| 沉积物扰动频率对悬浮物中形态磷数量分布的影响 |
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| 引用本文： | 李勇,李大鹏,黄勇.沉积物扰动频率对悬浮物中形态磷数量分布的影响[J].环境科学与技术,2011,34(10):19-23,34. |
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| 作者姓名： | 李勇 李大鹏 黄勇 |
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| 作者单位： | 苏州科技学院环境科学与工程学院,江苏苏州,215011 |
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| 基金项目： | 国家“十一五”水重大专项(2009ZX07101-013); 国家自然科学基金(50908154); 中国博士后科学基金(20100471417); 江苏省环境科学与工程重点实验室开放课题(ZD091203) |
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| 摘 要： | 实验模拟了沉积物在不同扰动频率条件下的悬浮过程,研究了悬浮物中不同形态磷的数量分布规律,并且探讨了形态磷数量分布对生物有效磷(BAP)的影响。结果表明,扰动作用下上覆水中溶解性磷酸盐(DIP)含量低于对照试验,与较小频率(0.015 mg/L)相比,较大扰动频率下DIP平衡浓度(0.011 mg/L)略低。弱吸附态磷(NH4Cl-P)含量降低,铁铝结合态磷(Fe/Al-P)和钙结合态磷(HCl-P)则有所增加,但是容易释放的非闭蓄态Fe/Al-P(藻类可利用磷)则有所降低。随着扰动时间延长,藻类可利用态磷(AAP)占Fe/Al-P的百分比逐渐降低。试验结束,该值分别降至39.52%(扰动频率较小)和27.68%(扰动频率较大)。说明闭蓄态Fe/Al-P含量有所增加。基于Fe/Al-P的迁移活性,采用NH4Cl-P与AAP估算BAP是合理的。扰动作用下,BAP占Tot-P的百分比逐渐降低,试验结束,BAP占Tot-P的百分比分别降至36.71%(扰动频率较小)和29.67%(扰动频率较大)。
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| 关 键 词： | 扰动 生物有效磷 磷形态 沉积物 |
Effect of Sediment Disturbance Frequency on Phosphorus Forms in Suspended Solids |
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| LI Yong,LI Da-peng,HUANG Yong.Effect of Sediment Disturbance Frequency on Phosphorus Forms in Suspended Solids[J].Environmental Science and Technology,2011,34(10):19-23,34. |
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| Authors: | LI Yong LI Da-peng HUANG Yong |
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| Institution: | LI Yong,LI Da-peng,HUANG Yong(School of Environmental Science and Engineering,University of Science and Technology of Suzhou,Suzhou 215011,China) |
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| Abstract: | Lab-scale experiments were done to investigate the effect of sediment disturbance under different conditions on phosphorus(P)forms in the suspended solids,and contributions of P forms on bioavailable P(BAP)were also discussed.Results showed that the concentrations of dissolved P(DIP) under disturbance conditions were lower than that in control experiment.Equilibrium concentration of DIP was 0.011mg/L under big frequency conditions,lower than that under little frequency conditions,0.015 mg/L.Sequential fract... |
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| Keywords: | disturbance bioavailable phosphorus phosphorus forms sediment |
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