紫外分光光度法研究木质素及其系列酯处理含铬酸废水
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摘要
为了使木质素变废为宝,同时减轻日益严重的水污染问题,以木质素及其酯为吸附剂处理铬酸废水,以期实现以废治废的目的。通过紫外分光光度法研究了不同木质素及其酯处理铬酸废水的工艺和效果。结果表明:木质素处理铬酸废水的较佳工艺为木质素用量0. 4 g/100 m L废水,溶液p H=2,45℃处理4 h。碱木质素对铬酸根的吸附能力较强;酶解木质素、木质素马来酸酯、木质素丁二酸酯为吸附剂时,随着用量的增加,对铬酸根的吸附量增加。而木质素乙酯、木质素丙酯随着用量的增加,吸附量先减小后增加。木质素类型及酯化率差异导致木质素吸附铬酸根的吸附位点数不同,吸附铬酸根离子能力也不同。同类酯的吸附特征相似。木质素的吸附性能与其羟基含量和颗粒结构密切相关。
In order to make full use of the wasted lignin and reduce the wastewater pollution,ultraviolet spectrophotometry as an analysis method,lignin and its esters were used as adsorbents to treat the wastewater containing chromate ion. The results show that when wastewater is treated under 45 ℃ for 4 h with a lignin dosage of 0. 4 g/100 m L wastewater and solution pH of 2,the adsorption effect is the optimal. The adsorption of alkali lignin on chromate ions is very strong. When enzymatic hydrolysis lignin,maleated lignin,succinylated lignin are used as adsorbents,the adsorption ability increases with the increase of dosage. However,acetylated lignin and propionylated lignin are somewhat abnormal. As the dosage increasesing,the adsorption capacity decreases first and then increases. The adsorption sites are affected by types and esterification degree of lignin. The same type of lignin esters have similar adsorption capabilities. The adsorbability of lignin closely associates with its hydroxyl group content and granular structure.
In order to make full use of the wasted lignin and reduce the wastewater pollution,ultraviolet spectrophotometry as an analysis method,lignin and its esters were used as adsorbents to treat the wastewater containing chromate ion. The results show that when wastewater is treated under 45 ℃ for 4 h with a lignin dosage of 0. 4 g/100 m L wastewater and solution pH of 2,the adsorption effect is the optimal. The adsorption of alkali lignin on chromate ions is very strong. When enzymatic hydrolysis lignin,maleated lignin,succinylated lignin are used as adsorbents,the adsorption ability increases with the increase of dosage. However,acetylated lignin and propionylated lignin are somewhat abnormal. As the dosage increasesing,the adsorption capacity decreases first and then increases. The adsorption sites are affected by types and esterification degree of lignin. The same type of lignin esters have similar adsorption capabilities. The adsorbability of lignin closely associates with its hydroxyl group content and granular structure.
引文
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9陈润华.铁碳材料的制备及其处理典型重金属配合物和含氧酸根废水的研究[D].长沙:中南大学,2013Chen Runhua.Research on iron-carbon material for the removal of typical heavy metal complexes and oxacid root pollutants in wastewater[D].Changsha:Zhongnan University,2013
10范娟,詹怀宇,刘明华.木质素基吸附材料的研究进展[J].中国造纸学报,2004,19(2):181-187Fan Juan,Zhan Huaiyu,Liu Minghua.Progress in research on lignin-based adsorption material[J].Transactions of China Pulp and Paper,2004,19(2):181-187
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12 Zhao X H,Huang Z Q,Zhang Y J,et al.Efficient solid-phase synthesis of acetylated lignin and a comparison of the properties of different modified lignins[J].Journal of Applied Polymer Science,2017,134(1):44276
13王振川,杨建民,王春旭.以试亚铁灵为指示剂测定乙二醇的含量[J].河北科技大学学报,1987(1):110-112Wang Zhenchuan,Yang Jianmin,Wang Chunxu.Determination of ethylene glycol with trimethylide as indicator[J].Hebei University of Science and Technology,1987(1):110-112
14张灵敏,刘畅.木质素类吸附剂的研究进展[J].中华纸业,2017(22):24-28Zang Lingmin,Liu Chang.Progress on reseach of lignin-based sorbents[J].China Pulp&Paper Indursty,2017(22):24-28
2 Hu Q.Chemical modification,properties,and usage of lignin[M].New York:Springer US,2002
3 Carter F S,Mcdonald A G.Chemical and thermal characterization of three industrial lignins and their corresponding lignin esters[J].Bioresources,2010,5(2):990-1009
4刘延湘,黄彪,张丽.花生壳生物炭对水中重金属Cr6+、Cu2+的吸附研究[J].科学技术与工程,2017,17(13):81-85Liu Yanxian,Huang Biao,Zhang Li.Adsorption of heavy metal Cr6+and Cu2+in aqueous solutions by peanut shell biochar[J].Science Technology and Engineering,2017,17(13):81-85
5任孟杰,夏强,周妍,等.改性木质素吸附重金属离子的研究与应用进展[J].化学工业与工程技术,2013,34(6):55-58Ren Mengjie,Xia Qiang,Zhou Yan,et al.Research and application progress of the adsorption to heavy metal ions with modified lignin[J].Journal of Chemical Industry&Engineering,2013,34(6):55-58
6邱学青,李浩,邓永红,等.酚羟基对木质素吸附层致密程度的影响[J].高分子学报,2014(9):1281-1285Qiu Xueqing,Li Hao,Deng Yonghong,et al.Influences of hydroxyl groups on the compactness of lignin adsorption layer[J].Acta Polymerica Sinica,2014(9):1281-1285
7何莼,李忠,赵桢霞,等.低成本木质素吸附剂对废水中Pb2+吸附性能的研究[J].离子交换与吸附,2006,22(6):481-488He Chun,Li Zhong,Zhao Zhenxia,et al.Adsorption proerties of a low-cost lignin adsorbent for removal of heavy meatal ions Pb2+[J].Ion Exchange and Adsorption,2006,22(6):481-488
8张雪彦,金灿,刘贵锋,等.希夫碱型木质素基吸附材料的制备及其对Pb2+吸附性能研究[J].离子交换与吸附,2017(5):403-415Zhang Xueyan,Jin Can,Liu Guifeng,et al.Preparation of schiff base-modified-lignin adsorbent and its adsorption performance of Pb2+[J].Ion Exchange and Adsorption,2017(5):403-415
9陈润华.铁碳材料的制备及其处理典型重金属配合物和含氧酸根废水的研究[D].长沙:中南大学,2013Chen Runhua.Research on iron-carbon material for the removal of typical heavy metal complexes and oxacid root pollutants in wastewater[D].Changsha:Zhongnan University,2013
10范娟,詹怀宇,刘明华.木质素基吸附材料的研究进展[J].中国造纸学报,2004,19(2):181-187Fan Juan,Zhan Huaiyu,Liu Minghua.Progress in research on lignin-based adsorption material[J].Transactions of China Pulp and Paper,2004,19(2):181-187
11赵路阳,任滨侨,金玉,等.改性木质素吸附六价铬离子的研究[J].黑龙江科学,2015(6):30-31Zhao Luyang,Ren Binqiao,Jin Yu,et al.Research on modified lignin adsorption of hexavalent chromium ion in water[J].Heilongjiang Science,2015(6):30-31
12 Zhao X H,Huang Z Q,Zhang Y J,et al.Efficient solid-phase synthesis of acetylated lignin and a comparison of the properties of different modified lignins[J].Journal of Applied Polymer Science,2017,134(1):44276
13王振川,杨建民,王春旭.以试亚铁灵为指示剂测定乙二醇的含量[J].河北科技大学学报,1987(1):110-112Wang Zhenchuan,Yang Jianmin,Wang Chunxu.Determination of ethylene glycol with trimethylide as indicator[J].Hebei University of Science and Technology,1987(1):110-112
14张灵敏,刘畅.木质素类吸附剂的研究进展[J].中华纸业,2017(22):24-28Zang Lingmin,Liu Chang.Progress on reseach of lignin-based sorbents[J].China Pulp&Paper Indursty,2017(22):24-28
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