Fe^(0)改性厌氧颗粒污泥吸附Sb(Ⅴ)效用及其机理  

Effect and mechanism of adsorption of Sb(Ⅴ)by Fe^(0) modified anaerobic granular sludge

作　　者：王西峰[1] 王雪琴 王宇飞 覃楚翰 严琼 邓仁健[1] WANG Xi-feng;WANG Xue-qin;WANG Yu-fei;QIN Chu-han;YAN Qiong;DENG Ren-jian(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《应用化工》2023年第6期1675-1681,1688,共8页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(41672350);湖南省自然科学基金项目(2023JJ60162)。

摘　　要：在UASB动态运行下,Fe^(0)改性颗粒污泥对锑的最高去除率可达99.5%,改性污泥各组分对Sb(Ⅴ)的去除率高于未改性污泥,改性污泥中锑的生物质结合位多于未改性颗粒污泥。除锑后的改性污泥表面出现了大量颗粒状物体;多糖与蛋白质在改性污泥吸附锑时的作用效果相当;改性污泥吸附Sb(Ⅴ)后,出现了FeSb_(2)O_(4)、FeOOH、Fe_(2)O_(3)、Fe_(3)O_(4),反映出Sb(V)与污泥中的铁离子络合形成铁锑共沉物;吸附锑后,改性污泥的Fe2p峰的结合能从711.044 eV与724.642 eV变为711.105 eV与724.703 eV,说明Fe^(0)改性颗粒污泥中的氢氧根被Sb取代,并与O-Fe结合,形成了Fe-O-Sb配位化合物,沉积于颗粒污泥表面,达到除锑效果。The efficiency of Sb(Ⅴ)removal of anaerobic granular sludge was studied.The results show that the highest removal rate of antimony by Fe^(0) modified granular sludge can reach 99.5%.According to the SEM scan drawing,a large number of granular objects appeared on the surface of the modified sludge after antimony removal;the effect of polysaccharides and proteins on the adsorption of antimony in modified sludge was comparable.FeSb_(2)O_(4),FeOOH,Fe_(2)O_(3) and Fe_(3)O_(4) diffraction peaks appeared after the modified sludge adsorbed Sb(V),reflecting that Sb(Ⅴ)complexed with iron ions in the sludge to form iron-antimony co-sediment.The binding energy of Fe2p peak of modified sludge after adsorption of antimony changed from 711.044 eV and 724.642 eV to 711.105 eV and 724.703 eV,indicating that the hydroxide in Fe^(0) modified granular sludge was replaced by Sb and combined with O-Fe to form Fe-O-Sb coordination compounds deposited on the surface of granular sludge to achieve antimony removal effect.

关 键 词：厌氧颗粒污泥改性 Fe^(0) Sb(Ⅴ)污染 厌氧废水处理 

分 类 号：TQ135.3[化学工程—无机化工] X703[环境科学与工程—环境工程]