摘要
采用单因素实验分别考察了固液比、时间、温度、p H等因素对含铬污染土样中六价铬及总铬浸出效果的影响。结果表明,随着固液比的增大,六价铬的浸出率也相应增加,但固液比不宜超过1∶20;延长时间有利于六价铬的浸出,但浸出时间不宜超过13 h;一定的温度范围内,六价铬的浸出率随温度的升高而增加,但温度不宜超过60℃;在强酸性及强碱性条件下均有利于六价铬的浸出,与强碱性条件相比,强酸性条件更有利于六价铬的浸出,浸出率可以达到87%;总铬的浸出效果随这些因素的变化并不明显。
The influences of solid-liquid ratio,time,temperature,and p H etc. on the leaching effect of hexavalent chromium and total chromium in the chromium polluted soil samples were investigated by single factor test.The experimental results showed that with the increase of the solid-liquid ratio,the leaching rate of hexavalent chromium also increased accordingly,but the solid-liquid ratio should not exceed 1 ∶20;prolong the leaching time was good for the leaching rate of hexavalent chromium,but the leaching time should not exceed 13 h;raise the temperature in a certain range was also good for the leaching rate of hexavalent chromium,but temperature should not over 60 ℃;under the condition of strong acid and strong alkali,they were both conducive to hexavalent chromium leaching.Compared with the strong alkali,strong acid condition of hexavalent chromium leaching effect was better,and leaching rate can reach 87%;the total chromium′s leaching effect following the changes of these factors were not obvious.
出处
《无机盐工业》
CAS
北大核心
2016年第2期60-62,共3页
Inorganic Chemicals Industry
关键词
六价铬
总铬
浸出条件
hexavalent chromium
total chromium
leaching conditions
