改性花生壳对酸性橙Ⅱ的吸附影响因素及动力学研究
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摘要
分别采用草酸、乙酸、盐酸对花生壳进行酸化改性,制备得到3种生物吸附剂:草酸改性花生壳(OPS)、乙酸改性花生壳(APS)、盐酸改性花生壳(HPS);将其用于吸附酸性橙Ⅱ,考察了改性剂、改性花生壳粒度、吸附时间、酸性橙Ⅱ溶液pH值、改性花生壳投加量及酸性橙Ⅱ溶液初始浓度等因素对吸附率的影响,初步探讨了吸附动力学。结果表明,改性花生壳对酸性橙Ⅱ的吸附能力较未改性花生壳显著提高,其中HPS的吸附效果最好。在改性花生壳粒度为120目、吸附时间为100min、酸性橙Ⅱ溶液pH值为2.3、改性花生壳投加量为10g·L~(-1)、酸性橙Ⅱ溶液初始浓度为50mg·L~(-1)时,OPS、APS和HPS对酸性橙Ⅱ的吸附率分别为88.6%、92.0%和95.4%。吸附动力学研究表明,改性花生壳对酸性橙Ⅱ的吸附行为符合Lagergren准二级动力学模型,吸附过程主要为化学吸附,且吸附速率常数与改性剂酸度有关。
We prepared three biosorbents OPS,APS,and HPS,which were modified with peanut shell by oxalic acid,acetic acid,and hydrochloric,respectively.Three biosorbents were applied to adsorb acid orangeⅡ.We investigated the effects of modifier,particle size of modified peanut shell,adsorption time,pH value of acid orangeⅡ solution,dosage of modified peanut shell,and initial concentration of acid orangeⅡ solution on the adsorption rate.Meanwhile,we preliminarily discussed the adsorption kinetics.The results showed that the adsorption capacity of modified peanut shell was superior to that of unmodified peanut shell,and HPS was the best one.When particle size of modified peanut shell was 120 mesh,adsorption time was 100 min,pH value of acid orangeⅡ solution was 2.3,dosage of modified peanut shell was 10 g·L~(-1),and initial concentration of acid orangeⅡsolution was 50 mg·L~(-1),the adsorption rates of OPS,APS,and HPS were 88.6%,92.0%,and 95.4%,respectively.The adsorption kinetics indicated that the adsorption behavior of modified peanut shell to acid orangeⅡfollowed the Lagergren pseudo-second order kinetics model,the adsorption process was mainly chemical adsorption,and the adsorption rate constant was associated with the acidity of modifier.
We prepared three biosorbents OPS,APS,and HPS,which were modified with peanut shell by oxalic acid,acetic acid,and hydrochloric,respectively.Three biosorbents were applied to adsorb acid orangeⅡ.We investigated the effects of modifier,particle size of modified peanut shell,adsorption time,pH value of acid orangeⅡ solution,dosage of modified peanut shell,and initial concentration of acid orangeⅡ solution on the adsorption rate.Meanwhile,we preliminarily discussed the adsorption kinetics.The results showed that the adsorption capacity of modified peanut shell was superior to that of unmodified peanut shell,and HPS was the best one.When particle size of modified peanut shell was 120 mesh,adsorption time was 100 min,pH value of acid orangeⅡ solution was 2.3,dosage of modified peanut shell was 10 g·L~(-1),and initial concentration of acid orangeⅡsolution was 50 mg·L~(-1),the adsorption rates of OPS,APS,and HPS were 88.6%,92.0%,and 95.4%,respectively.The adsorption kinetics indicated that the adsorption behavior of modified peanut shell to acid orangeⅡfollowed the Lagergren pseudo-second order kinetics model,the adsorption process was mainly chemical adsorption,and the adsorption rate constant was associated with the acidity of modifier.
引文
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[23]CHAMARTHY S,SEO C W,MARSHALL W E.Adsorption of selected toxic metals by modified peanut shells[J].Journal of Chemical Technology&Biotechnology,2001,76(6):593-597.
[24]柴丽琴,邵建中,周岚,等.栀子黄在棉织物上的染色动力学研究[J].纺织学报,2010,31(9):56-61.
[25]TA爦AR S,KAYA F,ZER A.Biosorption of lead(Ⅱ)ions from aqueous solution by peanut shells:equilibrium,thermodynamic and kinetic studies[J].Journal of Environmental Chemical Engineering,2014,2(2):1018-1026.
[26]GEORGIN J,DOTTOB G L,MAZUTTIB M A,et al.Preparation of activated carbon from peanut shell by conventional pyrolysis and microwave irradiation-pyrolysis to remove organic dyes from aqueous solutions[J].Journal of Environmental Chemical Engineering,2016,4(1):266-275.
[2]张宗绵,刘睿,徐敦明,等.Au@SiO2核壳结构-表面增强拉曼光谱原位检测食品中的酸性橙Ⅱ[J].化学学报,2012,70(16):1686-1689.
[3]贾振兴,郑秀清.BDD电极降解酸性橙Ⅱ染料废水研究[J].水处理技术,2013,39(2):38-45.
[4]廉雨,赖波,周岳溪,等.电芬顿氧化法处理酸性橙Ⅱ模拟废水[J].环境科学研究,2012,25(3):328-332.
[5]XU T,LIU X Q.Peanut shell activated carbon:characterization,surface modification and adsorption of Pb2+from aqueous solution[J].Chinese Journal of Chemical Engineering,2008,16(3):401-406.
[6]李山.改性花生壳对水中重金属离子和染料的吸附特性研究[D].西安:西北大学,2009.
[7]杨国栋.花生壳对水中Cr(Ⅵ)的吸附性能研究[D].兰州:兰州理工大学,2009.
[8]梁东旭,罗春燕,周鑫,等.改性小麦壳对水溶液中Cd2+的吸附研究[J].农业环境科学学报,2015(12):2364-2371.
[9]ACAR F N,EREN Z.Removal of Cu(Ⅱ)ions by activated poplar sawdust(Samsun Clone)from aqueous solutions[J].Journal of Hazardous Materials,2006,137(2):909-914.
[10]周隽,翟建平,吕慧峰,等.木屑和花生壳吸附去除水溶液中Cr3+的试验研究[J].环境污染治理技术与设备,2006,7(1):122-125.
[11]钟璐.核桃壳与花生壳对模拟废水中Cr(Ⅵ)的吸附特性研究[D].上海:华东交通大学,2012.
[12]张翠红,陈志敏,李江,等.玉米秸秆基活性炭的制备及吸附甲基橙性能研究[J].辽宁化工,2015(12):1429-1431.
[13]张彦.玉米秸秆对重金属离子铅的吸附研究[J].化工中间体,2015(12):72-73.
[14]刘云花,胡晖,刘红芝,等.花生饼粕及花生壳烘烤风味分析[J].食品科学,2017,38(2):146-153.
[15]LIU Y,SUN X M,LI B H.Adsorption of Hg2+and Cd2+by ethylenediamine modified peanut shells[J].Carbohydrate Polymers,2010,81(2):335-339.
[16]YUE M,ZHANG M,LIU B,et al.Characteristics of amine surfactant modified peanut shell and its sorption property for Cr(Ⅵ)[J].Chinese Journal of Chemical Engineering,2013,21(11):1260-1268.
[17]赵晖,廖雄,周子强,等.改性农业废弃物花生壳对含铬重金属废水的吸附处理[J].应用化工,2011,40(10):1741-1744.
[18]刘智峰,李旭.改性花生壳吸附废水中Cr(Ⅵ)条件的优选试验[J].安徽农业科学,2010,38(29):16498-16500.
[19]宋应华.硝酸改性花生壳吸附水中Pb2+的过程及机理研究[J].湖南农业科学,2011(5):44-47.
[20]卫新来,鲍孝莹,吴克,等.改性棉铃壳吸附含铬废水研究[J].水处理技术,2016,42(8):36-39.
[21]HUANG G L,YANG C,ZHANG K,et al.Adsorptive removal of copper ions from aqueous solution using cross-linked magnetic chitosan beads[J].Chinese Journal of Chemical Engineering,2009,17(6):960-966.
[22]张庆芳,杨国栋,孔秀琴,等.改性花生壳吸附水中Cr6+的研究[J].化学与生物工程,2008,25(2):29-31.
[23]CHAMARTHY S,SEO C W,MARSHALL W E.Adsorption of selected toxic metals by modified peanut shells[J].Journal of Chemical Technology&Biotechnology,2001,76(6):593-597.
[24]柴丽琴,邵建中,周岚,等.栀子黄在棉织物上的染色动力学研究[J].纺织学报,2010,31(9):56-61.
[25]TA爦AR S,KAYA F,ZER A.Biosorption of lead(Ⅱ)ions from aqueous solution by peanut shells:equilibrium,thermodynamic and kinetic studies[J].Journal of Environmental Chemical Engineering,2014,2(2):1018-1026.
[26]GEORGIN J,DOTTOB G L,MAZUTTIB M A,et al.Preparation of activated carbon from peanut shell by conventional pyrolysis and microwave irradiation-pyrolysis to remove organic dyes from aqueous solutions[J].Journal of Environmental Chemical Engineering,2016,4(1):266-275.