| 坡缕石酸活化废液石灰中和法制备LDH的吸附性能研究 |
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| 引用本文： | 冯有亮,陈天虎,庆承松,谌香秀,彭书传.坡缕石酸活化废液石灰中和法制备LDH的吸附性能研究[J].矿物学报,2005,25(2):107-112. |
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| 作者姓名： | 冯有亮 陈天虎 庆承松 谌香秀 彭书传 |
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| 作者单位： | 合肥工业大学,资源与环境工程学院,安徽,合肥,230009 |
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| 基金项目： | 国家自然科学基金（批准号：40472026）. |
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| 摘 要： | 利用坡缕石粘土酸活化废液制备层状双氢氧化物（LDH）可以有效地解决活性白土生产过程产生的废酸液污染。研究了石灰中和坡缕石粘土酸活化废液合成LDH方法，以及制备的LDH材料对CrO^2-4和PO^3-4的吸附作用。结果表明：利用坡缕石粘土酸活化废液合成的LDH对PO^3-4主一的吸附能力比对CrO^2-4吸附能力强，对CrO^2-4、PO^3-4吸附性能接近于国外商品级LDH的性能，CrO^2-4、PO^3-4的吸附等温线符合Freundlich方程，LDH焙烧后对CrO^2-4、PO^3-4吸附能力比焙烧前有很大程度提高。
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| 关 键 词： | 坡缕石 酸性废水处理 层状双氢氧化物 吸附 |
| 文章编号： | 1000-4734（2005）02-0107-06 |
| 收稿时间： | 2004-08-29 |
| 修稿时间： | 2004年8月29日 |
A STUDY ON ADSORPTION PROPERTIES OF SYNTHETIC Mg/Al LDH EMPLOYING WASTEWATER OF PALYGORSKITE CLAY ACTIVATION AND LIME NEUTRALIZATION |
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| FENG You-liang,CHEN Tian-hu,QIN Chen-song,CHEN Xiang-xiu,PENG Shu-chuan.A STUDY ON ADSORPTION PROPERTIES OF SYNTHETIC Mg/Al LDH EMPLOYING WASTEWATER OF PALYGORSKITE CLAY ACTIVATION AND LIME NEUTRALIZATION[J].Acta Mineralogica Sinica,2005,25(2):107-112. |
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| Authors: | FENG You-liang CHEN Tian-hu QIN Chen-song CHEN Xiang-xiu PENG Shu-chuan |
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| Abstract: | Activated fuller's earth, which is acid-treated bentonite or palygorskite clay, is an important material for decolorization in oil and other chemical industries. Palygorskite clay is the major raw material for the production of fuller's earth. A great deal of acidic wastewater that resulted from acid activation of palygorskite clay would severely pollute the environment. On the basis of previous studies of the synthesis and characterization, the properties of adsorbing CrO~(2-)_4 and PO~(3-)_4 of synthetic layer double hydroxide (LDH) employing the acidic wastewater calcined before or after were researched in this paper. The results indicated that the capabilities of adsorbing CrO~(2-)_4 and PO~(3-)_4 by the synthetic LDH are greater than those before calcinations; the capabilities of adsorbing PO~(3-)_4 are greater than those of adsorbing CrO~(2-)_4; the capabilities of adsorbing CrO~(2-)_4 and PO~(3-)_4 are close to those of merchandise LDH from America. Isothermal curves of adsorption for CrO~(2-)_4 and PO~(3-)_4 on the LDH are in accord with the Freundlich Equation. Parameters of Freundlich Equation adsorption for CrO~(2-)_4 are 1/n 0.53 and 0.28, lgK 0.36 and 1.07 before and after calcination, respectively, and 1/n 0.54 and 0.92, lgK (1.21) and (1.61) for PO~(3-)_4 before and after calcination, respectively. |
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