摘要
以天然植物多酚(单宁)为吸持剂,以硫酸铁为沉淀剂,研究了废水pH、初始氨氮浓度、温度、吸附剂投加量等因素对吸持沉淀法去除氨氮的影响。研究结果表明:供试材料的最大吸附量达到13.8 mg·g^(-1),是人造沸石吸附量的2.4倍;在研究设定的投加量范围内,随着投加量的增加,氨氮去除率持续上升,达到16.3%;在试验条件下,供试材料对猪场废水的吸附量达到19.3 mg·g^(-1),是人造沸石的3.3倍,略优于阳离子交换树脂。植物多酚(单宁)吸持硫酸铁沉淀法有望作为一种新方法用于含氨氮废水的快速处理。
Adsorption is a proven means of efficiently removing ammonia nitrogen（ NH4＋ -N ） from wastewater, and natural plant polyphenols are reported as excellent biosorbents for the removal of NH4＋ -N. In the present study, a soluble natural plant polyphenol, tannin, was added into NH4＋ -N-containing wastewater to form a complex compound of plant polyphenol-ammonia, and then this complex compound was pre- cipitated by a precipitant ferric sulfate. Natural plant polyphenol exhibited high adsorption capacity for NH4＋ in piggery wastewater. The ef- fects of pH, initial concentration of NH4＋-N, temperature, and adsorbent dosage on the adsorption of NH4＋-N were investigated. Results showed that complexation capacity of NH4＋-N onto the tested natural plant polyphenol were 13.8 mg .g^-1 in 3 hours, 2.4 times higher than that of zeolite. The efficiency of NH4＋-N removal was increased to 16.3% with an increase in the concentration of natural plant polyphenols. Under the optimum conditions, the adsorption capacity of natural plant polyphenol for NH^-N in piggery wastewater was 19.3 mg＂ g-I which was 3.3 times higher than that of zeolite and slightly better than that of cation exchange resin. Therefore, the natural plant polyphenols pos- sess a high adsorption capacity for NH^-N and can be easily precipitated by ferric sulfate, which is potentially a novel approach to remove NH^-N from wastewater.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2017年第11期2343-2348,共6页
Journal of Agro-Environment Science
基金
国家自然科学基金项目(21477054)~~
关键词
植物多酚
单宁
猪场粪污废水
氨氮
吸持
去除
plant polyphenol
tannin
piggery wastewater
ammonia
complexation
removal
