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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ren, Hongqiang Wang, Yanru Xu, Ke Yu, Rongtai Geng, Jinju |
| Description | Author Affiliation: Yu R ( State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.) |
| Abstract | The dry pyrolysis of magnesium ammonium phosphate (MAP) with NaOH powder for ammonium release was investigated, as well as the utility of MAP pyrolysate recycling. The identities of the MAP pyrolysate and its derivatives were experimentally validated. The results showed that the pyrolysate was amorphous magnesium hydrogen phosphate (MgHPO4) and magnesium pyrophosphate (Mg2P2O7). The best molar ratio of sodium hydroxide (NaOH) powder to ammonium was 1:1, at 110°C for 3h. The optimum pH for pyrolysate recycling was 9.5. The ammonia removal ratio could be maintained above 80% with MAP pyrolysate recycling. Seed crystal inoculation increased the rate of MAP crystallization by 20.86%, as well as the MAP grain size (2.08nm with seeding versus 1.72nm without). MAP particle size with NaOH treatment decreased: d(0.5)=19.34µm versus d(0.5)=30.35µm for direct pyrolysis. The results demonstrated that crystal growth was controlled by adding NaOH during MAP pyrolysis. |
| ISSN | 09608524 |
| Volume Number | 132 |
| e-ISSN | 18732976 |
| Journal | Bioresource Technology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-03-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Fertilizers Analysis Hot Temperature Magnesium Compounds Chemistry Phosphates Quaternary Ammonium Compounds Isolation & Purification Waste Disposal, Fluid Methods Water Pollutants, Chemical Water Purification Chemical Precipitation Crystallization Sodium Hydroxide Spectroscopy, Fourier Transform Infrared X-ray Diffraction Journal Article Research Support, Non-u.s. Gov't Discipline Bioresource |
| Content Type | Text |
| Resource Type | Article |
| Subject | Waste Management and Disposal Medicine Environmental Engineering Renewable Energy, Sustainability and the Environment Bioengineering |
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