期刊
ENVIRONMENTAL POLLUTION
卷 233, 期 -, 页码 698-705出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2017.10.099
关键词
Phosphorus; Ca decorated sludge carbon; Crystallization; Sorption
资金
- Nature Science Foundations of China [51508116, 4137264, 21407155]
- Nature Science Foundations of Guangdong Province [2016A030310265]
- Science and Technology Research Programs of Guangzhou City [201607010311]
- High level university construction project (Regional water environment safety and water ecological protection)
- Project of Guangdong Provincial Key Laboratory of radioactive contamination control and resources [2012A061400023]
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology [2016K0001]
- Hongkong Scholarship [XJ2016037]
Recovering phosphorus (P) from waste streams takes the unique advantage in simultaneously addressing the crisis of eutrophication and the shortage of P resource. A novel calcium decorated sludge carbon (Ca-SC) was developed from dyeing industry wastewater treatment sludge by decorating calcium (Ca) to effectively adsorb phosphorus from solution. The X-ray diffraction (XRD) and Fourier transform infrared (FTIR) techniques were used to characterize the Ca-SCs, followed by isotherm and kinetic sorption experiments. A preferred design with CaCO3 to sludge mass ratio of 1:2 was found to have a sorption capacity of 116.82 mg/g for phosphorus. This work reveals the crucial role of well-dispersed nano-rod calcium on the Ca-SC surface for the sorption of phosphorus. Moreover, the decoration of nano-rod calcium was found to further promote the uptake of phosphorus through the formation of hydroxyl apatite (Ca-5(PO4)(3)(OH)). Thus, the development of decorated Ca-SC for sorption of phosphorus is very important in solving the P pollution and resource loss. (C) 2017 Elsevier Ltd. All rights reserved.
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