Simultaneous treatment of PVC and oyster-shell wastes by mechanochemical means.
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.
Tongamp
W
W
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University 2-1-1, Katahira, Aoba-Ku, Sendai 980-8577, Japan. bune@andy.tagen.tohoku.ac.jp
Kano
J
J
Zhang
Q
Q
Saito
F
F
D000818:Animals; D002119:Calcium Carbonate / Q000737:chemistry*; D002713:Chlorine; D010125:Ostreidae / Q000737:chemistry*; D011143:Polyvinyl Chloride / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D012995:Solubility; D013997:Time Factors; D014867:Water
D014867:Water; D002713:Chlorine; D011143:Polyvinyl Chloride; D002119:Calcium Carbonate