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Wang Y, Cai Y, Wu Y, Yan C, Dang Z, Yin H. CaAl-Layered Double Hydroxides-Modified Biochar Composites Mitigate the Toxic Effects of Cu and Pb in Soil on Pea Seedlings. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2763. [PMID: 38894027 PMCID: PMC11173730 DOI: 10.3390/ma17112763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/19/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024]
Abstract
Compound contamination of soil with heavy metals copper (Cu) and lead (Pb) triggered by mining development has become a serious problem. To solve this problem, in this paper, corncob kernel, which is widely available and inexpensive, was used as the raw material of biochar and modified by loading CaAl-layered double hydroxides to synthesize biochar-loaded CaAl-layered double hydroxide composites (CaAl-LDH/BC). After soil remediation experiments, either BC or CaAl-LDH/BC can increase soil pH, and the available phosphorus content and available potassium content in soil. Compared with BC, CaAl-LDH/BC significantly reduced the available content of Cu and Pb in the active state (diethylenetriaminepentaacetic acid extractable state) in the soil, and the passivation rate of Cu and Pb by a 2% dosage of CaAl-LDH/BC reached 47.85% and 37.9%, respectively. CaAl-LDH/BC can significantly enhance the relative abundance of beneficial microorganisms such as Actinobacteriota, Gemmatimonadota, and Luteimonas in the soil, which can help to enhance the tolerance and reduce the enrichment ability of plants to heavy metals. In addition, it was demonstrated by pea seedling (Pisum sativum L.) growing experiments that CaAl-LDH/BC increased plant fresh weight, root length, plant height, catalase (CAT) activity, and protein content, which promoted the growth of the plant. Compared with BC, CaAl-LDH/BC significantly reduced the Cu and Pb contents in pea seedlings, in which the Cu and Pb contents in pea seedlings were reduced from 31.97 mg/kg and 74.40 mg/kg to 2.92 mg/kg and 6.67 mg/kg, respectively, after a 2% dosage of CaAl-LDH/BC, which was a reduction of 90.84% and 91.03%, respectively. In conclusion, compared with BC, CaAl-LDH/BC improved soil fertility and thus the plant growth environment, and also more effectively reduced the mobility of heavy metals Cu and Pb in the soil to reduce the enrichment of Cu and Pb by plants.
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Affiliation(s)
- Yuanzheng Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China (Y.W.)
| | - Yuhao Cai
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China (Y.W.)
| | - Yuxuan Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China (Y.W.)
| | - Caiya Yan
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China (Y.W.)
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China (Y.W.)
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China (Y.W.)
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, China
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Wu H, Liu L, Zhuo Y, Ellam RM, Yan K, Liu J, Tang J. Iron and silicon modified biochar for enhancing cadmium removal from water: Unveiling the crucial role of iron-induced silicon dissolution. BIORESOURCE TECHNOLOGY 2024; 401:130745. [PMID: 38677381 DOI: 10.1016/j.biortech.2024.130745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 04/29/2024]
Abstract
The interaction mechanisms of silicon (Si) and active ingredient iron (Fe) on cadmium (Cd) removal are still unknown. Herein, the Fe/Si modified biochar (Fe/Si-BC) was synthesized to enhance Cd removal by pre-immersion of Fe and ball milling loading of Si. Detailed characterizations indicated that Fe and Si were successfully introduced into Fe/Si-BC, resulting in the formation of a new metallic silicate (Ca2.87Fe0.13(SiO3)2). The maximum Cd adsorption capacity of Fe/Si-BC (31.66 mg g-1) was 3.6 times and 2.5 times higher than that of Fe-BC (8.89 mg g-1) and Si-BC (11.03 mg g-1), respectively, deriving from an enhancement of Si dissolution induced by Fe introduction. The dissolved Si could capture and combine Cd to form CdSiO3 precipitation, which was strongly supported by the random forest regression and correlation between dissolved Si content and Cd adsorption capacity. This study advances the mechanistic insights into synergistic functions of Si and Fe in Cd removal.
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Affiliation(s)
- Han Wu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Linan Liu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Hebei Engineering Research Center for Ecological Restoration of Seaward Rivers and Coastal Waters, Hebei University of Environmental Engineering, Hebei 066102, China.
| | - Yuguo Zhuo
- Hebei Engineering Research Center for Ecological Restoration of Seaward Rivers and Coastal Waters, Hebei University of Environmental Engineering, Hebei 066102, China
| | - Robert Mark Ellam
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Keshuo Yan
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Juncheng Liu
- Tianjin Huakan Environmental Protection Technology Co., Ltd, Tianjin 300170, China
| | - Jingchun Tang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
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Wang Y, Meng X, Wang S, Mo Y, Xu W, Liu Y, Shi W. Efficient adsorption of Cu 2+ and Cd 2+ from groundwater by MgO-modified sludge biochar in single and binary systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:9237-9250. [PMID: 38191722 DOI: 10.1007/s11356-023-31795-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 12/27/2023] [Indexed: 01/10/2024]
Abstract
In this study, MgO-modified sludge biochar (1MBC) prepared from sewage sludge was successfully used as an efficient adsorbent to remove heavy metals from groundwater. The adsorption performance and mechanism of 1MBC on Cu2+ and Cd2+ were investigated in single and binary systems, and the contribution of different mechanisms was quantified. Adsorption kinetics and isotherms analysis revealed that the adsorption processes of Cu2+ and Cd2+ by 1MBC followed the pseudo-second-order kinetic and Langmuir isotherm model in both systems, indicating that Cu2+ and Cd2+ were mainly controlled by chemisorption, and their theoretical maximum adsorption capacities were 240.36 and 219.06 mg·g-1, respectively. The results of the binary system showed that due to the competitive adsorption, the adsorption capacity of 1MBC for both heavy metals was lower than that of the single system, and the selective adsorption of Cu2+ was higher. The influencing variable experiments revealed that the adsorption of Cu2+ and Cd2+ by 1MBC had a wide pH adaption range and strong anti-interference ability to coexisting organics and ions. The adsorption mechanisms involved ion exchange (Cu: 47.39%, Cd: 53.17%), mineral precipitation (Cu: 35.31%, Cd: 24.18%), functional group complexation (Cu: 10.44%, Cd: 14.53%), and other possible mechanisms (Cu: 6.87%, Cd: 8.12%). Furthermore, 1MBC demonstrated excellent regeneration potential after five cycle times. Overall, the results have significant reference value for the practical application of removing heavy metals.
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Affiliation(s)
- Yan Wang
- College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
- Postdoctoral Innovation Practice Base of Jiangsu Province, Suzhou Institute of Environmental Science, Suzhou, 215009, China
| | - Xianrong Meng
- Postdoctoral Innovation Practice Base of Jiangsu Province, Suzhou Institute of Environmental Science, Suzhou, 215009, China
| | - Shanhu Wang
- College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
- Postdoctoral Innovation Practice Base of Jiangsu Province, Suzhou Institute of Environmental Science, Suzhou, 215009, China
| | - Yuanye Mo
- College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
- Postdoctoral Innovation Practice Base of Jiangsu Province, Suzhou Institute of Environmental Science, Suzhou, 215009, China
| | - Wei Xu
- Postdoctoral Innovation Practice Base of Jiangsu Province, Suzhou Institute of Environmental Science, Suzhou, 215009, China
| | - Yang Liu
- Suzhou Yifante Environmental Remediation Co. Ltd., Suzhou, 215100, China
| | - Weilin Shi
- College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
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Wang K, Yao R, Zhang D, Peng N, Zhao P, Zhong Y, Zhou H, Huang J, Liu C. Tetracycline Adsorption Performance and Mechanism Using Calcium Hydroxide-Modified Biochars. TOXICS 2023; 11:841. [PMID: 37888692 PMCID: PMC10611203 DOI: 10.3390/toxics11100841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 09/21/2023] [Accepted: 09/28/2023] [Indexed: 10/28/2023]
Abstract
Tetracycline is frequently found in various environments and poses significant ecological risks. Calcium hydroxide-modified biochar has shown potential as a material for removing multiple classes of pollutants from wastewater streams. The tetracycline-adsorption performance and mechanism of alkali-modified biochars derived from nine wastes (corn straw, rice straw, swine manure, cypress powder, wheat straw, peanut shell, walnut shell powder, soybean straw, and corncobs) were investigated in the study. Among the four alkalis tested, calcium hydroxide exhibited the most effective modification effects at a pyrolysis temperature of 500 °C. Straw biomass was most suitable to be modified by calcium hydroxide, and calcium hydroxide-modified biochar showed the highest adsorption performance for tetracycline. The maximum adsorption capacities were 8.22 mg g-1 for pristine corn straw biochar and 93.46 mg g-1 for calcium hydroxide-modified corn straw biochar. The tetracycline adsorption mechanism by calcium hydroxide-modified corn straw biochar involved hydrogen bonding, oxygen-containing functional groups, Ca2+ metal complexation, and electrostatic attraction. Consequently, calcium hydroxide-modified corn straw biochar emerges as an environment-friendly, cost-effective, and efficient tetracycline adsorbent.
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Affiliation(s)
- Kaifeng Wang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Runlin Yao
- Bathurst Future Agri-Tech Institute, Qingdao Agricultural University, Qingdao 266109, China
| | - Dongqing Zhang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Na Peng
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Ping Zhao
- Geological Party 105, Guizhou Provincial Bureau of Geology and Mineral Exploration and Development, Guiyang 550018, China
| | - Yongming Zhong
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Haijun Zhou
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Jiahui Huang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Chen Liu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
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Gao Z, Shan D, He J, Huang T, Mao Y, Tan H, Shi H, Li T, Xie T. Effects and mechanism on cadmium adsorption removal by CaCl 2-modified biochar from selenium-rich straw. BIORESOURCE TECHNOLOGY 2023; 370:128563. [PMID: 36592869 DOI: 10.1016/j.biortech.2022.128563] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 06/17/2023]
Abstract
As every-one knows, cadmium contamination poses a significant and permanent threat to people and aquatic life. Therefore, research on how to remove cadmium from wastewater is essential to protect the natural environment. In this study, agricultural and forestry waste straw sprayed with selenium-enriched foliar fertilizer was prepared as biochar, which was altered by calcium chloride (CaCl2) to remove Cd2+ from water. The outcomes demonstrated that biochar generated by pyrolysis at 700 °C (BC700) had the best adsorption effect. Secondly, pseudo-second-order kinetics and Langmuir adsorption models were used to predict the Cd2+ adsorption. Finally, electrostatic adsorption, ion exchange, and complexation of oxygen functional groups (OFGs) were demonstratedto be the main adsorption mechanisms. These conclusions indicate that selenium-rich straw biochar is a novel adsorbent for agroforestry waste recovery. Meanwhile, this work will offer a promising strategy for the overall utilization of rice straw.
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Affiliation(s)
- Zongyu Gao
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir (Chongqing Three Gorges University), Wan Zhou 404100, China; Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Dexin Shan
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China.
| | - Jiahong He
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Tao Huang
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Yuan Mao
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Haiping Tan
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Huiting Shi
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir (Chongqing Three Gorges University), Wan Zhou 404100, China; Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Tingzhen Li
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir (Chongqing Three Gorges University), Wan Zhou 404100, China
| | - Taiping Xie
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China; School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
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