2)According to the prediction model,the adsorption capacity of carbonaceous materials in soil of expressway on Pb(Ⅱ)can be predicted easily and fastly by measuring the SOM content.

关键词

碳基物质/土壤有机质/溶解性有机质/重金属吸附/预测模型

Key words

carbonaceous material/soil organic matter/dissolved organic matter/heavy metal adsorption/predictive model

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出版年

2024

公路交通技术

重庆交通科研设计院

公路交通技术

影响因子：0.552

ISSN：1009-6477

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