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Open research questions in Arsenic contamination and mitigation

94 gap statements mined from Arsenic contamination and mitigation papers in our 4.5M-paper local library, which holds 582 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

What the literature leaves open

  • The study was conducted in a microcosm incubation experiment, - The experiment had a limited number of replicates (four replicates per treatment), - The study only investigated the effects of DMAs and biochar on CH₄ emissions in paddy soil

    Biochar mitigates dimethylarsenate-stimulated methane emissions mediated by DOM-microbe interactions in paddy soils · 2026 · DOI

  • Investigating the long-term effects of DMAs and biochar on CH₄ emissions in paddy soil, - Examining the mechanisms by which biochar mitigates the stimulatory impact of DMAs on CH₄ emissions, - Studying the effects of DMAs and biochar on CH₄ emissions in different types of soil

    Biochar mitigates dimethylarsenate-stimulated methane emissions mediated by DOM-microbe interactions in paddy soils · 2026 · DOI

  • Subsequent research can focus on the scientific issues of the type, quantity and regulation of Pi transporters - The path by which As(V) enters the grain and the manner and mechanism of As(V) enrichment in different parts should be further clarified - The mechanism of MMA(V) being partially reduced to MMA(III) in the rice roots merits further study

    The Molecular Mechanism of the Response of Rice to Arsenic Stress and Effective Strategies to Reduce the Accumulation of Arsenic in Grain · 2024 · DOI

  • There is a lack of systematic discussion on measures to reduce arsenic in rice based on its mechanism of action. The problem of using the same measures to obtain the opposite results may be due to the different species of arsenic or soil environments.

    The Molecular Mechanism of the Response of Rice to Arsenic Stress and Effective Strategies to Reduce the Accumulation of Arsenic in Grain · 2024 · DOI

  • Complex, non-linear interactions between hydrogeochemical, geological, and soil factors. Limited availability of data on arsenic contamination. Difficulty in capturing the spatial variability of arsenic concentrations using traditional regression models.

    Predicting Arsenic Contamination in Groundwater: A Comparative Analysis of Machine Learning Models in Coastal Floodplains and Inland Basins · 2024 · DOI

  • The mechanisms responsible for high arsenic levels in groundwater are poorly understood. There is a critical need for the development of reliable prediction methods. The interaction between surface water and groundwater, precipitation, and human activities can influence arsenic concentration, but is not well understood.

    Predicting Arsenic Contamination in Groundwater: A Comparative Analysis of Machine Learning Models in Coastal Floodplains and Inland Basins · 2024 · DOI

  • However, the mechanistic basis of these coupled processes remains poorly understood.

    Microbial Bioenergetics and Ecology Govern the Coupled Biogeochemical Cycling of Arsenic/Antimony and Macronutrients · 2026 · DOI

  • Given the active methane oxidation in paddy soils, methanotrophs have considerable potential to generate ROS yet their role in As(III) oxidation remains unclear.

    Methanotroph-Derived Reactive Oxygen Species Facilitate Arsenic Oxidation in Paddy Soils · 2026 · DOI

  • Environmental arsenic exposure impairs spermatogenesis and testicular function, but the underlying mechanism remains unclear.

    Arsenic disturbs spermatogenesis via disrupting Sertoli cell junctions in mice: potential involvement of the TGF-β3/p38 MAPK pathway · 2026 · DOI

  • Very little is known about the intraspecific variation of crop responses to this hazardous metalloid; therefore, we compare the response of two maize hybrids to elevated Sb.

    Intraspecific variation in maize root responses to antimony · 2026 · DOI

  • While hepatic steatosis has been identified as the initiating event of arsenic-induced MASLD, its effect biomarkers and underlying mechanisms remain unclear, a knowledge gap that is crucial for risk monitoring and early intervention.

    DNA hypermethylation of choline kinases drives blockage of choline-phosphatidylcholine biosynthesis: lipidomic biomarkers and epigenetic insights of hepatic steatosis induced by arsenic · 2026 · DOI

  • While As-AOM has been confirmed as an important methane sink and contributor to arsenic mobilisation in freshwater environments, the underlying microbiological mechanisms remain to be empirically demonstrated.

    Arsenate reduction coupled to anaerobic oxidation of methane by members of the Methanoperedenaceae · 2026 · DOI

  • However, the microbial ecological processes driving arsenic speciation in paddy soils, and their link to striking geographic disparities in rice arsenic speciation profiles and disease prevalence, remain poorly understood.

    The balance between microbial arsenic methylation and demethylation in paddy soils underpins global arsenic risk and straighthead disease in rice · 2025 · DOI

  • However, their effectiveness and optimization for foliar application in reducing As stress, especially in Pak choi, has not been reported yet.

    Optimization of exogenous CeO2 nanoparticles on Pak choi (Brassica rapa L. var. chinensis) to alleviate arsenic stress · 2025 · DOI

  • Comparative analyses suggest that As(V) is taken up through phosphate transporters, whereas the transport mechanism of Sb(V) remains unclear.

    Research progress on the uptake and transport of antimony and arsenic in the soil-crop system · 2025 · DOI

  • However, the mechanisms by which PGPR modulate rhizosphere communities and plant growth under antimony (Sb) stress remain poorly understood.

    Antimony-resistant PGPR mitigates Sb toxicity and accumulation in peppers by restructuring rhizosphere microorganisms · 2025 · DOI

  • However, the precise mechanism by which arsenic modulates ROS levels remains unclear.

    Arsenic promotes ROS-mediated malignant transformation of bronchial epithelial cells by specifically downregulating TXNL1 expression · 2025 · DOI

  • While soil nutrient heterogeneity is known to influence plant fitness and ecosystem diversity, the ecological effects of heterogeneous arsenic (As) contamination on plant–microbe interactions remain unclear.

    Heterogeneous distribution of toxic arsenic modulates the mutualistic interaction between Pteris vittata and soil microbiota · 2025 · DOI

  • Nanoenabled agriculture technology exhibits potential in reducing arsenic uptake in rice; however, a systematic understanding of the rice–soil–microorganism process of nanomaterials (NMs) is lacking.

    Metalloid Nanomaterials Alleviate Arsenic Phytotoxicity and Grain Accumulation in Rice: Mechanisms of Abiotic Stress Tolerance and Rhizosphere Behavior · 2025 · DOI

  • Little is known about the electron shuttle ability of dissolved organic matter (DOM) and its effects on arsenic (As) mobilization, which makes the underlying mechanism of groundwater As enrichment elusive.

    Electrochemistry and Molecular Compositions Reflect Electron Shuttling of Dissolved Organic Matter in High Arsenic Groundwater · 2025 · DOI

  • Although most studies revealed that As(V) reduction occurs in the aqueous phase, it remains unclear whether abiotic As(V) reduction driven by minerals in drought environments also exists.

    Spontaneous Abiotic Reduction of Arsenate to Arsenite Mediated by Structural Fe(II) Resulting from Abundant Oxygen Vacancy Clusters in Poorly Crystalline Ferrihydrite in Drought Environments · 2025 · DOI

  • Alternating flooded (anoxic) and drained (oxic) conditions restructure redox chemistry in paddy soils, but how drainage shapes vertical distributions of reactive oxygen species (ROS) and metal mobility remains unclear.

    Near-Surface Hydroxyl Radical Hotspots Mobilize Cadmium and Immobilize Arsenic during Paddy Soil Drainage · 2025 · DOI

  • However, microbial functioning related to carbon and nitrogen under ERW remains elusive.

    Divergent responses of carbon and nitrogen functional genes composition to enhanced rock weathering · 2025 · DOI

  • The effectiveness of these bacteria should be validated in paddy fields; hence, safe rice grains with a good starch content and aroma could be produced.

    As(III)-oxidizing and plant growth-promoting bacteria increase the starch biosynthesis-related enzyme activity, 2-AP levels, and grain quality of arsenic-stressed rice plants · 2024 · DOI

  • Molecular interaction and atomic level degradation mechanisms for enzyme-As exploration are, however, underexplored in those approaches.

    In Silico Insights into the Arsenic Binding Mechanism Deploying Application of Computational Biology-Based Toolsets · 2024 · DOI

Most-cited papers in Arsenic contamination and mitigation

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94 gap statements have been mined from Arsenic contamination and mitigation papers in our 4.5M-paper local library, which holds 582 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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