我国在城镇化进程中产生了很多城市污染场地，急需周期短和稳定性高的治理技术，但目前行之有效的技术仍然短缺。依据自然界土壤与矿物的地质演变关系，本项目提出充分利用自然界硅和铝元素的循环、水热快速原位合成土壤为沸石的新思维，以期实现稳定固定土壤重金属在沸石结构中的土壤治理新方法。为此，主要进行如下研究：首先水热合成化学药品为目标沸石，以便进行精密的微观结构和重金属固定的研究；然后水热转变土壤为目标沸石，研究沸石固定重金属的特性机理以及重金属的浸出特性。以期解决下列科学问题：水热选择性合成目标沸石的条件与机理；多种沸石固定多种重金属的体系中，沸石竞争及选择性固定重金属的特性及机理；沸石种类、合成条件、重金属性质、外界环境等对土壤重金属浸出的影响。该方法处理温度低、治理周期短、固定稳定性好、并可设计为移动式修复设备，属一种既能增强土壤自净化力，又能让重金属回归大自然的治理修复新方法。

In the process of urbanization, there occurred many polluted sites in cities, which urgently need the technologies for short-term and high-stability treatments; however, the effective technologies for the treatments are still not found. According to the evolution between the soil and minerals in nature, this project proposes a novel idea, i.e., realize the rapid circulation of silicon and aluminum in nature and hydrothermally convert contaminated soils into minerals rapidly and in turn immobilize the heavy metals of the soil stably in the structures of these synthetic minerals simultaneously. To realize the idea, the study include several contents as follow: First, hydrothermal synthesis of chemicals as the target zeolite, so as to obtain a precise microstructure and immobilization of heavy metals studies; then hydrothermal conversion of the soil into the target zeolite, to study the mechanism and leaching characteristics of zeolites-heavy metals system. The following scientific problems are therefore expected to be solved: the condition and mechanism of selectivity of hydrothermal zeolite synthesis; the competitive and selective immobilization/adsorption features and mechanisms in multi-zeolites and/or heavy metals system; the influence of synthesized zeolites, synthesis conditions, immobilized heavy metal and environmental conditions on heavy metal leaching. The method possesses the advantages of low processing temperature, short treatment period; good immobilized stability and can be designed as a mobile repair device also. It is such a new method that has capabilities of enhancing the self-purification capacity of soil and making heavy metals back to nature.