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“微超酸”改性硅藻土对Pb2+,Cu2+,Cd2+的吸附性能研究
引用本文:张馨予,彭敬东.“微超酸”改性硅藻土对Pb2+,Cu2+,Cd2+的吸附性能研究[J].西南师范大学学报(自然科学版),2018,43(9):90-94.
作者姓名:张馨予  彭敬东
作者单位:西南大学附属中学;西南大学化学化工学院
摘    要:以天然硅藻土为原料,通过微波、超声、酸化制备得到"微超酸"改性硅藻土.探讨了该改性硅藻土对水溶液中Pb~(2+)、Cu~(2+)、Cd~(2+)3种重金属离子的吸附效果及影响因素.实验结果表明,在一定范围内,提高溶液pH值、延长吸附时间、升高吸附温度、增加吸附剂的用量均可提高3种金属离子的吸附去除效果;"微超酸"改性硅藻土对3种金属离子的等温吸附符合Langmuir方程.

关 键 词:硅藻土  改性  重金属  吸附
收稿时间:2017/9/14 0:00:00

On Absorption of Pb2+, Cu2+, Cd2+ ions by Modified Diatomite
ZHANG Xin-yu,PENG Jing-dong.On Absorption of Pb2+, Cu2+, Cd2+ ions by Modified Diatomite[J].Journal of Southwest China Normal University(Natural Science),2018,43(9):90-94.
Authors:ZHANG Xin-yu  PENG Jing-dong
Institution:1. High School Affiliated to Southwest University, Chongqing 400715, China;2. School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
Abstract:In this assay, the modified diatomite is prepared via processes of microwave, ultrasound, and acid treatments to natural diatomite. Meanwhile, those key experimental parameters are optimized to achieve high-efficacy absorption of Pb2+, Cu2+, Cd2+ in aqueous phases on modified diatomite. The experimental results indicate that, with the increase of pH value, absorption time, temperature and quantity of sorbent, the effects on the absorption of Pb2+, Cu2+, Cd2+ were improved. Moreover, the models of isothermal absorption of Pb2+, Cu2+, Cd2+ ions are demonstrated according to Langmuir equations.
Keywords:diatomite  modification  heavy metal ions  absorption
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