当前位置: X-MOL 学术J. Clean. Prod. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A novel process for the biological detoxification of non-metal residue from waste copper clad laminate treatment: From lab to pilot scale
Journal of Cleaner Production ( IF 11.1 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.jclepro.2020.120116
Wenbo Zhou , Yanzhi Chen , Haina Cheng , Xiaowen Liu , Zhuang Tian , Lijuan Zhang , Xin Kang , Yang Ge , Jing Peng , Jianxing Sun , Yong Wen , Wei Wang , Hongbo Zhou

A new process of biological detoxification and comprehensive utilization of non-metal residue from waste copper clad laminates treatment was proposed. The process mainly includes microbial cultivation, bioleaching, metal recovery, and wastewater treatment. The leaching rate of metal by bioleaching in acidic environment with pH1.0–2.0 was close to 100% and was 8.7% higher than that by dilute sulfuric acid leaching, and about 11.4% higher than that by circulating tailings leaching. Through a series of continuous batch operation, it was found that Eh (Oxidation/Reduction Potential), pH, c (Cu2+), c (TFe, total iron) of solutions in each section fluctuated within the expected range. Although the concentration of accumulated iron ions in the solution exceeds 20 g/L, the concentration of planktonic microorganisms was still above 6 × 107 cells/mL, and the activated microbial solution still had a good leaching effect on metals in the waste. The residue directly obtained through a filter press had a water content of less than 30%, while that dried residue has a copper content of less than 524 mg/kg. In addition, the grade of sponge copper prepared in the replacement section could reach 86.63%, and the direct yield of copper can reach more than 90%. Furthermore, an economic analysis mainly based on material balance had further confirmed the feasibility of the green treatment process.



中文翻译:

从废覆铜箔层压板处理中对非金属残留物进行生物解毒的新方法:从实验室到中试规模

提出了一种生物解毒新工艺,综合利用废铜箔层压板处理后的非金属残留物。该过程主要包括微生物培养,生物浸出,金属回收和废水处理。pH1.0-2.0的酸性环境中生物浸出的金属浸出率接近100%,比稀硫酸浸出的金属浸出率高8.7%,比循环尾矿浸出的金属浸出率高11.4%。通过一系列连续的分批操作,发现Eh(氧化/还原电位),pH,c(Cu 2+),每部分溶液的c(TFe,总铁)在预期范围内波动。尽管溶液中积累的铁离子浓度超过20 g / L,但浮游微生物的浓度仍高于6×10 7 细胞/ mL,并且活化的微生物溶液对废物中的金属仍然具有良好的浸出效果。通过压滤机直接获得的残留物的水分含量低于30%,而干燥的残留物的铜含量低于524 mg / kg。另外,置换段制备的海绵铜品位可达86.63%,铜的直接收率可达到90%以上。此外,主要基于材料平衡的经济分析进一步证实了绿色处理工艺的可行性。

更新日期:2020-01-13
down
wechat
bug