| 不同类型LDHs覆膜改性人工湿地生物陶粒基质脱氮效果研究 |
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| 引用本文： | 张翔凌,阮聪颖,黄华玲,郭露,陈巧珍,徐舟影.不同类型LDHs覆膜改性人工湿地生物陶粒基质脱氮效果研究[J].环境科学学报,2015,35(10):3178-3184. |
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| 作者姓名： | 张翔凌 阮聪颖 黄华玲 郭露 陈巧珍 徐舟影 |
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| 作者单位： | 1. 武汉理工大学土木工程与建筑学院市政工程系, 武汉 430070;2. 武汉理工大学城镇供水与水污染控制技术研究中心, 武汉 430070,武汉理工大学土木工程与建筑学院市政工程系, 武汉 430070,武汉理工大学土木工程与建筑学院市政工程系, 武汉 430070,武汉理工大学土木工程与建筑学院市政工程系, 武汉 430070,武汉理工大学土木工程与建筑学院市政工程系, 武汉 430070,1. 武汉理工大学土木工程与建筑学院市政工程系, 武汉 430070;2. 武汉理工大学城镇供水与水污染控制技术研究中心, 武汉 430070 |
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| 基金项目： | 国家自然科学基金项目(No.31270573, 31400435) |
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| 摘 要： | 在碱性条件下采用水热-共沉淀法,对二价金属化合物CaCl2、MgCl2、ZnCl2与三价金属化合物FeCl3、AlCl3、CoCl3按两两组合方式生成9种不同类型的LDHs,并分别对人工湿地常用的生物陶粒基质进行覆膜改性;构建模拟基质试验柱,对改性前后的生物陶粒基质进行城市污水的脱氮净化效果研究.结果表明,相对于原始生物陶粒基质,大多数改性基质对CODCr、总氮和氨氮的去除效果均有不同程度的提高,经所有基质处理后的出水中硝态氮浓度均呈上升趋势;Zn2+参与合成的LDHs改性基质对总氮、氨氮有较好的处理效果,其中ZnFe-LDHs和ZnCoLDHs对TN的去除率接近60%,对氨氮的去除率超过92%,这两种改性基质对污水中的氨氮转化为硝态氮具有促进作用.
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| 关 键 词： | 人工湿地 生物陶粒基质 覆膜改性 脱氮效果 ZnFe-LDHs ZnCo-LDHs |
| 收稿时间： | 2015/1/31 0:00:00 |
| 修稿时间： | 4/2/2015 12:00:00 AM |
Removal of nitrogen in the simulated constructed wetland systems with modified biological ceramsite substrate coated with layered double hydroxides synthesized from different metal compounds |
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| ZHANG Xiangling,RUAN Congyin,HUANG Hualing,GUO Lu,CHEN Qiaozhen and Xu Zhouying.Removal of nitrogen in the simulated constructed wetland systems with modified biological ceramsite substrate coated with layered double hydroxides synthesized from different metal compounds[J].Acta Scientiae Circumstantiae,2015,35(10):3178-3184. |
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| Authors: | ZHANG Xiangling RUAN Congyin HUANG Hualing GUO Lu CHEN Qiaozhen and Xu Zhouying |
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| Institution: | 1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070;2. Research Center of Urban Water Supply and Contaminated Water Control Technology, Wuhan University of Technology, Wuhan 430070,School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070,School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070,School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070,School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070 and 1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070;2. Research Center of Urban Water Supply and Contaminated Water Control Technology, Wuhan University of Technology, Wuhan 430070 |
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| Abstract: | Nine kinds of layered double hydroxides (LDHs) were synthesized with co-precipitated method under alkaline condition using trivalent metal compounds (FeCl3, AlCl3 and CoCl3) and divalent metal compounds (CaCl2, MgCl2 and ZnCl2).Using the modified biological ceramsite substrate coated with different synthesized LDHs, the simulated test columns were constructed to treat the urban sewage. The results showed that, compared with control (using biological ceramsite as the substrates), the removal efficiencies of CODCr, total nitrogen and ammonia nitrogen in most simulated test columns using modified biological ceramsite were improved. The modified biological ceramsite synthesized by Zn2+ showed better removal efficiency in total nitrogen and ammonia nitrogen. Especially, when modified biological ceramsite substrates coated with ZnFe-LDHs and ZnCo-LDHs were used, the average removal efficiencies were close to 60% for total nitrogen and over 92% for ammonia nitrogen, respectively. |
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| Keywords: | constructed wetland biological ceramsite substrate coated modification nitrogen removal efficiency ZnFe-LDHs ZnCo-LDHs |
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