title: Characteristics and aluminum reuse of textile sludge incineration residues after acidification.
abstract: The chemical composition and aluminum speciation of sludge incineration residue (SIR) were determined. Cementation of aluminum from sulfuric acid solution using SIR was studied. The results showed that acid-soluble inorganic aluminum was the predominant component in the sludge, and the total leached aluminum increased from 62.2% to 92.9% after incineration. Sulfuric acid dosage and reaction time were found to affect aluminum recovery positively. Conversely, the increase in temperature significantly inhibited recovery reactions. The optimized leaching condition was 1.66 g sulfuric acid per gram of SIR with a reaction time of 3 hr at 20 degrees C, resulting in the highest aluminum leaching rate of 96.7%. Compared to commercial aluminum sulfate solution coagulants, the leaching solution demonstrated higher COD(Cr), turbidity and color removal efficiency for textile wastewater.
authors.affiliation: College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. egghmh@163.com
authors.forename: Manhong
authors.initials: M
authors.lastname: Huang
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.forename: Donghui
authors.initials: D
authors.lastname: Chen
authors.forename: Saijie
authors.initials: S
authors.lastname: Zhou
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017745:Incineration / Q000379:methods*; D007220:Industrial Waste; D012722:Sewage / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry*; D013783:Textile Industry
chemical_list: D007220:Industrial Waste; D012722:Sewage; D013464:Sulfuric Acids; D000535:Aluminum; C033158:sulfuric acid