1
|
Wen T, Yang L, Dang C, Miki T, Bai H, Nagasaka T. Effect of basic oxygen furnace slag on succession of the bacterial community and immobilization of various metal ions in acidic contaminated mine soil. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:121784. [PMID: 31831284 DOI: 10.1016/j.jhazmat.2019.121784] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/26/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
As an immobilizing agent for metal ions, basic oxygen furnace slag may affect bacterial community succession, thus further promote metal ion immobilization in acidic contaminated soil. In this work, pot experiments were conducted to study the effects of adding 10 g/kg (S10) and 15 g/kg (S15) slag on soil properties, plant growth, bacterial community succession and various metal ion immobilization in acidic mine soils contaminated by Pb, Zn, Cu, Cr and Cd. The results showed that after 93 days of potting, the soil pH, electrical conductivity, total nitrogen and organic carbon content increased significantly (P < 0.05), and the dry weight of Poa pratensis L. increased significantly (P < 0.05) in S10 and S15 compared with in original soil group. With slag addition and plant growth, the diversity and richness indices of bacterial communities greatly improved, and at the genus level, the abundance of metal-tolerant bacteria and bacteria beneficial to plant growth increased, while the abundance of acidophiles decreased. After adding slag to the soil, the various metals were immobilized because slag could not only immobilize metal ions through ion exchange and coprecipitation, but also benefit plant growth and bacterial community succession which further promote the immobilization of metal ions.
Collapse
Affiliation(s)
- Tingting Wen
- School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing, 100083, PR China
| | - Liyun Yang
- School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing, 100083, PR China.
| | - Chenyuan Dang
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, PR China
| | - Takahiro Miki
- Department of Metallurgy, Graduate School of Engineering, Tohoku University, 02 Aoba-yama, Sendai, 980-8579, Japan
| | - Hao Bai
- School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing, 100083, PR China
| | - Tetsuya Nagasaka
- Department of Metallurgy, Graduate School of Engineering, Tohoku University, 02 Aoba-yama, Sendai, 980-8579, Japan
| |
Collapse
|
2
|
Xia M, Bao P, Zhang S, Liu A, Shen L, Yu R, Liu Y, Chen M, Li J, Wu X, Qiu G, Zeng W. Extraction and characterization of extracellular polymeric substances from a mixed fungal culture during the adaptation process with waste printed circuit boards. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:22137-22146. [PMID: 31209748 DOI: 10.1007/s11356-019-05234-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 04/22/2019] [Indexed: 06/09/2023]
Abstract
Extracellular polymeric substances (EPSs) extracted from fungal mycelium by four chemical methods (NaOH, H2SO4, formaldehyde-NaOH, glutaraldehyde-NaOH), three physical methods (heating, ultrasound, vibration), and a control method (centrifugation alone) were investigated. Results indicated formaldehyde-NaOH outperformed other methods with 186.6 ± 8.0 mg/g of polysaccharides and 23.2 ± 4.6 mg/g of protein extracted and ensured little contamination by intracellular substances. Thereafter, this method was applied in extracting EPS from a mixed fungal culture in the adaptation process with 0.5% (w/v) waste printed circuit boards (PCBs). With the four adaptation stages continuing, the culture tended to become more sensitive to respond to the external toxic environment characterized by secreting EPS more easily and quickly. The maximum amount of polysaccharides and protein could be achieved in only 3 days both at the 3rd and 4th adaptation stage. Three-dimensional excitation-emission matrix fluorescence spectrum indicated the peaks obtained for EPS were mainly associated to soluble microbial by-product-like and aromatic protein-like compounds. Transmission electron microscopic observation illustrated that although metal ions penetrated into hypha cells, parts of them could be absorbed by EPS, implying that EPS secretion may be a primary protective strategy adopted by the culture.
Collapse
Affiliation(s)
- Mingchen Xia
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Peng Bao
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Shishi Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Ajuan Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Runlan Yu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Yuandong Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Miao Chen
- CSIRO Process Science and Engineering, Clayton, Victoria, 3168, Australia
- Centre for Advanced Materials and Industrial Chemistry, RMIT University, Melbourne, 3000, Australia
| | - Jiaokun Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Xueling Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Guanzhou Qiu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Weimin Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China.
- CSIRO Process Science and Engineering, Clayton, Victoria, 3168, Australia.
| |
Collapse
|
3
|
Xia MC, Bao P, Liu AJ, Zhang SS, Peng TJ, Shen L, Yu RL, Wu XL, Li JK, Liu YD, Chen M, Qiu GZ, Zeng WM. Isolation and identification of Penicillium chrysogenum strain Y5 and its copper extraction characterization from waste printed circuit boards. J Biosci Bioeng 2018; 126:78-87. [PMID: 29573983 DOI: 10.1016/j.jbiosc.2018.02.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 01/20/2018] [Accepted: 02/01/2018] [Indexed: 12/22/2022]
Abstract
Biohydrometallurgy is generally considered as a green technology for the recycling of industrial solid waste. In this study, an indigenous fungal strain named Y5 with the ability of high-yielding organic acids was isolated and applied in bioleaching of waste printed circuit boards (PCBs). The strain Y5 was identified as Penicillium chrysogenum by morphological and molecular identification. Meanwhile, we investigated that an optimal set of culturing conditions for the fungal growth and acids secretion was 15 g/L glucose with initial pH 5.0, temperature 25°C and shaking speed 120 rpm in shaken flasks culture. Moreover, three bioleaching processes such as one-step, two-step and spent medium processes were conducted to extract copper from waste PCBs. Spent medium bioleaching showed higher copper extraction percentage and it was 47% under 5%(w/v) pulp density. Transmission electron microscope (TEM) observation combining with energy dispersive analysis of X-rays (EDAX) showed that the leached metal ions did not obviously damage the hypha cells. All above results indicated that P.chrysogenum strain Y5 has the tolerance to metal ions, suggesting its potential in recycling of metals from waste PCBs in industry.
Collapse
Affiliation(s)
- Ming-Chen Xia
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Peng Bao
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - A-Juan Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Shi-Shi Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Tang-Jian Peng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Run-Lan Yu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Xue-Ling Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Jiao-Kun Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Yuan-Dong Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Miao Chen
- CSIRO Process Science and Engineering, Clayton, Victoria 3168, Australia; Centre for Advanced Materials and Industrial Chemistry, RMIT University, Melbourne 3000, Australia
| | - Guan-Zhou Qiu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Wei-Min Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China; CSIRO Process Science and Engineering, Clayton, Victoria 3168, Australia.
| |
Collapse
|