| 藻源溶解性有机质对汞甲基化的影响 |
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| 引用本文： | 李雨桐,何鑫龙,彭一帆,胡勰克,王昱杭,赵婷,吴胜春,梁鹏.藻源溶解性有机质对汞甲基化的影响[J].浙江农林大学学报,2021,38(2):362-368. |
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| 作者姓名： | 李雨桐 何鑫龙 彭一帆 胡勰克 王昱杭 赵婷 吴胜春 梁鹏 |
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| 作者单位： | 1.浙江农林大学 环境与资源学院，浙江 杭州 3113002.浙江农林大学 浙江省土壤污染生物修复重点实验室，浙江 杭州 311300 |
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| 基金项目： | 国家自然科学基金资助项目(21677131)；浙江省新苗人才计划项目(2018R412007) |
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| 摘 要： | 目的 探究藻源溶解性有机质(DOM)各亚组分在不同腐解时间、不同汞(Hg2+)质量浓度下对水体中汞甲基化的影响。 方法 应用树脂串联技术分离藻体DOM的6种亚组分，利用室内培养方式进行Hg2+的甲基化试验。 结果 藻类DOM主要由羟基、烃基和芳环C=C等官能团组成；未经腐解的DOM各亚组分中，疏水性有机组分对汞甲基化的影响高于亲水性有机组分；随腐解时间延长，DOM官能团逐渐减少，疏水性有机组分对汞甲基化的影响表现为先降低后升高；亲水性有机组分抑制汞甲基化。 结论 DOM相对含量的升高抑制了汞的甲基化，DOM降解后，释放出来的Hg2+被微生物重新利用，甲基化程度加剧。图3参24
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| 关 键 词： | 汞 溶解性有机质(DOM) 甲基化 有机质亚组分 藻类 |
| 收稿时间： | 2020-02-01 |
Influence of algal derived dissolved organic matter on mercury methylation in water |
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| LI Yutong,HE Xinlong,PENG Yifan,HU Xieke,WANG Yuhang,ZHAO Ting,WU Shengchun,LIANG Peng.Influence of algal derived dissolved organic matter on mercury methylation in water[J].Journal of Zhejiang A&F University,2021,38(2):362-368. |
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| Authors: | LI Yutong HE Xinlong PENG Yifan HU Xieke WANG Yuhang ZHAO Ting WU Shengchun LIANG Peng |
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| Affiliation: | 1.College of Environmental and Resource Sciences, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China2.Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China |
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| Abstract: | Objective To determine the effects of subcomponents of algae dissolved organic matter (DOM) on mercury methylation at different decomposition intervals and different Hg2+ concentrations. Method Six subcomponents of the DOM derived from the algae through a tandem connection of resin, and then conducted simulation experiments separately. Result Algae DOM was mainly composed of hydroxyl group, alkyl group and C=C of aromatic hydrocarbon, etc. Different subcomponents of DOM before decomposition, the influence of hydrophobic component on mercury methylation was significantly stronger than that of hydrophilic component. With the progress of algal decomposition, the relative content of functional groups was gradually decreasing while the influence of hydrophobic components on Hg methylation first weakened and then enhanced during the decomposition process and hydrophilic component can inhibit Hg methylation. Conclusion The increase in relative content of DOM results in the inhibition of Hg methylation. After the decomposition of DOM, the Hg2+ released got methylated by bacteria again, which helped promote the degree of methylation. Ch, 3 fig. 24 ref.] |
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