摘要
以西藏青稞秸秆为原料,采用共沉淀法制备载铝生物炭(HBSBC-Al),采用SEM-EDS、BET、XRD和FTIR进行表征,探究其对水中氟的吸附性能。结果表明,热解温度500℃制备得到的HBSBC-Al,在溶液温度80℃、投加量10 g/L,pH=7时对氟具有最佳吸附容量(11.33 mg/L),较大程度地提升了改性生物炭的吸附,较未改性生物炭有较大提升(0.322 mg/L),比表面积达到104.82 m^(2)/g,铝以α-Al_(2)O_(3)形式被负载,吸附过程符合拟二级动力学模型和Langmuir模型,为单分子层的化学吸附,几乎不受共存离子影响,经历5次吸附-脱附后仍有67.70%的吸附能力。得到一种具有西藏特色的环境修复材料,可为西藏地区固废资源化利用与地热水氟污染治理提供科学依据。
Aluminum loaded biochar(HBSBC-Al)was prepared from Xizang highland barley straw by coprecipitation method,characterized by SEM-EDS,BET,XRD and FTIR,and explored its adsorption performance for fluoride in water.The results showed that HBSBC-Al prepared at a pyrolysis temperature of 500℃had the optimal adsorption capacity for fluorine(11.33 mg/L)at a solution temperature of 80℃,a dosage of 10 g/L,and a pH of 7,which greatly improved the adsorption of unmodified biochar compared to unmodified biochar(0.322 mg/L).The specific surface area reached 104.82 m^(2)/g.Aluminum was loaded in the form ofα-Al_(2)O_(3),and the adsorption process followed the pseudo second order kinetic model and Langmuir model.It was a single molecular layer chemical adsorption,almost unaffected by coexisting ions.After 5 adsorption desorption cycles,it still had 67.70%adsorption capacity.A kind of environmental remediation material with Xizang characteristics was prepared,which can provide scientific basis for the utilization of solid waste resources and the treatment of fluorine pollution in geothermal water in Xizang.
作者
黄瑞卿
格旦
李伟
熊健
吕学斌
杨崛园
谢鹏程
HUANG Ruiqing;GE Dan;LI Wei;XIONG Jian;L Xuebin;YANG Jueyuan;XIE Pengcheng(School of Ecology and Environment,Xizang University,Lhasa 850000,China;Tibet Zebang Environmental Engineering Consulting Co.,Ltd.,Rikaze 857000,China)
出处
《应用化工》
北大核心
2025年第1期110-115,共6页
Applied Chemical Industry
基金
西藏自治区自然科学基金(XZ202401ZR0035)
西藏大学—高水平人才培养计划(2022-GSP-S062)。
关键词
青稞秸秆
生物炭
铝改性
西藏地热水
氟
barley straw
biochar
aluminum modification
Tibetan geothermal water
fluorine
