The flocculation promotion of Na_2SiO_3 was studied in precipitationtreatment for simulated uranium mine water.
本文研究了硅酸钠在模拟铀矿坑水的石灰沉淀处理中的助凝作用。
2
After column chromatographic separation, re-crystallization treatment and supercritical fluid precipitationtreatment, the purity of lutein is improved.
粗提物经柱层析分离，重结晶，再经过超临界流体沉淀处理后，可提高叶黄素的纯度。
3
Major treatment methods for arsenic include sulfide precipitation, or complexation with polyvalent heavy metals.