| 3种重金属离子对海水中亚硝化、硝化作用的影响 |
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| 引用本文： | 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]. 大连水产学院学报, 2006, 21(1): 51-54 |
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| 作者姓名： | 翁永根 邢永 张长新 王斌 雷衍之 |
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| 作者单位： | 烟台大学,应用化学系,山东,烟台,264005;大连水产学院,生命科学与技术学院,辽宁,大连,116023;盘锦光合水产有限公司,辽宁,盘锦,124200;大连水产学院,生命科学与技术学院,辽宁,大连,116023 |
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| 基金项目： | 欧盟第五框架研究开发基金;辽宁省教育厅资助项目 |
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| 摘 要： | 研究了Cu2 、Cd2 、Zn2 3种重金属离子对海水中亚硝化、硝化作用的影响。重金属离子对亚硝化作用影响的试验结果表明:当水体中Cu2 、Cd2 的浓度为0.1、0.5、1.0 mg/L以及Zn2 的浓度为0.5、1.0、5.0 mg/L时,NO2--N浓度的增加量与对照组相比明显缓慢,随着3种重金属离子浓度的增加,此现象不断加强;重金属离子对亚硝化作用抑制程度的顺序为Cu2 >Cd2 >Zn2 ,这与3种金属硫化物的稳定性是一致的。重金属离子对硝化作用影响的试验结果表明:低浓度试验组中NO2--N浓度的减少量与对照组比没有显著性差异,当Cu2 、Cd2 浓度增为5.0 mg/L时,对硝化作用产生明显的抑制;而同浓度的Zn2 对硝化作用却没有抑制;3种重金属离子对硝化作用抑制程度的顺序为Cu2 >Cd2 >Zn2 。试验还发现,Cu2 对硝化作用产生抑制后,其硝化功能很难得到恢复。
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| 关 键 词： | 硝化作用 重金属离子 NO-2-N 抑制 |
| 文章编号： | 1000-9957（2006）01-0051-04 |
| 收稿时间： | 2004-12-22 |
| 修稿时间： | 2004-12-22 |
Effects of three heavy metal ions on nitrosification and nitrification in sea water |
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| 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[J]. Journal of Dalian Fisheries University, 2006, 21(1): 51-54 |
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| Authors: | WENG Yong-gen XING Yong ZHANG Chang-xin WANG Bin LEI Yan-zhi |
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| Affiliation: | 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 |
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| 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 ). |
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| Keywords: | nitrification heavy metal NO~-_2-N inhibition |
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