土壤镉污染与冶炼烟气的相关性研究

Correlative research on Cd pollution of soil and smelting fume

将未受污染土壤置于某冶炼厂133 m烟囱下风向不同距离处,对受试土壤镉含量的变化与冶炼厂气型镉排量、降尘镉含量、排烟距离之间的相关性及土壤镉的累积效应进行了3个完整气候周期的研究,并与试验点相同位置降尘和原土镉含量多年监测值进行对比分析,用降尘和土壤历史监测数据、冶炼厂相应的气型镉排量与本项研究结果进行统计检验,结果表明降尘镉含量、土壤镉污染及其累积规律与冶炼烟气镉排量呈显著相关,且冶炼烟气对下风地区土壤的影响距离达10 km以上。图1,表7,参12。

On this research, we carried out an experiment on several pieces of unpolluted soil which are setted on the different distance of the subjacent wind direction of a 133m chimney of a smeltery, taking research on the correlation of the changement of Cd content of the tested soil with the gas-Cd discharging volume Cd concent of dust fall discharging distance of the smeltery and the cumulative effect of Cd, together with comparative analysis on the yearly monitoring values of Cd content in soil and dust fall which in the same site of the tested place. This experiment has lasted three integral climate periods. Under the statistical test of the results of yearly monitoring values in dust fall and soil and corresponding discharging volume of gas-Cd of the smeltery, the result has proved that the content of Cd in dust fall Cd pollution in soil and its cumulative rules has visible corelation with the discharging volume of Cd of smelting fume, and the influence distance of the soil which is on the subjacent wind direction of the smelting fume can reach beyond 10 km. 1fig. ,7tabs. ,12refs.