污泥液化生物炭对亚甲基蓝的吸附特性及机理

潘紫倩; 黄华军; 何小武; 肖晓峰; 王佳欣; 李凯; 杨唐仪

PDF(838 KB)

中国环境科学 ›› 2020, Vol. 40 ›› Issue (1) : 217-226.

水污染与控制

污泥液化生物炭对亚甲基蓝的吸附特性及机理

潘紫倩¹, 黄华军¹, 何小武¹, 肖晓峰¹, 王佳欣¹, 李凯², 杨唐仪³

作者信息 +

Characteristic and mechanism of methylene blue adsorption by biochar from the liquefaction of sewage sludge

PAN Zi-qian¹, HUANG Hua-jun¹, HE Xiao-wu¹, XIAO Xiao-feng¹, WANG Jia-xin¹, LI Kai², YANG Tang-yi³

Author information +

文章历史 +

摘要

探讨污泥在乙醇-水混合溶剂中液化产生的生物炭的吸附潜力及其吸附机理（以亚甲基蓝（MB）废水为处理对象），结果表明：生物炭的吸附容量随着MB溶液起始pH值升高而升高，当pH超过8时，MB的碱性褪色开始显现.吸附温度的上升（30~60℃）对生物炭吸附容量的影响不明显.吸附容量总体上随着吸附时间的增加而上升（240min前），在240min后趋于稳定.吸附剂用量及初始MB浓度过高或过低都不利于生物炭的吸附，存在一个的临界点，分别是6mg和120mg/L.生物炭吸附MB的过程吻合准二级动力学方程（R²=0.9994）和Langmuir方程（R²=0.9831），且为自发吸热的过程，受物理吸附和化学吸附联合控制，具体的机理包括：离子交换、官能团络合、π-π吸附等.

Abstract

The purpose of this study was to investigate the adsorption potential/mechanism of biochar obtained from the liquefaction of sewage sludge in ethanol-water co-solvent, which could provide data support and theoretical reference for its application as adsorbent. Methylene blue wastewater was selected as the treatment object. The results showed that the adsorption capacity of biochar firstly increased with the increase of initial pH of MB solution. When the pH of MB solution was higher than 8, the alkaline fading of MB began to appear. The increase of adsorption temperature (30~60℃) had no obvious effects on the adsorption capacity of biochar. The adsorption capacity of biochar overall increased with the increase of adsorption time before 240min. When the adsorption time exceeded 240 min, the adsorption capacity tended to be stable. Too high or too low adsorbent dosage and initial MB concentration were both not beneficial for the adsorption process. Both of them had an optimal critical value of 6mg and 120mg/L, respectively. The adsorption process of MB by biochar matched perfectly with the pseudo-second-order model (R²=0.9994) and the Langmuir model (R²=0.9831), respectively. The adsorption process was spontaneous and endothermic, controlled by both physical and chemical adsorption. The specific adsorption mechanisms include ion exchange, functional group complexation, π-π adsorption, and so on.

导出引用

潘紫倩, 黄华军, 何小武, 肖晓峰, 王佳欣, 李凯, 杨唐仪. 污泥液化生物炭对亚甲基蓝的吸附特性及机理[J]. 中国环境科学. 2020, 40(1): 217-226

PAN Zi-qian, HUANG Hua-jun, HE Xiao-wu, XIAO Xiao-feng, WANG Jia-xin, LI Kai, YANG Tang-yi. Characteristic and mechanism of methylene blue adsorption by biochar from the liquefaction of sewage sludge[J]. China Environmental Science. 2020, 40(1): 217-226

中图分类号： X703

参考文献

[1] Huang H J, Yuan X Z. Recent progress in the direct liquefaction of typical biomass[J]. Progress in Energy and Combustion Science, 2015,49:59-80.
[2] Qian L L, Wang S Z, Savage P E. Hydrothermal liquefaction of sewage sludge under isothermal and fast conditions[J]. Bioresource Technology, 2017,232:27-34.
[3] Hu X, Gunawan R, Mourant D, et al. Upgrading of bio-oil via acid-catalyzed reactions in alcohols-A mini review[J]. Fuel Processing Technology, 2017,155:2-19.
[4] Xiu S N, Shahbazi A. Bio-oil production and upgrading research:A review[J]. Renewable and Sustainable Energy Reviews, 2012, 16(7):4406-4414.
[5] Leng L J, Yuan X Z, Huang H J, et al. Bio-char derived from sewage sludge by liquefaction:Characterization and application for dye adsorption[J]. Applied Surface Science, 2015,346:223-231.
[6] Leng L J, Yuan X Z, Huang H J, et al. Characterization and application of bio-chars from liquefaction of microalgae, lignocellulosic biomass and sewage sludge[J]. Fuel Processing Technology, 2015,129:8-14.
[7] Ma W C, Du G Y, Li J, et al. Supercritical water pyrolysis of sewage sludge[J]. Waste Management, 2017,59:371-378.
[8] Wang Y, Chen G Y, Li Y B, et al. Experimental study of the bio-oil production from sewage sludge by supercritical conversion process[J]. Waste Management, 2013,33(11):2408-2415.
[9] Vardon D R, Sharma B K, Scott J, et al. Chemical properties of biocrude oil from the hydrothermal liquefaction of Spirulina algae, swine manure, and digested anaerobic sludge[J]. Bioresource Technology, 2011,102(17):8295-8303.
[10] Malins K, Kampars V, Brinks J, et al. Bio-oil from thermo-chemical hydro-liquefaction of wet sewage sludge[J]. Bioresource Technology, 2015,187:23-29.
[11] Huang H J, Yuan X Z, Li B T, et al. Thermochemical liquefaction characteristics of sewage sludge in different organic solvents[J]. Journal of Analytical and Applied Pyrolysis, 2014,109:176-184.
[12] Li H, Yuan X Z, Zeng G M, et al. The formation of bio-oil from sludge by deoxy-liquefaction in supercritical ethanol[J]. Bioresource Technology, 2010,101(8):2860-2866.
[13] Leng L J, Yuan X Z, Shao J G, et al. Study on demetalization of sewage sludge by sequential extraction before liquefaction for the production of cleaner bio-oil and bio-char[J]. Bioresource Technology, 2016,200:320-327.
[14] Huang H J, Yuan X Z, Zhu H N, et al. Comparative studies of thermochemical liquefaction characteristics of microalgae, lignocellulosic biomass and sewage sludge[J]. Energy, 2013,56:52-60.
[15] Kang S M, Li X L, Fan J, et al. Hydrothermal conversion of lignin:A review[J]. Renewable and Sustainable Energy Reviews, 2013,27:546-558.
[16] Li R D, Ma Z M, Yang T H, et al. Sub-supercritical liquefaction of municipal wet sewage sludge to produce bio-oil:Effect of different organic-water mixed solvents[J]. The Journal of Supercritical Fluids, 2018,138:115-123.
[17] Prajitno H, Zeb H, Park J, et al. Efficient renewable fuel production from sewage sludge using a supercritical fluid route[J]. Fuel, 2017, 200:146-152.
[18] Prajitno H, Park J, Ryu C, et al. Effects of solvent participation and controlled product separation on biomass liquefaction:A case study of sewage sludge[J]. Applied Energy, 2018,218:402-416.
[19] Wang W J, Yu Q, Meng H, et al. Catalytic liquefaction of municipal sewage sludge over transition metal catalysts in ethanol-water co-solvent[J]. Bioresource Technology, 2018,249:361-367.
[20] Lai F Y, Chang Y C, Huang H J, et al. Liquefaction of sewage sludge in ethanol-water mixed solvents for bio-oil and biochar products[J]. Energy, 2018,148:629-641.
[21] Boehm H P. Surface oxides on carbon and their analysis:a critical assessment[J]. Carbon, 2002,40(2):145-149.
[22] Boehm H P. Some aspects of the surface chemistry of carbon blacks and other carbons[J]. Carbon, 1994,32(5):759-769.
[23] Leng L J, Yuan X Z, Zeng G M, et al. Surface characterization of rice husk bio-char produced by liquefaction and application for cationic dye (Malachite green) adsorption[J]. Fuel, 2015,155:77-85.
[24] Altenor S, Carene B, Emmanuel E, et al. Adsorption studies of methylene blue and phenol onto vetiver roots activated carbon prepared by chemical activation[J]. Journal of Hazardous Materials, 2009,165(1-3):1029-1039.
[25] Liu S, Li J H, Xu S, et al. A modified method for enhancing adsorption capability of banana pseudostem biochar towards methylene blue at low temperature[J]. Bioresource Technology, 2019, 282:48-55.
[26] Wang H, Yuan X Z, Zeng G M, et al. Removal of malachite green dye from wastewater by different organic acid-modified natural adsorbent:kinetics, equilibriums, mechanisms, practical application, and disposal of dye-loaded adsorbent[J]. Environmental Science and Pollution Research, 2014,21(19):11552-11564.
[27] 周勇.改性玉米秸秆吸附水液中溶橙黄Ⅱ染料及其过程参数优化[D]. 成都:西南石油大学, 2016. Zhou Y. Removal of Orange II from aqueous solution using modified cornstalk and process parameters optimization[D]. Chengdu:Southwest Petroleum University, 2016.
[28] Salima A, Benaouda B, Noureddine B, et al. Application of Ulva lactuca and Systoceira stricta algae-based activated carbons to hazardous cationic dyes removal from industrial effluents[J]. Water Research, 2013,47(10):3375-3388.
[29] Tran H N, You S J, Hosseini-Bandegharaei A, et al. Mistakes and inconsistencies regarding adsorption of contaminants from aqueous solutions:A critical review[J]. Water Research, 2017,120:88-116.
[30] Salleh M A M, Mahmoud D K, Karim W A W A, et al. Cationic and anionic dye adsorption by agricultural solid wastes:A comprehensive review[J]. Desalination, 2011,280(1-3):1-13.
[31] 季雪琴,吕黎,陈芬,等.秸秆生物炭对有机染料的吸附作用及机制[J]. 环境科学学报, 2016,36(5):1648-1654. Ji X Q, Lü L, Chen F, et al. Sorption properties and mechanisms of organic dyes by straw biochar[J]. Acta Scientiae Circumstantiae, 2016, 36(5):1648-1654.
[32] Saha P, Chowdhury S, Gupta S, et al. Insight into adsorption equilibrium, kinetics and thermodynamics of Malachite Green onto clayey soil of Indian origin[J]. Chemical Engineering Journal, 2010, 165(3):874-882.
[33] 常春,刘天琪,王瑀婷,等.水热法制备玉米叶基生物炭对亚甲基蓝的吸附性能研究[J]. 环境科学学报, 2017,37(7):2680-2690. Chang C, Liu T Q, Wang Y T, et al. Hydrothermal preparation of maize leaf based biochar and its adsorption performance for methylene blue[J]. Acta Scientiae Circumstantiae, 2017,37(7):2680-2690.
[34] 郭俊元,甘鹏飞,陈诚,等.磁性壳聚糖的制备及处理亚甲基蓝废水[J]. 中国环境科学, 2019,39(6):2422-2430. Guo J Y, Gan P F, Chen C, et al. Preparation of magnetic chitosan and its application in the treatment of methylene blue wastewater[J]. China Environmental Science, 2019,39(6):2422-2430.
[35] Liu Z G, Zhang F S. Removal of lead from water using biochars prepared from hydrothermal liquefaction of biomass[J]. Journal of Hazardous Materials, 2009,167(1-3):933-939.
[36] Bulut E, özacar M, ?engil ? A. Adsorption of malachite green onto bentonite:Equilibrium and kinetic studies and process design[J]. Microporous and Mesoporous Materials, 2008,115(3):234-246.
[37] 李杰.生物炭复合金属氧化物的制备及其去除水中重金属的机制研究[D]. 青岛:青岛科技大学, 2018. Li J. The prepatation of biochar combined by metal oxide and its mechanism for removal heavy metal ions from aqueous solution[D]. Qingdao:Qingdao University of Science & Technology, 2018.
[38] Arellano-Cárdenas S, López-Cortez S, Cornejo-Mazón M, et al. Study of malachite green adsorption by organically modified clay using a batch method[J]. Applied Surface Science, 2013,280:74-78.
[39] Akar E, Altini?ik A, Seki Y. Using of activated carbon produced from spent tea leaves for the removal of malachite green from aqueous solution[J]. Ecological Engineering, 2013,52:19-27.
[40] 王倩,杜晓丽,崔申申,等.给水厂污泥颗粒制备及对铜离子的吸附行为[J]. 中国环境科学, 2019,39(4):1672-1677. Wang Q, Du X L, Cui S S, et al. Preparation of granular sludge from water supply plants and its adsorption behavior of copper ions[J]. China Environmental Science, 2019,39(4):1672-1677.
[41] Lu H L, Zhang W H, Yang Y X, et al. Relative distribution of Pb²⁺ sorption mechanisms by sludge-derived biochar[J]. Water Research, 2012,46(3):854-862.
[42] Song X H, Gunawan P, Jiang R R, et al. Surface activated carbon nanospheres for fast adsorption of silver ions from aqueous solutions[J]. Journal of Hazardous Materials, 2011,194:162-168.
[43] Lua A C, Yang T. Effect of activation temperature on the textural and chemical properties of potassium hydroxide activated carbon prepared from pistachio-nut shell[J]. Journal of Colloid and Interface Science, 2004,274(2):594-601.
[44] Wu Z B, Zhong H, Yuan X Z, et al. Adsorptive removal of methylene blue by rhamnolipid-functionalized graphene oxide from wastewater[J]. Water Research, 2014,67:330-344.
[45] 何佳闻,何春霞,郭航言,等.5种秸秆生物炭吸附亚甲基蓝及其性能对比研究[J]. 南京农业大学学报, 2019,42(2):382-388. He J W, He C X, Guo H Y, et al. Adsorption of methylene blue by five straw biochars and its performance comparison[J]. Journal of Nanjing Agricultural University, 2019,42(2):382-388.