煤系高岭土改性制备陶粒吸附剂及其对Cr(Ⅵ)的吸附性能
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摘要
以煤系高岭土、消石灰和炭粉为原料,制备出一种陶粒吸附剂,用于对污水中Cr(Ⅵ)的去除,探究废液pH、初始浓度等对吸附效果的影响。结果表明,该陶粒吸附剂吸附性能良好,在40℃,pH=6,浓度180 mg/L,吸附剂用量16 g/L,吸附240 min时,陶粒对Cr~(6+)的吸附量为7.58 mg/g,回收后可通过解吸再次利用,同时筒压强度为7.76 MPa,可作为优质人造轻集料,具有良好的应用前景。
Using coal series kaolinite,hydrated lime and carbon powder as raw material,the ceramsite adsorbent were prepared for Cr(Ⅵ) removal in wastewater.The influence of the effluent pH,initial concentration of Cr(Ⅵ) and other experimental conditions on adsorption effect were investigated.The result showed that the adsorption performance was good,at 40 ℃,pH=6,the concentration was 180 mg/L,the adsorption content 16 g/L,when adsorb for 240 min,the adsorption capacity 7.58 mg/g and the ceramsite adsorbent could be used again by desorption.At the same time for the cylinder strength was 7.76 MPa,the ceramsite adsorbent had a good application prospect as the quality of artificial light aggregate.
Using coal series kaolinite,hydrated lime and carbon powder as raw material,the ceramsite adsorbent were prepared for Cr(Ⅵ) removal in wastewater.The influence of the effluent pH,initial concentration of Cr(Ⅵ) and other experimental conditions on adsorption effect were investigated.The result showed that the adsorption performance was good,at 40 ℃,pH=6,the concentration was 180 mg/L,the adsorption content 16 g/L,when adsorb for 240 min,the adsorption capacity 7.58 mg/g and the ceramsite adsorbent could be used again by desorption.At the same time for the cylinder strength was 7.76 MPa,the ceramsite adsorbent had a good application prospect as the quality of artificial light aggregate.
引文
[1] 张雪彦,金灿,刘贵锋,等.重金属离子吸附材料的研究进展[J].生物质化学工程,2017,51(1):51-58.
[2] Owlad M,Aroua M K,Ashri W D W,et al.Removal of hexavalent chromium-contaminated water and wastewater:A review[J].Water Air & Soil Pollution,2009,200(1/2/3/4):59-77.
[3] 吴茂江.铬与人体健康[J].微量元素与健康研究,2014,31(4):72-73.
[4] Hu L L.Coal gangue and its application research in building materials[J].Materials Science Forum,2016(873):96-104.
[5] 杨帆,郭振华,梁亚超,等.改性高岭土的研究及在水处理中的应用[J].环境保护与循环经济,2016,36(8):46-48.
[6] 莫宗云,马腾飞,王大光.偏高岭土活性研究进展[J].硅酸盐通报,2017,36(1):110-115.
[7] Li Y,Yao Y,Liu X,et al.Improvement on pozzolanic reactivity of coal gangue by integrated thermal and chemical activation[J].Fuel,2013,109(7):527-533.
[8] Wang C M,Wang J,Yang L R.Research on performance of cement with kiln dust-activated coal gangue[J].Key Engineering Materials,2009,405/406:191-196.
[9] Dong Z,Xia J,Fan C,et al.Activity of calcined coal gangue fine aggregate and its effect on the mechanical behavior of cement mortar[J].Construction & Building Materials,2015,100(17):63-69.
[10] 韩静云,宋旭艳,郜志海.化学增钙与热复合活化煤矸石的性能研究[J].非金属矿,2011,34(3):9-12.
[2] Owlad M,Aroua M K,Ashri W D W,et al.Removal of hexavalent chromium-contaminated water and wastewater:A review[J].Water Air & Soil Pollution,2009,200(1/2/3/4):59-77.
[3] 吴茂江.铬与人体健康[J].微量元素与健康研究,2014,31(4):72-73.
[4] Hu L L.Coal gangue and its application research in building materials[J].Materials Science Forum,2016(873):96-104.
[5] 杨帆,郭振华,梁亚超,等.改性高岭土的研究及在水处理中的应用[J].环境保护与循环经济,2016,36(8):46-48.
[6] 莫宗云,马腾飞,王大光.偏高岭土活性研究进展[J].硅酸盐通报,2017,36(1):110-115.
[7] Li Y,Yao Y,Liu X,et al.Improvement on pozzolanic reactivity of coal gangue by integrated thermal and chemical activation[J].Fuel,2013,109(7):527-533.
[8] Wang C M,Wang J,Yang L R.Research on performance of cement with kiln dust-activated coal gangue[J].Key Engineering Materials,2009,405/406:191-196.
[9] Dong Z,Xia J,Fan C,et al.Activity of calcined coal gangue fine aggregate and its effect on the mechanical behavior of cement mortar[J].Construction & Building Materials,2015,100(17):63-69.
[10] 韩静云,宋旭艳,郜志海.化学增钙与热复合活化煤矸石的性能研究[J].非金属矿,2011,34(3):9-12.