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| 藻类净水除杂系统对微塑料及氮、磷去除效果的影响研究 |
| Study on the effect of algae water purification and decontamination system on microplastics and nitrogen and phosphorus removal effect |
| 投稿时间：2023-10-27 修订日期：2023-11-13 |
| DOI： |
| 中文关键词: 微塑料 养殖尾水 丝状藻 净水除杂系统 |
| 英文关键词: Microplastics Aquaculture tailwater Filamentous algae Water purification and decontamination system |
| 基金项目:江苏省高等学校自然科学基金项目（22KJA170001）、江苏省产学研合作项目（BY2020428）、2022年连云港市第六期 "521工程 "科研项目（LYG06521202265）、江苏省高等学校重点学科建设项目。 |
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| 中文摘要: |
| 微塑料污染和养殖尾水超标排放已成为全球重要问题。在同一系统中，同时研究丝状藻对氮、磷的去除效果和对微塑料的拦截效果尚未见报道。为解决这一问题，本研究构建了一种藻类净水除杂系统，并研究其拦截微塑料和去除水体氮、磷的能力。研究使用水绵（Spirogyra）、浒苔（Enteromorpha）和刚毛藻（Cladophora）3种丝状藻在净水除杂系统中进行微塑料拦截实验，结果表明实验时间为10d时，3种丝状藻对纤维状微塑料拦截效果最佳（水绵88.50%；浒苔79.50%；刚毛藻75.50%），对颗粒状微塑料拦截效果最差（水绵67.50%；浒苔53.00%；刚毛藻55.00%）。与其它两种藻类相比水绵对微塑料具有更好的拦截效果，因此使用其进行水体氮、磷去除实验。按照单位面积的藻量分为0 g/dm2（空白control）、2 g/dm2、4 g/dm2和6 g/dm2 ，水绵在15d的实验中对TN去除率最高为91.88%（4 g/dm2）；对TP去除率最高为90.33%（6 g/dm2）；对PO4-P去除率最高为90.38%（6 g/dm2）。4 g/dm2与6 g/dm2实验组的实验结果并无显著差异（p>0.05）。研究表明，净水除杂系统可以有效的去除水体中纤维状微塑料和吸收水体氮、磷，并且4 g/dm2的单位面积藻量是本净水除杂系统去除氮、磷最适宜的藻量。 |
| 英文摘要: |
| Microplastic pollution and excessive discharge of aquaculture tail water have become important issues globally. Simultaneous study of the removal effects of filamentous algae on nitrogen and phosphorus and the interception of microplastics in the same system has not been reported. To address this issue, this study constructed an algal water purification and removal system and investigated its ability to intercept microplastics and remove nitrogen and phosphorus from the water column. The study used three kinds of filamentous algae, Spirogyra, Enteromorpha and Cladophora, to conduct microplastic interception experiments in the system, and the results showed that the three kinds of filamentous algae had the best effect on the interception of fibrous microplastics at the time of the experiment of 10d (88.50% for Spirogyra; 79.50% for Enteromorpha; 75.50% for Cladophora) The three species of filamentous algae were the most effective in intercepting fibrous microplastics (88.50%; 79.50%; 75.50%) and the least effective in intercepting granular microplastics (67.50%; 53.00%; 55.00%). Spirogyra had a better interception effect on microplastics compared to the other two algae, so it was used for the nitrogen and phosphorus removal experiments in the water column. According to the amount of algae per unit area was divided into 0g/dm2 (control), 2g/dm2, 4g/dm2 and 6g/dm2, Spirogyra had the highest TN removal rate of 91.88% (4g/dm2), TP removal rate of 90.33% (6g/dm2), and PO4-P removal rate of 90.38% (6g/dm2) in the 15d experiment. 4g/dm2 was the highest removal rate of 90.38% (6g/dm2), and 4g/dm2 was the highest removal rate of 90.38% (6g/dm2). There was no significant difference between the experimental results of 4g/dm2 and 6g/dm2 experimental groups (p>0.05). The study showed that the system can effectively remove fibrous microplastics and absorb nitrogen and phosphorus from the water body, and that the algal amount per unit area of 4g/dm2 is the most suitable algal amount for removing nitrogen and phosphorus in this system. |
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