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试图使用实验性控制系统研究垃圾填埋地覆盖土壤中的双价的光还原率

Zhengkai Tao¹, Yiqing Fan², Qingyun Zhang¹

¹School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China.

Waste management (New York, N.Y.)

|March 2, 2025

概括

垃圾填埋场土壤的 (Hg) 排放量因湿度而减少,但由于Hg (II) 度和温度而增加. 太阳辐射驱动Hg光降解,这是一个关键的排放过程.

科学领域:

环境科学环境科学
大气化学大气化学
地质化学地质化学

背景情况:

垃圾填埋场覆盖土壤的 (Hg) 排放对大气Hg预算产生重大影响.
虽然研究了土壤Hg排放,但土壤中Hg的光降解率仍然没有得到充分的研究.

研究的目的:

调查土壤Hg的度,湿度和温度对Hg排放的影响.
在各种环境条件下确定土壤Hg的光还原率.

主要方法:

利用两个实验控制系统来模拟填埋场覆盖土壤条件.
不同的土壤Hg度,湿度水平和温度来评估Hg排放率.
应用数据拟合和公式计算,以确定光还原率.

主要成果:

高土壤Hg(II) 度和温度增加Hg的排放.
增加的土壤湿度显著抑制了Hg的排放.
太阳辐射是一个关键因素,光减光是主要的Hg发射途径.

结论:

土壤Hg排放是一个复杂的过程,受多种环境因素的影响.
在不同的条件下,光还原速率有很大差异,从1.49-8.54 × 10−10 m2 s−1 W−1.1.
发现有助于开发基于过程的模型,用于土壤Hg排放和垃圾填埋场Hg管理.

关键词:

流体室是一种流体室.Hg 排放量 Hg 的排放量土壤水分土壤水分土壤温度土壤温度.在土壤中,Hg度是Hg度.

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