üHong-tao1,2;SHI Rong1,2" /> 海水中主要无机阴离子对针铁矿吸附镉的影响
欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

海水中主要无机阴离子对针铁矿吸附镉的影响

陈亮1,2;贾永锋1;张雪霞1,2;吕洪涛1,2;石荣1,2   

  1. 1中国科学院沈阳应用生态研究所, 沈阳 110016; 2中国科学院研究生院, 北京 100039
  • 收稿日期:2008-01-02 修回日期:1900-01-01 出版日期:2008-08-10 发布日期:2008-08-10

Cadmium adsorption on goethite under effects of main inorganic anions in seawater.

CHEN Liang1,2;JIA Yong-feng1;ZHANG Xue-xia1,2;LüHong-tao1,2;SHI Rong1,2   

  1. 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2008-01-02 Revised:1900-01-01 Online:2008-08-10 Published:2008-08-10

摘要: 采用人工合成针铁矿作为吸附剂,通过序批式试验,研究了pH值以及海水中主要无机阴离子Cl-、SO42-、NO3-和HCO3-对Cd吸附的影响。结果表明:随pH值升高,针铁矿对Cd的吸附量显著增加;Cl-、SO42-和NO3-在pH 8时抑制针铁矿对Cd的吸附;Cl-和SO42-在低pH值条件下促进Cd的吸附;HCO3-在pH 4~10范围内促进Cd吸附;pH 8时,SO42-与Cd加入顺序的不同对吸附结果具有显著影响,先加入Cd时,Cd的吸附量明显大于先加入SO42-和Cd-、SO42-同时加入时Cd的吸附量。

关键词: N2O排放, 控释肥料, 尿素, 稻田

Abstract: Batch adsorption experiment was conducted to study the effects of seawater pH, Cl-, SO42-, NO3- and HCO3- on the adsorption of cadmium on goethite. It was found that cadmium adsorption on goethite was highly pH dependent. The cadmium adsorption was suppressed by Cl-, SO42- and NO3- at pH 8, but enhanced by Cl- and SO42- at low pH. HCO3- promoted the cadmium adsorption at pH 4-10. The order of cadmium and SO42- addition at pH 8 was found to strongly affect the adsorbed amount of cadmium. Much larger amount of cadmium was adsorbed on goethite when cadmium was added first, compared to the conditions when SO42- was added first or when cadmium and SO42- were added simultaneously.

Key words: N2O emission, Controlled release fertilizer, Urea, Paddy field