Spatial and temporal distribution characteristics of different forms of inorganic nitrogen in three types of rivers around Lake Taihu, China

Abstract

In order to control nitrogen (N) pollution of Lake Taihu, China, we studied the spatial and temporal distribution characteristics of inorganic N in inflowing rivers polluted by industry, agriculture, and domestic sewage during low, moderate, and high flow periods. The results showed that dissolved total nitrogen (DTN) was the main fraction of total nitrogen (TN) input from these rivers. Inflowing rivers had distinct impacts on TN, DTN, ammonium N (NH 4 + ), and nitrate N (NO 3 − ) concentrations of Lake Taihu during the low flow period. Particulate nitrogen (PN) had an impact on Lake Taihu during the three flow periods and all the three types of rivers would increase PN concentration in the lake. Rivers polluted by agriculture had the greatest impact on Lake Tai hu's TN, DTN, NO 3 − , and dissolved inorganic N (DIN) concentrations, while rivers polluted by industry had the greatest impact on NH 4 + concentration. Therefore, agriculture and industry should be key targets for nutrient reductions. The in-lake N concentrations were higher than those of inflowing rivers during moderate and high flow periods.

Bio-Based Adsorption as Ecofriendly Method for Wastewater Decontamination: A Review

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Impact of Hijlan Creek springs on water quality of the Euphrates River and the hydrochemical characterization of the contamination plumes

“…Contamination of the rivers is one of the greatest challenges facing the new world, which is creating an unsettling situation. Increased human activities and natural resources (groundwater and spring water) flowing into rivers make it necessary to evaluate the current water quality of rivers and predict potential improvements (Gao et al, 2019;Fregoso-López et al, 2020). The water quality indexes may be divided into specified indicators, public indicators, planning and designing indicators, and statistical indicators.…”