title: Distribution of aluminum species and the characteristics of structure of poly-aluminum-chloride-sulfate(PACS).
abstract: A series of poly-aluminum-chloride-sulfate (PACS), which has different basicities (gamma) and Al3+/SO4(2-) molar ratio, has been prepared and dried at 105 degrees C and 65 degrees C, respectively. The distribution of aluminum species of PACS was examined, and the effect of gamma value, Al3+/SO4(2-) molar ratio, dilution on the distribution of aluminum species of PACS was also investigated by using Alferron timed complex colorimetric method. The IR spectroscopy and X-ray diffraction were used to study the effect of gamma value, Al3+/SO4(2-) molar ratio and the drying temperature on the structure of PACS. The experimental results show that Al3+/SO4(2-) molar ratio has a great effect on the distribution of aluminum species, but the dilution has a little effect on the distribution of aluminum species. The lower the Al3+/SO4(2-) molar ratio, the higher the proportions of the polymer and colloidal species in PACS. The polymeric degree of PACS was related to gamma value and Al3+/SO4(2-) molar ratio. Drying temperature has an influence on the structure and the solubility of solid PACS products.
authors.affiliation: Department of Environmental Engineering, Shandong University, Jinan 250100, China. bygao@sdu.edu.cn
authors.forename: B Y
authors.initials: BY
authors.lastname: Gao
authors.forename: Q Y
authors.initials: QY
authors.lastname: Yue
authors.forename: H
authors.initials: H
authors.lastname: Yu
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000534:Alum Compounds / Q000737:chemistry*; D000077410:Aluminum Chloride; D017607:Aluminum Compounds / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D003124:Colorimetry; D005427:Flocculation; D017693:Sodium Bicarbonate / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D000534:Alum Compounds; D017607:Aluminum Compounds; D002712:Chlorides; C041524:aluminum sulfate; D000077410:Aluminum Chloride; D017693:Sodium Bicarbonate