| 改性膨润土颗粒对微污染水中有机物和氨氮的吸附 |
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| 引用本文： | 陈仕稳, 聂锦旭, 谢伟楠, 胡立华, 关文贤. 改性膨润土颗粒对微污染水中有机物和氨氮的吸附[J]. 环境工程学报, 2015, 9(6): 2739-2744. doi: 10.12030/j.cjee.20150632 |
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| 作者姓名： | 陈仕稳 聂锦旭 谢伟楠 胡立华 关文贤 |
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| 作者单位： | 1.广东工业大学土木与交通工程学院, 广州 510006 |
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| 基金项目： | 国家自然科学基金资助项目(51308131) 广东省教育部产学研项目(2012B090400030) |
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| 摘 要： | 采用粘结剂聚乙烯醇(PVA)、造孔剂碳酸氢钠(NaHCO3)和微波强化Al改性膨润土(以下简称M-Al-Bt)制备改性膨润土颗粒(以下简称MBG),研究MBG对微污染水中有机物和氨氮(NH4-N)的吸附效果,考察了不同投加量、反应时间、pH值对腐殖酸(HA)和NH4-N的去除效果影响.结果表明,投加量3 g/L,反应时间20 min,pH=7时,MBG对微污染水中20 mg/L HA和5mg/L NH4-N的去除率分别可达98%和20%以上.HA和NH4-N共存时,存在竞争吸附,HA影响了MBG对NH4-N的去除.
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| 关 键 词： | 改性膨润土颗粒 微污染水 有机物 氨氮 |
| 收稿时间： | 2015-03-20 |
Adsorption of organic matters and ammonia-nitrogen in micro-polluted water by modified bentonite granules |
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| Chen Shiwen, Nie Jinxu, Xie Weinan, Hu Lihua, Guan Wenxian. Adsorption of organic matters and ammonia-nitrogen in micro-polluted water by modified bentonite granules[J]. Chinese Journal of Environmental Engineering, 2015, 9(6): 2739-2744. doi: 10.12030/j.cjee.20150632 |
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| Authors: | Chen Shiwen Nie Jinxu Xie Weinan Hu Lihua Guan Wenxian |
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| Affiliation: | 1.School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China |
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| Abstract: | Modified bentonite granules(MBG) were prepared by using polyvinyl alcohol(PVA) as binder, sodium bicarbonate(NaHCO3) as pore-former and microwave enhanced Al-bentonite(M-Al-Bt) as raw material. The adsorption effect of MBG on organic matters and ammonia-nitrogen(NH4-N) in micro-polluted water was studied. Effects of MBG dosage, adsorption time, pH value on humic acid(HA) and NH4-N were investigated. The results showed that under the following conditions, MBG dosage of 3 g/L, adsorption time of 20 min, pH value of 7, the removal rate of HA and NH4-N were up to 98% and 20%, respectively at HA concentration of 20 mg/L and NH4-N concentration of 5 mg/L in micro-polluted water. There was a competitive adsorption between HA and NH4-N, the removal efficiency of MBG on NH4-N was affected by HA. |
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| Keywords: | modified bentonite granules micro-polluted water organic matters ammonia-nitrogen |
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