摘要
用１４Ｃ－标记的化合物研究了ｐ，ｐ＇－ＤＤＥ在我国亚热带地区杭州黄松土旱地和淹水的土壤中的行为。Ｐ，Ｐ＇－ＤＤＥ在旱地土壤中的消失速度要比淹水土壤中快。在淹水土壤中，它的总残留半减期为４３天，而在旱地土壤中仅为２５天．在两种条件下Ｐ，Ｐ＇－ＤＤＥ在分布模式上无明显差异．１４Ｃ－ｐ，ｐ＇－ＤＤＥ残留的大部分集中在土壤剖面的２ｃｍ以内。无论在旱地中还是在水田中，１４Ｃ－ｐ，ｐ＇－ＤＤＥ都是很稳定的，它的残留提取物中大部分（９０％以上）仍然是ｐ，ｐ＇－ＤＤＥ。
C-labelled p,p'-DDE was used to study the behavior of p,p'-DDE in ' Fluvio Marine Yellow Loamy soil' under upland and flooded conditions at Hangzhou, the subtropical area in China. The dissipation of p,p'-DDE in the soil under upland condition is faster than flooded condition. The half-life of p,p'-DDE residue in soil is 43 days for flooded condition, and only 25 days for upland. There is no big difference in the distribution pattern of p,p'-DDE for both conditions. Most of 14C-p,p'-DDE residue is concentrated within the layer of 0-2cm in soil. The p,p'-DDE is very stable in soil in both cases, and 14C-p,p'-DDE still take about 90% of the total 14C-activity in the methanol extractable residue even 43 weeks after tyeatment.
出处
《核技术》
CAS
CSCD
北大核心
1995年第10期621-624,共4页
Nuclear Techniques
基金
IAEA的资助
