磷酸活化法脱墨污泥活性炭的改性研究  

Research on Modification of Activated Carbon from Deinking Sludge

作　　者：万月亮 孟祥美 冯琨 孔话峥 刘廷志 WAN Yueliang;MENG Xiangmei;FENG Kun;KONG Huazheng;LIU Tingzhi(Tianjin Key Laboratory of Pulp&Paper,Tianjin University of Science&Technology,Tianjin,300457)

机构地区：[1]天津科技大学造纸学院天津市制浆造纸重点实验室

出　　处：《中国造纸学报》2019年第3期31-37,共7页Transactions of China Pulp and Paper

摘　　要：以Cr(Ⅵ)离子吸附效果为目标,对磷酸活化法制备的脱墨污泥活性炭进行改性。通过改性效果对比,确定了HNO 3改性方法,并对其改性工艺进行了优化。得到最佳改性条件为:10 mol/L的HNO 3作为改性剂、炭酸比1∶15(m∶V)、改性2.0 h。改性后活性炭用于废水吸附以去除Cr(Ⅵ)离子,在改性活性炭用量为5.00 g/L时,Cr(Ⅵ)离子的去除率和吸附量分别达到83.9%和25.17 mg/g,与未改性活性炭相比,吸附量提高了140.3%。改性活性炭的碘吸附值和亚甲基蓝吸附值分别达到543.92 mg/g和103.5 mg/g,碘吸附值提高了28.9%,而亚甲基蓝吸附值略有降低。N 2吸附-脱附表明,与未改性活性炭相比,HNO 3改性活性炭比表面积从715.576 m^2/g增至1020.161 m^2/g,增大了42.6%;总孔容由0.353 cm^3/g增长到0.608 cm^3/g,提高了72.4%;中孔孔容由0.344 cm^3/g增长到0.393 cm^3/g,增长了14.2%。结果表明,HNO 3改性可大幅提升脱墨污泥活性炭对Cr(Ⅵ)离子吸附性能。The activated carbon prepared from deinking sludge was modified and applied to the adsorption of Cr(Ⅵ)ion,the optimal modification conditions were determined as follows:modifier was 10 mol/L HNO3,1∶15(m∶Ⅴ),modification time 2.0 h.The modified activated carbon was used to remove Cr(Ⅵ)ion from waste water.When the amount of modified activated carbon was 5 g/L,the removal rate and adsorption capacity of Cr(Ⅵ)ion were 83.9%and 25.17 mg/g,respectively,and the adsorption capacity increased by 140.3%compared with that of unmodified activated carbon,the iodine adsorption value and methylene blue adsorption value of the activated carbon were 543.92 mg/g and 103.5 mg/g respectively,the iodine adsorption capacity increased by 28.9%.The specific surface area of activated carbon was 1020.161 m 2/g,increased by 42.6%,the total pore volume was about 0.608 cm^3/g,increased by 72.4%and the mesopore volume was about 0.393 cm^3/g,increased by 14.2%,based on the calculation by the N2 adsorption-desorption experiment.

关 键 词：脱墨污泥 活性炭 改性 Cr(Ⅵ)离子吸附 

分 类 号：TS78[轻工技术与工程—制浆造纸工程]