Details

Autor(en) / Beteiligte

• Zhao, Tong-gang
• Wu, De-yi
• Chen, Jian-gang
• Kong, Hai-nan
• Zhang, Bao-hua
• Wang, Zao-sheng

Titel

Study on characteristics of simultaneous removal of ammonium and phosphate from waste water by zeolitized fly ash

Ist Teil von

• Huanjing kexue, 2006-04, Vol.27 (4), p.696

Ort / Verlag

China

Erscheinungsjahr

2006

Quelle

MEDLINE

Beschreibungen/Notizen

• Characteristics of simultaneous removal of ammonium and phosphate from wastewater by zeolite synthesized from fly ash was investigated. The amount of ammonium and phosphate removed by zeolitized fly ash changed with time, and approached to a constant value after adsorption time of 24h was reached. The amount of ammonium and phosphate removed also increased with the rise in the amount of zeolite added, but slackened above the solid/liquid ratio of 8 g x L(-1). The removal rate of ammonium by zeolitized fly ash could rise to the maximum value of 60% when pH was between 7 and 9, and declined out of the pH range. For phosphate, minimum removal rate of about 85% was obtained within pH 7-9, and the removal rate increased to about 100% out of the pH range. The adsorption of ammonium on zeolitized fly ash was an exothermic reaction; the removal rate of ammonium could decrease with the rise in temperature. On the contrary, the adsorption of phosphate was an endothermic reaction, and the rise in temperature favored the