DOI: 10.1016/j.watres.2018.05.035
Scopus记录号: 2-s2.0-85047982679
论文题名: Interaction of calcium, phosphorus and natural organic matter in electrochemical recovery of phosphate
作者: Lei Y. ; Song B. ; Saakes M. ; van der Weijden R.D. ; Buisman C.J.N.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 10
结束页码: 17
语种: 英语
英文关键词: Buffer
; Calcium phosphate
; Co-precipitation
; Electrochemical precipitation
; Natural organic matter
Scopus关键词: Biogeochemistry
; Calcium phosphate
; Eutrophication
; Organic compounds
; Phosphorus
; Precipitation (chemical)
; Recovery
; Buffer
; Different effects
; ELectrochemical methods
; Electrochemical precipitation
; Electrochemical recovery
; Electrolysis time
; Natural organic matters
; Precipitation process
; Biological materials
; buffer
; calcium
; calcium phosphate
; natural organic matter
; phosphorus
; water
; Article
; chemical interaction
; electrochemistry
; electrolysis
; pH
; precipitation
; priority journal
; surface property
; time
; volume
; waste component removal
; waste water management
英文摘要: To address the issues of eutrophication and the potential risk of phosphorus (P) shortage, it is essential to remove and recover P from P-containing streams to close this nutrient cycle. Electrochemical induced calcium phosphate (CaP) precipitation was shown to be an efficient method for P recovery. However, the influence of natural organic matter (NOM) is not known for this treatment. In this paper, the behavior of NOM and its effect on CaP precipitation was studied. In contrast to studies where NOM hindered CaP precipitation, results show that the interaction of NOM with CaP improves the removal of P, independent of the types of NOM. The P removal at the average increased from 43.8 ± 4.9% to 58.5 ± 1.2% in the presence of 1.0 mg L−1 NOM. Based on the yellow color of the CaP product, NOM is co-precipitated. The bulk solution pH with and without buffers has totally different effects on the precipitation process. Without buffer, CaP precipitates on the cathode surface in a wide pH range (pH 4.0–10.0). However, the precipitation process is completely inhibited when the bulk solution is buffered at pH 4.0 and 6.0. This is probably due to neutralization of OH− by the buffers. Regardless of the presence or absence of NOM and solution pH, the recovered products are mainly amorphous CaP unless the electrolysis time was increased to seven days with 4.0 A m−2, in which crystalline CaP formed. These findings advance our understanding on the interaction of Ca, P and NOM species for the application of electrochemical method for P recovery from real wastewater. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112637
Appears in Collections: 气候减缓与适应
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作者单位: Wetsus, Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, Leeuwarden, 8900CC, Netherlands; Sub-department Environmental Technology, Wageningen University and Research, P.O. Box 17, Wageningen, 6700AA, Netherlands
Recommended Citation:
Lei Y.,Song B.,Saakes M.,et al. Interaction of calcium, phosphorus and natural organic matter in electrochemical recovery of phosphate[J]. Water Research,2018-01-01,142