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投稿时间：2020-12-17 修订日期：2020-12-25 录用日期：2020-12-28 网络发布日期：2021-05-20
投稿时间：2020-12-17 修订日期：2020-12-25 录用日期：2020-12-28 网络发布日期：2021-05-20
中文摘要: 以含钼地表水为研究对象，对比了絮凝沉淀法和离子交换法深度处理效果、动力学和药剂消耗成本。对絮凝沉淀法，当FeCl3用量为0.3 mol/L时，钼去除率为97.66%，残余钼浓度2.61 μg/L，pH=6.56，30 min钼絮凝沉淀基本达到平衡，FeCl3和NaOH消耗0.52元/m3。对于离子交换法，当大孔阴离子交换树脂用量为6.0 g/L时，钼去除率96.41%，残余钼浓度4.017 μg/L；pH=4.0吸附容量最大，为qmax=36.50 μg/g，pH=8.02时q=36.02 μg/g，较最大吸附容量降低1.32%；吸附符合准二级动力学模型，100 min吸附基本达到平衡。以7%NaOH溶液按10︰1再生树脂，吸附—再生循环7次后，q/q0保持在96.48%~97.65%。按照12~20 BV/h流速柱处理103.2~105 BV溶液，树脂柱床被穿透，当处理液在160.6~162.4 BV时，树脂柱床饱和。NaOH消耗5.42元/m3。絮凝沉淀法在动力学和药剂成本方面优势较明显，该研究对含钼地表水深度处理和工艺设计具有指导意义。
Abstract:Aiming at treatment of molybdenum contaminated surface water, treatment effect, dynamics and agent consumption of flocculation precipitation and ion exchange method were compared. As for flocculation precipitation method, when dosage of FeCl3 is 0.3 mol/L, molybdenum removal rate is 97.66% and residual Mo concentration is 2.61 μg/L, pH=6.56. Flocculation precipitation reaches equilibrium within 30 min. Cost of FeCl3 and NaOH is 0.52 RMB/m3. As for ion exchange method, when addition of macroporous anion exchange resin is 6.0 g/L in batch adsorption, molybdenum removal rate is 96.41% and residual Mo concentration is 4.017 μg/L. The maximum adsorption capacity is 36.50 μg/g when pH=4.0, when pH=8.02, adsorption capacity is 36.02 μg/g and 1.32% lower than that of the maximum. Adsorption data fit pseudo second order equation and reaches equilibrium within 100 min. Regenerated by 7% NaOH, resin used in adsorption-regeneration cycle for 7 times, its q/q0 keeps between 96.48%-97.65%. In column adsorption, when feed velocity is 12-20 BV/h, breakthrough volume is 103.2-105 BV and saturated volume is 160.6-162.4 BV. Cost of NaOH is 5.42 RMB/m3. Flocculation precipitation method has advantage on kinetics and cost. This study has guiding significance for advanced treatment and process design of molybdenum contaminated surface water.
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基金项目:河南省科技重大专项（181100310100）；河南省科学院基本科研项目（200603058）；河南省科技开放合作项目（200903001）；河南省环境功能材料杰出外籍科学家工作室项目（GZS2018002）
引用文本：
赵可江,王俊,崔俊峰,段文杰,黄做华,黄伟庆,田振邦.絮凝沉淀法和离子交换法对比处理含钼地表水研究[J].有色金属（冶炼部分）,2021(6):109-114.
Zhao Ke-jiang,Wang Jun,Cui Jun-feng,Duan Wen-jie,Huang Zuo-hua,Huang Wei-qing,Tian Zhen-bang.Comparison Research on Treatment of Molybdenum Contaminated Surface Water by Flocculation Precipitation and Ion Exchange Method[J].Nonferrous Metals (Extractive Metallurgy),2021(6):109-114.
赵可江,王俊,崔俊峰,段文杰,黄做华,黄伟庆,田振邦.絮凝沉淀法和离子交换法对比处理含钼地表水研究[J].有色金属（冶炼部分）,2021(6):109-114.
Zhao Ke-jiang,Wang Jun,Cui Jun-feng,Duan Wen-jie,Huang Zuo-hua,Huang Wei-qing,Tian Zhen-bang.Comparison Research on Treatment of Molybdenum Contaminated Surface Water by Flocculation Precipitation and Ion Exchange Method[J].Nonferrous Metals (Extractive Metallurgy),2021(6):109-114.
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