Urban landscapes and legacy industry provide hotspots for riverine greenhouse gases: A source-to-sea study of the River Clyde

Water Research, Journal Year: 2023, Volume and Issue: 236, P. 119969 - 119969

Published: April 12, 2023

There is growing global concern that greenhouse gas (GHG) emissions from water bodies are increasing because of interactions between nutrient levels and climate warming. This paper investigates key land-cover, seasonal hydrological controls GHGs by comparison the semi-natural, agricultural urban environments in a detailed source-to-sea study River Clyde, Scotland. Riverine GHG concentrations were consistently oversaturated with respect to atmosphere. High riverine methane (CH4) primarily associated point source inflows wastewater treatment, abandoned coal mines lakes, CH4-C 0.1 - 44 µg l-1. Concentrations carbon dioxide (CO2) nitrous oxide (N2O) mainly driven nitrogen concentrations, dominated diffuse inputs upper catchment supplemented lower catchment, CO2-C 2.6 mg l-1 N2O-N 0.3 3.4 A significant disproportionate increase all occurred environment summer, compared semi-natural environment, where higher winter. change patterns points anthropogenic impacts on microbial communities. The loss total dissolved carbon, estuary approximately 48.4 ± 3.6 Gg C yr-1, annual inorganic export double organic four times CO2, CH4 accounting for 0.03%, impact disused accelerating DIC loss. 4.03 0.38 N yr-1 which N2O represents 0.06%. improves our understanding generation dynamics can contribute knowledge their release It identifies action could support reductions aquatic emission.

Language: Английский

---

Fe(0)-Dissimilatory Nitrate Reduction to Ammonium for Autotrophic Recovery of Reactive Nitrogen

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(45), P. 17353 - 17362

Published: Nov. 2, 2023

Bioreduction of nitrate to value-added ammonium is a potentially sustainable strategy recycle nutrients from wastewater. Here, we have proven the feasibility reduction autotrophic with electrons extracted Fe(0). Using Geobacter-dominated anodic biofilm as an inoculum, achieved nitrate-to-ammonium efficiency up 90 ± 3% rate 35 1.3 mg N/d/L. An electron acceptor instead inoculum greatly influenced Fe(0)-dissimilatory (DNRA), where nitrite provided effective selective pressure enrich Geobacter initial 5 56%. The DNRA repressing denitrification was demonstrated by reverse tendencies upregulated nrfA and downregulated nirS gene transcription. This finding provides new route for removal recycling water, which has broader implication on biogeochemical nitrogen iron cycling.

Language: Английский

---

Simultaneous removal of ammonium ions and sulfamethoxazole by ozone regenerated high silica zeolites

Water Research, Journal Year: 2020, Volume and Issue: 188, P. 116472 - 116472

Published: Sept. 29, 2020

Continuous development of industry and civilization has led to changes in composition, texture toxicity waste water due the wide range pollutants being present. Considering that conventional wastewater treatment methods are insufficient for removing micropollutants nutrients a high level, other, alternative, should be used polish plant effluents. In this study we developed an polishing concept removal ammonium could potentially incorporated existing plants. We demonstrated method use silica MOR zeolite granules as adsorbent simultaneous micropollutant sulfamethoxazole (SMX) (NH4+) ions from aqueous solutions. At initial NH4+ concentration 10 mg/L mordenite (MOR) removed 0.42 mg/g NH4+, similar obtained by commonly natural Zeolita (0.44 mg/g). However, at higher concentrations performed better. addition, Langmuir isotherm model showed maximum adsorption capacity (qmax, 4.08 mg/g), which was about two times than (2.11). The towards SMX, both low (2 µg/L) (50 mg/L) concentrations, even increased presence ions. regenerated with ozone reused consecutive adsorption–regeneration cycles marginal decrease total capacity.

Language: Английский

---

Resilience and life cycle assessment of ion exchange process for ammonium removal from municipal wastewater

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 783, P. 146834 - 146834

Published: March 30, 2021

Language: Английский

---

Economic analysis of the scale-up and implantation of a hollow fibre membrane contactor plant for nitrogen recovery in a full-scale wastewater treatment plant

Separation and Purification Technology, Journal Year: 2021, Volume and Issue: 275, P. 119128 - 119128

Published: June 12, 2021

Language: Английский

---