废毛发生物炭的特性及其对Ni(Ⅱ)和Zn(Ⅱ)的吸附研究

谢伟雪; 刘孝敏; 李小东; 焦永霞; 赵由才

doi:10.3969/j.issn.1674-991X.2018.06.087

废毛发生物炭的特性及其对Ni(Ⅱ)和Zn(Ⅱ)的吸附研究

doi: 10.3969/j.issn.1674-991X.2018.06.087

1.
兰州资源环境职业技术学院,甘肃兰州 730021
2.
甘肃自然能源研究所,甘肃兰州 730046
3.
同济大学,污染控制与资源化研究国家重点实验室,上海 200092

详细信息

作者简介:
作者简介:谢伟雪(1982—),女,副教授,研究方向为环境污染与固体废物资源化, xieweixue1982@126.com

中图分类号: X53;
计量
- 文章访问数: 569
- HTML全文浏览量: 117
- PDF下载量: 298
- 被引次数: 0
出版历程
- 收稿日期: 2018-05-21
- 刊出日期: 2018-11-20

Characteristics of waste hair biochar and its adsorption to Ni(Ⅱ) and Zn(Ⅱ)

1.
Lanzhou Resources and Environment Voc-Tech College, Lanzhou 730021, China
2.
Gansu Nature Energy Research Institute, Lanzhou 730046, China
3.
The State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China

摘要

摘要: 对利用废毛发制备得到的生物炭进行元素组成、扫描电子显微镜(SEM电镜)等特性的分析,考察其对水中重金属的吸附作用。采用Lagergren模型对Ni(Ⅱ)和Zn(Ⅱ)吸附动力学过程进行拟合,采用Langmuir和Freundlich模型对Ni(Ⅱ)和Zn(Ⅱ)的吸附等温过程进行拟合,以研究生物炭对水中重金属Ni(Ⅱ)和Zn(Ⅱ)的吸附特征。结果表明:生物炭含碳量较高,pH呈碱性,表面结构呈多孔性,具有较强的吸附能力;碳化温度为300、350 ℃时制备的生物炭,对Ni(Ⅱ)的实际最大平衡吸附量分别为5.48、6.25 mg/g,对Zn(Ⅱ)的实际最大平衡吸附量分别为3.02、3.78 mg/g;生物炭的吸附以化学吸附为主,碳化温度越高,吸附速率越快,Lagergren模型能较好地描述生物炭对Ni(Ⅱ)和Zn(Ⅱ)的吸附过程;Langmuir和Freundlich模型拟合曲线能较好地描述生物炭对Ni(Ⅱ)和Zn(Ⅱ)的等温吸附,吸附温度升高,生物炭吸附量增加,在温度为20、30和40 ℃时,对Ni(Ⅱ)的最大吸附量分别为5.59、7.16和7.23 mg/g,对Zn(Ⅱ)的最大吸附量分别为1.28、1.29和1.32 mg/g。
- 废毛发 /
- 生物炭 /
- 特性 /
- Ni(Ⅱ); /
- Zn(Ⅱ); /
- 吸附
Abstract: The properties of biochar prepared from waste hair were analyzed by element composition and SEM, and the adsorption ability to heavy metals from domestic wastewater observed.The adsorption kinetics processes of Ni(Ⅱ) and Zn(Ⅱ)were fitted by Lagergren model, and the adsorption isotherm of Ni(Ⅱ) and Zn(Ⅱ) fitted by Langmuir and Freundlich models to investigate the adsorption characteristics of biochar on heavy metals Ni(Ⅱ) and Zn(Ⅱ) in water. The results showed that the carbon content of biochar was high, being alkaline, and the surface structure had porosity with strong adsorption ability. At carbonization temperatures of 300 and 350 °C, the actual maximum equilibrium adsorption for Ni(Ⅱ) was 5.48 and 6.25 mg/g, and the actual maximum equilibrium adsorption for Zn(Ⅱ) was 3.02 and 3.78 mg/g, respectively. The Lagergren model can well describe the adsorption process of Ni(Ⅱ) and Zn(Ⅱ), mainly with chemical adsorption; and the higher the carbonization temperature, the faster the adsorption rate. Langmuir and Freundlich model fitting curves can better describe the isothermal adsorption of Ni(Ⅱ) and Zn(Ⅱ); and the higher the adsorption temperature, the more the adsorption capacity. At the temperature of 20,30 and 40 ℃, the saturated adsorbents of Ni(Ⅱ) were 5.59,7.16 and 7.23 mg/g, and the saturated adsorbents of Zn(Ⅱ) were 1.28,1.29 and 1.32 mg/g, respectively.
- waste hair /
- biochar /
- features /
- Ni(Ⅱ); /
- Zn(Ⅱ); /
- adsorption

HTML全文

参考文献(16)

[1]	张继义,蒲丽君,李根.秸秆生物碳质吸附剂的制备及其吸附性能[J].农业工程学报,2011,27(增刊2):104-109. ZHANG J Y,PU L J,LI G.Preparation of biochar adsorbent from straw and its adsorption capability[J].Transactions of the CSAE,2011,27(Suppl 2):104-109.
[2]	安增莉,侯艳伟,蔡超,等.水稻秸秆生物炭Pb(Ⅱ)的吸附特性[J].环境化学,2011,30(11):1851-1857. AN Z L,HOU Y W,CAI C,et al.Lead(Ⅱ)adsorption characteristics on different biochars derived from rice straw[J].Environmental Chemistry,2011,30(11):1851-1857.
[3]	郭素华,许中坚,李方文,等.生物炭对水中Pb(Ⅱ)和Zn(Ⅱ)的吸附特征[J].环境工程学报,2015,9(7):3215-3221. GUO S H,XU Z J,LI F W,et al.Adsorption of Pb(Ⅱ),Zn(Ⅱ)from aqueous solution by biochars[J].Chinese Journal of Environmental Engineering,2015,9(7):3215-3221.
[4]	楚颖超,李建宏,吴蔚东.椰纤维生物炭对Cd(Ⅱ)、As(Ⅲ)、Cr(Ⅲ)和Cr(Ⅳ)的吸附[J].环境工程学报,2015,9(5):2166-2170. CHU Y C,LI J H,WU W D.Adsorption of Cd(Ⅱ),As(Ⅲ),Cr(Ⅲ)and Cr(Ⅳ)by coconut fiber-derived biochars[J].Chinese Journal of Environmental Engineering,2015,9(5):2166-2170.
[5]	KONG J J,YUE Q Y,et al.Preparation,characterization and evaluation of adsorptive properties of leather waste based activated carbon via physical and chemical activation[J].Chemical Engineering Journal,2013,221:62-71.
[6]	WANG Q,CAO Q,WANG X,et al.A high-capacity carbon prepared from renewable chicken feather biopolymer for super capacitors[J].Journal of Power Sources,2013,225:101-107.
[7]	谢伟雪,刘孝敏,赵由才,等.废毛发角蛋白基的热解炭化及热动力学分析研究[J].环境科技,2017,30(3):13-16. XIE W X,LIU X M,ZHAO Y C,et al.Study on pyrolytic carbonization and thermodynamic analysis of waste hair keratin[J].Environmental Science and Technology,2017,30(3):13-16.
[8]	谢伟雪,胡敏哲,刘孝敏,等.角蛋白基生物炭对废水中重金属Ni(Ⅱ)的吸附性能研究[J].四川环境,2017,30(6):23-27. XIE W X,HU M Z,LIU X M,et al.Studies on the adsorption properties of keratin biochar on heavy metal Ni(Ⅱ)in sewage water[J].Sichuan Environment,2017,30(6):23-27.
[9]	GONZALEZ M E,CEA M.Evaluation of biodegradable polymers as encapsulating agents for the development of a urea controlled-release fertilizer using biochar as support material[J].Science of the Total Environment,2015,505:446-453.
[10]	REIS G S D, WILHELM M, SILVA T C D A,et al.The use of design of experiments for the evaluation of the production of surface rich activated carbon from sewage sludge via microwave and conventional pyrolysis[J].Applied Thermal Engineering,2016,93(19):590-597.
[11]	HO Y S,MC K G.Pseudo-second order model for sorption processes[J].Process Biochemistry,1999,34(5):451-465.
[12]	LANGMUIR I.The constitution and fundamental properties of solids and liquids:Ⅱ.liquids[J].Journal of the American Chemical Society,1917,39(9):1848-1906.
[13]	陆海楠,胡学玉.不同裂解条件对生物炭稳定性的影响[J].环境科学与技术,2013,36(8):11-14. LU H N,HU X Y.Influence of pyrolysis conditions on stability of biochar[J].Environmental Science & Technology,2013,36(8):11-14.
[14]	陈静文,张迪.两类生物炭的元素组分分析及其热稳定性[J].环境化学,2014,33(3):417-422. CHEN J W,ZHANG D.Elemental composition and thermal stability of two different biochars[J].Environmental Chemistry,2014,33(3):417-422.
[15]	罗安然. 农村生活垃圾生物质残渣制炭与无机残渣填埋技术研究[D].上海:同济大学,2016. LUO A R.Preparation of carbon using biomass residue and landfill of inorganic residue from rural solid waste[D].Shanghai:Tongji University,2016.
[16]	宋成芳. 生物质催化热解炭化的试验研究与机理分析[D].杭州:浙江工业大学,2013. SONG C F.Experiments research and mechanism analysis of biomass carbonization by catalytic pvrolvsis[D].Hangzhou:Zhejiang University of Technology,2013.