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As emerging contaminants, microplastics (MPs) and antibiotics are often detected simultaneously in the water environment, and antibiotics in the water environment are often found on the surface of MPs. MPs can absorb, collect and carry various organic pollutants in water environment through surface adsorption and migration. Compared with the original MPs, the aging MPs has stronger adsorption capacity due to smaller particle size, larger specific surface area, and more adsorption sites. The environmental aging mode of MPs and the adsorption behavior of MPs on various antibiotics in water environment after aging were mainly reviewed, The aging method of MPs and the influencing factors and adsorption mechanism of antibiotics was summarized, and prospects for the aging problem of MPs and the effect on antibiotic adsorption was put forward. [ABSTRACT FROM AUTHOR]

In order to study the influence of thermal aging on the composition, structure and properties of asphalts. The chemical composition, molecular structure as well as high- and low-temperature properties of different asphalts before and after thermal air aging were tested and characterized by chromatographic column method and Fourier transform infrared spectroscopy, which indicated the correlation between composition, structure and properties. The chemical composition and infrared spectrum analysis show that saturates content in the asphalts is basically unchanged during thermal air aging. The aliphatic hydrocarbon branches of aromatics is prone to break and undergo oxidative poly-condensation, resulting in the conversion of aromatics into resins and asphaltenes, which reduces the aliphatic index and increased the aromatic carbonyl and sulfoxide index of asphalt. With the increase of thermal aging temperature, the softening point and viscosity of asphalts are enhanced, and the low-temperature flexibility is decreased. Different asphalts show diverse aging resistance, the asphalt with high saturates content, low aromatics content and aromatic index has better anti-aging properties. [ABSTRACT FROM AUTHOR]

In order to study the freeze-thaw splitting performance of basalt fiber asphalt mixture under different conditions, the specimens with basalt fiber were prepared and the freeze-thaw splitting performance of specimens under different conditions were tested and analyzed. Results show that basalt fiber can improve the freeze-thaw splitting performance of asphalt mixture, and can also enhance the toughness of asphalt mixture under ultraviolet aging and freeze-thaw cycles, thermo-oxidative aging and freeze-thaw cycles. When the dosage of basalt fiber is 0.60%, the splitting strength of asphalt mixture decreases by 0.52%, 14.47%, 21.45%, 31.78% respectively under four freeze-thaw cycles compared that without aging condition, freeze-thaw and basalt fiber. Under four freeze-thaw cycles and ultraviolet aging conditions, the splitting strength of asphalt mixture decreases by 5.94%, 19.64%, 27.65%, 39.28% compared that without aging condition, freeze-thaw and basalt fiber, respectively. Under UV aging and non-freezing-thawing conditions, the splitting strength of asphalt mixture with 0.60% basalt fiber content increases by 3.88% compared with that without aging condition, freeze-thaw and basalt fiber. Under thermo-oxidative aging and without freeze-thaw, the splitting strength of asphalt mixture with 0.6% basalt fiber increases by 1.29% compared with that without aging condition, freeze-thaw and basalt fiber, respectively. Under UV aging, thermo-oxidative and without freeze-thaw, the stiffness modulus of asphalt mixture with 0.6% basalt fiber increases by 1.01% and 10.23% compared with that without aging condition and without freeze-thaw. [ABSTRACT FROM AUTHOR]