| 不同分子量富里酸对藻毒素紫外光降解的影响 |
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| 引用本文： | 王刚,张夏瑶,王菲凤,孙启元.不同分子量富里酸对藻毒素紫外光降解的影响[J].环境工程,2022,40(1):32-37. |
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| 作者姓名： | 王刚 张夏瑶 王菲凤 孙启元 |
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| 作者单位： | 福建师范大学 环境科学与工程学院, 福州 350007 |
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| 基金项目： | 国家自然科学基金项目(52070044)； |
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| 摘 要： | 蓝藻在生长繁殖过程中会向水体中释放具有生物毒性的微囊藻毒素(MC-LR),对人体健康存在潜在威胁.富里酸(FA)是水体中广泛存在的水环境介质,其不同分子量组分对MC-LR光降解的影响机理尚未明确.通过紫外光照实验,探究不同分子量FA及相关条件因素对紫外光降解MC-LR效果的影响.结果表明:MC-LR的降解率随着pH值的...
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| 关 键 词： | 富里酸 藻毒素 光催化 影响因素 降解动力学 |
| 收稿时间： | 2021-04-13 |
EFFECT OF FULVIC ACID WITH DIFFERENT MOLECULAR WEIGHT ON UV DEGRADATION OF MICROCYSTINS |
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| WANG Gang,ZHANG Xiayao,WANG Feifeng,SUN Qiyuan.EFFECT OF FULVIC ACID WITH DIFFERENT MOLECULAR WEIGHT ON UV DEGRADATION OF MICROCYSTINS[J].Environmental Engineering,2022,40(1):32-37. |
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| Authors: | WANG Gang ZHANG Xiayao WANG Feifeng SUN Qiyuan |
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| Affiliation: | School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China |
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| Abstract: | Cyanobacteria releases biotoxic microcystin(MC-LR) into the water column during its growth and reproduction, which is a potential threat to human health. Fulvic acid(FA) is a widely present aqueous environmental medium in water bodies, and the mechanism of its different molecular weight components on the photodegradation of MC-LR is unknown. In this study, we investigated the effects of molecular weight of FA and related condition factors on UV degradation of MC-LR through UV illumination experiments. The results showed that the degradation rate of MC-LR decreased and then increased with the increase of pH value; the degradation rate of MC-LR was 60.10% after 120 min of UV degradation in pure water; after FA was added, the degradation rate of MC-LR increased with the increase of its concentration, and 62.18% of MC-LR was degraded at 10 mgC/L. Under different molecular weight FA, the degradation rate range of MC-LR was 54.52%~65.61%, and the degradation process was in good accordance with the first-order reaction kinetic equation.The apparent rate constant was the highest when the molecular weight was 3~5 kDa and the concentration was 10 mgC/L, which was 0.03303 min-1. This study provided a reference for optimizing the conditional ratio between FA and MC-LR and promoting the degradation of MC-LR. |
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