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覆盖材料对洱海不同湖区沉积物溶解态有机磷和无机磷释放影响及差异
摘要点击 90  全文点击 48  投稿时间:2018-07-28  修订日期:2018-10-28
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中文关键词  沉积物  覆盖材料  溶解态有机磷  溶解态机磷  磷释放
英文关键词  sediment  covering material  dissolved organic phosphorus  dissolved inorganic phosphorus  phosphate release
作者单位E-mail
龚佳健 三峡大学水利与环境学院, 宜昌 443002
北京师范大学水科学研究院, 北京 100875
中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 
1223414859@qq.com 
倪兆奎 北京师范大学水科学研究院, 北京 100875
中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
云南省环境科学研究院, 云南省高原湖泊流域污染过程与管理重点实验, 昆明 650034 
 
肖尚斌 三峡大学水利与环境学院, 宜昌 443002  
赵海超 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
云南省环境科学研究院, 云南省高原湖泊流域污染过程与管理重点实验, 昆明 650034
河北北方学院农林科技学院, 张家口 075131 
 
席银 三峡大学水利与环境学院, 宜昌 443002  
王圣瑞 三峡大学水利与环境学院, 宜昌 443002
北京师范大学水科学研究院, 北京 100875
中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
云南省环境科学研究院, 云南省高原湖泊流域污染过程与管理重点实验, 昆明 650034 
wangsr@bnu.edu.cn 
中文摘要
      通过模拟实验探讨了4种覆盖材料对洱海不同湖区沉积物溶解态总磷(DTP)、溶解态有机磷(DOP)和溶解态机磷(SRP)释放影响及差异.结果表明:①与覆盖对照相比,覆盖材料通过改变洱海沉积物pH和Eh及溶解性有机质(DOM)特征,降低了沉积物DTP最大释放量,其中,覆盖氧化铁对洱海北部和南部沉积物DTP释放控制效果较好,与覆盖对照相比,释放量分别减少了44.3%和35.71%;而覆盖氧化铝对中部湖区沉积物DTP释放控制效果较好,与覆盖对照相比,释放量减少了29.6%.②覆盖铁铝氧化物对洱海不同湖区沉积物SRP和DOP释放量影响差异明显,北部湖区沉积物覆盖氧化铁后,SRP和DOP释放量分别降低了35.6%和36.2%,主要是因为其降低了沉积物pH和Eh,而增加了DOM活性所致;中部湖区沉积物覆盖氧化铝后,SRP和DOP释放量分别降低了28.9%和31.6%,与氧化铝促进了该湖区DOM活性密切相关;南部湖区沉积物覆盖氧化铁后,沉积物SRP和DOP释放量分别降低了47.4%和16.5%,则与覆盖氧化铁降低了该湖区沉积物pH和Eh有关.因此,如选择覆盖材料控制洱海不同湖区沉积物磷释放,北部和南部湖区应选择覆盖氧化铁,而中部湖区应选取氧化铝作为覆盖材料.
英文摘要
      In this work, the effects of four covering materials on the release of total dissolved phosphorus (DTP), dissolved organic phosphorus (DOP), and soluble reactive P (SRP) in different sediments of Erhai Lake were simulated. The results showed that the max release of DTP was reduced in covering material, which attributed to the changes of pH, Eh and characteristics of dissolved organic matter (DOM) by the effect of covering material. The application of iron oxide material significant reduced the release of DTP in the northern and southern part of the lake, with decrease rate of 44.3% and 35.7%, respectively. by contrast, the application of aluminum oxide material significant reduced the release of DTP in the middle part sediment, with decrease rate of 29.6%. Furthermore, the release of SRP and DOP in different sediments has significant difference after added different material. In northern part of sediment, the release of SRP and DOP reduced by 35.6% and 36.2% after added iron oxide material. This is because iron oxide can reduce the pH and Eh but increase the availability of DOM in northern, and then benefits for inhibiting the release of SRP and DOP. In the middle, the release of sediment SRP and DOP reduced by 28.9% and 31.6% after added aluminum oxide material. This is because the aluminum oxide can facilitate the availability of DOM in middle, and then inhibits the release of SRP and DOP. In southern part of the lake, the release of sediment SRP and DOP reduced by 47.4% and 16.5% after added iron oxide material. This is largely attributed to the effect of iron oxide on the pH and Eh. Therefore, to control the release of P in the sediment from Lake Erhai, iron oxide material should be selected in the northern and southern parts, whereas aluminum oxide should be selected in the middle part of the lake.

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