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中国农学通报

中国农学通报 ›› 2023, Vol. 39 ›› Issue (13): 79-86.doi: 10.11924/j.issn.1000-6850.casb2022-0842

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

硫酸铜和过氧化钙对海水及沉积物磷赋存形态的影响

黄桂芳1(), 魏祥涛2, 李林蔚2, 梁介宁2, 白伟浩2, 葛长字2   

  1. 1 福建省水产研究所，福建厦门 361013
    2 山东大学海洋学院，山东威海 264209
  • 收稿日期:2022-10-10 修回日期:2023-01-31 出版日期:2023-05-05 发布日期:2023-04-27
  • 通讯作者: 黄桂芳，男，1972年出生，福建莆田人，副研究员，学士，研究方向：海洋环境影响评价。通信地址：361013 厦门市东渡海山路7号，Tel：0592-5678578，E-mail：435517761@qq.com。
  • 作者简介:

    黄桂芳，男，1972年出生，福建莆田人，副研究员，学士，研究方向：海洋环境影响评价。通信地址：361013 厦门市东渡海山路7号，Tel：0592-5678578，E-mail：。

  • 基金资助:
    福建省省属公益类科研院所基本科研专项“多目标养殖区域养殖容量评估——以三沙湾为例”(2020R10130014); 国家重点研发计划“网箱养殖对底栖生态环境的影响与修复机制”(2018YFD0900704); 国家自然科学基金“菲律宾蛤仔的生境改良作用对大叶藻实生幼苗建成的促进应”(31972796)

Effects of CuSO4 and CaO2 on the Forms of Phosphorus in Seawater and Sediments

HUANG Guifang1(), WEI Xiangtao2, LI Linwei2, LIANG Jiening2, BAI Weihao2, GE Changzi2   

  1. 1 Fisheries Research Institute of Fujian, Xiamen, Fujian 361013
    2 Marine College, Shandong University, Weihai, Shandong 264209
  • Received:2022-10-10 Revised:2023-01-31 Online:2023-05-05 Published:2023-04-27

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摘要：

生源要素磷的生态功能受其赋存形态影响，金属阳离子和DO影响其赋存形态转化，故推断渔药CuSO4和CaO2影响磷的赋存形态。为验证这一假说，分别在充气和不充气的条件下将海水和沉积物分别暴露于浓度为0、0.35、0.70、1.05 mg/L的CuSO4和浓度为0、5.00、35.00、50.00 mg/L的CaO2中，21 d后测定上覆海水和间隙水的总磷(TP)、活性磷酸盐(IP)浓度，沉积物中的总磷(TP)、盐酸可浸取态磷(HCl-P)、可交换态磷(Ex-P)含量。结果表明：充气时，CuSO4降低上覆水IP浓度和沉积物TP含量，增加沉积物Ex-P含量；不充气时，CuSO4降低上覆水TP浓度和沉积物TP、Ex-P含量，增加间隙水IP浓度；充气时，过氧化钙降低上覆水IP、TP浓度，增加沉积物HCl-P和Ex-P含量；不充气时，过氧化钙降低上覆水TP浓度，增加间隙水IP浓度和沉积物Ex-P含量。因此，CuSO4和CaO2将水体中磷封存于沉积物，有降低水体IP的潜力。

关键词: 过氧化钙, 可交换态磷, 硫酸铜, 盐酸可浸取态磷, 总磷

Abstract:

The ecological function of biogenic element phosphorus is affected by its forms, and metal cations and DO affect its forms transformation. It is inferred that the fish drugs CuSO4 and CaO2 affect the phosphorus forms. To test this hypothesis, seawater and sediments were exposed to CuSO4 at concentrations of 0, 0.35, 0.70 and 1.05 mg/L, and CaO2 at concentrations of 0, 5.00, 35.00 and 50.00 mg/L respectively under aerated and unaerated conditions. After 21 days, the concentrations of total phosphorus (TP), reactive phosphate (IP) in seawater and the content of total phosphorus (TP), hydrochloric acid leachable phosphorus (HCl-P) and exchangeable phosphorus (Ex-P) in sediments were determined. The results showed that: under aeration, CuSO4 reduced the IP concentration of overlying water and sediment TP content, and increased the sediment Ex-P content. Without aeration, CuSO4 reduced the TP concentration and the sediment TP and Ex-P, and increased the IP concentration of gap water. Under aeration, calcium peroxide reduced the overlying IP and TP concentration, and increased the sediment HCl-P and Ex-P. Without aeration, calcium peroxide reduced the overlying TP concentration, and increased the gap water IP concentration and sediment Ex-P content. Thus, CuSO4 and CaO2 sequester the phosphorus in water body in sediments, and both of them have the potential to reduce IP in water body.

Key words: calcium peroxide, exchangeable phosphorus, copper sulfate, hydrochloric acid leachable phosphorus, total phosphorus