Contaminant mobility in soils/sediments and treatment studies

拟议的研究将扩展先前关于污染物的环境命运和运输的工作。目标将是：(1)扩大对重金属环境流动性和可得性的研究。关键变量包括土壤特征、优先吸附、分配、不同环境条件下的吸附动力学和机理、分布和解吸。将进行实地和实验室研究。生物利用度也将被检查。(2)为拓展前人在各种土壤中重金属滞留的研究，开展斜沸石的大型实验研究，探索其在三相流化床中对ARD的吸附效率和处理能力。(3)开展重金属植物修复研究，包括公路沿线土壤的植物稳定，以防止金属通过土壤迁移，从而污染溪流和河流。(4)进行一项大型实验研究，以调查多溴二苯醚（PBDEs）的环境途径和命运。多溴二苯醚是一种添加在各种产品中的阻燃剂，如电脑和电视的塑料部件、电路板、室内装潢和纺织品。

The proposed research will extend previous work on the environmental fate and transport of contaminants. The objectives will be: (1) To extend research on environmental mobility of heavy metals and availability. Key variables include soil characteristics, preferential sorption, partitioning, sorption kinetics and mechanism, distribution and desorption for different environmental conditions. Field and laboratory studies will be carried out. Bio-availability will also be examined. (2) To extend previous work on retention of heavy metals in various soils, conduct a major experimental study on clinoptilolite to explore its sorption efficiency and treatment capacity for ARD remediation in a three-phase fluidized bed. (3) To undertake a phytoremediation study for heavy metals involving phytostabilization of soils along highways to prevent migration of metals through soil which might contaminate streams and rivers. (4) To undertake a major experimental study to examine the environmental pathways and fate of polybrominated diphenyl ethers (PBDEs) - flame retardants added to a wide variety of products such as plastic components of computers and televisions, circuit boards, upholstery, and textiles.