采用高温烧结资源化技术修复TNT红水污染土壤

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为筛选最佳治理技术以解决火炸药行业TNT红水污染土壤问题,研发了高温烧结资源化修复技术。将污染土壤与粘土按体积比(4∶6)混配后在隧道窑烘干段利用焙烧余热烘干26 h,再进入焙烧段焙烧24 h,烧结温度1100℃左右。隧道窑烟气经脱硫脱硝设施处理后由43 m排气筒排入大气。成品砖出窑后自然降温。土壤中的特征污染物-二硝基甲苯磺酸盐完全氧化分解,烧结烟气达标排放,资源化产品符合建材砖的质量标准且无特征污染物残留,满足土壤修复目标值(二硝基甲苯磺酸钠含量100 mg·kg-1)的要求。工
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