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Amide groups within polystyrene accelerates tetracycline removal in a continuous advanced microalgal treatment system
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Researchers found that polystyrene microplastics can actually help microalgae remove the antibiotic tetracycline from livestock wastewater more efficiently. The interaction between the antibiotic and the plastic particles reduced toxicity to the algae, allowing them to grow more vigorously and break down the pollutants faster. The study suggests that advanced microalgal treatment systems could simultaneously address both antibiotic and microplastic contamination in agricultural wastewater.
Livestock effluents are challenging to be treated owing that antibiotics and microplastics are untargeted for most biological technologies. As far, microalgal wastewater treatment is recognized as an effective technique for dealing with. In this study, a continuous-flow system was conducted over 45 days to evaluate the effectiveness of Chlamydomonas sp. JSC in removing tetracycline (TCH) under the influence of polystyrene (PS). It shows that PS significantly enhanced the dissipation efficiency of TCH from livestock effluents, and 9.83 % TCH removal was increased under 5 mg/L of both TCH and PS exposure. Meanwhile, higher microalgal bioactivity was a significant factor in achieving desirable pollutants removal efficiency, as 87.14 % microalgal biomass was improved owing to reduction of oxidative stress and augmentation of photosynthesis. Importantly, the pivotal active sites, NH2 and CO, were rapidly covered via π-π interactions and hydrogen bonds during adsorption process between TCH and PS, accounting for mitigation of TCH-PS complexes toxicity and improvement of microalgal ribosome metabolism. Additionally, co-exposure to TCH and PS resulted in maximum lipids (0.57 g/L) and energy (20.79 kJ/L) production, further encouraging a fantastic vision for the tertiary process of livestock effluents via advanced microalgal treatment.
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Researchers found that polystyrene microplastics inhibited Chlorella vulgaris growth and reduced its efficiency in removing the antibiotic levofloxacin from freshwater aquaculture wastewater, demonstrating that microplastic pollution can impair microalgae-based water treatment systems.
Alleviating effects of microplastics together with tetracycline hydrochloride on the physiological stress of Closterium sp.
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Researchers studied how PET and PBT microplastics combined with the antibiotic tetracycline affect freshwater microalgae. They found that in some combinations, microplastics actually reduced the toxicity of the antibiotic to the algae, likely by adsorbing the chemical onto their surfaces. The study highlights the complex and sometimes counterintuitive ways that microplastics interact with other pollutants in aquatic environments.
Size-specific mediation of the physiological responses and degradation ability of microalgae to sulfamerazine by microplastics
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Researchers examined how polystyrene microplastics of different sizes affect the ability of marine microalgae to tolerate and break down the antibiotic sulfamerazine. They found that nano-sized plastics were more harmful than larger particles, reducing algal growth and impairing the organisms' ability to degrade the antibiotic. The study reveals that microplastic pollution could interfere with the natural biological breakdown of pharmaceutical contaminants in waterways.
Insight into the effect of microplastics on photocatalytic degradation tetracycline by a dissolvable semiconductor-organic framework
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Researchers investigated how polystyrene microplastics affect the photocatalytic degradation of the antibiotic tetracycline using a novel semiconductor-organic framework catalyst. They found that small amounts of microplastics actually promoted tetracycline breakdown but also altered the degradation products and pathways. The study reveals that microplastics can interfere with water treatment processes in unexpected ways, both helping and hindering pollutant removal depending on conditions.
Divergent responses of microalgal-bacterial granular sludge to two typical microplastics polystyrene and polybutylene succinate during the treatment of sulfamethoxazole-containing wastewater
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This study tested how two types of microplastics, polystyrene and biodegradable polybutylene succinate, affected a biological wastewater treatment system designed to remove antibiotics. The biodegradable plastic actually helped break down the antibiotic sulfamethoxazole more effectively, while polystyrene slightly reduced the system's cleaning performance. The findings suggest that the type of microplastic present in wastewater can change how well treatment plants remove pharmaceutical pollutants.
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