Effects of three heavy metal ions on nitrosification and nitrification in sea water
WENG Yong-gen, XING Yong, ZHANG Chang-xin, WANG Bin, LEI Yan-zhi
1. Department of Applied Chemistry, Yantai University ,Yantai 264005, China; 2. School of Life Science and Technology, Dalian Fisheries Univ. , Dalian 116023, China;3. Panjing Guanghe Aquatic Product Ltd. , Panjing 124200, China
Abstract: The effects of heavy metal ions Cu^＋2 , Cd^2＋ , and Zn^2＋ on nitrosification and nitrification in sea water were studied by changes in concentration of NO^-2 - N from ammonia - oxidizing bacteria. It was found that concentration of NO^-2 - N significantly slowly increased at 0.1, 0.5 and 1.0 mg/L Cu^2＋ and Cd^2＋ and 0.5, 1.0 and 5.0 mg/L Zn^2＋ compared with control group. The order of nitrosification inhibition from highest to lowest arranged as Cu^2＋ 〉 Cd^2＋ 〉 Zn^2＋ ,which is consistent with stability of sulfates. There was no significant difference in decrease in concentration of NO^-2 - N at low concentrations of Cu^2＋ , Cd^2＋ and Zn^2＋ compared with control group. However, significant inhibition occurred when the concentration of Cu^2＋ and Cd^2＋ was 5.0 mg/L. There was no effect of Zn^2＋ on nitrosification and nitrification. The order of nitrification inhibition from highest to lowest was arranged as Cu^2＋ 〉 Cd^2＋ 〉 Zn^2＋.
翁永根, 邢永, 张长新, 王斌, 雷衍之. 3种重金属离子对海水中亚硝化、硝化作用的影响[J]. 大连海洋大学学报, 2006, 21(1): 51-54.
WENG Yong-gen, XING Yong, ZHANG Chang-xin, WANG Bin, LEI Yan-zhi. Effects of three heavy metal ions on nitrosification and nitrification in sea water. Journal of Dalian Ocean University, 2006, 21(1): 51-54.
2006, Vol. 21 
