土壤环境中活性X-3B红染料的淋溶行为与淹水释放模拟研究

Simulated studies on leaching behavior and flooding release of reactive X-3B red dye in soil environments

采用土柱模拟实验对土壤环境中活性X 3B红染料的淋溶行为及向下迁移能力进行研究 .结果表明 ,活性X 3B红染料这一有机污染物在土壤中的淋溶及向下迁移是一指数函数可以表达的动态过程 ,其可淋失能力因土壤类型不同而有较大的差异 ,其顺序为 :褐土 >棕壤 >红壤 >水稻土 .究其原因 ,主要与土壤本身的各理化特性有关 ,即可淋失能力不仅与土壤粘粒和有机质含量存在显著负相关 ,与土壤 pH值存在显著正相关 ,土壤阳离子交换量也对其可淋失能力具有一定的贡献 ,是土壤各理化特性的综合 .此外 ,通过污染土壤淹水实验 ,初步确定土壤中活性X

Leaching behavior and downward transport ability of reactive X 3B red dye in soil environment were studied using the simulated experimental method of soil columns.It was indicated that the dfynamic processes could be described by exponential functions.The leachability of this organic pollutant was dependent on soil types:cinnamon soil>burozem>>paddy soil>red soil,in particular,directly related to physical and chemical properties of the tested soil samples.It was further testified by a single\|factor and multi\|factor regressive analysis.There was remarkably negative correlation between the leaching rate of the pollutant and the content of soil clay or organic matter,remarkably positive correlation between the leaching rate of the pollutant and soil pH values.The leachability was also influenced by soil CEC according to the multianalysis and was thus a function of joint effects from various soil factors.In addition,environmental risk of reactive X 3B red dye release from a soil comparment to a water compartment was primarily determined using the polluted soil inundation method.