PMID- 27054736
OWN - NLM
STAT- MEDLINE
DCOM- 20160614
LR  - 20221207
IS  - 0273-1223 (Print)
IS  - 0273-1223 (Linking)
VI  - 73
IP  - 7
DP  - 2016
TI  - Evaluation of the role of inherent Ca(2+) in phosphorus removal from wastewater 
      system.
PG  - 1644-51
LID - 10.2166/wst.2015.642 [doi]
AB  - The role of inherent Ca(2+) in phosphorus removal from wastewater was evaluated 
      by batch tests. Precipitates were characterized by an X-ray diffractometer (XRD), 
      Fourier transform infrared spectrophotometer (FT-IR) and scanning electron 
      microscope with an energy dispersive spectrometer (EDS) system. Effects of 
      inherent Ca(2+) on phosphorus removal through basic oxygen furnace slag (BOFS) 
      were also analyzed. The results show that upon adjusting the pH to higher than 
      7.0, inherent Ca(2+) can remove phosphorus from wastewater and form Ca-P 
      precipitates. Residual phosphorus exhibited a linear decreasing trend with 
      increasing the pH from 7.0 to 10.0 and then remained unchanged at higher pH than 
      10.0. EDS determined that the precipitates contained the elements Ca, P and O. 
      FT-IR spectra demonstrated that the functional groups of precipitates involved 
      PO4(3-), OH(-) and CO3(2-). XRD indicated that the precipitates may consist of 
      CaCO3 and some Ca-P phosphates such as CaHPO4, Ca4H(PO4)3, Ca3(PO4)2, and 
      Ca5(PO4)3(OH). During the removal process of phosphorus by BOFS, due to the 
      presence of inherent Ca(2+) in wastewater, the removal efficiency and rate of 
      phosphorus increased by 15.5% and by a factor of about 3.0, respectively.
FAU - Han, Chong
AU  - Han C
AD  - School of Metallurgy, Northeastern University, Shenyang 110819, China E-mail: 
      hanch@smm.neu.edu.cn.
FAU - Wang, Zhen
AU  - Wang Z
AD  - School of Metallurgy, Northeastern University, Shenyang 110819, China E-mail: 
      hanch@smm.neu.edu.cn.
FAU - Wu, Qianqian
AU  - Wu Q
AD  - School of Metallurgy, Northeastern University, Shenyang 110819, China E-mail: 
      hanch@smm.neu.edu.cn.
FAU - Yang, Wangjin
AU  - Yang W
AD  - School of Metallurgy, Northeastern University, Shenyang 110819, China E-mail: 
      hanch@smm.neu.edu.cn.
FAU - Yang, He
AU  - Yang H
AD  - School of Metallurgy, Northeastern University, Shenyang 110819, China E-mail: 
      hanch@smm.neu.edu.cn.
FAU - Xue, Xiangxin
AU  - Xue X
AD  - School of Metallurgy, Northeastern University, Shenyang 110819, China E-mail: 
      hanch@smm.neu.edu.cn.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Water Sci Technol
JT  - Water science and technology : a journal of the International Association on 
      Water Pollution Research
JID - 9879497
RN  - 0 (Phosphates)
RN  - 0 (Waste Water)
RN  - 27YLU75U4W (Phosphorus)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - S88TT14065 (Oxygen)
RN  - SY7Q814VUP (Calcium)
SB  - IM
MH  - Calcium/*chemistry
MH  - Calcium Carbonate/chemistry
MH  - Oxygen
MH  - Phosphates/*chemistry
MH  - Phosphorus/*chemistry
MH  - Spectroscopy, Fourier Transform Infrared
MH  - Waste Disposal Facilities
MH  - Wastewater/*chemistry
MH  - Water Purification
EDAT- 2016/04/08 06:00
MHDA- 2016/06/15 06:00
CRDT- 2016/04/08 06:00
PHST- 2016/04/08 06:00 [entrez]
PHST- 2016/04/08 06:00 [pubmed]
PHST- 2016/06/15 06:00 [medline]
AID - 10.2166/wst.2015.642 [doi]
PST - ppublish
SO  - Water Sci Technol. 2016;73(7):1644-51. doi: 10.2166/wst.2015.642.