模拟胃环境下柚子黄皮纤维素对Pb~(2+)的吸附性能
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摘要
【目的】研究柚子黄皮纤维素在模拟人体胃环境下对Pb~(2+)的吸附效果,为开发廉价的功能性排铅产品提供理论参考。【方法】以柚子黄皮为原料,提取柚子黄皮纤维素,在模拟人体胃环境下,以Pb~(2+)吸附量和去除率为考察指标,分析人工胃液pH、吸附时间、柚子黄皮纤维素添加量、Pb~(2+)初始质量浓度对Pb~(2+)吸附效果的影响,探索最佳的吸附条件,并研究柚子黄皮纤维素对Pb~(2+)的吸附平衡及吸附动力学特性,通过红外光谱分析柚子黄皮纤维素与Pb~(2+)作用的基团。【结果】柚子黄皮纤维素对Pb~(2+)的最佳吸附条件为:柚子黄皮纤维素添加量1.0g/L,Pb~(2+)初始质量浓度20mg/L,胃液pH为5,吸附240min达到吸附平衡,在此条件下Pb~(2+)的最大吸附量为(0.662±0.013)mg/g,去除率为(94.83±0.705)%;用准二级动力学模型可以较好地拟合柚子黄皮纤维素的吸附过程,表明其对Pb~(2+)的吸附以化学吸附为主。红外光谱分析表明,-OH是影响柚子黄皮纤维素吸附Pb~(2+)的主要基团。【结论】柚子黄皮纤维素对Pb~(2+)具有一定的吸附作用,可用来开发人体排铅产品。
【Objective】The adsorption of Pb~(2+)on yellow pomelo peel cellulose was studied in simulated human gastric environment to provide reference for developing cheap and functional lead-removing products.【Method】Cellulose was extracted from yellow pomelo peel.Using Pb~(2+)adsorbing capacity and removal rate as indicators,the effects of pH of the gastric environment,adsorption time,adsorbent dosage and initial concentration of Pb~(2+),on Pb~(2+)adsorption capacity of yellow pomelo peel cellulose were analyzed in simulated human gastric environment.Adsorption equilibrium and kinetics were also investigated,and the functional groups bonding with Pb~(2+)on yellow pomelo peel cellulose were characterized using an infrared spectrometer.【Result】The optimal adsorption conditions were adsorbent dosage of yellow pomelo peel cellulose 1.0 g/L,Pb~(2+)initial concentration 20 mg/L,pH of gastric juice 5 and time to adsorption equilibrium 240 minutes.The maximum adsorption capacity of Pb~(2+)was(0.662±0.013)mg/g,and the removal rate was(94.83±0.705)% under these conditions.The pseudo-second-order kinetics model fitted well with the adsorption process,suggesting that the main process was chemical adsorption.The infrared spectrum indicated that-OH was the main group of yellow pomelo peel cellulose for adsorbing Pb~(2+).【Conclusion】Yellow pomelo peel cellulose had certain adsorption effects on Pb~(2+),and can be used to remove Pb~(2+)from human body.
【Objective】The adsorption of Pb~(2+)on yellow pomelo peel cellulose was studied in simulated human gastric environment to provide reference for developing cheap and functional lead-removing products.【Method】Cellulose was extracted from yellow pomelo peel.Using Pb~(2+)adsorbing capacity and removal rate as indicators,the effects of pH of the gastric environment,adsorption time,adsorbent dosage and initial concentration of Pb~(2+),on Pb~(2+)adsorption capacity of yellow pomelo peel cellulose were analyzed in simulated human gastric environment.Adsorption equilibrium and kinetics were also investigated,and the functional groups bonding with Pb~(2+)on yellow pomelo peel cellulose were characterized using an infrared spectrometer.【Result】The optimal adsorption conditions were adsorbent dosage of yellow pomelo peel cellulose 1.0 g/L,Pb~(2+)initial concentration 20 mg/L,pH of gastric juice 5 and time to adsorption equilibrium 240 minutes.The maximum adsorption capacity of Pb~(2+)was(0.662±0.013)mg/g,and the removal rate was(94.83±0.705)% under these conditions.The pseudo-second-order kinetics model fitted well with the adsorption process,suggesting that the main process was chemical adsorption.The infrared spectrum indicated that-OH was the main group of yellow pomelo peel cellulose for adsorbing Pb~(2+).【Conclusion】Yellow pomelo peel cellulose had certain adsorption effects on Pb~(2+),and can be used to remove Pb~(2+)from human body.
引文
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[18]龙小平,罗琳,易建龙,等.壳聚糖对Sb(Ⅲ)的吸附动力学和热力学研究[J].环境研究与监测,2014,27(1):13-16.Long X P,Luo L,Yi J L,et al.Adsorption kinetic and thermodynamic studies of chitosan or Sb(Ⅲ)[J].Environmental Study and Monitoring,2014,27(1):13-16.
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[21]Li Z Z,Tang X W,Chen Y M,et al.Activation of firmiana simplex leaf and the enhanced Pb(Ⅱ)adsorption performance:equilibrium and kinetic studies[J].Journal of Hazardous Materials,2009,169(1):386-394.
[22]Tang Q,Tang X W,Hu M M,et al.Removal of Cd(Ⅱ)from aqueous solution with activated firmiana simplex leaf:behaviors and affecting factors[J].Journal of Hazardous Materials,2010,179(1):95-103.
[23]杨乐萍,欧阳小琨,杨立业,等.竹木质纤维素吸附水溶液中铅离子的研究[J].浙江海洋学院学报(自然科学版),2014,33(1):97-99.Yang L P,Ouyang X K,Yang L Y,et al.Adsorption of Pb(Ⅱ)from aqueous solution on bamboo lignocellulose[J].Journal of Zhejiang Ocean University(Natural Science Edition),2014,33(1):97-99.
[24]吕玉桦,石小飞,刘珊渡,等.我国0~6岁儿童血铅水平及流行特征分析[J].实用预防医学,2015,22(2):149-154.LüY H,Shi X F,Liu S D,et al.Analysis of blood lead level and its epidemiological characteristics in children aged 0-6years in China[J].Practical Preventive Medicine,2015,22(2):149-154.
[25]王清萍,蔡晓奕,金晓英,等.稻米壳吸附去除废水中的铜离子和铅离子[J].环境保护与循环经济,2009,29(9):39-43.Wang Q P,Cai X Y,Jin X Y,et al.Rice husk adsorption removal of copper and lead ions in wastewater[J].Environmental Protection and Circular Economy,2009,29(9):39-43.
[26]赵颖华,李登新.改性膨胀石墨对含铅废水吸附特性[J].环境工程学报,2012,6(10):3613-3617.Zhao Y H,Li D X.Adsorption characteristics of modified expanded graphite to wastewater containing lead[J].Chinese Journal of Environmental Engineering,2012,6(10):3613-3617.
[27]高雁斐,满兆红,都启晶,等.鸡源嗜铅菌JT1菌株体外吸附铅的机理[J].中国食品学报,2017,17(1):12-19.Gao Y F,Man Z H,Du Q J,et al.Mechanism of lead binding of lead-resistant bacteria JT1 invitro[J].China Food Journal,2017,17(1):12-19.
[28]蒋广震,张永静,张定东,等.硅酸盐矿物体外吸附剂对饲料铅的吸附效果及其对福瑞鲤生长的影响[J].南京农业大学学报,2016,39(6):996-1002.Jiang G Z,Zhang Y J,Zhang D D,et al.Silicate adsorbent on absorption of Pb2+and effects of dietary supplement of silicate adsorbent on FFRC strain common carp[J].Journal of Nanjing Agricultural University,2016,39(6):996-1002.
[29]徐瑞生.人体胃液中盐酸功过的探讨[J].化学与生活,1995(11):26.Xu R S.Discussion on the merits of hydrochloric acid in human gastric juice[J].Education in Chemistry,1995(11):26.
[30]李海云,王秀丽.荔枝壳水不溶性膳食纤维吸附NO-2、胆酸钠的研究[J].食品研究与开发,2006,27(8):167-169.Li H Y,Wang X L.Study on the adsorptive ability for nitrite by the water-insoluble dietary fibre from igchee shell[J].Food Research and Development,2006,27(8):167-169.
[2]Toplan S,Ozcelik D,Gulysasar T,et al.Trace elements[J].Medical Biology,2004,18(2):178-182.
[3]闫文强,叶政德.人体血铅检测方法的比较[J].中国误诊学杂志,2009,9(1):38.Yan W Q,Ye Z D.Comparison of human blood lead detection methods[J].Chinese Journal of Misdiagnostics,2009,9(1):38.
[4]韦友欢,黄秋婵.铅对人体健康的危害效应及其防治途径[J].微量元素与健康研究,2008,25(4):62-63.Wei Y H,Huang Q C.The toxicological effect of lead on the human health and its measures of preventing[J].Studies of Trace Elements and Health,2008,25(4):62-63.
[5]庞明利,杨海军.功能食品中膳食纤维的排铅功能研究进展[J].中国食品工业,2011(7):49-50.Pang M L,Yang H J.Research progress on lead function of dietary fiber in functional foods[J].China Food Industry,2011(7):49-50.
[6]朱国君.排铅功能性食品研究进展[J].粮食与油脂,2007(11):46-49.Zhu G J.Research progress of lead-removing functional food[J].Cereals and Oils,2007(11):46-49.
[7]Barakat M A.New trends in removing heavy metals from industrial wastewater[J].Arabian Journal of Chemistry,2011,4(4):361-377.
[8]罗均,葛静微,杨晓波,等.改性柚皮纤维素对Pb2+的吸附动力学研究[J].食品科学,2010,31(3):87-90.Luo J,Ge J W,Yang X B,et al.Adsorption kinetics of modified pomelo peel cellulose towards lead ions[J].Food Science,2010,31(3):87-90.
[9]朱琳,顾冬雨,李敏晶,等.龙须菜纤维素去除水中铬(Ⅵ)离子的研究[J].广州化工,2017(1):56-58.Zhu L,Gu D Y,Li M J,et al.Study on removal of Cr(Ⅵ)from aqueous solutions using Gracilaria lemaneiformis cellulose[J].Guangzhou Chemical Industry,2017(1):56-58.
[10]吕爱超,刘彦明,李苗苗,等.改性杨絮纤维素对重金属离子的吸附[J].大连工业大学学报,2017,36(2):120-123.LüA C,Liu Y M,Li M M,et al.Adsorption of heavy metal ions by modified populus cellulose[J].Journal of Dalian Polytechnic University,2017,36(2):120-123.
[11]唐文清,曾荣英,冯泳兰,等.柠檬酸改性柚子皮纤维素对废水中铜离子的吸附[J].过程工程学报,2012,12(5):776-780.Tang W Q,Zeng R Y,Feng Y L,et al.Adsorption of Cu2+from aqueous solution by polyacid modified shaddock shin[J].The Chinese Journal of Process Engineering,2012,12(5):776-780.
[12]Anonymous.The United States Pharmacopeia 23,simulated gastric fluid and simulated intestinal fluid,TS[M].Rockville:The United States Pharmacopeial Convention,Inc.,1995.
[13]李伟.Pb(Ⅱ)-XO-CTAMB光度法测定化妆品中的铅含量[J].化学分析计量,2005,14(6):35-36.Li W.Determination of lead(Ⅱ)in cosmetics by the photometry of Pb(Ⅱ)-XO-CTAMB[J].Chemical Analysis and Meterage,2005,14(6):35-36.
[14]倪平.改性柚皮纤维素的制备及其对金属离子Cd2+的吸附研究[D].武汉:华中农业大学,2011.Ni P.Studies on the cadmium(Ⅱ)adsorption of the modification of cellulose from pomelo peel[D].Wuhan:Huazhong Agricultural University,2011.
[15]齐亚凤,何正艳,余军霞,等.改性甘蔗渣对Cu2+和Zn2+的吸附机理[J].环境工程学报,2013,7(2):585-590.Qi Y F,He Z Y,Yu J X,et al.Adsorption mechanism for Cu2+and Zn2+by modified bagasse[J].Chinese Journal of Enviornmental Engineering,2013,7(2):585-590.
[16]赵巍,刘凡,冯雄汉,等.水钠锰矿吸附Pb2+亚结构变化的红外光谱研究[J].地球化学,2011,40(1):99-107.Zhao W,Liu F,Feng X H,et al.FTIR study on the variance of substructure of birnessite before and after Pb2+adsorption[J].Geochimica,2011,40(1):99-107.
[17]王保贵.污水深度处理方法去除二级出水有机物(EfOM)的效能及其缓解超滤膜污染研究[D].北京:北京工业大学,2013.Wang B G.Wastewater advanced treatment for the removal of Effluent Organic Matter(EfOM)and their efficiency for alleviating ultrafiltration membrane fouling[D].Beijing:Beijing University of Technology,2013.
[18]龙小平,罗琳,易建龙,等.壳聚糖对Sb(Ⅲ)的吸附动力学和热力学研究[J].环境研究与监测,2014,27(1):13-16.Long X P,Luo L,Yi J L,et al.Adsorption kinetic and thermodynamic studies of chitosan or Sb(Ⅲ)[J].Environmental Study and Monitoring,2014,27(1):13-16.
[19]齐亚凤,何正艳,余军霞,等.改性甘蔗渣对Pb2+、Cd2+的吸附行为研究[J].环境科学与技术,2012,35(10):58-61.Qi Y F,He Z Y,Yu J X,et al.Modified sugarcane bagasse for adsorption of Pb2+and Cd2+[J].Environmental Science and Technology,2012,35(10):58-61.
[20]Ho Y S,Ofomaja A E.Pseudo-second-order model for lead ion sorption from aqueous solutions onto palm kernel fiber[J].Journal of Hazardous Materials,2006,129(1):137-142.
[21]Li Z Z,Tang X W,Chen Y M,et al.Activation of firmiana simplex leaf and the enhanced Pb(Ⅱ)adsorption performance:equilibrium and kinetic studies[J].Journal of Hazardous Materials,2009,169(1):386-394.
[22]Tang Q,Tang X W,Hu M M,et al.Removal of Cd(Ⅱ)from aqueous solution with activated firmiana simplex leaf:behaviors and affecting factors[J].Journal of Hazardous Materials,2010,179(1):95-103.
[23]杨乐萍,欧阳小琨,杨立业,等.竹木质纤维素吸附水溶液中铅离子的研究[J].浙江海洋学院学报(自然科学版),2014,33(1):97-99.Yang L P,Ouyang X K,Yang L Y,et al.Adsorption of Pb(Ⅱ)from aqueous solution on bamboo lignocellulose[J].Journal of Zhejiang Ocean University(Natural Science Edition),2014,33(1):97-99.
[24]吕玉桦,石小飞,刘珊渡,等.我国0~6岁儿童血铅水平及流行特征分析[J].实用预防医学,2015,22(2):149-154.LüY H,Shi X F,Liu S D,et al.Analysis of blood lead level and its epidemiological characteristics in children aged 0-6years in China[J].Practical Preventive Medicine,2015,22(2):149-154.
[25]王清萍,蔡晓奕,金晓英,等.稻米壳吸附去除废水中的铜离子和铅离子[J].环境保护与循环经济,2009,29(9):39-43.Wang Q P,Cai X Y,Jin X Y,et al.Rice husk adsorption removal of copper and lead ions in wastewater[J].Environmental Protection and Circular Economy,2009,29(9):39-43.
[26]赵颖华,李登新.改性膨胀石墨对含铅废水吸附特性[J].环境工程学报,2012,6(10):3613-3617.Zhao Y H,Li D X.Adsorption characteristics of modified expanded graphite to wastewater containing lead[J].Chinese Journal of Environmental Engineering,2012,6(10):3613-3617.
[27]高雁斐,满兆红,都启晶,等.鸡源嗜铅菌JT1菌株体外吸附铅的机理[J].中国食品学报,2017,17(1):12-19.Gao Y F,Man Z H,Du Q J,et al.Mechanism of lead binding of lead-resistant bacteria JT1 invitro[J].China Food Journal,2017,17(1):12-19.
[28]蒋广震,张永静,张定东,等.硅酸盐矿物体外吸附剂对饲料铅的吸附效果及其对福瑞鲤生长的影响[J].南京农业大学学报,2016,39(6):996-1002.Jiang G Z,Zhang Y J,Zhang D D,et al.Silicate adsorbent on absorption of Pb2+and effects of dietary supplement of silicate adsorbent on FFRC strain common carp[J].Journal of Nanjing Agricultural University,2016,39(6):996-1002.
[29]徐瑞生.人体胃液中盐酸功过的探讨[J].化学与生活,1995(11):26.Xu R S.Discussion on the merits of hydrochloric acid in human gastric juice[J].Education in Chemistry,1995(11):26.
[30]李海云,王秀丽.荔枝壳水不溶性膳食纤维吸附NO-2、胆酸钠的研究[J].食品研究与开发,2006,27(8):167-169.Li H Y,Wang X L.Study on the adsorptive ability for nitrite by the water-insoluble dietary fibre from igchee shell[J].Food Research and Development,2006,27(8):167-169.