絮凝沉淀法和离子交换法对比处理含钼地表水研究  

Comparison Research on Treatment of Molybdenum Contaminated Surface Water by Flocculation Precipitation and Ion Exchange Method

作　　者：赵可江 王俊[1] 崔俊峰[1] 段文杰[1] 黄做华[1] 黄伟庆[1] 田振邦[1] ZHAO Ke-jiang;WANG Jun;CUI Jun-feng;DUAN Wen-jie;HUANG Zuo-hua;HUANG Wei-qing;TIAN Zhen-bang(Henan Academy of Sciences the Institute of Chemistry Co.,Ltd.,Zhengzhou 450002,China)

机构地区：[1]河南省科学院化学研究所有限公司,郑州450002

出　　处：《有色金属（冶炼部分）》2021年第6期109-114,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：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)。

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FeCl_(3)用量为0.3mol/L时,钼去除率为97.66%,残余钼浓度2.61μg/L,pH=6.56,30min钼絮凝沉淀基本达到平衡,FeCl_(3)和NaOH消耗0.52元/m^(3)。对于离子交换法,当大孔阴离子交换树脂用量为6.0g/L时,钼去除率96.41%,残余钼浓度4.017μg/L;pH=4.0吸附容量最大,为qmax=36.50μg/g,pH=8.02时q=36.02μg/g,较最大吸附容量降低1.32%;吸附符合准二级动力学模型,100min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12~20BV/h流速柱处理103.2~105BV溶液,树脂柱床被穿透,当处理液在160.6~162.4BV时,树脂柱床饱和。NaOH消耗5.42元/m^(3)。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。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 FeCl_(3) is 0.3 mol/L,molybdenum removal rate is97.66%and residual Mo concentration is 2.61μg/L,pH=6.56.Flocculation precipitation reaches equilibrium within 30min.Cost of FeCl_(3) and NaOH is 0.52RMB/m^(3).As for ion exchange method,when addition of macroporous anion exchange resin is 6.0g/L in batch adsorption,molybdenum removal rate is96.41%and residual Mo concentration is 4.017μg/L.The maximum adsorption capacity is 36.50μg/g when pH=4.0,when pH=8.02,adsorption capacity is 36.02μg/g and 1.32%lower than that of the maximum.Adsorption data fit pseudo second order equation and reaches equilibrium within 100min.Regenerated by 7%NaOH,resin used in adsorption-regeneration cycle for 7times,its q/q0keeps between 96.48%-97.65%.In column adsorption,when feed velocity is 12-20BV/h,breakthrough volume is 103.2-105BV and saturated volume is 160.6-162.4BV.Cost of NaOH is 5.42 RMB/m^(3).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.

关 键 词：钼 地表水 絮凝沉淀 离子交换 动力学 再生 

分 类 号：X524[环境科学与工程—环境工程] TF841.2[冶金工程—有色金属冶金]