Antimony （Sb） has received increasing environmental concerns due to its potential toxic and carcinogenic properties. In the present work, the electrocoagulation technique was used to treat the flotation wastewater f...Antimony （Sb） has received increasing environmental concerns due to its potential toxic and carcinogenic properties. In the present work, the electrocoagulation technique was used to treat the flotation wastewater from a heavy antimony polluted area, and the mechanism of removing Sb was also investigated. The study focused on the effect of operation parameters such as current density, initial pH and standing time on the Sb removal efficiency. Antimony concentration of below 1 mg/L in the treated wastewater was achieved, which meets the emission standards established by State Department of Environmental Protection and State Administration of China for Quality Supervision and Inspection and Quarantine of China.展开更多
基金supported by the Innovative Program of the Chinese Academy of Sciences (No. kzcx2-yw-102)the National Nature Science Foundation of China (No. 40525011, 40632011)
文摘Antimony （Sb） has received increasing environmental concerns due to its potential toxic and carcinogenic properties. In the present work, the electrocoagulation technique was used to treat the flotation wastewater from a heavy antimony polluted area, and the mechanism of removing Sb was also investigated. The study focused on the effect of operation parameters such as current density, initial pH and standing time on the Sb removal efficiency. Antimony concentration of below 1 mg/L in the treated wastewater was achieved, which meets the emission standards established by State Department of Environmental Protection and State Administration of China for Quality Supervision and Inspection and Quarantine of China.
文摘研究了斑铜矿的浮选行为,并通过吸附量测试、红外光谱、吸附动力学及热力学计算研究丁基钠黄药(简称Na BX)在斑铜矿表面的吸附机理.斑铜矿在pH为5～9时可浮性较好,药剂在矿物表面的吸附属Freundlich模型的多分子层吸附;当pH为12时可浮性差,属于Lamgmuir模型的单分层吸附. Na BX在矿物表面吸附符合二阶动力学方程,是自发进行的化学吸附过程,通过热力学计算得出pH为9时的吸附反应比pH为12时更容易发生.红外光谱测试表明,当pH为5～9时Na BX在斑铜矿表面的吸附产物为Cu(BX)_2,Fe(BX)_3和(BX)_2,而当pH为12时的吸附产物为Cu(BX)_2.
