We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Do microplastics affect sulfamethoxazole sorption in soil? Experiments on polymers, ionic strength and fulvic acid
Summary
Researchers investigated how microplastics affect the sorption of sulfamethoxazole antibiotic in soil, finding that polystyrene microplastics increased antibiotic adsorption rates but reduced equilibrium adsorption capacity, with ionic strength and fulvic acid further modifying the interaction in complex soil environments.
Microplastics (MPs) and sulfamethoxazole (SMX) are emerging contaminants that are ubiquitous in the soil environment. In this study, we investigated MPs polymer type and soil environmental factor effects on SMX adsorption behavior in the soil system. Our results showed that MPs dosage affected the soil particles' SMX adsorption rate and capacity (Qe). Adding 1 % polystyrene (PS) increased the SMX adsorption rate significantly. The value of K, which represented the adsorption rate, increased from 0.569 h to 1.019 h. However, the addition of MPs reduced the soil's SMX equilibrium adsorption capacity slightly. Moreover, increasing salinity strength enhanced SMX adsorption capacity by MPs significantly. However, increasing calcium ions concentration decreased SMX adsorption in the MPs amended soil due to multivalent cationic bridging and competitive adsorption mechanisms. In addition, we observed that fulvic acid addition inhibited SMX adsorption. This study suggests that the addition of MPs reduced the adsorption of SMX in the soil slightly due to dilution effect. Meanwhile, changes in environmental factors also affected the adsorption behavior of SMX in soil amended with MPs.
Sign in to start a discussion.
More Papers Like This
Impact of Microplastics on Ciprofloxacin Adsorption Dynamics and Mechanisms in Soil
Researchers investigated how microplastics affect the adsorption dynamics and mechanisms of ciprofloxacin (an antibiotic) in soil, finding that microplastics competed with soil particles for antibiotic binding and altered the overall fate and mobility of ciprofloxacin in the soil environment.
A contrasting alteration of sulfamethoxazole bioaccessibility in two different soils amended with polyethylene microplastic: In-situ measurement using diffusive gradients in thin films
Researchers found that polyethylene microplastics altered the bioaccessibility of the antibiotic sulfamethoxazole differently in two soil types, increasing it in sandy soil but decreasing it in clay soil, demonstrating that soil composition critically mediates microplastic-antibiotic interactions.
Do Microplastics in Soil Influence the Bioavailability of Sulfamethoxazole to Plants?
Researchers investigated how three types of microplastics affect the availability and toxicity of the antibiotic sulfamethoxazole in soil using sorghum plants. They found that low concentrations of the antibiotic actually stimulated plant growth, while higher concentrations inhibited it, and the presence of microplastics generally reduced the antibiotic's toxicity. The study highlights that microplastics in agricultural soils can alter how pharmaceutical contaminants behave, with polystyrene having the strongest effect on drug availability.
The fate and risk of microplastic and antibiotic sulfamethoxazole coexisting in the environment
Researchers investigated sulfamethoxazole antibiotic adsorption onto polyamide microplastics and found that pH significantly influenced uptake, with adsorbed antibiotics more readily released in natural water than ultrapure water, posing environmental risks.
Influence of microplastics on the availability of antibiotics in soils
Researchers tested how three common types of microplastics affect the availability of antibiotics in different soil types. They found that microplastics significantly reduced the amount of antibiotics accessible in soil by providing extra binding sites and altering soil chemistry. The findings suggest that microplastic contamination in agricultural soils could change how antibiotics move through the environment.