炉渣污泥合成陶瓷吸附剂去除饮用水中土臭素的研究

探究了炉渣和污泥高温合成陶瓷吸附剂去除水中土臭素(geosmin,GSM)的能力,结果表明,陶瓷吸附剂对GSM的吸附行为可采用准一级动力学方程来拟合。GSM去除率随着反应时间增加而提高,在10 h接触时间内,陶瓷吸附剂对浓度200 ng L~(-1)和600 ng L~(-1)的GSM去除率分别是81.5%和76.4%。当pH=7,合成陶瓷吸附剂对GSM的去除效果最佳,去除率为82.3%。随着合成陶瓷吸附剂剂量增加,GSM的去除率呈现明显上升的趋势,当合成陶瓷吸附剂的投加量达到2 g L~(-1)时,GSM的去除率最大。Freundlich等温吸附方程模拟合成陶瓷吸附剂的GSM吸附性能优于Langmuir模型。陶瓷吸附剂具有较好pH缓冲性能力和再生性能,经5次再生的陶瓷吸附剂GSM去除率为76.9%。综上所述,合成陶瓷吸附剂GSM去除率高,生产成本低,是一种高效的、可循环使用的绿色GSM吸附剂。

Research on Geosmin Removal by Synthesized Ceramic Adsorbent from Bottom Slag and Sewage Sludge

In this study,the geosmin (GSM) removal ability using synthesized ceramic adsorbent co-sintered from bottom slag and sewage sludge was investigated.Results suggested that GSM adsorption using the synthesized ceramic adsorbent was described by the pseudo-first order model.The GSM removal efficiency enhanced with the increasing of time,and 81.5％ and 76.4％ of GSM at the initial concentration of 200 ng L-1 and 600 ng L-1 was removed after 10 h contact time.The optimum removal efficiency with 82.3％ was at pH of 7.The GSM adsorption capability of synthesized ceramic adsorbent increased with the more doge and the maximum was attained at 2 g L-1.The GSM removal efficiency by synthesized ceramic adsorbent was fitted better with Freundlich model than Langmiur model.Moreover,synthesized ceramic adsorbent had a good pH buffering capacity and regenerated ability and removed 76.9％ GSM after five cycles.In conclusion,the low-cost and high efficient synthesized ceramic adsorbent was a promising green adsorbent to remove GSM.