ABSTRACT
D u e to O cean D u m p in g A c t and lack o f co n ta in m en t facilities, th e d isp o sa l o f n early 7 m illion to n s o f d red g e d sed im en ts p e r y ea r h as b eco m e a m a jo r p ro b lem fo r N Y /N J m e tro p o litan area. T h e d red g ed sed im en ts in a slu rry fo rm n eed to b e d e -w ate red , rem ed ia ted and d isposed . T h e co n tam in an ts (heavy m e ta ls an d o rg an ic s) in th e d red g ed sed im en ts a re usua lly a tta c h ed to th e clay an d silt frac tio n s. T h e so n ica tio n co u p led w ith ex tra c tio n u sin g su b -a tm o sp h eric p re ssu re w a s u se d in th is re sea rch to rem o v e co n tam in an ts and w a te r fro m d red g e d residues.
