Using corn cob as biomass material and ZnCl2/KCl molten salt as medium,the activated carbon(AC) was prepared through molten salt pyrolysis.The structure and morphology of the AC obtained at different pyrolysis temperatures were characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD) and N2 adsorption-desorption.The absorption performance of the biochar for Pb(Ⅱ) at different solution temperatures was investigated.The results showed that the AC exhibited a multi-pore structure,and the AC obtained at 650℃ had the largest specific surface area of 605.2m2/g.The absorption capacity and removal rate for Pb(Ⅱ) by the activated carbon increased with the increase of solution temperature.The removal rate of Pb(Ⅱ) reached to 98.72% under 323K and the initial concentration of 5mg/L.The absorption process was more suitable to be described by Freundlich isothermal model,and the absorption was non-uniform.An idea to utilization of biomass waste into environmental protection was provided.
Xiao Zuoan, Li Yuqi, Chen Pengfei, Cai Shuang, Zhan Dan
. Preparation of activated carbon by cracking corn cob in molten salt and its absorption performance for Pb(Ⅱ)[J]. New Chemical Materials, 2021
, 49(10)
: 170
-174
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.10.036
[1] 康小虎,白志山,王炳捷,等.APTES改性羧甲基壳聚糖微球对铅离子吸附性能及机理研究[J].功能材料,2019,50(8):8161-8169.
[2] Long J,Yuvaraja G,Zhou S,et al.Inactive fusarium fungal strains (ZSY and MJY) isolation and application for the removal of Pb(Ⅱ) ions from aqueous environment[J].Journal of Industrial & Engineering Chemistry,2019,72:442-452.
[3] Babaeian E,Homaee M,Rahnemaie R.Chelate-enhanced phytoextraction and phytostabilization of lead-contaminated soils by carrot (Daucus carota)[J].Archives of Agronomy and Soil Science,2015,62(3):339-358.
[4] Cai G,Zhao G,Wang X,et al.Synthesis of polyacrylic acid stabilized amorphous calcium carbonate nanoparticles and their application for removal of toxic heavy metal ions in water[J].Journal of Physical Chemistry C,2010,114(30):12948-12954.
[5] Gunashekar S,Abu-Zahra N.Structure-performance relationship of bulk functionalized polyurethane foams designed for lead ion removal from water[J].Journal of Porous Materials,2016,23(3):801-810.
[6] Li L,Dong J,Nenoff T.Transport of water and alkali metal ions through MFI zeolite membranes during reverse osmosis[J].Separation & Purification Technology,2007,53(1):42-48.
[7] Canet L,Ilpide M,Seta P.Efficient facilitated transport of lead,cadmium,zinc,and silver across a flat-sheet-supported liquid membrane mediated by lasalocid A[J].Separation Science & Technology,2002,37(8):1851-1860.
[8] 周鸣,董铁有,程明涛,等.电化学方法去除模拟血液中铅的研究[J].化学研究与应用,2013,25(5):723-726.
[9] Ying X,Fang Z.Experimental research on heavy metal wastewater treatment with dipropyl dithiophosphate[J].Journal of Hazardous Materials,2006,137(3):1636-1642.
[10] 张再利,况群,贾晓珊.花生壳吸附Pb2+、Cu2+、Cr3+、Cd2+、Ni2+的动力学和热力学研究[J].生态环境学报,2010,19(12):2973-2977.
[11] 龚香宜,熊武芳,连婉,等.稻壳生物炭对水中萘的吸附特性研究[J].应用化工,2020,49(9):2154-2158.
[12] 徐建玲,张頔,聂苗青,等.PEI功能化秸秆生物炭对水中Cr6+的吸附性能[J].高等学校化学学报,2020,41(1):155-161.
[13] 郭云海,李军,金央,等.玉米芯活性炭的制备及性能研究[J].无机盐工业,2017,49(7):46-49.
[14] 糜志远,肖瑞,张佳,等.玉米芯活性炭吸附重金属离子的研究[J].化学试剂,2020,42(7):780-785.
[15] Tang D,Luo Y,Lei W,et al.Hierarchical porous carbon materials derived from waste lentinus edodes by a hybrid hydrothermal and molten salt process for supercapacitor applications[J].Applied Surface Science,2018,462:862-871.
[16] 王子然.芦苇基活性炭的制备及其对重金属吸附的研究[D].保定:河北大学,2020.
[17] Jiang Q,Zhang Z,Yin S,et al.Biomass carbon micro/nano-structures derived from ramie fibers and corncobs as anode materials for lithium-ion and sodium-ion batteries[J].Applied Surface Science,2016(73-82):379-385.
[18] Zhan D,Luo W,Kraatz H B,et al.Facile approach for synthesizing high-performance MnO/C electrodes from rice husk[J].ACS Omega,2019,4(20):18908-18917.
[19] Xiao Z,Chen W,Liu K,et al.Porous biomass carbon derived from peanut shells as electrode materials with enhanced electrochemical performance for supercapacitors[J].International Journal of Electrochemical Science,2018,13(4):5370-5381.
[20] Thommes M,Kaneko K,Neimark A,et al.Physisorption of gases,with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)[J].Pure and Applied Chemistry,2015,87(9-10):1051-1069.
[21] Wang C,Huang J,Li J,et al.Revealing the effect of nanopores in biomass-derived carbon on its sodium-ion storage behavior[J].Chem Electro Chem,2020,7(1):201-211.
[22] He Jingsong,Chen J Paul.A comprehensive review on biosorption of heavy metals by algal biomass:materials,performances,chemistry,and modeling simulation tools[J].Bioresource Technology,2014,160:67-78.
[23] 陈再明,万还,徐义亮,等.水稻秸秆生物碳对重金属Pb2+的吸附作用及影响因素[J].环境科学学报,2012,32(4):769-776.
[24] Chen C,Qiu M.High efficiency removal of Pb(Ⅱ) in aqueous solution by a biochar-supported nanoscale ferrous sulfide composit[J].RSC Advances,2021,11(2):953-959.
