Engelmann M D, Doyle J G, Cheng I F
Department of Chemistry, College of Letters and Sciences, University of Idaho, Moscow 83844, USA.
Chemosphere. 2001 Apr;43(2):195-8. doi: 10.1016/s0045-6535(00)00163-6.
The complete dechlorination of 1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) by a magnesium/palladium bimetallic system has been accomplished. The reaction takes place under ambient temperature and pressure and mild reaction conditions requiring only 0.25 g of magnesium and 0.3% palladium (wt/wt) to drive the dechlorination of 100 microg DDT (50 ppm in 2 ml). The process is both rapid and complete requiring less than 10 min to attain total dechlorination within the detection limit (approximately 10 pg for DDT) of electron capture detection gas chromatography (GC-ECD). The major product formed, as deduced from mass spectrometry (GC-MS) is the hydrocarbon skeleton, 1,1-diphenylethane. This technology may allow for the development of an economic and environmentally benign method of DDT remediation.
镁/钯双金属体系已实现对1,1-双（4-氯苯基）-2,2,2-三氯乙烷（滴滴涕）的完全脱氯。该反应在室温和常压下进行，反应条件温和，仅需0.25克镁和0.3%钯（重量/重量）就能使100微克滴滴涕（2毫升中50 ppm）脱氯。该过程快速且完全，在电子捕获检测气相色谱法（GC-ECD）的检测限（滴滴涕约为10皮克）内，不到10分钟即可实现完全脱氯。从质谱（GC-MS）推断，形成的主要产物是烃骨架1,1-二苯乙烷。该技术可能会促成一种经济且环境友好的滴滴涕修复方法的开发。
