电解-催化还原法回收化学镀镍废液中的镍
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摘要
采用电解-催化还原法回收化学镀镍废液中的镍。研究了硼氢化钠的体积分数、pH值、温度、电流密度及电解时间对Ni~(2+)回收率的影响。结果表明:在硼氢化钠40mL/L、pH值8、温度80℃、电流密度150A/m~2、电解时间60min的条件下,Ni~(2+)的回收率高达99.56%。回收后的化学镀镍残液经过离子交换树脂,可使残液中Ni~(2+)的质量浓度进一步降至0.1mg/L以下。
The recovery of nickel from electroless nickel plating wastewater by electrolysiscatalytic reduction method was studied.The influences of the volume fraction of sodium borohydride,pH value,temperature,current density and electrolysis time on the recovery rate of Ni~(2+) were also investigated.The results showed that under the conditions of sodium borohydride 40mL/L,pH value 8,temperature 80℃,current density 150 A/m~2 and electrolysis time 60min,the recovery rate of Ni~(2+) could be reached more than 99.56%.The mass concentration of Ni~(2+) in the recovered electroless nickel plating wastewater can be further reduced to less than 0.1mg/L through the ion exchange resin.
The recovery of nickel from electroless nickel plating wastewater by electrolysiscatalytic reduction method was studied.The influences of the volume fraction of sodium borohydride,pH value,temperature,current density and electrolysis time on the recovery rate of Ni~(2+) were also investigated.The results showed that under the conditions of sodium borohydride 40mL/L,pH value 8,temperature 80℃,current density 150 A/m~2 and electrolysis time 60min,the recovery rate of Ni~(2+) could be reached more than 99.56%.The mass concentration of Ni~(2+) in the recovered electroless nickel plating wastewater can be further reduced to less than 0.1mg/L through the ion exchange resin.
引文
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[2]闫雷,李淑芹,于秀娟.化学镀镍老化液的处理及资源回收利用[J].东北农业大学学报,2003,34(2):157-160.
[3]任志宏.重金属废水中含镍废水的处理[J].科技创新与生产力,2007(2):72-73.
[4]闫雷,于秀娟,李淑芹,等.电解法处理化学镀镍废液[J].沈阳建筑大学学报(自然科学版),2009,25(4):762-766.
[5]李荻.电化学原理(第3版)[M].北京:北京航空航天大学出版社,2008.
[6]赵立新,印博林,张宁,等.自催化还原法回收化学镀镍废液[J].电镀与精饰,2012,34(4):26-29.
[7]雷春英.电解法处理含镍废水及纯镍的回收[J].城市环境与城市生态,2009(3):17-20.
[8]王昊.化学镀镍废液的电化学处理技术的研究[D].大连:大连理工大学,2011.
[9]PICARD T,CATHALIFAUD-FEUILLADE G,MAZET M,et al.Cathodic dissolution in the electrocoagulation process using aluminium electrodes[J].Journal of environmental monitoring,2000,2(1):77-80.