Retention and leachability of organotin(IV)-treated Hevea brasiliensis, Alstonia scholaris and Macaranga triloba wood

Abstract

Chemical retention subsequently leaching rate of wood preservatives are most important following treatment of wood using preservatives chemical. This study investigated the chemical retention and leaching rate of newly synthesized organotin(IV)-treated three non-durable tropical wood species namely Alstonia scholaris (pulai), Macaranga triloba (mahang) and Hevea brasiliensis (rubberwood). The specific objectives of this study were to determine the retention and leachability of newly synthesized one monosubstituted and two disubstituted organotin(IV) compounds following treatment using full-cell treatment method. Ten 19 mm x 19 mm x 19 mm sized wood cubes of each species were treated with 1% of monophenyltin(IV) (MPT) of the monosubstituted organotin(IV), and dimethyltin(IV) (DMT) and dibutyltin(IV) (DBT) of the disubstituted organotin(IV). Chemical retentions were determined following treatment where all selected woods are gained their weight with the newly synthesized organotin(IV) complexes. The highest retention (10.59 kg m ) was found in A. scholaris which was treated with 1% DMT. Leaching test showed no tin was released after 270 hours where the highest (5.32 ppm) release of tin was determined in DMT-treated A. scholaris wood species from 2nd leachate sample.