Tongamp W, Kano J, Zhang Q, Saito F
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University 2-1-1, Katahira, Aoba-Ku, Sendai 980-8577, Japan.
Waste Manag. 2008;28(3):484-8. doi: 10.1016/j.wasman.2007.01.022. Epub 2007 May 1.
This work presents a new process for dechlorinating poly-vinyl chloride (PVC) by the use of oyster-shell waste. The process consists of milling of PVC waste with oyster-shell waste, followed by washing the milled sample with water. The milling of PVC and oyster-shell mixture results in size reduction and rupture in bonds, leading to mechanically induced reactions between the two to form CaCl2 and hydrocarbon with C=C bonds. Washing the milled mixtures with water at room temperature allows complete removal of chlorine from the milled sample. More than 95% of chlorine in PVC was removed when 2h grinding is conducted for the mixture. The present process could offer a potential route to the handling and disposal of oyster-shell and PVC wastes.
这项工作提出了一种利用牡蛎壳废料对聚氯乙烯（PVC）进行脱氯的新工艺。该工艺包括将PVC废料与牡蛎壳废料一起研磨，然后用水洗涤研磨后的样品。PVC和牡蛎壳混合物的研磨会导致尺寸减小和化学键断裂，从而引发两者之间的机械诱导反应，形成氯化钙和含有碳碳双键的碳氢化合物。在室温下用水洗涤研磨后的混合物，可以使研磨后的样品中的氯完全去除。当对混合物进行2小时研磨时，PVC中超过95%的氯被去除。本工艺可为牡蛎壳和PVC废料的处理与处置提供一条潜在途径。
