title: The impact of particulates on the aqueous sonication of bromobenzene.
abstract: Sonodegradation of bromobenzene, bromophenolate ion, and 2,4,5-trichlorobiphenyl was studied in the presence of various types of solid particles suspended in water. Three particle diameters (10 nm, 15 microm, and 35 microm) and two particle types (silica particles and organic resin) were investigated over a range of particle concentrations (0.05-10 g l(-1)). The sonochemical decomposition rate constant for bromobenzene (k = 0.044 +/- 7.50 x 10(-4) min(-1) at 20 kHz) was not significantly impacted by very fine silica particles (10 nm). The presence of 15 microm silica decreased sonication rates slightly (<7%) even at a concentration of 10 g l(-1). Organic resin particles demonstrated a more significant impact, particularly at higher concentration and with very hydrophobic compounds. These findings are significant for the application of ultrasound to treatment streams containing solid particles.
authors.affiliation: School of Civil Engineering, Purdue University, West Lafayette, IN 47907-1284, USA.
authors.forename: Guangming
authors.initials: G
authors.lastname: Zhang
authors.forename: Inez
authors.initials: I
authors.lastname: Hua
mesh_terms: D000327:Adsorption / Q000187:drug effects; D000465:Algorithms; D001969:Bromobenzenes / Q000737:chemistry / Q000302:isolation & purification*; D057927:Hydrophobic and Hydrophilic Interactions; D010316:Particle Size; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D011078:Polychlorinated Biphenyls / Q000737:chemistry / Q000302:isolation & purification*; D012116:Resins, Plant / Q000008:administration & dosage; D012822:Silicon Dioxide / Q000008:administration & dosage; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000302:isolation & purification*; D013010:Sonication / Q000295:instrumentation*; D014867:Water / Q000008:administration & dosage
chemical_list: D001969:Bromobenzenes; D010636:Phenols; D012116:Resins, Plant; D012987:Soil; D012989:Soil Pollutants; D014867:Water; C015550:2,4',5-trichlorobiphenyl; D012822:Silicon Dioxide; C032036:bromobenzene; D011078:Polychlorinated Biphenyls; C032037:4-bromophenol