沈阳市雪与水中对二氯苯的挥发污染行为

Volatilization contaminative behavior of p-dichlorobenzene in the snow and water in Shenyang City, China

应用气相色谱法对对二氯苯（p-DCB）在雪与水中残留动态进行测定，探讨了不同气候下水中p-DCB的挥发污染行为．结果表明,雪与水中PDCB的挥发速率都相当迅速，并服从一级反应动力学．在自然条件下，雪与水中p-DCB半减期分别为2．32～3．25d和0．76～1．20d,雪与水中p-DCB在投加浓度分别为0．1-100．0μg/g．0．1～100．0μg／mL范围时，投加浓度越高挥发速率越快，挥发半减期越短．

The volatilization contaminative behavior of p-DCB in snow and water under different climate was explored on the basis of the determination of residual dynamics of p-DCB in snow and water applying the gas chromatogram technique. The volatilization rate of p-DCB in snow and water was fairly rapid and obeyed to the first-rank reactive dynamics. Under natural conditions, the half-life ofp-DCB in snow and water was 2.32-3.25 days and 0.76-1.20 days, respectively. When the adding concentration of p-DCB in snow and water was in the range of 0.1-100.0μg/g and 0.1-100.0μg/mL, the higher the adding concentration, the quicker the volatilization rate and the shorter the half-life.