三维电极法去除配位电镀废水中的镍离子和铜离子

发布时间：2018-04-29 04:17

本文选题：三维电极 + 配位电镀废水　；参考：《电镀与环保》2017年06期

【摘要】：将颗粒状活性炭作为三维电极的粒子,采用三维电极法去除配位电镀废水中的镍离子和铜离子。考察了pH值、电流、极板间距、炭水比(粒子电极活性炭与处理水量的体积比)对镍离子和铜离子去除率的影响。在设定的范围内,镍离子和铜离子的去除率随pH值的升高呈现先升后降的变化趋势,随电流和炭水比的增大而升高,随极板间距的增大而降低。当废水中镍离子和铜离子的初始质量浓度分别为82.309 3mg/L和52.761 5mg/L、活性炭的体积为1 000mL、处理时间为2.0h时,最佳的处理工艺条件为:pH值4、电流0.6A,极板间距20cm,炭水比10∶9。此时,镍离子和铜离子的去除率分别为83.40%和86.20%。出水经过混凝沉淀后,镍离子和铜离子的去除率分别达到99.87%和99.68%,在出水中的质量浓度分别为0.107 2mg/L和0.169 3mg/L,出水水质达到《电镀污染物排放标准》(GB 21900—2008)中表2的排放限值。
[Abstract]:Granular activated carbon was used as particle of three dimensional electrode to remove nickel ion and copper ion from coordination electroplating wastewater. The effects of pH, current, plate spacing and the ratio of carbon to water (the volume ratio of activated carbon to treated water) on the removal efficiency of nickel and copper ions were investigated. The removal efficiency of nickel and copper ions increased firstly and then decreased with the increase of pH value, increased with the increase of current and the ratio of carbon to water, and decreased with the increase of plate spacing. When the initial mass concentration of nickel ion and copper ion is 82.309 3mg/L and 52.761 5 mg / L respectively, the volume of activated carbon is 1 000mL, and the treatment time is 2.0 h, the optimum treatment conditions are as follows: ph value 4, current 0.6 A, plate spacing 20 cm, ratio of carbon to water 10: 9. The removal rates of nickel ion and copper ion were 83.40% and 86.20% respectively. After coagulation and precipitation, the removal rates of nickel ion and copper ion reached 99.87% and 99.68%, respectively. The mass concentration in the effluent was 0.107 2mg/L and 0.169 3 mg / L, respectively. The effluent quality reached the discharge limit of Table 2 in the discharge Standard for Electroplating pollutants (GB21900-2008).
【作者单位】：江苏大学环境与安全工程学院;
【基金】：镇江市科技支撑计划(社会发展)SH2014014 江苏省博士后基金资助项目(1301064C)
【分类号】：X781.1

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