改性麦饭石对水中氮磷的去除.pdf

研究论文
改性麦饭石对水中氮磷的去除
陈琳荡,邹华”
(江南大学环境与土木工程学院,江苏无锡214122)
摘要:分别采用加热、羟基铝柱撐和稀土镧对天然麦饭石进行改性,以模拟自然富营券水为处理
对象进行改性麦饭石脱氩除磷实验研究。考察了投加量、pH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氩磷能力显著提高,对氯魚和总
吸附效果最好的是稀土改性麦饭石,其次为柱撑政性麦饭石和热政性麦饭石。pH值为8,麦饭石
投加量为15gL,反应时间为60min条件下,稀土改性麦饭石的氨気和总磷去除率最高,分别达
到89%和75%左右。
关键词:麦饭石;改性;氨;总磷;同步去除
中图分类号:X522文献标志码:A文章编号:1673-1689(2015)03-0283-08
Experimental Study on Removal of Ammonium and Phosphate in Simulation
River Water by Modified Maifan Stone
CHEN Linli. ZOU Hi
(School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China)
Abstract: Heating, hydroxy aluminium and rare earths Ia were adopted to modify the maifan stone
obtained from Shandong Province and the properties of adsorption from simulation river water for
he 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
tot all 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%and
75%, which achieved the highest removal rate
收稿日期:2014-03-26
基金项目:国家水体污染控制与治理科技重大专项(2012ZX07101-013)。
来通倌作者:邹华(1972-),男,江苏无锡人,工学博土,副教授,硕土研究生导师,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:ouhua@jiangnan.edu.cn
会品5す技邦學报2015年第34卷第3期283
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