[Transition of Food Consumption Patterns and Carbon Footprint of Urban and Rural Residents in China].

The food system is an important source of greenhouse gas emissions, and the carbon footprint analysis of food consumption under the dual carbon background is of great significance for the sustainable development of the food system. To reveal the differences in food consumption patterns and carbon footprints between urban and rural residents in China, the life cycle carbon emission coefficient method was used to measure the direct carbon emissions of food consumption by urban and rural residents in China from 2000 to 2021. From the perspective of carbon footprint composition, the following main conclusions were drawn： ① The structure of food consumption among residents in China shifted from predominantly plant-based to a balanced consumption of both plant- and animal-based foods, reducing the disparity in various food consumption quantities between urban and rural residents.

[Stability of C60 nanoparticles in aquatic systems].

The influences of storage time, pH, electrolytes and organic matters on the stability of two different suspensions of C60 nanoparticles were investigated. The results showed that the C60 nanoparticles prepared by solvent substitution (C60/son) were more stable than that prepared by prolonged stirring (C60/aq), and kept stable for a period of time. Higher pH enhanced the stability of C60 nanoparticles.

Influence of diatomite addition on membrane fouling and performance in a submerged membrane bioreactor.

This paper examined the effect of diatomite addition on membrane fouling and process performance in an anoxic/oxic submerged membrane bioreactor (A/O MBR). Particle size distribution, molecular weight distribution and microbial activity have been investigated to characterize the sludge mixed liquor. Results show that diatomite addition is a reliable and effective approach in terms of both membrane fouling mitigation and pollutants removal improvement.

[Variations of biological stability and disinfection byproduct in water distribution systems and their correlations].

Variations of assimilable organic carbon (AOC), trihalomethanes (THMs) and haloacetic acids (HAAs) in two different water distribution systems (DSs) were investigated in Shanghai, a eastern city of China. Correlations of drinking water biological stability and disinfection byproduct were analyzed. The results show that AOC and HAAs are varied based on chlorine residual and microbial activity.