Pollution reduction and operating cost analysis of municipal wastewater treatment in China and implication for future wastewater management

Journal of Cleaner Production, Journal Year: 2020, Volume and Issue: 253, P. 120003 - 120003

Published: Jan. 7, 2020

Language: Английский

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The Hidden Impacts of Phosphorus Pollution to Streams and Rivers

BioScience, Journal Year: 2020, Volume and Issue: 70(4), P. 315 - 329

Published: Feb. 7, 2020

Abstract Phosphorus (P) enrichment to streams, lakes, and estuaries is increasing throughout the United States. P loading typically viewed from a harmful algal bloom perspective; if added causes excess growths of phytoplankton or macroalgae, it may become targeted for control. However, also contributes two other non–algae-based aquatic problems. Field experimental evidence shows that directly stimulates growth bacteria, which can increase concentrations exert significant biochemical oxygen demand on water bodies, contributing hypoxia, widespread impairment. Experimental demonstrates fecal bacterial be significantly stimulated by loading, health risks through exposure consumption contaminated shellfish causing economic losses beach area closures. Resource managers need look beyond stimulation should consider broader roles have ecosystem function microbiological safety humans.

Language: Английский

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Blue Waters, Green Bottoms: Benthic Filamentous Algal Blooms Are an Emerging Threat to Clear Lakes Worldwide

BioScience, Journal Year: 2021, Volume and Issue: 71(10), P. 1011 - 1027

Published: March 27, 2021

Abstract Nearshore (littoral) habitats of clear lakes with high water quality are increasingly experiencing unexplained proliferations filamentous algae that grow on submerged surfaces. These algal blooms (FABs) sometimes associated nutrient pollution in groundwater, but complex changes climate, transport, lake hydrodynamics, and food web structure may also facilitate this emerging threat to lakes. A coordinated effort among members the public, managers, scientists is needed document occurrence FABs, standardize methods for measuring their severity, adapt existing data collection networks include nearshore habitats, mitigate reverse profound structural change ecosystems. Current models eutrophication do not explain littoral greening. However, a cohesive response it essential protecting some world's most valued flora, fauna, ecosystem services they sustain.

Language: Английский

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Phosphorus Inventory for the Conterminous United States (2002–2012)

Journal of Geophysical Research Biogeosciences, Journal Year: 2021, Volume and Issue: 126(4)

Published: March 15, 2021

Published reports suggest efforts designed to prevent the occurrence of harmful algal blooms and hypoxia by reducing non-point point source phosphorus (P) pollution are not delivering water quality improvements in many areas. Part uncertainty evaluating watershed responses management practices is lack standardized estimates inputs outputs. To assess P trends across conterminous United States, we compiled an inventory using publicly available datasets agricultural fluxes, atmospheric deposition, human demand waste, discharges for 2002, 2007, 2012 at scale 8-digit Hydrologic Unit Code subbasin (~1,800 km2). Estimates legacy surplus accumulated from 1945 2001 were also developed. Fertilizer manure found exceed crop removal rates up 50% regions. This excess has led continued accumulation lands. Atmospheric deposition increased throughout Rockies, potentially contributing reported increases surface concentrations undisturbed watersheds. In some urban areas, fluxes associated with waste non-farm fertilizer use declined despite population growth, likely due, part, various sales bans on P-containing detergents fertilizers. Although regions individual subbasins have different contemporary sources, a method accounting large small ready numbers provide essential infromation coordinate targeted interventions reduce nation's waters.

Language: Английский

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Assemblage-based biomonitoring of freshwater ecosystem health via multimetric indices: A critical review and suggestions for improving their applicability

Water Biology and Security, Journal Year: 2022, Volume and Issue: 1(3), P. 100054 - 100054

Published: May 29, 2022

Freshwater biota are more comprehensive and direct indicators of biological impacts, meaningful to the public than water quality or physical habitat surrogates. biotic data multiple developed from them offer a much richer array for assessing impacts pollution controls limited set chemical measures. In recent decades, assemblage-based assessments by ecologists, environmental scientists, agencies have been employed globally determining condition of, threats to, freshwater ecosystems. A key step in this advance has development multimetric indices (MMIs) integrity (IBIs) based on quantitative algae, macrophyte, macroinvertebrate, fish riparian bird assemblages. Europe, where assemblages mandated ecosystem health, many multimetric. However, proliferation MMIs not always occurred through application rigorous study designs monitoring protocols, nor they effectively incorporated functional metrics, stressor assessments, statistical analyses. Therefore, review, we discuss eleven major concerns with (including logistical limitations) encourage widely applicable (transferable) MMI use implementation. Specifically, our focus reference conditions; sampling effort, methods, season; trophic guild definition; metric comprehensiveness, options, screening scoring; validation. could also benefit increased attention ecological mechanisms development, further improve understanding anthropogenic as well rehabilitation effects ecosystems globally. Paying closer designs, should better facilitate degraded ecosystems, aiding conservation healthy

Language: Английский

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