| 张丽,宣李,黎晓宁,于纹鉴,李娟英,王茜,尹杰.磁性活性炭原位修复养殖底泥中多溴联苯醚（PBDEs）的研究[J].农业环境科学学报,2020,39(8):1818-1827. |
| 磁性活性炭原位修复养殖底泥中多溴联苯醚（PBDEs）的研究 |
| Effect of magnetic activated carbon on the recovery of polybrominated diphenyl ethers in aquaculture sediments |
| 投稿时间：2019-10-25 |
| DOI：10.11654/jaes.2019-1172 |
| 中文关键词: 磁性活性炭 多溴联苯醚 生物累积 养殖底泥 |
| 英文关键词: magnetic activated carbon polybrominated diphenyl ether bioaccumulation aquaculture sediment |
| 基金项目:上海市科委科技基金项目（18050502100） |
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| 中文摘要: |
| 为控制养殖底泥中有机污染物的迁移性并降低其生物可利用性，从而保障水产品的质量安全，分别以普通活性炭（PAC）和磁性活性炭（MPAC）为修复材料，将其应用到受多溴联苯醚（PBDEs）污染的养殖池塘底泥中，以菲律宾蛤仔（R.philippinarum）为受试生物，通过底泥生物有效性实验和生物累积实验分别探究活性炭对底泥中PBDEs的原位修复效果。结果表明：磁化前后，MPAC的比表面积和孔容积均略低于PAC，平均孔径显著增加，两者均能较容易地对PBDEs进行吸附，与PAC相比，MPAC虽对PBDEs的吸附速率较慢，但吸附量却小幅度增加；目标养殖池塘水产品的食用风险较低，但底泥中四溴、五溴联苯醚存在较高的潜在生态风险，且水产品对底泥中目标化合物已表现出明显的生物富集性；修复效果表明PAC和MPAC均可对PBDEs污染养殖环境进行修复，尤其是对底泥中可能产生生态风险的四溴、五溴联苯醚修复效果较好，且最优投加比例分别为3%和1.5%，但在实际现场修复过程中考虑到MPAC具有较低的投加量及磁性可回收循环利用的特点，因此可能更适合作为PBDEs污染养殖池塘底泥的修复材料。研究证实，MPAC在修复底泥中PBDEs方面有积极作用，不仅可控制底泥中PBDEs的迁移性，还可显著降低其生物有效性，对水产品养殖环境的改善及质量的提升具有积极作用。 |
| 英文摘要: |
| In order to control the migration of organic pollutants in aquaculture sediment and reduce their bioavailability, and to ensure the quality and safety of aquatic products, particular activated carbon(PAC)and magnetic particular activated carbon(MPAC)were used to control PBDEs in sediments of aquaculture farm ponds. The in-situ remediation effects of PAC and MPAC were assessed by measuring the bioavailability of PBDEs in the sediments and the corresponding bioaccumulation concentrations. R. philippinarum was selected as the test organism. The results showed that although the specific surface area and pore structure of MPAC were slightly lower than those of PAC, before and after magnetization, the overall difference was not very large, the average aperture of MPAC increased significantly, and both kinds of activated carbon can easily adsorb PBDEs. Compared with PAC, MPAC has a slower adsorption rate for PBDEs, but a slightly higher adsorption capacity due to the magnetization. Risk assessment suggested that the studied aquaculture products posed a low dietary risk, whereas the PBDEs in sediments did pose a potential ecological risk, with PBDEs and pentaBDEs posing the greatest risk of the monomers. Aquatic products have shown obvious bio-enrichment in the target compound in bottom mud. The repair effect shows that both PAC and MPAC can repair PBDE pollution in the aquaculture environment, especially that of PBDE and pentaBDE, with an optimal investment ratio of 3% and 1.5%, respectively. However, in the actual site repair process, the characteristics of MPAC(low cost and magnetically recyclable)make it a more suitable repair material for PBDE-contaminated bottom mud in aquaculture ponds. Overall, this study demonstrated that MPAC is a better remediation material than PAC due to its advantages in controlling the migration of organic pollutants, reducing the bioavailability of PBDEs, and ensuring the food safety of cultured products. |
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