期刊论文

Adsorption of Cd~(2+) and Pb~(2+) by narrow-leaf cattail activated carbon and mechanism analysis

Tang, C.

中文

环境工程学报

1673-9108

2016

10

1

181-188

13C1141:教育厅项目 2012FJ3144:湖南省科技厅项目 :中南林业科技大学环境科学与工程学院资助项目

本校为第一且通讯机构

为了解狭叶香蒲(Typha angustifolia L.)活性炭的吸附性能及其机理,采用磷酸一步活化法制备了狭叶香蒲活性炭,并对其理化性质进行了表征;通过静态实验,研究了溶液起始pH、Cd~(2+)和Pb~(2+)浓度、吸附时间、温度、活性炭剂量对狭叶香蒲活性炭吸附水溶液中Cd~(2+)和Pb~(2+)的影响。狭叶香蒲活性炭对Cd~(2+)和Pb~(2+)的吸附量随溶液起始pH与温度的增加而增加,吸附平衡时间约为10 min;热力学分析表明,吸附过程自发而且吸热,吸附动力学实验结果符合拟二级动力学模型,Langmuir吸附等温模型能更好地拟合狭叶香蒲活性炭对Cd~(2+)的吸附,Pb~(2+)的平衡吸附量与Freundlich模型的拟合性更好。25℃条件下,由...

To understand the adsorption characteristics and mechanism of narrow-leaf cattail activated carbon, activated carbon were prepared using Typha angustifolia L by phosphoric acid activation, and its physicochemical properties were characterized. The effects of initial pH value, concentration of Cd2+ and Pb2+, adsorption time, temperature, and dose of activated carbon on the adsorption of Cd2+ and Pb2+ from aqueous solution were investigated. The adsorption capacity of Cd2+ and Pb2+ on narrow-leaf cattail activated increased with the increase of i...