High-rate removal of As(Ⅲ) from aqueous system with sulfhydryl magnetic biological bamboo charcoal nanocomposites prepared by chemical co-precipitation method  

多巯基磁性生物竹炭纳米复合材料的化学共沉积制备及其高效去除水溶液中的As(Ⅲ)

作　　者：Yi-wei LUO Si WAN Jiang-jun XIAO Dai-she WU 罗轶维;万斯;肖疆俊;吴代赦(南昌大学资源环境与化工学院,南昌330031;中南林业科技大学环境科学与工程学院,长沙410004;昆明理工大学环境科学与工程学院,昆明650500;湖南有色金属研究院有限责任公司,长沙410007;湖南省环境保护科学研究院,长沙410014)

机构地区：[1]College of Resources Environment and Chemical Engineering,Nanchang University,Nanchang 330031,China [2]College of Environmental Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China [3]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China [4]Hunan Research Institute for Nonferrous Metals Co.,Ltd.,Changsha 410007,China [5]Hunan Research Academy of Environmental Sciences,Changsha 410014,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第8期2757-2769,共13页中国有色金属学报（英文版）

基　　金：financial support from the Key Research and Development Program of Hunan Province,China (No.2021GK4059)。

摘　　要：Sulfhydryl magnetic biological bamboo charcoal nanocomposite(BBC@nFe-SH)was prepared by chemical co-precipitation method for the robust capture of As(Ⅲ)from aqueous solutions.The novel BBC@nFe-SH shows favorable magnetic field strength(83376 A/m),which enables BBC@nFe-SH to be quickly recovered from aqueous solution.The maximum As(Ⅲ)adsorption capacity is as high as 98.63 mg/g at pH 5.0 and 40°C,reaching reaction equilibrium within 120 min.Various characterizations(e.g.,SEM,FTIR,VSM and XPS)suggest that As(Ⅲ)prefers to coordinate with surface oxygen groups bonded to the surface.BBC@nFe-SH displayed high stability and recyclability throughout the removal process,which could be easily activated by 1 mol/L NaOH after usage.Thus,the novel BBC@nFe-SH has promising applications for As(Ⅲ)treatment.通过简单的化学共沉淀方法制备多基团磁性生物竹炭纳米复合材料(BBC@n Fe-SH)并用于废水中As(Ⅲ)的去除。研究表明,BBC@nFe-SH的磁场强度达到83376 A/m,具有极好的磁回收性。在pH 5.0、40℃的条件下BBC@n Fe-SH对As(Ⅲ)的最大吸附容量为98.63 mg/g,且在120 min内达到反应平衡。SEM、FTIR、VSM和XPS等分析表明,As(Ⅲ)的去除机制为BBC@nFe-SH表面的含氧基团与As(Ⅲ)的络合作用。在水处理过程中BBC@n Fe-SH表现出较好的稳定性和可回收性,可以通过1mol/LNa OH淋洗实现材料的再生活化。因此,BBC@n Fe-SH在含砷废水处理方面具有极大的应用潜力。

关 键 词：arsenic-containing wastewater bamboo biochar chemical co-precipitation adsorption RECYCLABILITY wastewater treatment 

分 类 号：TB332[一般工业技术—材料科学与工程] X703[环境科学与工程—环境工程]