Spatiotemporal changes of eutrophication and heavy metal pollution
Por um escritor misterioso
Descrição
Pollution in inflow rivers seriously endangers the water environment in downstream lakes. In this study, an inflow river system of the Baiyangdian–Fuhe river system (FRS) was investigated to display timely pollution patterns of eutrophication and heavy metals after the establishment of Xiongan New Area, aiming to reveal the weak parts in current pollution treatments and guide the further water quality management. The results showed that the pollution of eutrophication was worse than the heavy metals in FRS, with serious eutrophic parameters of ammonia nitrogen (NH4+-N) and chemical oxygen demand (COD). There were greatly spatiotemporal variations of the pollution in FRS. (1) Concentrations of NH4+-N and total phosphorus were all higher in summer and autumn, whereas, COD contents were higher in spring; the water quality index (WQI) of eutrophication linearly increased along FRS in summer and autumn, with pollution hotspots around the estuary area. (2) The pollution levels of plumbum exceeded cadmium (Cd) and chromium (Cr) but without strongly spatiotemporal changes; however, Cd and Cr in the town area and Cd in spring showed higher concentrations; the WQI of heavy metals showed single peak curves along FRS, with significantly higher values around the town area. Additionally, the four potential pollution sources: domestic sewage, traffic pollution, agricultural wastewater and polluted sediments were identified based on the pollution patterns and pollutant associations. These findings demonstrated current treatments failed to eliminate the pollution in some hotspots and periods, and the in-depth understanding of the pollution spatiotemporal patterns in this study, especially the pollution hotspots, serious periods and potential sources, are crucial to furtherly develop spatiotemporally flexible pollution treatment strategies.
Spatio-temporal evolution of eutrophication and water quality in the Turawa dam reservoir, Poland
Water, Free Full-Text
The Heavy metal Pollution Index in different hydrological seasons.
Spatiotemporal changes of eutrophication and heavy metal pollution in the inflow river system of Baiyangdian after the establishment of Xiongan New Area [PeerJ]
A century of human-induced environmental changes and the combined roles of nutrients and land use in Lake Victoria catchment on eutrophication - ScienceDirect
Current knowledge from heavy metal pollution in Chinese smelter contaminated soils, health risk implications and associated remediation progress in recent decades: A critical review - ScienceDirect
Historical trends of heavy metal contamination and eutrophication in an aquatic system from Kashmir Himalaya, India - ScienceDirect
A novel assessment considering spatial and temporal variations of water quality to identify pollution sources in urban rivers
Relationships between the heavy metal pollution, environmental factors
Water, Free Full-Text
Eutrophication Increases Phytoplankton Methylmercury Concentrations in a Coastal Sea—A Baltic Sea Case Study
Distribution of heavy metals in sediments with respect to TEC/PEC
Water, Free Full-Text
Comparison of spatiotemporal burial and contamination of heavy metals in core sediments of two plateau lakes with contrasting environments: implication for anthropogenic-driven processes
Historical trends of heavy metal contamination and eutrophication in an aquatic system from Kashmir Himalaya, India - ScienceDirect