微波强化嗜酸氧化硫硫杆菌浸出废线路板中铜的条件优化  

Optimization of enhanced leaching copper with Acidithiobacillus thiooxidans from waste printed circuit boards using microwave

作　　者：刘倩[1] 李如燕 李翔 马长文[1] 田震[1] 刘雯雯 LIU Qian;LI Ruyan;LI Xiang;MA Changwen;TIAN Zhen;LIU Wenwen(College of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学资源与环境工程学院,上海201209

出　　处：《生物学杂志》2024年第3期40-45,共6页Journal of Biology

基　　金：中国博士后科学基金项目(2019M653844XB);上海市高原学科-环境科学与工程(资源循环科学与工程)资助;上海第二工业大学校级特色项目(EGD22DS11)。

摘　　要：为提高电子废弃物中金属铜的生物浸出率,用微波强化嗜酸氧化硫硫杆菌(Aidithiobacillus thiooxidan)对废线路板中铜的浸出,采用Plackett-Burman法和Box-Behnken法优化强化浸出条件。Plackett-Burman法表明微波功率、辐照时间和浸出时间能够显著影响废线路板中铜的生物浸出率。最陡爬坡实验确定3因素的中心值为微波功率340 W、辐照时间3.60 min和浸出时间6.80 d。采用Box-Behnken法优化浸铜条件。研究发现,微波功率、浸出时间、微波功率和浸出时间及辐照时间和浸出时间的交互作用对浸铜有显著影响,辐照时间有影响但不显著。模型预测最优条件为微波功率336.10 W、辐照时间3.59 min和浸出时间6.82 d,预测最优浸出率为75.69%。调整微波强化废线路板中铜的生物浸出条件为微波功率336 W、辐照时间3.60 min和浸出时间6.80 d,实际铜浸出率为75.41%±0.76%,与模型预测结果相近。表明所得最优条件真实有效,可用于后续研究。In order to improve the leaching copper efficiency,microwave was used to enhance the leaching system of A.thiooxidans.Plackett-Burman and Box-Behnken methods were used to optimize the enhanced bioleaching condition.Firstly,the significant factors identified by Plackett-Burman method were microwave power,irradiation time and leaching time.Secondly,the central values of above-mentioned three factors of Box-Behnken test were identified by the steepest ascent experiment,which were microwave power of 340 W,irradiation time of 3.60 min and leaching time of 6.80 d.And then,the experimental conditions of bioleaching copper with A.thiooxidans were optimized using Box-Behnken method.The research showed that the microwave power,leaching time,the interactions of microwave power and leaching time plus irradiation time and leaching time had the significant influence on the bioleaching copper,whereas the effect of irradiation time was not significant.The optimal experimental condition predicted by model was as follows:mi-crowave power 336.10 W,irradiation time 3.59 min and leaching time 6.82 d,and the predicted optimal value was 75.69%.The adjus-ted optimal condition was microwave power 336 W,irradiation time 3.60 min and leaching time 6.80 d,the experimental value was 75.41%±0.76%,indicating a high agreement between the predicted and experimental values.

关 键 词：微波强化 嗜酸氧化硫硫杆菌 废线路板 铜浸出 优化 

分 类 号：TF18[冶金工程—冶金物理化学] Q93[生物学—微生物学]