摘要
针对全氟烷基醚磺酸盐(F-53B)、全氟壬烯氧基苯磺酸钠(OBS)和全氟辛烷磺酸(PFOS)等3种全氟和多氟化合物,采用高效液相色谱-质谱联用仪(UPLC-MS/MS)检测含量,探究椰壳活性炭对这3种物质的协同去除性能。结果表明,椰壳活性炭可同时实现对F-53B、OBS和PFOS的协同高效去除,其吸附行为遵循Langmuir吸附等温线模型,最大平衡吸附量分别为1.74、1.71、1.63 mg/g;通过对溶液温度、反应转速及椰壳活性炭投加量等影响因素的研究发现,转速和椰壳活性炭投加量对1 mg/L的F-53B、OBS和PFOS混合液去除表现出极显著性差异(P<0.001),其中,150 r/min转速条件下对F-53B和PFOS的去除率高出静置(0 r/min)状态下15%~34%,且PFOS>F-53B>OBS;3种物质去除率与活性炭含量呈正相关,5 g/L椰壳活性炭对F-53B、OBS和PFOS的吸附平衡时间分别为8、4和11 h,较1 g/L实验组要提前16、20、13 h,且去除率分别为99.3%、99.3%、99.9%。此外,经乙酸改性后的椰壳活性炭对3种物质最终去除率均达99.8%以上,显示出更优越的吸附能力。
The contents of chlorinated perfluoroalkyl ether sulfonate(F-53B),perfluoro-nonenoxy benzene sulfonate(OBS)and perfluorooctane sulfonate(PFOS)were determined by high performance liquid chromatography-mass spectrometry(UPLC-MS/MS),to explore the synergistic removal performance of coconut shell activated carbon on these three substances.The results showed coconut shell activated carbon can simultaneously achieve synergistic and efficient removal of F-53B,OBS and PFOS.The adsorption of F-53B,OBS and PFOS on coconut shell activated carbon followed Langmuir adsorption isotherm model,and the maximum equilibrium adsorption capacity was 1.74,1.71 and 1.63 mg/g,respectively.Through the study of the influence factors such as solution temperature,rotating speed and coconut shell activated carbon dosage,it was found that the removal of the mixture of F-53B,OBS and PFOS at 1 mg/L by rotating speed and coconut shell activated carbon dosage was significantly different(P<0.001).The removal rate of F-53B and PFOS at 150 r/min was 15%~34%higher than that at 0 rpm,and PFOS>F-53B>OBS.The removal rate of the three substances was positively correlated with the content of activated carbon.The adsorption equilibrium time on 5 g/L coconut shell activated carbon was 8 h and the removal rate was 99.3%for F-53B,4 h and the removal rate was 99.3%for OBS and 11 h and the removal rate was 99.9%for PFOS,16 h,20 h and 13 h earlier than that of 1 g/L experimental group.In addition,the coconut shell activated carbon modified by acetic acid had a higher final removal rate of more than 99.8%,showing a better adsorption capacity.
作者
周佳钰
吴少林
吴永明
邓觅
朱林
梁培瑜
吴施婧
ZHOU Jiayu;WU Shaolin;WU Yongming;DENG Mi;ZHU Lin;LIANG Peiyu;WU Shijing(College of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China;Institute of Microbiology,Jiangxi Academy of Sciences,Nanchang 330096,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2022年第2期106-111,共6页
Environmental Science & Technology
基金
国家自然科学基金(31860154)
江西省重点研发计划项目(20202BBGL73082)
江西省科学院项目(2018-YYB-21,2018-XTPH1-21,2020-YZD-25)。
关键词
椰壳活性炭
全氟烷基醚磺酸盐
全氟壬烯氧基苯磺酸钠
全氟辛烷磺酸
协同去除
coconut shell activated carbon
chlorinated polyfluoroalkyl ether sulfonic acid
perfluorononenyloxy benzene sulfonate
perfluorooctane sulfonate
synergistic removal
作者简介
周佳钰(1998-),女,硕士研究生,主要从事水污染治理研究,(电子信箱)2295268480@qq.com;通讯作者:邓觅,男,助理研究员,博士,(电子信箱)dengmi@jxas.ac.cn。
