Reaction crystallization of struvite from diluted aqueous solutions of phosphate(V) ions in presence of lactic acid

被引：0
|
作者：
Kozik, Anna [1 ]
Matynia, Andrzej [1 ]
Mazienczuk, Agata [1 ]
Piotrowski, Krzysztof [1 ]
机构：
[1] Wroclaw Univ Technol, Inst Technol Nieorganicznej & Nawozew Mineralnych, Wydzial Chem, PL-50370 Wroclaw, Poland
来源：
PRZEMYSL CHEMICZNY | 2011年 / 90卷 / 05期
关键词：
WASTE-WATER; PHOSPHORUS; RECOVERY; REMOVAL;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
MgNH4PO4 center dot 6H(2)O (struvite) was crystd. from dil. aq. solns. of PO43- (1% by mass), Mg2+ and NH4+ ions (mole ratio 1:1:1) in a continuous draft-tube mixed-suspension mixed-product removal reactor in presence of MeCH(OH)COOH (0.03 or 0.06% by mass) at varying pH (8.5-10) and residence time (900-3600 s). The addn. of lactic acid resulted in an improvement of struvite crystal quality. The mean crystal size was 24-74 mu m. The max. crystal size was achieved at pH 8.5-9.0 and residence time 3600 s at the lowest nucleation rate 5.6.10(7) 1/(s.m(3)) and linear crystal-phase growth rate 6.11.10(-9)-2.23.10(-8) m/s.
引用
收藏
页码：857 / 861
页数：5
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