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Kuang X, Hu Y, Chen S, Ge Y, Hu Y, Song H, Song K, Peng L. Ecological responses and functional significance of paddy crust in the southern Chinese environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 349:123908. [PMID: 38570157 DOI: 10.1016/j.envpol.2024.123908] [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: 11/27/2023] [Revised: 03/24/2024] [Accepted: 03/29/2024] [Indexed: 04/05/2024]
Abstract
Paddy Crusts (PC) play a pivotal role in the migration and transformation of heavy metals within paddy ecosystems, situated at the critical intersection of air, water, and soil. This study focused on PC samples from heavy metal-contaminated rice paddies in six southern Chinese provinces. It's the first time we've screened and quantified the impact of nutrition, physicochemical properties, and heavy metals on bacterial diversity in PC. Our results highlight the significant influence of zinc, total nitrogen, and soil manganese on bacterial diversity. Using structural equation models, we identified the pathways through which these three types of environmental factors shape bacterial diversity. Heavy metal indicators and physical and chemical indicators exerted a direct negative effect on bacterial diversity in PC, while nutritional indicators had a direct and significant positive effect on bacterial diversity. Variance partitioning analysis revealed heavy metals had the most significant impact, accounting for 7.77% of the total effect. Moreover, the influence of heavy metals on bacterial diversity increased as diversity decreased, ranging from 3.81% to 42.09%. To remediate specific heavy metal pollution, our proposed method involves cultivating indigenous bacteria by controlling these environmental factors, based on an analysis of the interplay among bacterial diversity, environmental variables, and heavy metal bioconcentration factors. These findings enhance our understanding of PC and provide insights into rice field heavy metal pollution mitigation.
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Affiliation(s)
- Xiaolin Kuang
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China
| | - Yiyi Hu
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China
| | - Shaoning Chen
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China
| | - Yili Ge
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China
| | - Yiling Hu
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China
| | - Huijuan Song
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China
| | - Ke Song
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China
| | - Liang Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha, 410128, China.
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2
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Kuang X, Hu Y, Peng L, Dan Li, Song H, Song K, Li C, Wang Y, He S. Application of biological soil crusts for efficient cadmium removal from acidic mine wastewater. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133524. [PMID: 38232555 DOI: 10.1016/j.jhazmat.2024.133524] [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: 09/19/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/19/2024]
Abstract
Utilizing an acid-resistant biological soil crust (BSC) species that we discovered, we developed a device capable of efficiently removing cadmium (Cd) from mine wastewater with varying levels of acidity. Our research has demonstrated that this particular BSC species adapts to acidic environments by regulating the balance of fatty acids and acid-resistant enzymes. At a Cd concentration of 5 mg/L, the BSC grew well. When the initial Cd concentration was 2 mg/L, and the flow rate was set at 1 mL/min (at pH levels of 3, 4, and 5), BSC had a high removal rate of Cd, and the removal rate increased with the increase of pH (from 90% to 97%). Chemisorption is the primary removal mechanism in the initial stage, where the functional groups and minerals on the surface of the BSC play a significant role. In addition, BSC also adapts to Cd stress by changing bacterial community structure. It was discovered through infrared spectroscopy and two-dimensional correlation analysis that hydrophilic groups, specifically phosphate and carboxyl groups, exhibited the highest reactivity during the Cd binding process. Protein secondary structure analysis confirmed that as the pH increased, the adsorption capacity of the BSC increased; making biofilm formation easier. This study presents a novel approach for the treatment of acidic wastewater.
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Affiliation(s)
- Xiaolin Kuang
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Yiling Hu
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Liang Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China.
| | - Dan Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Huijuan Song
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Ke Song
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Changwu Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Yuanlong Wang
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Shilong He
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
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Peng L, Li D, Song H, Kuang X, Zeng Q, Ao H. The dissolution characteristics of cadmium containing birnessite produced from paddy crusts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:169811. [PMID: 38211864 DOI: 10.1016/j.scitotenv.2023.169811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/27/2023] [Accepted: 12/29/2023] [Indexed: 01/13/2024]
Abstract
The cadmium (Cd) accumulates in birnessite as it forms on the surface of paddy crusts (PC). The stability of Cd-containing birnessite is influenced by environmental factors, and destabilized birnessite releases dissolved Cd. We report the effects of pH, oxalic acid, and light on the dissolution of Cd-containing birnessite. We found that at pH 4.0, with light and 0.20 mol/L oxalic acid, the ratio of dissolved Cd and manganese (Mn) peaked after 24 h at 2978.0 μg/g and 326.8 mg/g, respectively. The three environmental factors affected the dissolution of Cd-containing birnessite in the following order: pH > oxalic acid > light. During dissolution process, Cd and Mn did not dissolve simultaneously, and the dissolved Cd/Mn ratio in the solution was significantly lower than that of the pristine mineral (33.5 × 10-3). Compared with Mn, Cd dissolution was inhibited by strong acidity (pH 4.0-5.0), and the dissolved Cd/Mn ratio was 5-10 × 10-3. Mild acidity (pH 6.0) was weakly inhibitory, with a Cd/Mn ratio of 6-15 × 10-3. In an alkaline (pH 8.0) oxalate environment, light illumination inhibited Cd dissolution, and the Cd/Mn ratio decreased over time due to the stability of the products formed by oxalate and carbonate, with Cd being more stable than those formed by Mn. Our findings would provide insights into the migration and transformation of PC-associated Cd in paddy fields.
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Affiliation(s)
- Liang Peng
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China.
| | - Dan Li
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Huijuan Song
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Xiaolin Kuang
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Qingru Zeng
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Hejun Ao
- College of Agronomy, Hunan Agricultural University, Changsha 410128, PR China.
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Xu L, Wang G, Zhang S, Li T, Xu X, Gong G, Zhou W, Pu Y, Jia Y, Li Y, Long L. Inhibition of high sulfur on functional microorganisms and genes in slightly contaminated soil by cadmium and chromium. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123421. [PMID: 38253166 DOI: 10.1016/j.envpol.2024.123421] [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: 09/12/2023] [Revised: 11/21/2023] [Accepted: 01/19/2024] [Indexed: 01/24/2024]
Abstract
It is generally accepted that sulfur can passivate the bioavailability of heavy metals in soil, but it is not clear whether high sulfur in cadmium (Cd) and chromium (Cr) contaminated soil has negative effect on soil microbial community and ecological function. In this study, total sulfur (TS) inhibited the Chao 1, Shannon, Phylogenetic diversity (Pd) of bacterial and Pd of fungi in slightly contaminated soil by Cd and Cr around pyrite. TS, total potassium, pH, total chromium, total cadmium, total nitrogen, soil organic matter were the predominant factors for soil microbial community; the contribution of TS in shaping bacterial and fungal communities ranked at first and fifth, respectively. Compared with the low sulfur group, the abundance of sulfur sensitive microorganisms Gemmatimonas, Pseudolabrys, MND1, and Schizothecium were decreased by 68.79-97.22% (p < 0.01) at high sulfur one; the carbon fixation, nitrogen cycling, phosphorus cycling and resistance genes abundance were significantly lower (p < 0.01) at the latter. Such variations were strongly and closely correlated to the suppression of energy metabolism (M00009, M00011, M00086) and carbon fixation (M00173, M00376) functional module genes abundance in the high sulfur group. Collectively, high sulfur significantly suppressed the abundances of functional microorganisms and functional genes in slightly contaminated soil with Cd and Cr, possibly through inhibition of energy metabolism and carbon fixation of functional microorganisms. This study provided new insights into the environmental behavior of sulfur in slightly contaminated soil with Cd and Cr.
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Affiliation(s)
- Longfei Xu
- College of Environmental Sciences, Sichuan Agricultural University, Wenjiang, 611130, China.
| | - Guiyin Wang
- College of Environmental Sciences, Sichuan Agricultural University, Wenjiang, 611130, China; Sichuan Provincial Key Laboratory of Soil Environmental Protection, Wenjiang, 611130, China
| | - Shirong Zhang
- College of Environmental Sciences, Sichuan Agricultural University, Wenjiang, 611130, China; Sichuan Provincial Key Laboratory of Soil Environmental Protection, Wenjiang, 611130, China.
| | - Ting Li
- College of Resources, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Xiaoxun Xu
- College of Environmental Sciences, Sichuan Agricultural University, Wenjiang, 611130, China; Sichuan Provincial Key Laboratory of Soil Environmental Protection, Wenjiang, 611130, China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Wei Zhou
- College of Resources, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Yulin Pu
- College of Resources, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Yongxia Jia
- College of Resources, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Yun Li
- College of Resources, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Lulu Long
- College of Environmental Sciences, Sichuan Agricultural University, Wenjiang, 611130, China
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He N, Hu L, Jiang C, Liu Y, Zhao H. Effect of Phanerochaete chrysosporium induced phosphate precipitation on bacterial diversity during the soil remediation process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:13523-13534. [PMID: 38253835 DOI: 10.1007/s11356-024-31993-z] [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: 07/10/2023] [Accepted: 01/09/2024] [Indexed: 01/24/2024]
Abstract
Biomineralization by phosphate minerals and phosphate solubilizing fungi (PSF) has attracted great interest as a novel remediation method for heavy metal(loid) co-contaminated soil. It was very essential to investigate the microenvironment response with the application of amendments. In this study, three grain sizes of hydroxyapatites (HAP) and Phanerochaete chrysosporium (P. chrysosporium) were used to investigate the change in heavy metal(loid) fractions, soil physicochemical properties, and bacterial community during the remediation of Mangchang and Dabaoshan acidic mine soils. The results showed that the residual fractions in the two soils increased significantly after 35 days of remediation, especially that of As and Zn in Dabaoshan soils were presented at over 87%. In addition, soil pH, organic matter (OM), and available phosphorous (AP) were almost improved. 16S rRNA sequencing analysis indicated that the introduction of culture medium and P. chrysosporium alone changed bacterial abundance, but the addition of HAP changed the bacterial diversity and community composition by altering environmental conditions. The amendments in the research showed good performance on immobilizing heavy metal(loid)s and reducing their bioavailability. Moreover, the research suggested that environmental factors and soil inherent properties could influence the microbial community structure and composition.
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Affiliation(s)
- Ni He
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Liang Hu
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.
| | - Chunyangzi Jiang
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Yayuan Liu
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Hongbo Zhao
- Key Laboratory of Biohydrometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
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Mao Q, Xie X, Pinzon-Nuñez DA, Xie Z, Liu T, Irshad S. Native microalgae and Bacillus XZM remediate arsenic-contaminated soil by forming biological soil crusts. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118858. [PMID: 37647731 DOI: 10.1016/j.jenvman.2023.118858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/09/2023] [Accepted: 08/20/2023] [Indexed: 09/01/2023]
Abstract
Biological soil crusts (BSCs) are a useful tool for immobilization of metal(loid)s in mining areas. Yet, the typical functional microorganisms involved in promoting the fast development of BSCs and their impacts on arsenic(As) contaminated soil remain unverified. In this study, As-contaminated soil was inoculated with indigenous Chlorella thermophila SM01 (C. thermophila SM01), Leptolyngbya sp. XZMQ, isolated from BSCs in high As-contaminated areas and plant growth-promoting (PGP) bacteria (Bacillus XZM) to construct BSCs in different manners. After 45 days of ex-situ culture experiment, Leptolyngbya sp. XZMQ and bacteria could form obvious BSCs. Compared to single-inoculated microalgae, the co-inoculation of Leptolyngbya sp. XZMQ and Bacillus XZM increased soil pH and water content by 10% and 26%, respectively, while decreasing soil EC and density by 19% and 14%, respectively. The soil catalase, alkaline phosphatase, sucrase, and urease activities were also increased by 30.53%, 96.24%, 154.19%, and 272.17%, respectively. The co-inoculation of Leptolyngbya sp. XZMQ and Bacillus XZM drove the formation of BSCs by producing large amounts of extracellular polymeric substances (EPS). The three-dimensional fluorescence spectroscopy (3D-EEM) analysis showed that induced BSCs increased As immobilization by enhancing the contents of tryptophan and tyrosine substances, fulvic acid, and humic acid in EPS. The presence of the -NH2 and -COOH functional groups in tryptophan residues were determined using Fourier Transform Infrared Spectroscopy (FTIR). X-Ray Diffraction (XRD) analysis showed that there were iron (hydrogen) oxides in BSCs, which could form ternary complexes with humic acid and As, thereby increasing the adsorption of As. Therefore, BSCs formed by co-inoculation of Leptolyngbya sp. XZMQ and Bacillus XZM increased the immobilization of As, thereby reducing the content of soluble As in the environment. In summary, our findings innovatively provided a new method for the remediation of As-contaminated soil in mining areas.
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Affiliation(s)
- Qing Mao
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Xi Xie
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China
| | | | - Zuoming Xie
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China.
| | - Taikun Liu
- Linyi Vocational University of Science and Technology, Linyi, 276000, China
| | - Sana Irshad
- Institute for Advanced Study, Shenzhen University, Shenzhen, 51806, China
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Gan CD, Yang JY, Du XY, Li JL, Tang QX, Nikitin A. Vanadium mobilization and redistribution during mineral transformation of vanadium-titanium magnetite tailings with different weathering degrees. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 894:165068. [PMID: 37355119 DOI: 10.1016/j.scitotenv.2023.165068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/15/2023] [Accepted: 06/20/2023] [Indexed: 06/26/2023]
Abstract
Due to the long-term open stockpile, the release of vanadium (V) from V-containing tailings will cause continuous V pollution in the mining area. Previous studies on the concentration and speciation of V primarily focused on surface tailings at a regional scale. However, the mobilization and redistribution of V within the tailing profile during the mineral transformation of tailings remain unclear. Herein, a series of concentrations of V(V) (0-200 mg L-1) solutions were added to the vanadium‑titanium magnetite tailings at different depths separately to simulate the redistribution of dissolved V released from tailings in the solid phase of tailings. During the 56-day incubation, the concentrations of aqueous V in the surface tailings were significantly lower than those in the deep tailings under the same level of V(V) treatment, indicating that the shallow tailings had a stronger immobilization capacity for V than the deep tailings. Morphological analysis and color overlays of the elements demonstrated that most of V was immobilized into the tailings and adsorbed or precipitated by the Fe (hydr)oxides in the tailings in 200 mg L-1 V(V) treatment. This portion of V mainly occurred in acid-soluble and reducible fractions in the tailings after a 7-day incubation, accounting for >71.7 % of the total V. However, these two factions of V with high bioavailability were gradually mineralized over time and transferred to residual V, which is difficult to move and has low bioavailability. Mineral phase analysis revealed that additional V(V) favored the formation of melanovanadite (Ca2V8O20·10H2O) and chromium vanadium oxide (Cr2V4O13) in the tailings. This study reveals that the dissolved V influenced the fractionation and redistribution of solid-phase V during tailing weathering, improving the understanding of the geochemical processes of V in tailing profiles and providing important guidance for the management of V-containing tailings.
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Affiliation(s)
- Chun-Dan Gan
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin 644000, China
| | - Jin-Yan Yang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin 644000, China.
| | - Xin-Yue Du
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin 644000, China
| | - Jia-Li Li
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin 644000, China
| | - Qi-Xuan Tang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Aleksander Nikitin
- Institute of Radiobiology of the National Academy of Sciences of Belarus, Fedjuninskogo str., 4, 246007 Gomel, Belarus
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Chen S, Xu J, Peng L, Cheng Z, Kuang X, Li D, Peng C, Song H. Cadmium accumulation in rice grains is mitigated by duckweed-like hydrophyte through adsorption and increased ammonia nitrogen. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 890:164510. [PMID: 37257595 DOI: 10.1016/j.scitotenv.2023.164510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/21/2023] [Accepted: 05/25/2023] [Indexed: 06/02/2023]
Abstract
Although increasing attention has been paid to agronomic measures for reducing the heavy metal load in rice grain, the effects of duckweed-paddy co-cropping technology on the accumulation of cadmium (Cd) in rice grains remain unclear. To investigate its specific effects on Cd accumulation in paddy fields, three types of duckweed-like hydrophyte (DH), Azolla imbricata, Spirodela polyrrhiza, and Lemna minor were chosen for study. Their use resulted in a reduction of Cd content in rice grains from 0.40 mg/kg to <0.20 mg/kg, with A. imbricata yielding the best results (0.15 mg/kg). The three types of DH reduced the available Cd content in the soil by 10 % to 35 % after the paddy tillering stage. The reduction of available Cd content was attributed to the absorption, high pH, and increase of relative abundance of special bacteria of immobilizing Cd. In addition, DH could regulate soil nitrogen leading to ammonium nitrogen increased from 75 mg/kg to 100 mg/kg, while nitrate nitrogen decreased from 0.55 to 0.1-0.3 mg/kg. The increase of ammonium nitrogen content might induce the low Cd transfer ability in rice plant and then low Cd content in rice grain. This study demonstrated that DH has a good effect on the reduction of the Cd concentration in rice grains. Consequently, duckweed-paddy co-cropping technology offers a potential solution to heavy metal pollution and agricultural non-point source pollution, as it not only reduces Cd levels in rice plants, but also fixes nitrogen, reducing the need for nitrogen application.
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Affiliation(s)
- Shaoning Chen
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Junhui Xu
- Agriculture and Rural Bureau of Heshan District, Yiyang City, Hunan Province Yiyang 413002, PR China
| | - Liang Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China.
| | - Ziyi Cheng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Xiaolin Kuang
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Dan Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Cheng Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Huijuan Song
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
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Chen D, Wang G, Chen C, Feng Z, Jiang Y, Yu H, Li M, Chao Y, Tang Y, Wang S, Qiu R. The interplay between microalgae and toxic metal(loid)s: mechanisms and implications in AMD phycoremediation coupled with Fe/Mn mineralization. JOURNAL OF HAZARDOUS MATERIALS 2023; 454:131498. [PMID: 37146335 DOI: 10.1016/j.jhazmat.2023.131498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 04/10/2023] [Accepted: 04/24/2023] [Indexed: 05/07/2023]
Abstract
Acid mine drainage (AMD) is low-pH with high concentration of sulfates and toxic metal(loid)s (e.g. As, Cd, Pb, Cu, Zn), thereby posing a global environmental problem. For decades, microalgae have been used to remediate metal(loid)s in AMD, as they have various adaptive mechanisms for tolerating extreme environmental stress. Their main phycoremediation mechanisms are biosorption, bioaccumulation, coupling with sulfate-reducing bacteria, alkalization, biotransformation, and Fe/Mn mineral formation. This review summarizes how microalgae cope with metal(loid) stress and their specific mechanisms of phycoremediation in AMD. Based on the universal physiological characteristics of microalgae and the properties of their secretions, several Fe/Mn mineralization mechanisms induced by photosynthesis, free radicals, microalgal-bacterial reciprocity, and algal organic matter are proposed. Notably, microalgae can also reduce Fe(III) and inhibit mineralization, which is environmentally unfavorable. Therefore, the comprehensive environmental effects of microalgal co-occurring and cyclical opposing processes must be carefully considered. Using chemical and biological perspectives, this review innovatively proposes several specific processes and mechanisms of Fe/Mn mineralization that are mediated by microalgae, providing a theoretical basis for the geochemistry of metal(loid)s and natural attenuation of pollutants in AMD.
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Affiliation(s)
- Daijie Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Guobao Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Chiyu Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Zekai Feng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuanyuan Jiang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Hang Yu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Mengyao Li
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuanqing Chao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Yetao Tang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Shizhong Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China.
| | - Rongliang Qiu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
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