牡蛎壳粉对水体中低浓度重金属离子的吸附性能研究

福建水产 ›› 2013, Vol. 35 ›› Issue (3): 193-202.

牡蛎壳粉对水体中低浓度重金属离子的吸附性能研究

林荣晓¹,苏永昌¹,杨妙峰¹,罗方方²,吴成业¹

1. 福建省水产研究所
2. 集美大学

收稿日期:2013-01-29 修回日期:2013-03-13 出版日期:2013-06-25 发布日期:2013-07-02
通讯作者: 吴成业
基金资助:
福建省省属公益类科研院所基本科研专项

The study on adsorptive capability of oyster shell powder adsorbing low concentration of Heavy metal ions in Water

Received:2013-01-29 Revised:2013-03-13 Online:2013-06-25 Published:2013-07-02
Contact: wu chengye

摘要/Abstract

摘要： 为研究牡蛎壳粉对水体中常见重金属离子的吸附性能，实验中分别探讨了牡蛎壳粉在不同添加量、重金属离子浓度、吸附温度、酸碱环境、吸附时间下对水体中Cu2+、Zn2+、Pb2+、Cd2+、Cr(Ⅵ)的吸附情况；并进行牡蛎壳粉吸附动力学、热力学实验研究和SEM图谱分析。结果显示，牡蛎壳粉的最适宜吸附条件为常温下，添加量1 g/L,溶液初始pH值为5.5，吸附时间为24 h.此时其对水体中浓度为1 mg/L的Cu2+、Zn2+、Pb2+、Cd2+、Cr(Ⅵ)等5种重金属离子的去除率分别为84.96%、76.77%、78.57%、51.99%和41.39%，且随着溶液初始浓度的上升，牡蛎壳粉对5种重金属离子的吸附量呈上升趋势，饱和吸附量分别为9.43、9.65、9.03、4.67、1.83 mg/g；牡蛎壳粉对5种重金属离子的吸附符合准二级动力学方程和Langmuir等温模型；SEM图谱表明吸附Cu2+、Zn2+、Pb2+的牡蛎壳粉表面均有二次固体生成，吸附Cd2+、Cr(Ⅵ)的牡蛎壳粉表面无明显现象。

关键词: 牡蛎壳粉, 水体, 重金属离子, 吸附, Oyster shell powder, water, Heavy metal ions, Adsorption

Abstract: In order to study the adsorptive capability of oyster shell powder adsorbing low concentration heavy metal ions in water, five kinds of heavy metal ions Cu2+,Zn2+,Pb2+,Cd2+,Cr(Ⅵ)has been added in the water, the influence of adding different amount, adsorption temperature, pH value, adsorption time and initial concentration of solution has been discussed. And it also carried out dynamics research, thermodynamic study and SEM analysis. Results showed that Cu2+,Zn2+,Pb2+ has a good removal capacity, but Cd2+、Cr(Ⅵ) is relatively weak. The adsorption by oyster shell powder is in line with the secondary kinetic equation and the Langmuir isotherm model. The SEM maps indicated that secondary solid was built on the oyster shell powder surface after adsorbing Cu2+,Zn2+,Pb2+ and no obvious phenomena on the surface after adsorbing Cd2+,Cr(Ⅵ).

中图分类号:

X714

林荣晓苏永昌杨妙峰罗方方吴成业. 牡蛎壳粉对水体中低浓度重金属离子的吸附性能研究[J]. 福建水产, 2013, 35(3): 193-202.

[1]	牛曰华. 全自动固相萃取-超高效液相色谱法测定淡水养殖水体中的呋喃丹[J]. , 2017, 39(5): 386-391.
[2]	苏永昌林荣晓刘秋凤刘淑集吴成业. 改性牡蛎壳粉的制备及其对Cd2+的吸附[J]. , 2015, 37(6): 460-470.
[3]	林静陈财珍郑盛华陈宇锋钟硕良. 东山湾水体和沉积物中有机碳的春夏季分布特征[J]. 福建水产, 2013, 35(5): 335-342.