摘要
选择牛骨炭、猪骨炭、鸡骨炭和活性氧化铝为材料,开展等温吸附实验、动态吸附实验、连续进水吸附柱和小试实验,以研究不同材料对氟的吸附能力,并采用扫描电子显微镜(SEM)、比表面积分析仪(BET)、傅里叶红外光谱仪(FTIR)等对吸附材料进行表征。结果表明,4种材料对氟的吸附动力学均符合准二级动力学模型,属于化学吸附;活性氧化铝、牛骨炭、猪骨炭和鸡骨炭对氟的最大吸附量分别为2.487、5.336、7.974和7.236 mg·g-1;骨炭对氟的吸附能力和亲和力都远大于活性氧化铝;活性氧化铝作吸附剂处理农村低浓度含氟地下水时,出水中氟浓度未达到GB 5749-2006《生活饮用水卫生标准》;骨炭处理低氟浓度地下水时,对氟的净化效果好,处理后的水质能达到饮用水的标准。
Human health will be endangered by long term drinking of water containing excessive fluorine. Cow bone biochar, pig bone biochar, chicken bone biochar and activated alumina were selected as materials to study their capacity to adsorb fluorine based on isothermal adsorption experiments, dynamic adsorption experiments, continuous water column and small-scale experiments. The adsorption materials were analyzed by scanning electron microscopy (SEM), specific surface area measurement(BET) and fourier transform infrared spectrometer (FTIR). Results show that the adsorption kinetics of fluorine by the four materials accorded with quasi-second-order kinetics model, which belonged to chemical adsorption. The maximum adsorption capacity of fluorine by activated alumina, cow bone biochar, pig bone biochar and chicken bone biochar were 2.487, 5.336, 7.974 and 7.236 mg·g^-1, respectively. The adsorption capacity and affinity for fluorine was greater for bone biochar than activated alumina. Treating low-concentration fluorine groundwater in rural areas with activated alumina does not reduce the fluorine concentration sufficiently to meet the drinking water standard. However, good fluorine adsorption is found when using bone biochar resulting in the quality of treated groundwater meeting the drinking water standard.
作者
曹俊敏
李鑫
徐德福
CAO Jun-min;LI Xin;XU De-fu(Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Nanjing 210044,China;Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing 210044,China;School of Environmental Science and Engineering,Nanjing University of Information Science & Technology,Nanjing 210044,China)
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2019年第8期1064-1070,共7页
Journal of Ecology and Rural Environment
基金
江苏省自然科学基金(BK20141477)
江苏高校“青蓝工程”(20161507)
江苏省“六大人才高峰”资金(R2016L06)
关键词
骨炭
活性氧化铝
氟
吸附
bone biochar
activated alumina
fluorine
adsorption
作者简介
曹俊敏(1990-),女,江苏常熟人,硕士生,主要从事污水生态修复研究。E-mail:Jmcao55@163.com;通信作者:徐德福,E-mail:defuxu1@163.com.
