Pd/Al bimetallic nanoparticles were prepared by replacement deposition method. The obtained Pd/Al nanoparticles were applied as catalyst to dechlorinate refractory 3-chlorophenol (3-CP) in aqueous solution. The effect of pH.Pd loading quantity, catalyst dosage and temperature on dechlorination efficiency was investigated and the mechanism of catalytic dechlorination of 3-CP was analyzed. Results showed that 93. 25% (mass fraction, similarly hereafter) -96. 67% of Pd in initial solution achieved the replacement deposition onto the Al substrates when the initial pH was 3. 0. Under the following conditions: initial pH was 3. 0,Pd/Al nanoparticles was 2 g/L,Pd loading quantity was 1. 16% and reacted at 25℃ ,more than 99% of 3-CP with the initial concentration of 0. 389 mmol/L could be effectively removed. Degradation of chlorinated organic pollutant by Pd/Al bimetallic nanoparticles had some advantages of high efficiency and low energy consumption,so it had the good prospect in future optical application.%采用置换沉积法制备了纳米钯/铝双金属催化剂,氢解还原去除水相中难降解有毒有机物3-氯酚(3-CP),考察了溶液pH、钯负载量、纳米钯/铝双金属投加量、反应温度对脱氯效果的影响并解析相关反应机制.结果表明:(1)初始pH 3.0时,沉积液中93.25％(质量分数,下同)～96.67％的钯可有效负载于铝材上.(2)在pH为3.0、纳米钯/铝双金属投加量为2 g/L、钯负载量为1.16％(质量分数)、反应温度为25℃下降解初始摩尔浓度为0.389 mmol/L的3-CP,反应终了时脱氯率在99％以上.利用纳米钯/铝双金属降解氯代有机污染物具有高效低耗的优势,在实际应用上具有较好的前景.
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