摘要
采用反相乳液聚合法以凹凸棒土为原料,合成了新型NH4+-N吸附剂淀粉-g-丙烯酸/凹凸棒土,并进行了氨氮吸附对比实验。结果表明:凹凸棒土氨氮单位吸附量为4.243 mg/g;淀粉-g-丙烯酸/凹凸棒土氨氮单位吸附量为5.301 mg/g,吸附能力比未改性的凹凸棒土提高了25%。淀粉-g-丙烯酸/凹凸棒土的氨氮吸附过程比凹凸棒土更符合Freundlich等温吸附模型。随着pH、温度的升高,凹凸棒土和淀粉-g-丙烯酸/凹凸棒土对NH4+-N吸附量逐渐增大。
A novel composite adsorbent based on starch and attapulgite for removing NH＋4-N in wastewater was prepared by inverse emulsion polymerization,and comparison of ammonia nitrogen adsorption tests was carried out.The results showed that the adsorption capacity of unmodified attapulgite was 4.243 mg/g,while the adsorption capacity of starch-g-AA/attapulgite at 5.301 mg/g which was higher than the unmodified attapulgite by 25%.Adsorption process of starch-g-AA/attapulgite fitted Freundlich isotherm equation better than that of attapulgite.With the increase of pH and temperature,NH＋4-N adsorption capacity of both attapulgite and starch-g-AA/attapulgite increased.
出处
《环境工程学报》
CAS
CSCD
北大核心
2011年第10期2173-2176,共4页
Chinese Journal of Environmental Engineering
基金
国家高技术研究发展计划(863)项目(2009AA05Z313)
国家自然科学基金项目(50872052)
国家"水专项"课题(2008ZX07101-003-02-05)
江苏省环保课题(2009002)
