硫酸铜和过氧化钙对海水及沉积物磷赋存形态的影响  

Effects of CuSO 4 and CaO 2 on the Forms of Phosphorus in Seawater and Sediments

作　　者：黄桂芳[1] 魏祥涛 李林蔚 梁介宁 白伟浩 葛长字[2] HUANG Guifang;WEI Xiangtao;LI Linwei;LIANG Jiening;BAI Weihao;GE Changzi(Fisheries Research Institute of Fujian,Xiamen,Fujian 361013;Marine College,Shandong University,Weihai,Shandong 264209)

机构地区：[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

出　　处：《中国农学通报》2023年第13期79-86,共8页Chinese Agricultural Science Bulletin

基　　金：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)。

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CuSO_(4)和CaO_(2)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CuSO_(4)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(HClP)、可交换态磷(Ex-P)含量。结果表明:充气时,CuSO_(4)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,CuSO_(4)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,CuSO_(4)和CaO_(2)将水体中磷封存于沉积物,有降低水体IP的潜力。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 CuSO 4 and CaO 2 affect the phosphorus forms.To test this hypothesis,seawater and sediments were exposed to CuSO_(4) at concentrations of 0,0.35,0.70 and 1.05 mg/L,and CaO_(2) 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,CuSO_(4) reduced the IP concentration of overlying water and sediment TP content,and increased the sediment Ex-P content.Without aeration,CuSO 4 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,CuSO_(4) and CaO_(2) sequester the phosphorus in water body in sediments,and both of them have the potential to reduce IP in water body.

关 键 词：过氧化钙 可交换态磷 硫酸铜 盐酸可浸取态磷 总磷 

分 类 号：P593[天文地球—地球化学]