改性红麻秆芯对Pb和As的快速吸附研究  

Study on rapid adsorption of Pb and As by modified kenaf core

作　　者：廖丽萍[1] 冷鹃[1] 段盛文[1] 刘亮亮[1] LIAO Li-ping;LENG Juan;DUAN Sheng-wen;LIU Liang-liang(Institute of Bast Fiber Crops,Chinese Academy of Agricultural Sciences,Changsha 410205,China)

机构地区：[1]中国农业科学院麻类研究所,湖南长沙410205

出　　处：《应用化工》2023年第6期1735-1738,共4页Applied Chemical Industry

基　　金：国家麻类产业技术体系建设专项(CARS-16-E22);中国农业科学院科技创新工程(ASTIP-IBFC05)。

摘　　要：用改性红麻秆芯快速吸附废水中微量共存的Pb、As离子,考察了酸碱改性、碳酸钠浓度、改性反应时间等对吸附性能的影响。结果表明,相比于盐酸、柠檬酸和氢氧化钠,碳酸钠改性红麻秆芯对Pb和As均有较好的吸附。最佳改性工艺为:红麻秆芯与0.1 mol/L碳酸钠溶液的固液比1∶80 g/mL,在室温(25℃左右)下以400 r/min搅拌反应30 min。用0.5 g碳酸钠改性红麻杆芯处理50 mL 0.1 mg/L的Pb、As废水,在25℃恒温水浴中,以200 r/min振荡反应30 min,去除率可分别达到77.7%和21.5%。吸附过程可用准二级动力学方程描述,表明该吸附过程属于化学吸附。In order to rapidly adsorb trace coexisting Pb and As ions in wastewater by modified kenaf core,the effects of acid-base modification,concentration of sodium carbonate and modification time on the adsorption performance were investigated.The results showed that compared with hydrochloric acid,citric acid and sodium hydroxide,sodium carbonate modified kenaf core had better adsorption both of Pb and As.The optimum modification conditions were:the solid-liquid ratio of kenaf core to 0.1 mol/L sodium carbonate solution was 1∶80 g/mL,and the reaction was stirred at 400 r/min at room temperature(about 25℃)for 30 min.The removal rate could reach 77.7% and 21.5% respectively when 50 mL,0.1 mg/L Pb and As wastewater was treated by 0.5 g sodium carbonate modified kenaf core,oscillating in the 25℃ constant temperature water bath at 200 r/min for 30 min.The adsorption process can be described by the pseudo-second order model,which indicates that it is chemical adsorption.

关 键 词：红麻秆芯 改性 PB AS 吸附 

分 类 号：TQ424.2[化学工程]