核桃壳吸附废水氨氮的动力学和影响因素
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摘要
对核桃壳吸附废水中氨氮的动力学和影响因素进行了研究。考察了p H、时间、Na+、Cr3+和温度等因素对模拟废水中氨氮的吸附行为的影响。研究结果显示,核桃壳对氨氮的吸附最佳p H为8.5,通过对吸附过程动力学参数的计算,吸附过程符合二级动力学过程,Langmuir模型能较好地反映吸附过程特征。285、300和310 K条件下最大吸附量分别为0.45、0.58和0.6 g/kg。说明核桃壳是具有潜在利用价值的生物质吸附材料。
Walnuts shells were used to adsorb ammonia nitrogen in synthetic wastewater. The influencing factors and dynamics of ammonia nitrogen adsorption were studied. The effects of contact time,p H,Na+,Cr3 +and temperature on adsorption characteristics of ammonia nitrogen were also investigated. The results showed that the optimal p H was 8. 5. Through calculating the adsorption kinetics parameters,the adsorption process of ammonia nitrogen was in line with Lagergren model and in accord with second rate dynamics equation. When temperatures were 285 K,300 K,310 K,the maximum adsorption capacity could reach 0. 58,0. 6 and 0. 45 g / kg,respectively. These results showed that walnuts shell is a prospective bio-adsorbent.
Walnuts shells were used to adsorb ammonia nitrogen in synthetic wastewater. The influencing factors and dynamics of ammonia nitrogen adsorption were studied. The effects of contact time,p H,Na+,Cr3 +and temperature on adsorption characteristics of ammonia nitrogen were also investigated. The results showed that the optimal p H was 8. 5. Through calculating the adsorption kinetics parameters,the adsorption process of ammonia nitrogen was in line with Lagergren model and in accord with second rate dynamics equation. When temperatures were 285 K,300 K,310 K,the maximum adsorption capacity could reach 0. 58,0. 6 and 0. 45 g / kg,respectively. These results showed that walnuts shell is a prospective bio-adsorbent.
引文
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[14]俞汉青,郑煜铭,顾国维,等.活性污泥对四种非极性有机物的吸附.环境科学学报,2003,23(4):546-548Yu Hanqing,Zheng Yu ming,Gu Guowei,et al.Sorption of four non-poplar organic compounds by activated sludge.Acta Scientiae Circumstantiae,2003,23(4):546-548(in Chinese)
[15]Agarwal G.S.,Bhuptawat H.K.,Chaudhari S.Biosorption of aqueous chromium(VI)by Tamarindus indica seeds.Bioresource Technology,2006,97(7):949-956
[16]Nassar M.M.Intraparticle diffusion of basic red and basic yellow dyes on palm fruit bunch.Water Science and Technology,1999,40(7):133-139
[17]彭剑锋,宋永会,高红杰,等.三种填料对模拟河水中氮磷吸附性能对比.环境工程技术学报,2011,1(4):323-327Peng Jianfeng,Song Yonghui,Gao Hongjie,et al.Comparison of the adsorption properties of nitrogen and phosphorus by three stufs.Journal of Environmental Engineering Technology,2011,1(4):323-327(in Chinese)
[18]彭雪妍,肖瑜,李中秋.活性炭和沸石组合吸附渗滤液中COD和氨氮的实验研究.环境科学与管理,2012,37(8):86-89Peng Xueyan,Xiao Yu,Li Zhongqiu.Experimental research on COD and ammonia nitrogen adsorption by activated carbon and zeolite from landfill leachate.Environmental Science and Management,2012,37(8):86-89(in Chinese)
[2]卢莉娟,李端琴,马建.改性沸石净化微污染水中有机物的研究.安徽农业科学,2010,38(7):3704-3706Lu Lijuan,Li Duanqin,Ma Jian.Study on modified zeolite purification of organic matter in micro-polluted water.Journal of Anhui Agricultural Sciences,2010,38(7):3704-3706(in Chinese)
[3]徐鹏飞,陈朴青,简敏菲,等.不同人工湿地填料对氨氮的吸附特性分析.江西师范大学学报(自然科学版),2012,36(2):209-212Xu Pengfei,Chen Puqing,Jian Minfei,et al.The analysis for ammonia adsorption characteristics of different fillings in the constructed wetland.Journal of Jiangxi Normal University(Natural Science Edition),2012,36(2):209-212(in Chinese)
[4]胡春华,张培,曾思苗,等.鄱阳湖不同形态氮的时空分布特征.江西师范大学学报(自然科学版),2012,36(2):213-217Hu Chunhua,Zhang Pei,Zeng Simiao,et al.The temporal and spatial distribution characteristics of different species nitrogen in Poyang Lake.Journal of Jiangxi Normal University(Natural Science),2012,36(2):213-217(in Chinese)
[5]阳维薇,王中琪.改性玉米秸秆吸附处理含氨氮养猪废水.广东化工,2011,38(5):159-160Yang Weiwei,Wang Zhongqi.Treatment of swine wastewater containing NH3-N with modified corn stalk.Guangdong Chemical Industry,2011,38(5):159-160(in Chinese)
[6]陈学群,姚丹,孔了一.制革废水氨氮达标和脱氮处理技术分析.西部皮革,2008,30(4):27-31Chen Xuequn,Yao Dan,Kong Liaoyi.NH3-N reaching standard and nitrogen removal technology for tannery waste water.West Leather,2008,30(4):27-31(in Chinese)
[7]阮晓卿,吴浩汀.制革废水高浓度氨氮脱氮技术探讨.中国皮革,2008,37(19):46-47Ruan Xiaoqing,Wu Haoding.Nitrogen Removal of tannery waste water with high concentation ammonium.China Leather,2008,37(19):46-47(in Chinese)
[8]Sud D.,Mahajan G.,Kaur M.P.Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions:A review.Bioresource Technology,2008,99(14):6017-6027
[9]Wan Ngah W.S.,Hanafiah M.A.K.M.Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents:A review.Bioresource Technology,2008,99(10):3935-3948
[10]王焰新.去除废水中重金属的低成本吸附剂:生物质和地质材料的环境利用.地学前缘,2001,8(2):301-306Wang Yanxin.Removal of Heavy metals from wastewaters using low cost sorbents:Applications of biomass and geomaterial to environmental protection.Earth Science Frontiers,2001,8(2):301-306(in Chinese)
[11]王宇,高宝玉,岳文文,等.改性玉米秸秆对水溶液中硝酸根的吸附动力学研究.环境科学学报,2007,27(9):1458-1462Wang Yu,Gao Baoyu,Yue Wenwen,et al.Adsorption of nitrate from aqueous solution by modified corn residues.Acta Scientiae Circumstantiae,2007,27(9):1458-1462(in Chinese)
[12]丁绍兰,屈振宇,杨鹏.改性核桃壳吸附废水中氨氮的机理研究.环境科学与技术,2010,33(S2):277-281Ding Shaolan,Qu Zhenyu,Yang Peng.Study on the mechanism of NH4-N adsorption by modified walnuts shell.Environmental Science&Technology,2010,33(S2):277-281(in Chinese)
[13]李成涛,张敏,白清友,等.聚丁二酸丁二醇酯生物降解酶及其催化性能研究.环境科学与技术,2012,35(8):37-40Li Chengtao,Zhang min,Bai Qingyou,et al.Purification and characterization of poly(Butylenes Succinate)degrading enzyme.Environmental Science&Technology,2012,35(8):37-40(in Chinese)
[14]俞汉青,郑煜铭,顾国维,等.活性污泥对四种非极性有机物的吸附.环境科学学报,2003,23(4):546-548Yu Hanqing,Zheng Yu ming,Gu Guowei,et al.Sorption of four non-poplar organic compounds by activated sludge.Acta Scientiae Circumstantiae,2003,23(4):546-548(in Chinese)
[15]Agarwal G.S.,Bhuptawat H.K.,Chaudhari S.Biosorption of aqueous chromium(VI)by Tamarindus indica seeds.Bioresource Technology,2006,97(7):949-956
[16]Nassar M.M.Intraparticle diffusion of basic red and basic yellow dyes on palm fruit bunch.Water Science and Technology,1999,40(7):133-139
[17]彭剑锋,宋永会,高红杰,等.三种填料对模拟河水中氮磷吸附性能对比.环境工程技术学报,2011,1(4):323-327Peng Jianfeng,Song Yonghui,Gao Hongjie,et al.Comparison of the adsorption properties of nitrogen and phosphorus by three stufs.Journal of Environmental Engineering Technology,2011,1(4):323-327(in Chinese)
[18]彭雪妍,肖瑜,李中秋.活性炭和沸石组合吸附渗滤液中COD和氨氮的实验研究.环境科学与管理,2012,37(8):86-89Peng Xueyan,Xiao Yu,Li Zhongqiu.Experimental research on COD and ammonia nitrogen adsorption by activated carbon and zeolite from landfill leachate.Environmental Science and Management,2012,37(8):86-89(in Chinese)