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Nguyen TBH, Van HT, Dang VM, Ha Tran TN, Nguyen TT, Hoang TK. Insight into chromium adsorption from contaminated soil using Mg/Al LDH-zeolite. Heliyon 2024; 10:e31084. [PMID: 38803945 PMCID: PMC11128915 DOI: 10.1016/j.heliyon.2024.e31084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 05/04/2024] [Accepted: 05/09/2024] [Indexed: 05/29/2024] Open
Abstract
The study investigated the effectiveness of Mg/Al LDH-zeolite (MALZ) in immobilizing exchangeable Cr (e-Cr) within the soil. The research systematically evaluated various variables affecting the immobilization of e-Cr in contaminated soil (CS), including soil pH levels (ranging from 5.0 to 9.0), different weight ratios of MALZ (1 %, 3 %, and 5 %), durations of differing incubation periods (15, 30 and 45 days), and different SM content levels (30 %, 50 %, and 70 %). The initial concentration of Cr in the CS was maintained at 50 mg/kg. The investigation findings revealed that the optimal conditions for immobilizing the e-Cr were a soil pH of 5.0, an MALZ weight ratio of 3 %, an incubation period of 30 days, and an SM level of 70 %. Under these ideal conditions, the percentage of e-Cr within the CS decreased significantly, from 87.49 % (45.64 mg/kg) in the control treatment (CT) to just 19.82 % (10.08 mg/kg) when incubated with MALZ. The primary mechanisms responsible for immobilizing the e-Cr onto MALZ included pore filling, reduction processes, co-precipitation, organic interactions and electrostatic attractions leading to the formation of carbonate-bound complexes such as Cr(VI)-carbonate, Cr(III)-carbonate, and organic complexes. Surface functional groups on MALZ, housing iron and aluminium oxyhydroxides and silicon and oxygen elements, expedited these procedures. This study provided a valuable understanding of the mitigation of soils contaminated with chromium and contributed to understanding the relations between MALZ and the e-Cr in the soil. The discoveries carry substantial consequences for the advancement of efficient remediation technologies.
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Affiliation(s)
- Thị Bich Hanh Nguyen
- Faculty of Natural Resources and Environment, TNU - University of Sciences, Tan Thinh ward, Thai Nguyen City, 25000, Viet Nam
- Faculty of Environment, TNU - University Agriculture and Forestry (TUAF), Quyet thang Ward, Thai Nguyen City, 25000, Viet Nam
| | - Huu-Tap Van
- Center for Advanced Technology Development, Thai Nguyen University (TNU), Tan Thinh ward, Thai Nguyen City, 25000, Viet Nam
| | - Van Minh Dang
- Faculty of Environment, TNU - University Agriculture and Forestry (TUAF), Quyet thang Ward, Thai Nguyen City, 25000, Viet Nam
| | - Thi Ngoc Ha Tran
- Faculty of Natural Resources and Environment, TNU - University of Sciences, Tan Thinh ward, Thai Nguyen City, 25000, Viet Nam
| | - Thi Tuyet Nguyen
- Faculty of Natural Resources and Environment, TNU - University of Sciences, Tan Thinh ward, Thai Nguyen City, 25000, Viet Nam
| | - Trung Kien Hoang
- Faculty of Natural Resources and Environment, TNU - University of Sciences, Tan Thinh ward, Thai Nguyen City, 25000, Viet Nam
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Kibria KQ, Islam MA, Hoque S, Hossain MZ, Islam MA. Effect of Organic Amendments on Cadmium Bioavailability in Soil and its Accumulation in Rice Grain. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 110:74. [PMID: 37000244 DOI: 10.1007/s00128-023-03717-5] [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: 06/08/2022] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
A pot trial was conducted during the boro (dry) season to evaluate the impact of six traditional organic amendments (OAs) on the growth of SL-8 rice variety in both agricultural and cadmium (Cd) stressed soil at 2% and 4% application rates. Traditional OAs used in the study were cow dung, mustard oil cake (MOC), rice husk, saw dust, tea leaf and vermi compost (VC). Except for cow dung all other OAs were found to remove 99% of Cd from the aqueous solution, while cow dung removed 95%. Rice grain grown in OA-added soil in all application rates contained less Cd than the control. A 2% application rate was found to be more effective in reducing both Cd bioavailability and Cd in grain. OA application in soil significantly influenced soil pH in all cases. Though both bioavailable Cd in soil and grain Cd were reduced by the OA addition, the Cd uptake tendency of SL-8 rice variety markedly increased because of Cd spiking in soil.
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Affiliation(s)
| | - Md Azharul Islam
- Forestry and Wood Technology Discipline, Khulna University, Khulna, Bangladesh
| | - Sirajul Hoque
- Department of Soil, Water and Environment, University of Dhaka, Dhaka, 1000, Bangladesh
| | | | - Md Atikul Islam
- Environmental Science Discipline, Khulna University, Khulna, Bangladesh.
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Sun L, Zhang G, Li X, Zhang X, Hang W, Tang M, Gao Y. Effects of biochar on the transformation of cadmium fractions in alkaline soil. Heliyon 2023; 9:e12949. [PMID: 36820180 PMCID: PMC9938413 DOI: 10.1016/j.heliyon.2023.e12949] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/21/2022] [Accepted: 01/10/2023] [Indexed: 01/14/2023] Open
Abstract
To investigate the chemical properties in the biochar-mediated transformation of soil cadmium (Cd) fractions, the effects of biochar applied at different pyrolysis temperatures on soil Cd-fractions, pH value, and soil organic matter (SOM) were studied through an in-lab incubation experiment on contaminated soil. The results showed that the dissolved organic carbon (DOC) of CsBC300 (biochar prepared at 300 °C) was significantly higher (up to 1.31 times) than that of CsBC600 (biochar prepared at 600 °C). However, CsBC600 was more aromatic. Due to the difference in pyrolysis temperatures, the Cd deactivation mechanism of CsBC300 and CsBC600 was mainly to provide a large amount of organic matter and aromatic functional groups to the soil, respectively. The addition of these two biochar types significantly reduced the acid-extracted Cd content, by 76.56-83.52% and 70.48-76.81%, respectively. Contrastingly, it increased the residual Cd content by 2.26-2.36 and 2.08-2.29 times, respectively, which promoted the Cd transformation from the unstable to the stable state. However, CsBC300 had slightly better deactivation effect than CsBC600 on the 120th day, which was due to the decrease of soil pH and the increased SOM content. These study results can provide a theoretical reference for the remediation of Cd-contaminated alkaline soil.
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Affiliation(s)
- Lianglun Sun
- School of Life Sciences, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Guoquan Zhang
- Shandong Provincial Lunan Geology and Exploration Institute, Jining, Shandong, 272100, China
| | - Xinyu Li
- School of Life Sciences, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Xinyu Zhang
- School of Life Sciences, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Wei Hang
- School of Life Sciences, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Meizhen Tang
- School of Life Sciences, Qufu Normal University, Qufu, Shandong, 273165, China,Corresponding author.
| | - Yan Gao
- Shandong Provincial Lunan Geology and Exploration Institute, Jining, Shandong, 272100, China
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Zhang K, Yi Y, Fang Z. Remediation of cadmium or arsenic contaminated water and soil by modified biochar: A review. CHEMOSPHERE 2023; 311:136914. [PMID: 36272628 DOI: 10.1016/j.chemosphere.2022.136914] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 10/10/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
Biochar has a high specific surface area with abundant pore structure and functional groups, which has been widely used in remediation of cadmium or arsenic contaminated water and soil. However, the bottleneck problem of low-efficiency of pristine biochar in remediation of contaminated environments always occurs. Nowadays, the modification of biochar is a feasible way to enhance the performance of biochar. Based on the Web of science™, the research progress of modified biochar and its application in remediation of cadmium or arsenic contaminated water and soil have been systematically summarized in this paper. The main modification strategies of biochar were summarized, and the variation of physicochemical properties of biochar before and after modification were illustrated. The efficiency and key mechanisms of modified biochar for remediation of cadmium or arsenic contaminated water and soil were expounded in detail. Finally, some constructive suggestions were given for the future direction and challenges of modified biochar research.
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Affiliation(s)
- Kai Zhang
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Yunqiang Yi
- School of Environment, South China Normal University, Guangzhou, 510006, China; College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510006, China.
| | - Zhanqiang Fang
- School of Environment, South China Normal University, Guangzhou, 510006, China; SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., Qingyuan, 511500, China; Normal University Environmental Remediation Technology Co., Ltd, Qingyuan, 511500, China.
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5
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Bao Z, Shi C, Tu W, Li L, Li Q. Recent developments in modification of biochar and its application in soil pollution control and ecoregulation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 313:120184. [PMID: 36113644 DOI: 10.1016/j.envpol.2022.120184] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/24/2022] [Accepted: 09/10/2022] [Indexed: 06/15/2023]
Abstract
Soil pollution has become a real threat to mankind in the 21st century. On the one hand, soil pollution has reduced the world's arable land area, resulting in the contradiction between the world's population expansion and the shortage of arable land. On the other hand, soil pollution has seriously disrupted the soil ecological balance and significantly affected the biodiversity in the soil. Soil pollutants may further affect the survival, reproduction and health of humans and other organisms through the food chain. Several studies have suggested that biochar has the potential to act as a soil conditioner and to promote crop growth, and is widely used to remove environmental pollutants. Biochar modified by physical, chemical, and biological methods will affect the treatment efficiency of soil pollution, soil quality, soil ecology and interaction with organisms, especially with microorganisms. Therefore, in this review, we summarized several main biochar modification methods and the mechanisms of the modification and introduced the effects of the application of modified biochar to soil pollutant control, soil ecological regulation and soil nutrient regulation. We also introduced some case studies for the development of modified biochars suitable for different soil conditions, which plays a guiding role in the future development and application of modified biochar. In general, this review provides a reference for the green treatment of different soil pollutants by modified biochar and provides data support for the sustainable development of agriculture.
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Affiliation(s)
- Zhijie Bao
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China
| | - Chunzhen Shi
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Wenying Tu
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China
| | - Lijiao Li
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China
| | - Qiang Li
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China.
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Xing S, Yan Z, Song C, Tian H, Wang S. Limited Role of Rhamnolipids on Cadmium Resistance for an Endogenous-Secretion Bacterium. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:12555. [PMID: 36231857 PMCID: PMC9566264 DOI: 10.3390/ijerph191912555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Rhamnolipids, a type of biosurfactant, represent a potential strategy for both enhancing organismic resistance and in situ remediation of heavy metals contaminations. In-depth study of the mechanism of rhamnolipids synthesis in response to heavy metals stress, is indispensable for a wide use of biosurfactant-secreting microbes in bioremediation. In this study, we employed the wild-type and the rhlAB deficient strain (ΔrhlAB) of Pseudomonas aeruginosa, a prototypal rhamnolipids-producing soil microorganism, to investigate its responses to cadmium resistance based on its physicochemical, and physiological properties. Compared with the wild-type strain, the ΔrhlAB were more sensitive to Cd-stress at low Cd concentration (<50 mg/L), whereas there was little difference in sensitivity at higher Cd concentrations, as shown by spot titers and cell viability assays. Secreted rhamnolipids reduced intracellular Cd2+ accumulation to alleviate Cd2+ stress, whereas endogenous rhamnolipids played a limited role in alleviating Cd2+ stress. Synthesized rhamnolipids exhibited a higher critical micelle concentration (CMC) (674.1 mg/L) and lower emulsification index (4.7%) under high Cd-stress, while these parameters showed no obvious changes. High Cd-stress resulted in high hydrophilic wild-type bacterial surface and lower bioremediation ability. This study could advance a deeper understanding of the mechanism of cadmium resistance and provide a theoretical foundation for the application of biosurfactant and biosurfactant-secreted bacterium in contaminant bioremediation.
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Affiliation(s)
- Sufang Xing
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Zhen Yan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Chao Song
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Huifang Tian
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Shuguang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
- Sino-French Research Institute for Ecology and Environment (ISFREE), School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
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Zhu Y, Wang L, You Y, Cheng Y, Ma J, Chen F. Enhancing network complexity and function of soil bacteria by thiourea-modified biochar under cadmium stress in post-mining area. CHEMOSPHERE 2022; 302:134811. [PMID: 35504469 DOI: 10.1016/j.chemosphere.2022.134811] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/29/2022] [Accepted: 04/28/2022] [Indexed: 06/14/2023]
Abstract
Cadmium (Cd) pollution cause severe stress to soil microorganisms and biochar utilized for its ability to immobilize Cd in the soil effectively. However, the influence of biochar on the structure and function of the bacterial network under Cd stress is unclear. This research reports a pot experiment conducted to investigate the impact of 2.0% Italian poplar bark biochar (PB), 2.0% thiourea-modified biochar (TP), and control treatment (CK) on the complexity, stability and functional properties of the bacterial community under Cd stress. The results showed that: (1) Biochar increased the diversity of soil bacterial consortia under Cd stress (p < 0.05), and the diversity index demonstrated as order of CK < PB < TP; (2) Compared with CK network, the nodes number of PB and TP treatments networks were much higher, while the modularity and transitivity increased by 0.04% and 37.6%, 2.45% and 1.12%, respectively. The biochar amendment increased the stability and complexity of the network; (3) PICRUSt2 prediction results show that Xenobiotics biodegradation and metabolism membrane transport of TP treatment increased 62.52% and 53.62% compared with CK, respectively, which could be related to the decrease in Cd content according to principal component analysis. (4) The reduction of leaching Cd content caused network complexity and bacterial function changes by biochar amendment. TP amendment enhanced the complexity and stability of soil bacterial community under Cd stress, which will provide a scientific basis for in situ remediations of Cd-contaminated soils.
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Affiliation(s)
- Yanfeng Zhu
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou 221116, China; School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Liping Wang
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Yunnan You
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Yanjun Cheng
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Jing Ma
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou 221116, China; School of Public Administration, Hohai University, Nanjing 211110, China
| | - Fu Chen
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou 221116, China; School of Public Administration, Hohai University, Nanjing 211110, China.
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Efficient Remediation of Cadmium Contamination in Soil by Functionalized Biochar: Recent Advances, Challenges, and Future Prospects. Processes (Basel) 2022. [DOI: 10.3390/pr10081627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Heavy metal pollution in soil seriously harms human health and animal and plant growth. Among them, cadmium pollution is one of the most serious issues. As a promising remediation material for cadmium pollution in soil, functionalized biochar has attracted wide attention in the last decade. This paper summarizes the preparation technology of biochar, the existing forms of heavy metals in soil, the remediation mechanism of biochar for remediating cadmium contamination in soil, and the factors affecting the remediation process, and discusses the latest research advances of functionalized biochar for remediating cadmium contamination in soil. Finally, the challenges encountered by the implementation of biochar for remediating Cd contamination in soil are summarized, and the prospects in this field are highlighted for its expected industrial large-scale implementation.
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Zhu Y, Ge X, Wang L, You Y, Cheng Y, Ma J, Chen F. Biochar rebuilds the network complexity of rare and abundant microbial taxa in reclaimed soil of mining areas to cooperatively avert cadmium stress. Front Microbiol 2022; 13:972300. [PMID: 35983321 PMCID: PMC9378816 DOI: 10.3389/fmicb.2022.972300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 07/08/2022] [Indexed: 11/13/2022] Open
Abstract
Understanding the interactions between the soil microbial communities and species is critical in the remediation of heavy metal-contaminated soil. Biochar has been widely applied as a stabilizer in the in situ remediation of cadmium (Cd)-contaminated soils in mining areas. However, the rebuilding of the microbial taxa of rare and abundant species by biochar and their cooperative resistance to Cd stress remains elusive. In this pursuit, the present study envisaged the effects of two types of biochars viz., poplar bark biochar (PB) and thiourea-modified poplar bark biochar (TP) on the rare and abundant bacterial and fungal taxa by using pot experiments. The results demonstrated that the PB and TP treatments significantly reduced the leached Cd content, by 35.13 and 68.05%, respectively, compared with the control group (CK), in the reclaimed soil of the mining area. The application of biochar significantly improved the physicochemical properties like pH and Soil Organic Matter (SOM) of the soil. It was observed that TP treatment was superior to the PB and CK groups in increasing the diversity of the soil abundant and rare species of microbial taxa. Compared with the CK group, the application of PB and TP enhanced and elevated the complexity of the microbial networks of rare and abundant taxa, increased the number and types of network core microorganisms, reshaped the network core microorganisms and hubs, and boosted the microbial resistance to Cd stress. Our results indicate the response of rare and abundant microbial taxa to biochar application and the mechanism of their synergistic remediation of Cd-contaminated soil, thereby providing technical feasibility for in situ remediation of Cd-contaminated soil in mining areas.
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Affiliation(s)
- Yanfeng Zhu
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou, China
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
| | - Xiaoping Ge
- College of Hydrology and Water Resources, Hohai University, Nanjing, China
| | - Liping Wang
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
- Liping Wang,
| | - Yunnan You
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
| | - Yanjun Cheng
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
| | - Jing Ma
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou, China
- School of Public Administration, Hohai University, Nanjing, China
| | - Fu Chen
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou, China
- School of Public Administration, Hohai University, Nanjing, China
- *Correspondence: Fu Chen,
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Ghorbani M, Konvalina P, Neugschwandtner RW, Kopecký M, Amirahmadi E, Moudrý J, Menšík L. Preliminary Findings on Cadmium Bioaccumulation and Photosynthesis in Rice ( Oryza sativa L.) and Maize ( Zea mays L.) Using Biochar Made from C3- and C4-Originated Straw. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11111424. [PMID: 35684196 PMCID: PMC9183146 DOI: 10.3390/plants11111424] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/22/2022] [Accepted: 05/25/2022] [Indexed: 05/21/2023]
Abstract
Understanding the structural differences between feedstocks is critical for biochar effectiveness in plant growth. To examine the efficiency of biochars with unique physiological structures in a cadmium (Cd)-polluted soil, rice and maize as C3 and C4 plants, as well as biochar generated from their residues, defined as BC3 and BC4, were utilized. The experiment involved a control and a Cd-polluted soil (20 mg kg-1) without biochar application, and applications of each type of biochar (20 t ha-1) on Cd-polluted or unpolluted soil. In rice and maize fields, BC3 application led to the highest value of cation exchange capacity (CEC), with increases of 162% and 115%, respectively, over the control, while CEC increased by 110% and 71% with BC4 in the rice and maize field, respectively. As compared to the control, BC3 and BC4 dramatically enhanced the photosynthetic rate (Pn) of rice by 116% and 80%, respectively, and maize by 67% and 31%. BC3 and BC4 significantly decreased the Cd transfer coefficient in rice by 54% and 30% and in maize by 45% and 21%. Overall, BC3 is preferred over BC4 for establishing rice and maize in Cd-polluted soil, as it has a lower C/N ratio, a considerably higher surface area, and more notable alkaline features such as a higher CEC and nutrient storage.
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Affiliation(s)
- Mohammad Ghorbani
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia, Branišovská 1645/31A, 370 05 České Budějovice, Czech Republic; (P.K.); (M.K.); (E.A.); (J.M.J.)
- Correspondence:
| | - Petr Konvalina
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia, Branišovská 1645/31A, 370 05 České Budějovice, Czech Republic; (P.K.); (M.K.); (E.A.); (J.M.J.)
| | - Reinhard W. Neugschwandtner
- Department of Crop Sciences, Institute of Agronomy, University of Natural Resources and Life Sciences Vienna, Konrad-Lorenz-Straße 24, 3430 Tulln, Austria;
| | - Marek Kopecký
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia, Branišovská 1645/31A, 370 05 České Budějovice, Czech Republic; (P.K.); (M.K.); (E.A.); (J.M.J.)
| | - Elnaz Amirahmadi
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia, Branišovská 1645/31A, 370 05 České Budějovice, Czech Republic; (P.K.); (M.K.); (E.A.); (J.M.J.)
| | - Jan Moudrý
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia, Branišovská 1645/31A, 370 05 České Budějovice, Czech Republic; (P.K.); (M.K.); (E.A.); (J.M.J.)
| | - Ladislav Menšík
- Division of Crop Management Systems, Crop Research Institute, 161 06 Prague, Czech Republic;
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Effects of Modified Biochar on the Mobility and Speciation Distribution of Cadmium in Contaminated Soil. Processes (Basel) 2022. [DOI: 10.3390/pr10050818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Cadmium-contaminated soil poses a threat to the environment and human health. Biochar materials have received widespread attention as an in situ immobilizer for the efficient remediation of heavy-metal-contaminated soils. In this study, a modified biochar material (E–CBC) was developed for the immobilization of Cd in contaminated soil. E–CBC was characterized by XPS, SEM, BET, and FTIR. The effects of pristine biochar (BC) and E–CBC on soil physicochemical properties (pH and soil organic matter (SOM)), CaCl2-extractable Cd, total characteristics leaching procedure (TCLP) Cd, and speciation distribution of Cd were studied by incubation experiments. The results showed that the application of BC and E–CBC increased soil pH slightly and SOM significantly. A 2% dosage BC and E–CBC treatment reduced CaCl2-extractable Cd by 14.62% and 91.79%, and reduced TCLP Cd by 9.81% and 99.8%, respectively. E–CBC was shown to effectively induce the transition of Cd in the soil to a stable state. The application of a 0.25% dosage of E–CBC reduced the acid-extractable fraction of Cd from 58.06% to 10.66%. The functional groups increased after modification and may play an important role in the immobilization of Cd in the contaminated soil. In conclusion, E–CBC is a promising in situ immobilizer for the remediation of Cd-contaminated soil.
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Nadia C, Emna S, Anouar NM, Mariem L, Bilel M, Omar S, Aroud M, Dorra A, Abderazzek H. Investigation of environmental contamination by cadmium: Determination of the cadmium content in Nerium oleander and Acacia retinodes growing in industrial area. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2022. [DOI: 10.1016/j.toxac.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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