Contaminant mobility in soils/sediments and treatment studies

拟议的研究将扩展之前关于污染物的环境命运和迁移的工作。目标将是：(1)扩大对重金属环境迁移和有效性的研究。关键变量包括土壤特性、优先吸附、分配、吸附动力学和机理、在不同环境条件下的分布和解吸。将进行实地和实验室研究。还将检查生物利用度。(2)在前人关于重金属在不同土壤中滞留研究的基础上，对斜发沸石进行了一系列的实验研究，考察了斜发沸石在三相流态化条件下对ARD的吸附效率和处理能力。(3)对重金属进行植物修复研究，包括对公路沿线的土壤进行植物稳定，以防止金属在土壤中迁移，从而可能污染溪流和河流。(4)进行一项大型实验研究，以研究多溴二苯醚(PBDEs)的环境途径和去向。多溴二苯醚是一种添加到各种产品中的阻燃剂，如计算机和电视的塑料部件、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.