The effect of copper speciation on the formation of chlorinated aromatics on real municipal solid waste incinerator fly ash.
The effect of copper speciation on the formation of chlorinated aromatics on real municipal solid waste incinerator fly ash.
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DOI：
10.1016/j.chemosphere.2004.12.049
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发表时间：
2005-06
期刊：
影响因子：
8.8
通讯作者：
M. Takaoka;Takashi Yamamoto;A. Shiono;N. Takeda;K. Oshita;Tadao Matsumoto;Tsunehiro Tanaka
中科院分区：
文献类型：
--
作者：
M. Takaoka;Takashi Yamamoto;A. Shiono;N. Takeda;K. Oshita;Tadao Matsumoto;Tsunehiro Tanaka
关于铜的化学形态与粉煤灰中氯化芳烃的形成之间的关系的资料有限。为了了解不同形式的铜对真实粉煤灰中氯代芳烃形成的影响，我们利用x射线吸收近边结构（XANES）测定了不同类型真实粉煤灰中铜的化学形态，并评估了铜的化学形态与氯代芳烃形成的关系。实际飞灰中铜主要以氯化氢氧化铜（CuCl2·3Cu(OH)2）和氯化亚铜（CuCl）为主。虽然在实验条件下，纯氯化铜（CuCl2）被认为是合成粉煤灰生成氯化芳烃的最活跃的催化剂，但并不是在每个实际的粉煤灰样品中都发现了CuCl2。实际粉煤灰中氯氧化铜的含量与氯代芳烃的生成呈正相关，因此被认为是参与氯代芳烃生成的关键物质之一。
A limited amount of information exists regarding the relationship between the chemical form of copper and the formation of chlorinated aromatics in fly ash. To understand the effects of the various forms of copper on the formation of chlorinated aromatics in real fly ash, we determined the chemical forms of copper present in various types of real fly ash using X-ray absorption near edge structure (XANES) and evaluated the relationship between the chemical forms of copper and the formation of chlorinated aromatics. Copper chloride hydroxide (CuCl2·3Cu(OH)2) and cuprous chloride (CuCl) were the predominant copper species found in real fly ash. Although pure cupric chloride (CuCl2) is known to be the most active catalyst for the formation of chlorinated aromatics under experimental conditions with synthetic fly ash, CuCl2was not found in every real fly ash sample. The amount of copper chloride hydroxide was positively correlated with the formation of chlorinated aromatics in real fly ash and is, consequently, considered to be one of the key species involved in the formation of chlorinated aromatics.