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首页> 外文会议>Environmental challenges and solutions to development, production, and use >MODEL DEVELOPMENT AND SIMULATION OF IN SITU STABILIZATION IN LEAD-CONTAMINATED SOILS
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MODEL DEVELOPMENT AND SIMULATION OF IN SITU STABILIZATION IN LEAD-CONTAMINATED SOILS

机译：铅污染土壤原位稳定的模型开发与模拟

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Stabilization and remediation of lead-contaminated soils have received considerable attention recently.rnAmending Pb-contaminated soils with phosphate as an in situ remediation option has been proposed as anrnalternative to other remediation options such as soil removal. Research shows that hydroxyapatite (HA)rn[Ca_5(PO_4)_3OH] can reduce the bioavailability of Pb efficiently and thus is considered as an ideal phosphaternsource for formation of lead pyromorphite. Environmental models are increasingly being relied upon to helprnidentify the limiting factors in such kind of in situ remediation.rnIn the present work, models which include adsorption, diffusion, and reaction have been developed torndescribe the transformation of lead contaminants to pyromorphite in single particles, aggregates, and soil beds,rnrespectively. Principal factors controlling the time of remediation have been identified.rnThe contaminated aggregates remediation model has been developed and simulated to describe therneffect of initial contaminant concentration, diffusion coefficient, and aggregate diameter on the time ofrnremediation.
机译：铅污染土壤的稳定和修复近来受到了广泛关注。提出了将磷酸盐污染的铅污染土壤作为原位修复方案的建议，作为土壤修复等其他修复方案的替代方案。研究表明，羟基磷灰石（HA）rn [Ca_5（PO_4）_3OH]可以有效地降低Pb的生物利用度，因此被认为是形成铅锰铁矿的理想磷酸盐来源。越来越多地依赖环境模型来帮助确定此类原位修复中的限制因素。在当前工作中，已开发出包括吸附，扩散和反应的模型来描述单颗粒，聚集体中铅污染物向硫铁矿的转化。和土壤床。确定了控制修复时间的主要因素。rn建立并模拟了受污染的骨料修复模型，以描述初始污染物浓度，扩散系数和骨料直径对修复时间的影响。

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