以竹为原料,采用氢氧化钾活化-炭化一步法制备竹活性炭。通过扫描电镜、比表面积BET、X射线衍射仪对竹活性炭进行表征,以竹活性炭对亚甲基蓝吸附值和碘吸附值为考察指标,通过改变浸渍碱浓度、浸渍比、浸渍时间及活化炭化温度来探究其对竹活性炭吸附性的影响。结果表明:当浸渍碱浓度为40%、竹碱浸渍比为1∶4、浸渍时间为24h、活化时间为1h、活化温度为800℃时,制得的竹活性炭比表面积达1270m2/g,亚甲基蓝吸附值达到495mg/g,碘吸附值达到1353mg/g。该方法将活化和炭化同时进行,有效地降低了成本,且制备的竹活性炭对亚甲基蓝和碘有较高的吸附性,为工业污染废水的处理提供一种废水吸附剂,具有良好的环保和经济效益。
Bamboo was used as raw material to prepare activated carbon by potassium hydroxide method activation.The bamboo-activated carbon was characterized by SEM,BET and XRD.Taking adsorption value of bamboo-activated carbon for methylene blue and iodine as indexes,the influences of processing parameters including the concentration of impregnation alkali,impregnation ratio,impregnation time and activation carbonization temperature on the adsorbability of bamboo-activated carbon were investigated.The results showed that the specific surface area of activated carbon reached to 1270m2/g,the adsorption capacity of methylene blue was 495mg/g and the adsorption capacity of iodine rose to 1353mg/g when concentration of impregnation alkali,impregnation ratio,impregnation time,activation time and temperature were 40%,1∶4,24h,1h and 800℃,respectively.Bamboo was activated and carbonized simultaneously,which effectively reduced the cost.The bamboo-activated carbon possessed high adsorption for methylene blue and iodine and could be taken as a wastewater adsorbent for the treatment of industrial pollution wastewater,which benefitted to both environment and economy.
[1] 马致昌,郭成军,王明杰.废水综合利用的优化改造[J].中国氯碱,2021(4):40-42,48.
[2] 徐绘,雷亚芳,冯宏伟.磷酸活化软木制备活性炭[J].化工科技,2020,28(5):26-29.
[3] Gao Y,Yue Q,Li A.Insight into activated carbon from different kinds of chemical activating agents:a review[J].Science of the Total Environment,2020,746:141094.
[4] 微生物技术降解竹子在制浆源头实现无污染造纸[J].纸和造纸,2018,37(2):72.
[5] 苏靖程,李晗,范方宇,等.油茶壳活性炭对西番莲废水色素的吸附性能[J].应用化工,2021,50(6):1576-1581.
[6] 蒙冕武,齐丛亮,刘庆业,等.甘蔗叶活性炭的制备工艺优化及表征[J].材料导报,2014,28(18):46-50.
[7] Li C J,Xia M,Xia D S.Mechanism study on denitration by new PMS modified bamboo charcoal bifunctional photocatalyst[J].Chemical Engineering Journal,2017,316:544-552.
[8] Sangeetha Piriya R,Jayabalakrishnan R M,Maheswari M.Coconut shell derived ZnCl2 activated carbon for malachite green dye removal[J].Water Science and Technology,2021,83(5):1167-1182.
[9] Khandaker S,Toyohara Y,Kuba T.Adsorptive removal of cesium from aqueous solution using oxidized bamboo charcoal[J].Water Resources and Industry,2018,19:35-46.
[10] 张庆民,温海波,王洪良,等.水处理用活性炭改性研究[J].油气田环境保护,2021,31(1):32-36,42.
[11] 吴有龙,徐嘉龙,马中青,等.KOH活化法制备气化稻壳活性炭及其吸附性能[J].生物质化学工程,2021,55(1):31-38.
[12] 高健磊,翁伟,闫怡新,等.改良CASS城镇污水厂处理高比例工业废水的运行[J].工业水处理,2021,41(3):125-128,136.
[13] 许伟,孙康,缪存标,等.水蒸气活化制备竹质成型活性炭及其对二硫化碳的吸附性能[J].林业工程学报,2018,3(2):40-46.
[14] 张晓燕,王桂仙,张启伟.微波加热条件下竹材的化学炭化及吸附性能[J].广东化工,2013,40(9):27-28.
[15] 崔丹丹,蒋剑春,孙康,等.高比表面积竹质活性炭的制备与性能研究[J].林产化学与工业,2010,30(5):57-60.
[16] 常颖萃.硝酸镍催化活化法制备竹活性炭[J].福建林业科技,2020,47(4):26-30.
[17] 张文标,章卫钢,等.竹粉活性炭的制备及性能研究[J].竹子研究汇刊,2010,29(4):36-41.
[18] Long H M,Huang B F,Liu L P.Physicochemical properties of coconut husk activated carbonmodified by Fe(NO3)3 and Mn(NO3)2[J].Journal of Iron and Steel Research International,2021,28(5):530-537.
[19] 吐尔逊·吐尔洪,苏比努尔·吾麦尔江,阿不都热依木·卡德尔,等.葡萄树基活性炭的制备及其CO2吸附特性[J].环境科学研究,2021,34(7):1621-1629.
[20] 谢浩,徐卫华,谭小飞,等.磁性粒子固定简青霉吸附处理Cd2+-苯酚复合污染废水的研究[J].水处理技术,2016,42(2):56-58,62.
基金资助
四川省科技计划项目(2020YFN0150)
PDF
