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61,005 resultsShowing papers similar to Effects of Different Passivating Agents on Cd Pollution in Alkaline Farmland Soil
ClearInsights on Immobilization of Cd Contamination in Soil: Synergic Impacts of Water Management and Bauxite Residue
Researchers tested whether combining flooding with bauxite residue or lime could reduce the availability of toxic cadmium in contaminated soil. Both combined treatments raised soil pH and increased the proportion of cadmium locked into stable, residual forms while decreasing the easily exchangeable fraction. The bauxite residue treatment proved slightly more effective at immobilizing cadmium, offering a potential soil remediation strategy for heavy metal-contaminated agricultural land.
A review on adsorption characteristics and influencing mechanism of heavy metals in farmland soil
Researchers reviewed the characteristics and mechanisms of heavy metal adsorption in farmland soil, examining factors including soil heterogeneity, physical and chemical properties, competitive adsorption, and external influences. The study highlights that soil adsorption reduces crop uptake of pollutants like lead and cadmium, providing a natural self-purification capacity for contaminated agricultural land.
Anionic Intercalated CaMgFe-Layered Double Hydroxides for Synchronous Passivation of Heavy Metals Contaminated Farmland Soils with Soil Fertility Enhancement and Microbial Community Reconstruction
Scientists developed a new soil treatment that can trap three dangerous heavy metals (arsenic, cadmium, and lead) in contaminated farmland while also making the soil more fertile for growing crops. The treatment reduced these toxic metals to much safer levels and helped beneficial soil bacteria grow, which is important because heavy metals can move from soil into our food and harm human health. This could help clean up polluted farmland while still allowing farmers to grow healthier food.
The Importance of Humic Acids in Shaping the Resistance of Soil Microorganisms and the Tolerance of Zea mays to Excess Cadmium in Soil
Researchers assessed whether a humic acid soil amendment (Humus Active) could protect maize from cadmium toxicity by modifying the soil bacterial community structure under heavy metal stress. Humic acid treatment improved soil bacterial diversity and reduced cadmium uptake by maize, suggesting that humic preparations can partially restore soil microbiome function and crop health in cadmium-contaminated agricultural land.
A New Sight of Influencing Effects of Major Factors on Cd Transfer from Soil to Wheat (Triticum aestivum L.): Based on Threshold Regression Model
Researchers applied threshold regression models to investigate how major soil factors including pH, organic matter, and clay content influence cadmium transfer from soil to wheat grain (Triticum aestivum L.), identifying threshold effects that conventional linear models cannot capture. The study found that the influence of pH and other soil variables on cadmium bioaccumulation was non-linear, with critical threshold values above or below which transfer dynamics changed markedly.
Different effects of conventional and biodegradable microplastics on the amelioration process of cadmium-contaminated soil
Researchers found that conventional and biodegradable microplastics had different effects on the passivator-based remediation of cadmium-contaminated soil, with biodegradable microplastics showing less interference with the amelioration process compared to conventional plastics.
Surface reactivity of talc: acid-base behaviour and Cd adsorption
Researchers characterized the surface chemistry and cadmium adsorption behavior of natural talc using titration and electrokinetic measurements, finding that cadmium binds most efficiently near neutral to slightly alkaline pH via two inner-sphere surface complexes, with adsorption following Freundlich isotherm kinetics and a pseudo-second-order rate equation.
Assessing the Impact of Soil Humic Substances, Textural Fractions on the Sorption of Heavy Metals (Cd, Pb)
Researchers assessed how soil humic substances and textural fractions influence the sorption of cadmium and lead in different Slovak soil types. The study found that the type and quantity of humic materials significantly affect heavy metal retention, which is relevant to understanding how contaminants interact with soil-bound microplastics.
Microplastics influence the adsorption and desorption characteristics of Cd in an agricultural soil
Batch experiments showed that polyethylene microplastics reduced cadmium adsorption but increased desorption in farmland soil, with effects varying by MP dose, particle size, and pH. The findings indicate microplastics could increase cadmium mobility in agricultural soils, potentially raising risks of crop uptake.
Response of occurrence in microplastics and its adsorped cadmium capacity to simulated agricultural environmental scenarios in sludge-amended soil
Researchers found that UV irradiation of microplastics in sludge-amended soil most significantly increased their capacity to adsorb cadmium, due to surface changes including increased surface area, new crystal formation, and altered functional groups, raising concerns about heavy metal mobilization in agricultural soils.
Microorganisms and Biochar Improve the Remediation Efficiency of Paspalum vaginatum and Pennisetum alopecuroides on Cadmium-Contaminated Soil
Researchers combined plant species (Paspalum vaginatum and Pennisetum americanum), microorganisms, and biochar amendments to improve phytoremediation efficiency for potentially toxic elements in contaminated soil, finding synergistic benefits from the combined approach.
Kaolinite reduced Cd accumulation in peanut and remediate soil contaminated with both microplastics and cadmium
Kaolinite amendments (at 1% and 2%) were found to reduce cadmium accumulation in peanuts and immobilize both cadmium and microplastics in contaminated soil, suggesting kaolinite as a potential soil amendment for remediating co-contamination by MPs and heavy metals.
Strategies for Regulating the Bioavailability and Mobility of Se and Cd in Cd-Contaminated Seleniferous Soils: Coupling the Bioavailable Se:Cd Molar Ratio with Soil Properties
Not relevant to microplastics — this study examines how the ratio of bioavailable selenium to cadmium in naturally selenium-rich soils affects the mobility and availability of both elements, finding that soil type and land use drive these dynamics through changes in iron-aluminum oxides and organic matter.
Polyvinyl chloride microplastics reduce Cd(II) adsorption and enhance desorption with soil-dependent mechanisms
The study investigated how polyvinyl chloride (PVC) microplastics affect cadmium adsorption and desorption in two different soil types. Researchers found that PVC reduced cadmium adsorption and promoted its release back into the soil, potentially increasing its bioavailability and environmental risk.
Impact mechanisms of polyethylene microplastic on Cd adsorption and passivation by KMnO4-modified biochar in different soils
Researchers investigated how polyethylene microplastics affect cadmium (Cd) adsorption and passivation by KMnO4-modified biochar across 50 soil combinations varying in soil type, Cd concentration, and microplastic content. Microplastics increased biochar's Cd adsorption capacity by 1.5-33.1% depending on concentration but also increased Cd leaching risk at higher microplastic loads.
Source, Distribution, and Risk Estimation of Hazardous Elements in Farmland Soils in a Typical Alluvial–Lacustrine Transition Basin, Hunan Province
Researchers investigated the spatial distribution, sources, and health risk of hazardous elements including cadmium, lead, zinc, antimony, and arsenic in farmland soils of an alluvial-lacustrine transition basin in Hunan Province, China, attributing elevated concentrations to anthropogenic activities and assessing exposure risks.
Microplastics in soils with contrasting texture, organic carbon and mineralogy: changes in cadmium adsorption forms and their mobility in soil columns
This study investigated how high-density polyethylene microplastics alter the behavior of cadmium — a toxic heavy metal — in soils with different textures, organic carbon contents, and mineral compositions. Using soil column experiments, researchers found that microplastics changed how cadmium binds to soil particles and how easily it leaches downward, with effects varying depending on the soil type and microplastic particle size. Since cadmium is a known carcinogen and agricultural soils commonly contain both microplastics and heavy metals, understanding their interactions is critical for food safety.
Effect of glyphosate contamination on surface charge change and nutrients of degraded Inceptisols ameliorated with sub-bituminous coal
This study found that glyphosate contamination significantly altered the chemical properties of degraded soils, but adding sub-bituminous coal as an amendment improved pH, organic matter, cation exchange capacity, and nutrient levels. The coal amendment partially counteracted glyphosate's negative effects on soil health, suggesting a practical approach for rehabilitating herbicide-contaminated agricultural land.
Accumulation characteristics and evaluation of heavy metals in soils and vegetables of plastic-covered sheds in typical red soil areas of China
Researchers measured heavy metal levels in soils and vegetables from plastic-covered greenhouses in China and found that cadmium exceeded safe background levels in most samples. While the vegetables generally did not pose an immediate health risk, the accumulation of metals in greenhouse soils is a growing concern. Plastic-covered farming is relevant to microplastic research because the degrading plastic covers are a direct source of microplastics that can carry heavy metals into crops.
Experimental and numerical investigations of biochar-facilitated Cd2+ transport in saturated porous media: role of solution pH and ionic strength
Researchers investigated how nanoscale biochar facilitates cadmium transport in porous media, finding pH and ionic strength significantly affect cotransport behavior.
Effect of Microplastics on the Adsorption and Desorption Properties of Cadmium in Soil
Polyethylene and polypropylene microplastics were found to reduce soil's capacity to adsorb cadmium, a toxic heavy metal, raising concerns that microplastic contamination in farmland soils could increase the mobility and risk of heavy metal pollutants.
Adsorption of Cd and Mn from neutral mine effluents using bentonite, zeolite, and stabilized dewatered sludge
Researchers investigated the adsorption efficiency of cadmium and manganese from neutral mine effluents using three natural sorbents — bentonite, zeolite, and stabilized digested dewatered waste sludge — expanding knowledge on heavy metal removal beyond the acid mine drainage context typically studied.
Adsorption mechanism of cadmium on microplastics and their desorption behavior in sediment and gut environments: The roles of water pH, lead ions, natural organic matter and phenanthrene
Researchers compared how cadmium adsorbs onto five different microplastic types and then desorbs in simulated sediment and gut environments, finding that pH, competing ions, natural organic matter, and co-pollutants like phenanthrene all significantly alter how much cadmium is released.
Different doses of cadmium in soil negatively impact growth, plant mineral homeostasis and antioxidant defense of mung bean plants
Researchers studied how different cadmium concentrations in soil affect the growth, mineral nutrition, and biochemical health of mung bean plants. The study found that increasing cadmium doses significantly disrupted plant mineral homeostasis, reduced chlorophyll and protein content, and impaired antioxidant defense systems in a dose-dependent manner.