| 摘要: |
| 模拟研究厦门市污水排海时污水-海水混合过程中磷含量和形态的变化,及其在海水-颗粒物界面交换的动力学过程;提供转移模式,确定转移速率,进行磷的容量校正,为厦门西海域环境容量估算和水质控制提供定量参数和理论依据。 |
| 关键词: 污水 海水 磷 转移 动力学 |
| DOI： |
| 分类号: |
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| TRANSFER KINETICS OF PHOSPHORUS IN WASTEWATER-SEAWATER MIXING SYSTEM |
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Chen Song, Lin Rujian, Liao Wenzhuo
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Third Institute of Oceanography, SOA, Xiamen 361005
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| Abstract: |
| An experimental wastewater-seawater mixing system was set up to study the transfer of phosphorus during mixing of seawater with wastewater discharged into Xiamen Bay. Phosphorus was adsorbed on the first day and then was released continually from particulate form. Dissolved phosphorus is the major species of phosphorus in the mixed water body.
The particulate phosphorus released can be expressed by the exchange-adsorption kinetic equation t/xP(t) = t/xP(eq) + B'. The values of xP(eq) and ΔxP(eq) calculated from the equation are very close to those measured. The maximum of phosphorus released under specified conditions can also be estimated.
The increase rate of dissolved phosphorus is governed by the first-order kinetic model: lnC = k1pt + B. A linear relationship exists between rate constant (k1p) and the initial adsorption rate (a0); k1p = 0.32a0 + 0.016. The net increase rate is k0(1P) ~ 0.02/d. It has been estimated that if 102 tons of wastewater are discharged a day, the environmental phosphorus capacity of the sea area will reduce by 5 kg every day because of the release of particulate phosphorus into the water body. |
| Key words: Wastewater, Seawater, Phosphorus, Transfer Kinetics |
