零价铁-四钛酸钾晶须处理铀矿山废水

COMBINED TREATMENT OF URANIUM MINE WASTEWATER BY ZERO-VALENT IRON AND POTASSIUM TETRATITANATE WHISPER

以四钛酸钾晶须作为处理材料去除废水中的铀,考察了四钛酸钾晶须投加量、溶液pH值、铀初始质量浓度、反应时间和温度等因素对去除效果的影响。结果表明:在温度为25℃、pH=8.0、反应时间为120 min的条件下,四钛酸钾晶须对初始质量浓度为100 mg/L的含铀废水中铀去除率达97.4%。在此基础上开展零价铁和四钛酸钾晶须联合处理含铀废水研究,二者在实验所设的8种投加量情况下均可将初始铀浓度为100 mg/L的废水降至GB 23727—2009《铀矿冶辐射防护和环境保护规定》规定值0.05 mg/L以下。在增加投加量的基础上,二者联合处理,可使铀浓度约为50 mg/L的实际铀矿山废水中铀含量降至0.1 mg/L左右,去除率达99.8%。

Using potassium tetratitanate whisper （PTW） to remove the uranium in waste water, the effects of PTW dosage, initial solution pH, the initial U （ VI ） concentration, reaction time and temperature on the removal efficiency were investigated. Results showed that on the condition of reaction temperature 25℃ , pH = 8.0 and reaction time 120 min, the removal efficient of U（VI） was obtained to 97.4%. On the basis of this, zero-valent iron （Fe^0） and PTW were combined to treat uraniumcontaining wastewater, the concentrations of U （ VI ） in wastewater treated by 8 kinds of dosage of Fe^0 and PTW were all reduced to meet the national emission standards （ GB 23727--2009）. Adding the dosage of Fe^0 and PTW, the concentration of U（VI） in actual uranium mine wastewater could be decreased from 50 mg/L to 0. 1 mg/L, the removal rate was 99.8%.