蒙脱石-钢渣复合吸附颗粒对水中Cd~(2+)的吸附及其它离子的影响研究
|
摘要
以蒙脱石和钢渣为原料,采用工业淀粉作为添加剂制备蒙脱石-钢渣复合吸附颗粒,探究其对水中Cd~(2+)的吸附性能及其机理.研究结果表明,蒙脱石占复合吸附颗粒质量比为50%时,对Cd~(2+)的吸附性能最好.质量比为1∶1的蒙脱石-钢渣复合吸附颗粒在用量为15g·L~(-1)和pH值为5.5～6.5时,吸附效果最佳.在温度为25℃,pH为5.6时,1.5g质量比为1∶1的蒙脱石-钢渣复合颗粒对浓度为100mg·L~(-1)的Cd~(2+)溶液(100mL)吸附60min后,废水中Cd~(2+)的吸附率达到97.47%.通过二级动力学方程拟合复合吸附颗粒对Cd~(2+)的吸附反应,相关系数为0.998 0.吸附颗粒对水中Cd~(2+)的吸附等温式符合Langmuir方程,相关系数为0.974 5,Cd~(2+)的饱和吸附量达到9.76mg·g~(-1).Cu~(2+)和Pb~(2+)对废水中Cd~(2+)的吸附具有竞争影响,可以降低其吸附量,且Pb~(2+)的影响较大.
Taking montmorillonite and slag as raw materials,the composite adsorbent was prepared using industry starch as an additive to study the adsorptive property of Cd~(2+).The results show that the adsorption performance reaches the optimal when montmorillonite in the proportion of composite adsorbent was 50%.The best condition of 1∶1 montmorillonite-slag composite particle is that the absorbent dosage with 15 g·L~(-1),pH value from 5.5 to 6.5.The Cd~(2+) removal rate reached 97.47%in solution with 100 mg/L Cd~(2+) concentration(1.5 g composite particle)with 60 min in the condition of 25 ℃ and5.6 pH value.The adsorption process of composite particle for Cd~(2+) could be well simulated by pseudosecond-order kinetics equation(R~2=0.996 0).The adsorption reaction is in line with the Langmuir model with coefficient of 0.974 5,and the maximum adsorption capacity is 9.76 mg·g~(-1).Further analysis showed that Cu~(2+) and Pb~(2+) have the competitive effect on Cd~(2+) adsorption,which resulted in the decrease of adsorption quantity.And the competitive influence of Pb~(2+) is stronger than Cu~(2+).
Taking montmorillonite and slag as raw materials,the composite adsorbent was prepared using industry starch as an additive to study the adsorptive property of Cd~(2+).The results show that the adsorption performance reaches the optimal when montmorillonite in the proportion of composite adsorbent was 50%.The best condition of 1∶1 montmorillonite-slag composite particle is that the absorbent dosage with 15 g·L~(-1),pH value from 5.5 to 6.5.The Cd~(2+) removal rate reached 97.47%in solution with 100 mg/L Cd~(2+) concentration(1.5 g composite particle)with 60 min in the condition of 25 ℃ and5.6 pH value.The adsorption process of composite particle for Cd~(2+) could be well simulated by pseudosecond-order kinetics equation(R~2=0.996 0).The adsorption reaction is in line with the Langmuir model with coefficient of 0.974 5,and the maximum adsorption capacity is 9.76 mg·g~(-1).Further analysis showed that Cu~(2+) and Pb~(2+) have the competitive effect on Cd~(2+) adsorption,which resulted in the decrease of adsorption quantity.And the competitive influence of Pb~(2+) is stronger than Cu~(2+).
引文
[1]殷云皓,张志刚,张平,等.钢渣对铅蓄电池厂含铅模拟废水动态吸附特性[J].水处理技术,2016,42(5):63-67.Yin Yunhao,Zhang Zhigang,Zhang Ping,et al.Characteristics of steel slag dynamic adsorption of Pb2+in simulated lead-acid battery factory wastewater[J].Technology of Water Treatment,2016,42(5):63-67.(in Chinese)
[2]李瑞月,陈德,李恋卿,等.不同作物秸秆生物炭对溶液中Pb2+、Cd2+的吸附[J].农业环境科学学报,2015,34(5):1001-1008.Li Ruiyue,Chen De,Li Lianqing,et al.Adsorption of Pb2+and Cd2+in aqueous solution by biochars derived from different crop residues[J].Journal of AgroEnvironment Science,2015,34(5):1001-1008.(in Chinese)
[3]Singh J,Ali A,Prakash V.Removal of lead(II)from synthetic and batteries wastewater using agricultural residues in batch/column mode[J].International Journal of Environmental Science&Technology,2014,11(6):1759-1770.
[4]Gajdaa I,Stinchcombea A,Greenmana J,et al.Microbial fuel cell-A novel self-powered wastewater electrolyser for electrocoagulation of heavy metals[J].Internal Journal of Hydrogen Energy,2017,42(3):1813-1819.
[5]陈晓,侯文华,汪群慧.电炉钢渣对水中Cu2+、Cd2+和Pb2+的去除作用[J].环境科学,2009,30(10):2940-2945.Chen Xiao,HouWenhua,Wang Qunhui.Removal of metal ions Cu2+,Cd2+and Pb2+from solutions by sorption on slag[J].Environmental Science,2009,30(10):2940-2945.(in Chinese)
[6]田犀卓,金兰淑,应博,等.钢渣-蒙脱石复合吸附剂对水中Cd2+的吸附去除[J].环境科学学报,2015,35(1):207-214.Tian Xizhuo,Jin Lanshu,Ying Bo,et al.Adsorption of Cd2+from aqueous solution by steel slag-montmorillonite composite adsorbent[J].Acta Scientiae Circumstantiae,2015,35(1):207-214.(in Chinese)
[7]程芳琴,高瑞,宋慧平.改性钢渣处理低浓度氨氮废水[J].环境工程学报,2012,6(11):4027-4033.Cheng Fangqin,GaoRui,Song Huiping.Treatment of low concentration ammonia nitrogen wastewater with modified steel slag[J].Chinese Journal of Environmental Engineering,2012,6(11):4027-4033.(in Chinese)
[8]刘崇敏,黄益宗,于方明,等.改性沸石及添加CaCl2和MgCl2对重金属离子Pb2+吸附特性的影响[J].环境化学,2013,32(5):803-809.Liu Chongmin,Huang Yizong,Yu Fangming,et al.Adsorption of aqueous Pb(II)by natural and modified zeolite and the effect of CaCl2and MgCl2[J].Environmental Chemistry,2013,32(5):803-809.(in Chinese)
[9]Zhu Z K,Tao L,Li F B.Effects of dissolved organic matter on adsorbed Fe(Ⅱ)reactivity for the reduction of 2-nitrophenlo in TiO2 suspensions[J].SciVerseScienceDirect,2013,93:29-34.
[10]吴亚琪,徐畅,赵越,等.硅酸钙-壳聚糖聚合物制备及其对重金属废水的吸附特性[J].环境化学,2016,35(3):562-567.Wu Yaqi,Xu Chang,Zhao Yue,et al.Preparation of calcium silicate-chitosan polymer and the adsorptive removal of heavy metals in wastewater[J].Environmental Chemistry,2016,35(3):562-567.(in Chinese)
[11]Wang S Y,Tang Y K,Li K,et al.Combined performance of biochar sorption and magnetic separation processes for treatment of chromium-contained electroplating wastewater[J].Bioresource Technology,2014,174(174):67-73.
[12]郝硕硕,朱家亮,黄慧,等.改性沸石对Cd(II)的吸附平衡及动力学[J].环境工程学报,2012,6(8):2693-2697.Hao Shuoshuo,Zhu Jialiang,Huang Hui,et al.Cd(II)adsorption equilibrium and kinetics by modified zeolites[J].Chinese Journal of Environmental Engineering,2012,6(8):2693-2697.(in Chinese)
[13]张路遥,南忠仁,郑玉祥.改性钢渣对镉离子吸附特征的研究[J].环境科学与技术,2015,38(8):228-233.Zhang Luyao,Nan Zhongren,ZhengYuxiang.Adsorption characteristic of Cd2+by modified slag[J].Environmental Science&Technology,2015,38(8):228-233.(in Chinese)
[14]张之介,邓勇,赵增迎,等.蒙脱石对Co2+吸附机理和性能研究[J].环境科学与技术,2013,36(6L):167-170.Zhang Zhijie,Deng Yong,Zhao Zengying,et al.Adsorption mechanism and performance of cobalt ion by Montmorillonite[J]. Environmental Science&Technology,2013,36(6L):167-170.(in Chinese)
[2]李瑞月,陈德,李恋卿,等.不同作物秸秆生物炭对溶液中Pb2+、Cd2+的吸附[J].农业环境科学学报,2015,34(5):1001-1008.Li Ruiyue,Chen De,Li Lianqing,et al.Adsorption of Pb2+and Cd2+in aqueous solution by biochars derived from different crop residues[J].Journal of AgroEnvironment Science,2015,34(5):1001-1008.(in Chinese)
[3]Singh J,Ali A,Prakash V.Removal of lead(II)from synthetic and batteries wastewater using agricultural residues in batch/column mode[J].International Journal of Environmental Science&Technology,2014,11(6):1759-1770.
[4]Gajdaa I,Stinchcombea A,Greenmana J,et al.Microbial fuel cell-A novel self-powered wastewater electrolyser for electrocoagulation of heavy metals[J].Internal Journal of Hydrogen Energy,2017,42(3):1813-1819.
[5]陈晓,侯文华,汪群慧.电炉钢渣对水中Cu2+、Cd2+和Pb2+的去除作用[J].环境科学,2009,30(10):2940-2945.Chen Xiao,HouWenhua,Wang Qunhui.Removal of metal ions Cu2+,Cd2+and Pb2+from solutions by sorption on slag[J].Environmental Science,2009,30(10):2940-2945.(in Chinese)
[6]田犀卓,金兰淑,应博,等.钢渣-蒙脱石复合吸附剂对水中Cd2+的吸附去除[J].环境科学学报,2015,35(1):207-214.Tian Xizhuo,Jin Lanshu,Ying Bo,et al.Adsorption of Cd2+from aqueous solution by steel slag-montmorillonite composite adsorbent[J].Acta Scientiae Circumstantiae,2015,35(1):207-214.(in Chinese)
[7]程芳琴,高瑞,宋慧平.改性钢渣处理低浓度氨氮废水[J].环境工程学报,2012,6(11):4027-4033.Cheng Fangqin,GaoRui,Song Huiping.Treatment of low concentration ammonia nitrogen wastewater with modified steel slag[J].Chinese Journal of Environmental Engineering,2012,6(11):4027-4033.(in Chinese)
[8]刘崇敏,黄益宗,于方明,等.改性沸石及添加CaCl2和MgCl2对重金属离子Pb2+吸附特性的影响[J].环境化学,2013,32(5):803-809.Liu Chongmin,Huang Yizong,Yu Fangming,et al.Adsorption of aqueous Pb(II)by natural and modified zeolite and the effect of CaCl2and MgCl2[J].Environmental Chemistry,2013,32(5):803-809.(in Chinese)
[9]Zhu Z K,Tao L,Li F B.Effects of dissolved organic matter on adsorbed Fe(Ⅱ)reactivity for the reduction of 2-nitrophenlo in TiO2 suspensions[J].SciVerseScienceDirect,2013,93:29-34.
[10]吴亚琪,徐畅,赵越,等.硅酸钙-壳聚糖聚合物制备及其对重金属废水的吸附特性[J].环境化学,2016,35(3):562-567.Wu Yaqi,Xu Chang,Zhao Yue,et al.Preparation of calcium silicate-chitosan polymer and the adsorptive removal of heavy metals in wastewater[J].Environmental Chemistry,2016,35(3):562-567.(in Chinese)
[11]Wang S Y,Tang Y K,Li K,et al.Combined performance of biochar sorption and magnetic separation processes for treatment of chromium-contained electroplating wastewater[J].Bioresource Technology,2014,174(174):67-73.
[12]郝硕硕,朱家亮,黄慧,等.改性沸石对Cd(II)的吸附平衡及动力学[J].环境工程学报,2012,6(8):2693-2697.Hao Shuoshuo,Zhu Jialiang,Huang Hui,et al.Cd(II)adsorption equilibrium and kinetics by modified zeolites[J].Chinese Journal of Environmental Engineering,2012,6(8):2693-2697.(in Chinese)
[13]张路遥,南忠仁,郑玉祥.改性钢渣对镉离子吸附特征的研究[J].环境科学与技术,2015,38(8):228-233.Zhang Luyao,Nan Zhongren,ZhengYuxiang.Adsorption characteristic of Cd2+by modified slag[J].Environmental Science&Technology,2015,38(8):228-233.(in Chinese)
[14]张之介,邓勇,赵增迎,等.蒙脱石对Co2+吸附机理和性能研究[J].环境科学与技术,2013,36(6L):167-170.Zhang Zhijie,Deng Yong,Zhao Zengying,et al.Adsorption mechanism and performance of cobalt ion by Montmorillonite[J]. Environmental Science&Technology,2013,36(6L):167-170.(in Chinese)
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |