典型污染场地含水层天然净化能力溶质模拟

摘要

Based on the lithological and hydrological characteristics at a typical petroleum contaminated site, and data collection and analysis of long2term observation and w ater pumping and dispersion experiments, a numerical model of groundw ater flow and solute transport was developed and verified by a flow model.BTEX was used as the simulation factor,the convection2diffu2 sionsolutetransportprocessingroundwaterwassimulatedusingMT3DMSmoduleofGMSsoftware,andtheorganicpollutant biodegradationprocesswiththecoexistenceofavarietyofmobileorimmobilemicroorganismsingroundwaterwassimulatedu2 sing RT3D module of GMS software. T he results showed that chemical reactions of biodegradation can decrease the peak values ofcontamination,andalargeamountofaerobicmicrobesanddenitrificationexistinthestudyarea,whichsuggestedthatin2situ bioremediation can be used to control petroleum pollution.%根据典型石油类污染场地岩性、水文地质等特征，在长期观测、抽水试验及弥散试验等资料搜集与分析基础上，通过水流模型验证，构建了地下水水流运动及溶质迁移的数值模型。选取苯系物( BT EX )作为模拟因子，运用GMS软件中M T3DM S模块模拟地下水对流-弥散溶质迁移过程，运用RT3D 模块模拟研究了地下水中移动、非移动的多种微生物共存的有机污染物生物降解过程。结果表明，生物降解化学反应具有明显的降低污染物峰值的作用，而研究区存在大量的好氧微生物作用和反硝化作用，据此提出可以采用原位生物修复技术来治理石油污染。