Twenty years of China's water pollution control: Experiences and challenges

A Comparison Study of the Nutrient Fluxes in a Newly Impounded Riverine Lake (Longjing Lake): Model Calculation and Sediment Incubation

“…Sediment incubation is a combination of multiple influencing factors to obtain fluxes, while the porewater model is based on molecular diffusion as the theoretical basis for obtaining fluxes. (2) In the management of autochthonous release from lakes, sediment incubation is recommended as a research tool when the main objective is to remove pollution, while the porewater model is recommended as a research tool when the main objective is to control pollution. (3) When assessing the diffusive flux of nitrogen, it is recommended to choose the stable form of total dissolved nitrogen to discuss the flux results.…”

“…Experimental sediments were taken from Longjinghu Lake, located in the center of Chongqing Garden Expo Park. The total water surface area of Longjing Lake is about 0.67 km 2 , and about 0.53 km 2 in the Chongqing Garden Park Expo, with a total reservoir capacity of 6.63 million m 3 and a regulating reservoir capacity of 4.25 million m 3 . There are two input rivers, Zhaojiaxi River (catchment area of 15 km 2 ) and Longjingguo River (catchment area of 5 km 2 ), providing sufficient water to Longjinghu Lake for the management and irrigation of the park landscape.…”

“…Nutrient release from sediments plays an important role in ecosystem cycles and was a major source of substrates for primary productivity in aquatic systems [1,2]. In several shallow lakes, autochthonous nutrients contributed to a large proportion of the summer bloom outbreak [3,4], acting as the main factor controlling primary lake productivity in global eutrophication studies.…”

“…Here, samples of five sediments were collected and then further estimated by laboratory incubation for flux. The experimental objectives are: (1) To quantify the main nutrient sources using sediment incubations and estimate their contributions to lake nitrogen and phosphorus input, (2) to compare the results of the two studies and discuss the applicability of the two methods in the experiments. The results would validate the flux estimation for internal contribution and following management strategies.…”

Mn3O4 Catalysts for Advanced Oxidation of Phenolic Contaminants in Aqueous Solutions

“…One of the most severe environmental problems is water pollution. The limited availability of freshwater, which only accounts for 2.5% of the planet's water, faces water security threats that can affect 80% of the world's population [2]. The emerging contaminants (ECs), such as organic pollutants, pesticides, and pharmaceuticals, have been increased through the mismanagement of industrial wastewater.…”