title: Effect of different water conditions on dissolution of nanosilver.
abstract: This study evaluates the time-dependent dissolution of nanosilver (nAg) in common electrolytes and natural waters. nAg was synthesized via Tollens' method using sodium citrate as stabilizer; its morphology, UV-Vis spectrum, and particle size were characterized. The dissolved silver was monitored over time using filtration, centrifugation, and inductively coupled plasma atomic emission spectroscopy (ICP-AES). Our results indicated that nanoparticle aggregation, Cl(-) presence, and natural organic compounds could affect the dissolution behavior of nAg. The dissolution of nAg was highly dependent on Cl(-) concentration. Excessive Cl(-) enhanced nanoparticle dissolution, whereas natural organic compound inhibited the dissolution. The dissolution data fitted well with the first-order kinetic model, and the dissolution rate coefficients were calculated using the first-order equation. This study showed the dissolution of nAg under various water conditions. The obtained results may be helpful in predicting nAg behavior in relevant environmental aquatic systems.
authors.affiliation: Department of Chemical Engineering, Maoming Polytechnic, Maoming, Guangdong 525000, China.
authors.forename: Shao-Feng
authors.initials: SF
authors.lastname: Chen
authors.forename: Hongyin
authors.initials: H
authors.lastname: Zhang
authors.forename: Qing-Yu
authors.initials: QY
authors.lastname: Lin
mesh_terms: D002712:Chlorides / Q000737:chemistry; D004573:Electrolytes; D005374:Filtration; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D012995:Solubility; D012996:Solutions; D013054:Spectrophotometry, Atomic; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D002712:Chlorides; D004573:Electrolytes; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; D012834:Silver