摘要
分别采用加热、羟基铝柱撑和稀土镧对天然麦饭石进行改性,以模拟自然富营养水为处理对象进行改性麦饭石脱氮除磷实验研究。考察了投加量、p H值,以及反应时间等因素对改性麦饭石吸附性能的影响。并通过BET、SEM和XRD对改性前后麦饭石结构进行了研究,探讨了麦饭石的改性机理。结果表明,不同改性方法都能使麦饭石去除氮磷能力显著提高,对氨氮和总磷吸附效果最好的是稀土改性麦饭石,其次为柱撑改性麦饭石和热改性麦饭石。p H值为8,麦饭石投加量为15 g/L,反应时间为60 min条件下,稀土改性麦饭石的氨氮和总磷去除率最高,分别达到89%和75%左右。
Heating,hydroxy aluminium and rare earths La were adopted to modify the maifan stone obtained from Shandong Province and the properties of adsorption from simulation river water for the maifan stone were studied.the effects of adsorbent dosage,pH and reaction time on the adsorptive property of modified maifan stone were studied.Besides,through the BET,SEM and XRD,the structure and the mechanism of property modification were discussed,and also the adsorptive capability of the maifan stone in removing nitrogen and phosphorus was investigated.The results indicated that the modification by heating,hydroxy aluminium and rare earths La could significantly increase the adsorption capacity of the modified maifan stone for ammonia nitrogen and total phosphorus.Rare earths La had the best modification effect and followed by hydroxy aluminium and heating.Simultaneously,The experimental results showed that with the pH 8,the total dosage 15 g/L and the reaction time 60 minutes,the removal efficiency of ammonia nitrogen and total phosphorus of maifan stone modified by rare earths La will respectively be about 89% and75%,which achieved the highest removal rate.
出处
《食品与生物技术学报》
CAS
CSCD
北大核心
2015年第3期283-290,共8页
Journal of Food Science and Biotechnology
基金
国家水体污染控制与治理科技重大专项(2012ZX07101-013)
关键词
麦饭石
改性
氨氮
总磷
同步去除
maifan stone
modification
ammonia nitrogen
total phosphorus
simultaneous removal
作者简介
通信作者：邹华（1972-），男，江苏无锡人，工学博士，副教授，硕士研究生导师，主要从事天然水体富营养化治理技术和废水处理及资源化技术研究。E-mail：zouhua@jiangnan．edu．cn
