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  1. Article ; Online: Microbial pathways of nitrous oxide emissions and mitigation approaches in drylands.

    Shaaban, Muhammad

    Journal of environmental management

    2024  Volume 354, Page(s) 120393

    Abstract: Drylands refer to water scarcity and low nutrient levels, and their plant and biocrust distribution is highly diverse, making the microbial processes that shape dryland functionality particularly unique compared to other ecosystems. Drylands are ... ...

    Abstract Drylands refer to water scarcity and low nutrient levels, and their plant and biocrust distribution is highly diverse, making the microbial processes that shape dryland functionality particularly unique compared to other ecosystems. Drylands are constraint for sustainable agriculture and risk for food security, and expected to increase over time. Nitrous oxide (N
    MeSH term(s) Nitrous Oxide/metabolism ; Ecosystem ; Agriculture/methods ; Greenhouse Gases/metabolism ; Nitrogen/analysis ; Soil
    Chemical Substances Nitrous Oxide (K50XQU1029) ; Greenhouse Gases ; Nitrogen (N762921K75) ; Soil
    Language English
    Publishing date 2024-02-15
    Publishing country England
    Document type Review ; Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2024.120393
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  2. Article ; Online: Soil adsorption potential: Harnessing Earth's living skin for mitigating climate change and greenhouse gas dynamics.

    Shaaban, Muhammad / Nunez-Delgado, Avelino

    Environmental research

    2024  , Page(s) 118738

    Abstract: Soil adsorption, which could be seen as a crucial ecosystem service, plays a pivotal role in regulating environmental quality and climate dynamics. However, despite its significance, it is often undervalued within the realms of research and policy ... ...

    Abstract Soil adsorption, which could be seen as a crucial ecosystem service, plays a pivotal role in regulating environmental quality and climate dynamics. However, despite its significance, it is often undervalued within the realms of research and policy frameworks. This article delves into the multifaceted aspects of soil adsorption, incorporating insights from chemistry and material science, ecological perspectives, and recent advancements in the field. In exploring soil components and their adsorption capacities, the review highlights how organic and inorganic constituents orchestrate soil's aptitude for pollutant mitigation and nutrient retention/release. Innovative materials and technologies such as biochar are evaluated for their efficacy in enhancing these natural processes, drawing a link with the sustainability of agricultural systems. The symbiosis between soil microbial diversity and adsorption mechanisms is examined, emphasizing the potential for leveraging this interaction to bolster soil health and resilience. The impact of soil adsorption on global nutrient cycles and water quality underscores the environmental implications, portraying it as a sentinel in the face of escalating anthropogenic activities. The complex interplay between soil adsorption mechanisms and climate change is dissected, identifying research gaps and advocating for future investigations to elucidate the dynamics underpinning this relation. Policy and socioeconomic aspects form a crucial counterpart to the scientific discourse, with the review assessing how effective governance, incentivization, and community engagement are essential for translating soil adsorption's functionality into tangible climate change mitigation and sustainable land-use strategies. Integrating these diverse but interconnected strata, the article presents a comprehensive overview that not only charts the current state of soil adsorption research but also casts a vision for its future trajectory. It calls for an integrated approach combining scientific inquiry, technological innovation, and proactive policy to leverage soil adsorption's full potential to address environmental challenges and catalyze a transition towards a more sustainable and resilient future.
    Language English
    Publishing date 2024-03-20
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2024.118738
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  3. Article ; Online: Genome analysis of Shewanella putrefaciens 4H revealing the potential mechanisms for the chromium remediation.

    Cai, Yajun / Chen, Xu / Qi, Hanghang / Bu, Fantong / Shaaban, Muhammad / Peng, Qi-An

    BMC genomics

    2024  Volume 25, Issue 1, Page(s) 136

    Abstract: Microbial remediation of heavy metal polluted environment is ecofriendly and cost effective. Therefore, in the present study, Shewanella putrefaciens stain 4H was previously isolated by our group from the activated sludge of secondary sedimentation tank ... ...

    Abstract Microbial remediation of heavy metal polluted environment is ecofriendly and cost effective. Therefore, in the present study, Shewanella putrefaciens stain 4H was previously isolated by our group from the activated sludge of secondary sedimentation tank in a dyeing wastewater treatment plant. The bacterium was able to reduce chromate effectively. The strains showed significant ability to reduce Cr(VI) in the pH range of 8.0 to 10.0 (optimum pH 9.0) and 25-42 ℃ (optimum 30 ℃) and were able to reduce 300 mg/L of Cr(VI) in 72 h under parthenogenetic anaerobic conditions. In this paper, the complete genome sequence was obtained by Nanopore sequencing technology and analyzed chromium metabolism-related genes by comparative genomics The genomic sequence of S. putrefaciens 4H has a length of 4,631,110 bp with a G + C content of 44.66% and contains 4015 protein-coding genes and 3223,  2414, 2343 genes were correspondingly annotated into the COG, KEGG, and GO databases. The qRT-PCR analysis showed that the expression of chrA, mtrC, and undA genes was up-regulated under Cr(VI) stress. This study explores the Chromium Metabolism-Related Genes of S. putrefaciens 4H and will help to deepen our understanding of the mechanisms of Cr(VI) tolerance and reduction in this strain, thus contributing to the better application of S. putrefaciens 4H in the field of remediation of chromium-contaminated environments.
    MeSH term(s) Shewanella putrefaciens/genetics ; Shewanella putrefaciens/metabolism ; Oxidation-Reduction ; Chromium/toxicity ; Chromium/metabolism ; Bacteria/metabolism
    Chemical Substances chromium hexavalent ion (18540-29-9) ; Chromium (0R0008Q3JB)
    Language English
    Publishing date 2024-02-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041499-7
    ISSN 1471-2164 ; 1471-2164
    ISSN (online) 1471-2164
    ISSN 1471-2164
    DOI 10.1186/s12864-024-10031-9
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  4. Article ; Online: Soil pH management for mitigating N

    Shaaban, Muhammad / Hu, Ronggui / Wu, Yupeng / Song, Ling / Xu, Peng

    Environmental research

    2023  Volume 225, Page(s) 115542

    Abstract: Soil nitrous oxide ( ... ...

    Abstract Soil nitrous oxide (N
    MeSH term(s) Soil/chemistry ; Oryza/genetics ; RNA, Ribosomal, 16S ; Carbon ; Nitrous Oxide ; Hydrogen-Ion Concentration ; Soil Microbiology
    Chemical Substances Soil ; RNA, Ribosomal, 16S ; Carbon (7440-44-0) ; calcium magnesium carbonate (UG9H2002BF) ; Nitrous Oxide (K50XQU1029)
    Language English
    Publishing date 2023-02-21
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.115542
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  5. Article ; Online: The effect of upland crop planting on field N2O emission from rice-growing seasons: A case study comparing rice-wheat and rice-rapeseed rotations

    Xu, Peng / Jiang, Mengdie / Khan, Imran / Shaaban, Muhammad / Zhao, Jinsong / Yang, Tewu / Hu, Ronggui

    Agriculture, Ecosystems and Environment. 2023 May, v. 347 p.108365-

    2023  

    Abstract: Paddy fields, especially under flooded rice-upland crop rotation modes, undergo tremendous changes in soil redox conditions. The effects of different upland crop plantations on field N₂O emissions from the rice-planting period and the underlying ... ...

    Abstract Paddy fields, especially under flooded rice-upland crop rotation modes, undergo tremendous changes in soil redox conditions. The effects of different upland crop plantations on field N₂O emissions from the rice-planting period and the underlying mechanisms are scarce. In this study, two types of flooded rice-upland cropping rotation modes, namely, rice-rapeseed rotation (RR) and rice-wheat rotation (RW), were selected to investigate the effects of different upland crop plantations on field N₂O emissions during the rice-growing period, in central China. To confirm the effect of upland crop plantations on soil variables and associated functional genes, conventional rice planting (RR-CP and RW-CP) with a part of the non-rice area (RR-NP and RW-NP) during the rice season was implemented. Results revealed that seasonal N₂O emissions from RR-NP and RW-NP treatments were 1.83 ± 0.18 and 1.43 ± 0.25, and 1.41 ± 0.09 and 0.88 ± 0.08 kg N ha⁻¹, respectively, during two consecutive rice-plantation seasons, which were significantly higher than those from RR-CP treatment (1.38 ± 0.16 and 0.91 ± 0.15 kg N ha⁻¹) and RW-CP treatment (0.95 ± 0.08 and 0.50 ± 0.10 kg N ha⁻¹). Higher N₂O emissions from RR rotation than from RW rotation, regardless of rice planting, indicated that upland cultivation affected soil N₂O efflux. For rice planting treatments, strong positive relationships between N₂O fluxes and soil-dissolved organic carbon (DOC), ammonium (NH₄⁺), nitrate (NO₃⁻), and functional genes (nirS, nirK, and nosZ genes) were observed, implying that soil available C and N, and related functional genes are key regulatory factors controlling N₂O emissions. Compared with the RW-CP treatment, the higher abundance of the nirK gene and lower nosZ/(nirS + nirK) ratio from the RR-CP treatment may facilitate greater N₂O production, while reducing conversion of N₂O to N₂, resulting in increased N₂O emissions. Furthermore, structural equation model (SEM) showed that field flood depth (FD), soil available C and N, and the abundance of nirS gene, together, displayed more than 70 % impact effect on N₂O emission for RR-CP treatment, while, FD, soil available N, and nirS and nirK genes, together, displayed more than 60 % impact effect on N₂O emission for RW-CP treatment. Our results suggest that suitable upland crop rice cultivation could be beneficial for mitigating soil N₂O emissions.
    Keywords agriculture ; ammonium ; case studies ; crop rotation ; environment ; genes ; highlands ; nitrates ; nitrous oxide production ; organic carbon ; paddies ; rice ; soil ; structural equation modeling ; China ; Flooded rice-upland rotations ; N2O emission ; Soil variables ; Environment factors ; Functional genes
    Language English
    Dates of publication 2023-05
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 602345-9
    ISSN 1873-2305 ; 0167-8809
    ISSN (online) 1873-2305
    ISSN 0167-8809
    DOI 10.1016/j.agee.2023.108365
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  6. Article ; Online: The effects of continuous straw returning strategies on SOC balance upon fresh straw incorporation

    Wu, Yupeng / He, Jianli / Liu, Wei / Cheng, Weiguo / Shaaban, Muhammad / Jiang, Yanbin

    Environmental Research. 2023 Sept., v. 232 p.116225-

    2023  

    Abstract: Continuous straw returning is widely encouraged for augmenting soil organic carbon (SOC) in arable lands. However, the magnitude of changes in net SOC related to native SOC mineralization and new SOC development upon fresh straw incorporation remains ... ...

    Abstract Continuous straw returning is widely encouraged for augmenting soil organic carbon (SOC) in arable lands. However, the magnitude of changes in net SOC related to native SOC mineralization and new SOC development upon fresh straw incorporation remains elusive, particularly in soils after continuous straw returning with different strategies. To address this, soil that had undergone nine years of straw returning with different strategies (NS, non-straw returning; DS, direct straw returning; IS, indirect straw returning) was incubated with fresh ¹³C-labeled straw for 45 days. Fresh straw incorporation stimulated native SOC-derived CO₂ emission in DS soil, which in turn promoted straw-derived CO₂ emission in IS soil. Overall, the amounts of newly developed SOC from straw (2.41–2.59 g C/kg soil) overcompensated for the native SOC losses (0.91–1.37 g C/kg soil) by mineralization, and led to net C sequestration in all treatments. No obvious difference was found in the amounts of SOC sequestrated from straw between the DS and NS soils, while the amount of native SOC mineralization increased by 40–50% in the DS soil relative to other treatments, thus resulting in lower net C sequestration in the DS soil (1.21 g C/kg soil) than IS and NS soil (1.43 and 1.65 g C/kg for IS and NS soil, respectively). Spearman's correlation analyses indicated a significant (p < 0.01) and positive correlation between SOC contents and native soil C mineralization, while the soil microbial index played a greater role in influencing fresh straw sequestration (p < 0.01). In conclusion, the DS soil showed a weaker effect on SOC sequestration than IS after 9 years of practices, upon fresh straw incorporation. This difference may be attributed to the magnitude of native SOC mineralization in the soil. Besides the straw-C input rate, results emphasize that native soil C protection should be also considered in long-term SOC sequestration practices.
    Keywords carbon dioxide ; carbon sequestration ; mineralization ; soil ; soil organic carbon ; straw ; Long-term straw returning ; Soil carbon sequestration ; Soil chemical properties ; Soil microbial community ; Fresh straw incorporation
    Language English
    Dates of publication 2023-09
    Publishing place Elsevier Inc.
    Document type Article ; Online
    Note Pre-press version
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.116225
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  7. Article ; Online: Soil pH management for mitigating N2O emissions through nosZ (Clade I and II) gene abundance in rice paddy system

    Shaaban, Muhammad / Hu, Ronggui / Wu, Yupeng / Song, Ling / Xu, Peng

    Environmental Research. 2023 May, v. 225 p.115542-

    2023  

    Abstract: Soil nitrous oxide (N₂O) is produced by abiotic and biotic processes, but it is solely consumed by denitrifying microbes-encoded by nosZ genes. The nosZ gene includes two groups i.e. Clade I and Clade II, which are highly sensitive to pH. Managing pH of ... ...

    Abstract Soil nitrous oxide (N₂O) is produced by abiotic and biotic processes, but it is solely consumed by denitrifying microbes-encoded by nosZ genes. The nosZ gene includes two groups i.e. Clade I and Clade II, which are highly sensitive to pH. Managing pH of acidic soils can substantially influence soil N₂O production or consumption through nosZ gene abundance. Nevertheless, the response of nosZ (Clade I and Clade II) to pH management needs elucidation in acidic soils. To clarify this research question, a pot experiment growing rice crop was conducted with three treatments: control (only soil), low dose of dolomite (LDD), and high dose of dolomite (HDD). The soil pH increased from 5.41 to 6.23 in the control, 6.5 in LDD and 6.8 in HDD treatment under flooded condition. The NH₄⁺ and NO₃⁻ contents increased and reached the maximum at 30.4 and 21.5 mg kg⁻¹, respectively, in HDD treatment under flooding condition. The contents of dissolved organic carbon and microbial biomass carbon showed a swift rise at midseason aeration and reached maximum at 30.7 and 101 mg kg⁻¹ in the HDD treatment. Clade I, Clade II and 16S rRNA genes abundance increased with the onset of flooding, and occurred maximum in the HDD treatment. A peak in N₂O emissions (5.96 μg kg⁻¹ h⁻¹) occurred at midseason events in the control when no dolomite was added. Dolomite application significantly (p ≤ 0.001) suppressed N₂O emissions, and HDD treatment was more effective in reducing emissions. Pearson correlation, linear regressions and principal component analysis displayed that increased soil pH and Clade I and Clade II were the main controlling factors for N₂O emission mitigation in acidic soil. This research demonstrates that ameliorating soil acidity with dolomite application is a potential option for the mitigation of N₂O emissions.
    Keywords acid soils ; aeration ; denitrification ; dissolved organic carbon ; dolomite ; genes ; microbial carbon ; nitrous oxide ; paddies ; principal component analysis ; research ; rice ; soil pH ; Clade I and Clade II ; nosZ gene ; N2O emissions ; Rice paddy
    Language English
    Dates of publication 2023-05
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.115542
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  8. Article ; Online: Efficient removal of Cr(VI) and As(V) from an aquatic system using iron oxide supported typha biochar

    Cai, Yajun / Ran, Zhonglyu / Cang, Yan / Chen, Xu / Shaaban, Muhammad / Peng, Qi-An

    Environmental Research. 2023 May, v. 225 p.115588-

    2023  

    Abstract: The removal of Cr(VI) and As(V) from aqueous solutions has been a worldwide concern. In this study, Typha biochar (FBC) with magnetic iron oxide was prepared by impregnating Typha with FeCl₃ and performing pyrolysis, and the possible mechanism of Cr(VI) ... ...

    Abstract The removal of Cr(VI) and As(V) from aqueous solutions has been a worldwide concern. In this study, Typha biochar (FBC) with magnetic iron oxide was prepared by impregnating Typha with FeCl₃ and performing pyrolysis, and the possible mechanism of Cr(VI) and As(V) removal was investigated by combining characterization means and adsorption experiments. The results showed that the modified Typha biochar is rich in pores and has the potential to eliminate Cr and As through processes such as exchange and reduction. The single molecule uptake capacities of FBC for Cr(VI) and As(V) were 32.82 and 21.56 mg g⁻¹, respectively. The adsorption process is spontaneous heat absorption, and the adsorption results are also consistent with the proposed secondary kinetic model. FBC still had >60% removal efficiency in the second and third reuse of Cr(VI), indicating its good recyclability. Therefore, this study confirms that FBC can effectively remove both Cr(VI) and As(V).
    Keywords Typha ; absorption ; adsorption ; biochar ; heat ; iron oxides ; kinetics ; magnetism ; pyrolysis ; research ; Modified biochar ; Magnetic iron oxide ; Chromium ; Arsenic ; Removal mechanism
    Language English
    Dates of publication 2023-05
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.115588
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  9. Article ; Online: Effects of water regimes on soil N

    Shaaban, Muhammad / Khalid, Muhammad Salman / Hu, Ronggui / Zhou, Minghua

    Environmental research

    2022  Volume 212, Issue Pt D, Page(s) 113544

    Abstract: Water regimes strongly impact soil C and N cycling and the associated greenhouse gases (GHGs, i.e., ... ...

    Abstract Water regimes strongly impact soil C and N cycling and the associated greenhouse gases (GHGs, i.e., CO
    MeSH term(s) Agriculture/methods ; Carbon ; Carbon Dioxide/analysis ; Fertilizers/analysis ; Guanidines ; Methane ; Nitrogen/analysis ; Nitrous Oxide ; Soil/chemistry ; Water/chemistry
    Chemical Substances Fertilizers ; Guanidines ; Soil ; Water (059QF0KO0R) ; Carbon Dioxide (142M471B3J) ; Carbon (7440-44-0) ; Nitrous Oxide (K50XQU1029) ; dicyandiamido (M9B1R0C16H) ; Nitrogen (N762921K75) ; Methane (OP0UW79H66)
    Language English
    Publishing date 2022-05-25
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2022.113544
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  10. Article ; Online: The effects of continuous straw returning strategies on SOC balance upon fresh straw incorporation.

    Wu, Yupeng / He, Jianli / Liu, Wei / Cheng, Weiguo / Shaaban, Muhammad / Jiang, Yanbin

    Environmental research

    2023  Volume 232, Page(s) 116225

    Abstract: Continuous straw returning is widely encouraged for augmenting soil organic carbon (SOC) in arable lands. However, the magnitude of changes in net SOC related to native SOC mineralization and new SOC development upon fresh straw incorporation remains ... ...

    Abstract Continuous straw returning is widely encouraged for augmenting soil organic carbon (SOC) in arable lands. However, the magnitude of changes in net SOC related to native SOC mineralization and new SOC development upon fresh straw incorporation remains elusive, particularly in soils after continuous straw returning with different strategies. To address this, soil that had undergone nine years of straw returning with different strategies (NS, non-straw returning; DS, direct straw returning; IS, indirect straw returning) was incubated with fresh
    MeSH term(s) Soil ; Carbon/metabolism ; Agriculture/methods ; Carbon Dioxide ; Carbon Sequestration
    Chemical Substances Soil ; Carbon (7440-44-0) ; Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2023-05-27
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.116225
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