| 改性粉煤灰处理含铬(Ⅵ)地下水的实验研究 |
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| 引用本文： | 黄玉洁,张焕祯,刘光英.改性粉煤灰处理含铬(Ⅵ)地下水的实验研究[J].环境工程,2012(Z2):20-22,29. |
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| 作者姓名： | 黄玉洁 张焕祯 刘光英 |
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| 作者单位： | 中国地质大学(北京)水资源与环境学院 |
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| 基金项目： | “国家水体污染控制与治理科技重大专项”—南水北调中线总干渠水质安全保障关键技术与工程示范课题(2009ZX07212-003) |
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| 摘 要： | 用硫酸改性的粉煤灰作为吸附剂,处理含铬(Ⅵ)为5mg/L地下水,最佳条件为:pH=2,液固比10000:3,25℃下反应3h。处理后水样铬(VI)浓度0.03mg/L,满足(GB/T 14848-93)《地下水环境质量标准》。在不改变原水pH条件下,增加粉煤灰用量,水样中铬(VI)浓度也可由5mg/L降至0.05mg/L。同时,吸附剂对铬(VI)的吸附符合Freundlich和Langmuir等温线。
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| 关 键 词： | 粉煤灰 硫酸 铬(Ⅵ) 地下水 等温吸附线 |
EXPERIMENT STUDY ON TREATMENT OF CHROMIUM(Ⅵ)-CONTAINING GROUNDWATER BY MODIFIED FLY ASH |
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| Huang Yujie Zhang Huanzhen Liu Guangying.EXPERIMENT STUDY ON TREATMENT OF CHROMIUM(Ⅵ)-CONTAINING GROUNDWATER BY MODIFIED FLY ASH[J].Environmental Engineering,2012(Z2):20-22,29. |
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| Authors: | Huang Yujie Zhang Huanzhen Liu Guangying |
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| Institution: | Huang Yujie Zhang Huanzhen Liu Guangying(School of Water Resources & Environment,China University of Geosciences,Beijing 100083,China) |
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| Abstract: | In this study,fly ash modified with sulfuric acid has been used as an efficient low cost adsorbent to remove the hexavalent chromium from groundwater in which the concentration of hexavalent chromium is 5 mg/L.Maximum chromium removal was found at pH 2.0 in an equilibrium time of 3h,with liquid-to-solid ration of 10000:3 at 25℃.After disposal,the concentration of Cr(VI) in groundwater decreased to 0.03 mg/L,which meet the requirement of quality standard for groundwater(GB/T14848-93).In the constant pH of raw water,the concentration of Cr(Ⅵ) can be decreased to 0.05 mg/L with the initial concentration of 5 mg/L by increasing the dosage of fly ash.The sorption data fitted satisfactorily with Langmuir as well as Freundlich adsorption model. |
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| Keywords: | fly ash sulfuric acid Cr(Ⅵ) groundwater adsorption isotherm |
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