| 有机酸-铁改性活性炭去除饮用水中的砷 |
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| 引用本文： | 陈维芳,程明涛,张道方,顾雪琼.有机酸-铁改性活性炭去除饮用水中的砷[J].中国环境科学,2011,31(6):910-915. |
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| 作者姓名： | 陈维芳 程明涛 张道方 顾雪琼 |
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| 作者单位： | 上海理工大学环境与建筑学院,上海,200093 |
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| 基金项目： | 上海市科学技术委员会浦江人才计划，上海市教委科研创新项目 |
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| 摘 要： | 利用有机酸(柠檬酸和EDTA)螯合铁加载来改性活性炭,采用动态活性炭小柱进行吸附穿透实验来检测改性后活性炭对砷的吸附能力.研究表明,加载到活性炭上的铁的量随着有机酸和铁浓度增加而增加,在EDTA和铁的浓度分别为0.1mol/L时,活性炭上的铁含量从未加载时的0.24%升至6.18%.改性后的活性炭对砷吸附能力有显著增加,EDTA-Fe改性后的活性炭对As(V)和As(III)穿透时,运行的床体积达到未改性活性炭的10倍.一般情况下,低pH对As(V)的吸附有利.在水体常见pH值范围内(pH 6~9),As(III)的吸附受到影响较小.活性炭上用有机酸螯合法加载的铁大部分以不定形的形式存在,且晶体化效果不明显.
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| 关 键 词： | 活性炭 有机酸 加载铁 砷 饮用水 |
| 收稿时间： | 2010-10-08; |
Granular activated carbon tailored by organic acid-Fe for arsenic removal |
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| CHEN Wei-fang,CHENG Ming-tao,ZHANG Dao-fang,GU Xue-qiong.Granular activated carbon tailored by organic acid-Fe for arsenic removal[J].China Environmental Science,2011,31(6):910-915. |
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| Authors: | CHEN Wei-fang CHENG Ming-tao ZHANG Dao-fang GU Xue-qiong |
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| Affiliation: | CHEN Wei-fang,CHENG Ming-tao ZHANG Dao-fang,GU Xue-qiong(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China) |
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| Abstract: | This research attempted to tailor granular activated carbon(GAC) with organic acid(citric acid and EDTA) and iron.Rapid small-scale column tests(RSSCTs) were set up to appraise the adsorption breakthrough behavior of those modified carbons.Amount of iron thus loaded increased with the increase of organic acid and iron concentration.At concentrations of 0.1 mol/L EDTA and iron respectively,the tailored carbon obtained an iron content of 6.18% as compared to that of 0.24% for virgin GAC.There was remarkable i... |
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| Keywords: | granular activated carbon organic acid iron tailoring arsenic drinking water |
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