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为评价厌氧消化污泥与菌渣对煤矸石特征污染物释放的原位控制效果,分别向煤矸石中添加厌氧消化污泥、菌渣、厌氧消化污泥与菌渣混合物,稳定、陈化30d后测定煤矸石浸出液pH、电导率(EC)、氧化还原电位(Eh)、总Fe、Fe~(2+)、SO_4~(2-)及煤矸石有效态Fe、Mn、Cu、Zn等指标进行控制效果研究。结果表明:(1)厌氧消化污泥、菌渣及其混合物的添加均能不同程度提高煤矸石浸出液pH。(2)厌氧消化污泥、菌渣及其混合物的添加均可不同程度降低煤矸石浸出液总Fe、Fe~(2+)、SO_4~(2-)及煤矸石有效态Fe,且厌氧消化污泥与菌渣混合组降低效果总体上最明显。(3)厌氧消化污泥、菌渣及其混合物对煤矸石中Mn、Zn、Cu释放的影响存在明显差别,其中厌氧消化污泥、厌氧消化污泥与菌渣混合组均增加煤矸石浸出液总Mn、总Zn及煤矸石有效态Mn、Zn;菌渣组、厌氧消化污泥与菌渣混合组均能有效降低煤矸石浸出液总Cu及煤矸石有效态Cu。
In order to evaluate the in situ control effect of anaerobic digestion sludge and bactericidal slag on the release characteristics of coal gangue pollutants, anaerobic digestion sludge, bacteria residue, anaerobic digestion sludge and bacteria residue mixture were added respectively to the gangue, stable, After aging for 30 days, the pH value, EC, Eh, total Fe, Fe ~ (2 +), SO_4 ~ (2-) and coal gangue effective Fe, Mn, Cu, Zn and other indicators for control effect. The results showed that: (1) The addition of anaerobic digestion sludge, bacteria residue and their mixtures could all improve the pH value of coal gangue leachate to different extent. (2) The addition of anaerobic digestion sludge, bacteria residue and their mixture can all reduce the Fe, Fe ~ (2 +), SO_4 ~ (2-) and coal gangue effective Fe, The effect of reducing the mixture of digestion sludge and bacteria residue is the most obvious. (3) The effects of anaerobic digestion sludge, bacteria residue and their mixtures on the release of Mn, Zn and Cu in coal gangue are obviously different. Among them, the anaerobic digestion sludge, anaerobic digestion sludge and bacteria residue mixed group increase coal The total Mn, total Zn and gangue effective Mn and Zn of the waste rock leachate, the mixture of the bacteria residue group, the anaerobic digestion sludge and the bacteria residue can effectively reduce the total Cu and gangue effective Cu in the coal gangue leachate.