松花江哨口江段氯苯的多介质迁移和归趋模拟

Simulation of Multimedia Fate of Chlorobenzene in Shaokou Section of the Songhua River

以氯苯为研究对象,利用Ⅲ级多介质逸度模型模拟了稳态假设下第二松花江哨口至松花江村断面的归趋过程,计算了氯苯在大气、水体、悬浮物、沉积物中的分布.结果表明,当污染源以20 molh的速率将氯苯排放至水中,模型输出大气中ρ(氯苯)为1.448×10-2mgm3,水体中为9.503×10-5mgL,悬浮物中w(氯苯)为3.043×10-6gkg(以干质量计),沉积物中为1.270×10-5gkg.其中大气中的氯苯占输入总量的94.931%,说明进入水体中的氯苯在环境系统达到平衡后,主要存在于大气中.水体中氯苯的分布情况为:水相中占98.362%,悬浮物中占0.020%,沉积物中占1.618%,表明水体中的氯苯绝大部分存在于水相中,沉积物和悬浮物中的留存量很少.

A multimedia fugacity model （ level m ） was used to simulate the concentration distribution of chlorobenzene from Shaokou section to Songhua River ViUage section of the Second Songhua River based on a steady-state assumption. The concentration distribution was calculated in the air, water, suspended substance and the sediment. The results showed that the model output concentration in the air, water, suspended substance and the sediment were counted for 1. 448×10^-2 mg/m3 , 9. 503 ×10^-5 mg/L, 3. 043×10^-6g/kg （dw） , 1. 270 ×10^- 5 g/kg respectively, when chlorobenzene was discharged to the water from pollution sources at 20 mol/h of which chlorobenzene in the air was 94. 931% in total, which indicated that after reaching steady-state in the system, chlorobenzene mainly existed in the air. In water environment, chlorobenzene distribution were 98. 362% in water phase, 0. 020% in suspended substance phase and 1. 618% in sediment phase, respectively, which means that most ehlorobenzene in water environment existed in the water phase and few in the suspended substance and the sediment phase.