Microwave acid treatment induces endogenous active adsorption sites in montmorillonite for cadmium immobilization in soil
Source abstract
Abstract
Cadmium (Cd) contamination poses significant environmental and health risks, particularly in soil and water systems. In response to this, this work presents a novel approach for enhancing the cadmium adsorption capacity of montmorillonite (Mt) through microwave-assisted acid treatment (MAT). This treatment selectively generates highly reactive Al( V) sites, leading to a dramatic increase in specific surface area (from 69.4 to 388.32 m 2/g), porosity, and the availability of active adsorption sites. As a result, at low cadmium concentrations, 4MAT-Mt exhibits significantly improved Cd removal performance (∼99.9 % removal efficiency) compared to pristine Mt. (∼95 % removal efficiency). The adsorption process follows pseudo-second-order kinetics, indicating that chemical interactions are the primary driving force. Additionally, 4MAT-Mt demonstrates exceptional efficiency in soil remediation, effectively reducing Cd leachability (nearly 100 %) at low Cd concentrations. These findings suggest that 4MAT-Mt, with its enhanced adsorption properties, offers a promising, sustainable solution for mitigating Cd pollution in contaminated environments.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Heavy metals in environment · Coal and Its By-products
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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