盐酸改性凹凸棒对含铬废水的处理
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摘要
用不同浓度盐酸改性凹凸棒,以提高凹凸棒的吸附性能。通过(X射线衍射仪) XRD、(比表面积分析) BET和(红外光谱仪) FTIR等实验技术及吸附含铬离子废水来表征凹凸棒石的性能。并考察盐酸浓度、吸附时间、凹凸棒土投入量和水样pH值等因素对吸附性能的影响。结果表明:用6mol·L-1盐酸改性的凹凸棒比表面积最大,达到125.66m2·g-1,其吸附性能最好;处理废水的最佳工艺条件为:投入量1.0 g·L-1、吸附时间2h、pH值为7时去除率可以达到90%以上。
Acid-treated modification of attapulgite was studied to promote its adsorption capability.The attapulgite were characterized by XRD BET FT-IR techniques and were used to deal with Cr~(6+) in wastewater.The influence of hydrochloric acid concentration contact time amount of attapulgite clay and pH value on the performance of adsorption was investigated.The results showed attapulgite treated has the best adsorption capacity and special surface area when the hydrochloric acid concentration temperature is 6mol·L-1 the maximum surface area of 125.66 m2·g-1 was achieved.the adsorption rate of Cr~(6+) in wastewater over passed 90% when the dosage attapulgite clay is 1.0g·L-1,contact time is 2 h and pH=7.
Acid-treated modification of attapulgite was studied to promote its adsorption capability.The attapulgite were characterized by XRD BET FT-IR techniques and were used to deal with Cr~(6+) in wastewater.The influence of hydrochloric acid concentration contact time amount of attapulgite clay and pH value on the performance of adsorption was investigated.The results showed attapulgite treated has the best adsorption capacity and special surface area when the hydrochloric acid concentration temperature is 6mol·L-1 the maximum surface area of 125.66 m2·g-1 was achieved.the adsorption rate of Cr~(6+) in wastewater over passed 90% when the dosage attapulgite clay is 1.0g·L-1,contact time is 2 h and pH=7.
引文
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[15]付君善,王萍,夏德强.盐酸改性凹凸棒粘土对Al3+的吸附研究[J].水资源与水工程学报,2008,27(04):62-64.
[2]刘月,郑水林,高如琴.酸浸处理对凹凸棒石黏土性能的影响[J].非金属矿,2009,32(1):57-59.
[3]代伟伟,刘义新.安徽明光凹凸棒土盐酸改性前后的矿物学特征及其孔结构[J].矿物学报,2005,25(4):393-398.
[4]郑建东,常彬彬,吴霖生.高温改性凹凸棒石对Cr(Ⅵ)的吸附研究[J].化工新材料,2012,40(12):76-78.
[5]廖启林,刘聪,朱伯万.凹凸棒石调控Cd污染土壤的作用及其效果[J].中国地质,2014,41(5):1693-2704.
[6]岳新莲,焦天阳.盐酸活化凹凸棒对废水中Cr6+的吸附性能的研究[J].徐州工程学院学报(自然科学版),2009,24(1):51-55.
[7]王冰鑫,雷西萍.有机改性凹凸棒石及其应用研究进展[J].硅酸盐通报,2015,34(3):738-743.
[8]于志新,逯子扬,赵晓红.凹凸棒土改性及其在环境水处理中的应用研究[J].硅酸盐通报,2010,29(6):1367-1373.
[9]熊余,刘月,郑水林.凹凸棒石黏土的酸洗提纯工艺研究[J].非金属矿,2009,32(2):43-57.
[10]陈浩,王爱勤.改性凹凸棒粘土悬浮稳定性的研究[J].中国矿业,2007,16(4):99-100.
[11]王茂元,孙杰,姜中海.改性凹凸棒土对Mo(Ⅵ)的吸附性能研究[J].化学研究与应用,2009,21(5):630-631.
[12]关媛,王少莽,易广.酸化凹凸棒石的制备及其对苯胺的吸附性能[J].常州大学学报,2017,29(6):15-25.
[13]张良,姚超,丁永红.凹凸棒土有机改性的研究[J].涂料工业,2007,37(11):41-43.
[14]张莉莉.酸改性凹凸棒土对含酚模拟废水的吸附性能研究[J].淮阴师范学院学报(自然科学版),2006,5(4):300-307.
[15]付君善,王萍,夏德强.盐酸改性凹凸棒粘土对Al3+的吸附研究[J].水资源与水工程学报,2008,27(04):62-64.