铝铁电极电絮凝法处理镀镉废水的研究
收稿日期: 2020-11-13
网络出版日期: 2021-08-11
基金资助
国家级专业教学资源库工业分析技术专业(GFZYK2016-14-10)
Study on the treatment of cadmiμm plating wastewater by electrocoagulation with Al-Fe electrode
Received date: 2020-11-13
Online published: 2021-08-11
为了探讨电絮凝法对钢铁厂镀镉废水的处理效果,先对铝铁电极活化预处理后,采用电絮凝法原理对镀镉废水中的镉离子去除净化。系统地分析了铝电极的极化效应,对影响絮凝体的平均粒径、含量、镉离子去除率的因素进行探讨。结果表明:最佳电解时间为70 min,此时絮凝体平均粒径为54 μm,含量为3.80 g/L。铝铁电极的阳极极化效应强于阴极极化效应。当起始pH=4.0、极板间距为20 mm、极板电压为5 V、电流密度为30 mA/cm2时,Cd2+初级去除率达到96.8%,三级去除率超过99.9%,废水中Cd2+含量达到国家现行电镀污染物排放标准。采用电絮凝法通过铝铁电极处理镀镉废水的实验效果优良。
张欣 , 张丽 . 铝铁电极电絮凝法处理镀镉废水的研究[J]. 无机盐工业, 2021 , 53(8) : 87 -90 . DOI: 10.19964/j.issn.1006-4990.2020-0614
In order to investigate the effect of electrocoagulation on the treatment of cadmium plating wastewater from iron and steel plant,the aluminum iron electrode was activated and pretreated,and then the principle of electrocoagulation was used to remove and purify cadmium ions in the wastewater.The polarization effect of aluminum electrode was systematically analyzed,and the factors affecting the average particle size,content and removal rate of cadmium ion were discussed.The results showed that the optimal electrolysis time was 70 min,and the average particle size of flocs was 54 μm and the content was 3.80 g/L.The anodic polarization effect of Al Fe electrode was stronger than the cathodic polarization effect.When the initial pH value was 4.0,the plate spacing was 20 mm,the plate voltage was 5 V,and the current density was 30 mA/cm2,the primary removal rate of Cd2+ reached 96.8%,and the tertiary removal rate exceeded 99.9%.The content of Cd2+ in wastewater reached the current national discharge standard of electroplating pollutants.The experimental results showed that the electrocoagulation method was effective in the treatment of cadmium plating wastewater by aluminum iron electrode.
[1] | 刘强, 林乃明, 沙春鹏, 等. 钢铁材料电镀镉的研究现状[J]. 表面技术, 2017, 46(1):146-157. |
[2] | 张厚. 电镀镉废水处理工艺研究[D]. 贵州: 贵州大学, 2019. |
[3] | 邹路易, 徐西腾, 李磊, 等. 聚二硫代氨基甲酸盐捕集剂处理含镉废水的研究[J]. 应用化工, 2015, 44(8):1383-1386. |
[4] | 韦刘勋. 锌铟冶炼企业镉废水污染及处理[J]. 科技风, 2018(4):102. |
[5] | 张汉鑫, 李慧, 梁精龙, 等. 有色冶炼废渣中有价金属回收的冶金方法应用之综述[J]. 中国钨业, 2018, 33(4):69-73. |
[6] | 张条兰, 刁润丽, 方秀苇. 电絮凝法处理电镀废水的研究进展[J]. 电镀与精饰, 2016, 38(3):33-37. |
[7] | 刘艳. 铝钛电极电絮凝法处理造纸废水工艺及机理的研究[D]. 陕西: 陕西科技大学, 2015. |
[8] | 温晓东, 杨盛春, 邓庆文, 等. 分离富集技术在紫外-可见分光光度法测定金属元素中的应用[J]. 大理大学学报, 2019, 12(4):36-43. |
[9] | 李影影. 铁板电絮凝法去除废水中PFOA、PFOS钾盐的研究[D]. 深圳: 深圳大学, 2015. |
[10] | 党亚攀. Fe-Al电极组合电絮凝法处理含Ni-EDTA废水的研究[D]. 广州: 华南理工大学, 2017. |
[11] | 孔令海, 刘家富, 杨春, 等. 芬顿氧化法处理氨羧配位剂电镀镉废水[J]. 电镀与涂饰, 2017, 36(12):651-654. |
[12] | 焦跃腾, 顾正华, 丁昊, 等. 板间距对电絮凝处理微污染水的影响[J]. 人民长江, 2017, 48(21):23-28. |
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