Phosphorus removal from aqueous solution using a novel granular material developed from building waste.
In this study, a granular material (GM) developed from building waste was used for phosphate removal from phosphorus-containing wastewater. Batch experiments were executed to investigate the phosphate removal capacity of this material. The mechanism of removal proved to be a chemical precipitation process. The characteristics of the material and resulting precipitates, the kinetics of the precipitation and Ca2+liberation processes, and the effects of dosage and pH were investigated. The phosphate precipitation and Ca2+liberation processes were both well described by a pseudo-second-order kinetic model. A maximum precipitation capacity of 0.51 ± 0.06 mg g-1and a liberation capacity of 6.79 ± 0.77 mg g-1were measured under the experimental conditions. The processes reached equilibrium in 60 min. The initial solution pH strongly affected phosphate removal under extreme conditions (pH <4 and pH >10). The precipitates comprised hydroxyapatite and brushite. This novel GM can be considered a promising material for phosphate removal from wastewater.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an, Shaanxi 710055, China E-mail: yangshengjiong@163.com; State Key Laboratory of Architecture and Technology in Western China (XAUAT), No. 13 Yanta Road, Xi'an, Shaanxi 710055, China.
Shengjiong
S
Yang
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an, Shaanxi 710055, China E-mail: yangshengjiong@163.com.
Pengkang
P
Jin
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an, Shaanxi 710055, China E-mail: yangshengjiong@163.com.
Xiaochang C
XC
Wang
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an, Shaanxi 710055, China E-mail: yangshengjiong@163.com.
Qionghua
Q
Zhang
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an, Shaanxi 710055, China E-mail: yangshengjiong@163.com.
Xiaotian
X
Chen
D000327:Adsorption; D002118:Calcium / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D010710:Phosphates / Q000302:isolation & purification; D010758:Phosphorus / Q000302:isolation & purification*; D012722:Sewage / Q000737:chemistry*; D012996:Solutions; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D002118:Calcium; D010710:Phosphates; D010758:Phosphorus; D012722:Sewage; D012996:Solutions; D062065:Wastewater; D014874:Water Pollutants, Chemical