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1. Insights into the mechanism of the deterioration of mainstream partial nitritation/anammox under low residual ammonium

Author:
Yandong Yang; Yiming Jiang; Yanan Long; Jiarui Xu; Changqing Liu; Liang Zhang; Yongzhen Peng
Source:
Journal of environmental sciences (China) 2023 v.126 pp. 29-39
ISSN:
1001-0742
Subject:
dissolved oxygen,   etc   ; ammonia; ammonium; anaerobic ammonium oxidation; nitrites; oxidants; oxidation; sludge; China;     Show all 9 Subjects
Abstract:
... Residual ammonium is a critical parameter affecting the stability of mainstream partial nitritation/anammox (PN/A), but the underlying mechanism remains unclear. In this study, mainstream PN/A was established and operated with progressively decreasing residual ammonium. PN/A deteriorated as the residual ammonium decreased to below 5 mg/L, and this was paralleled by a significant loss in anammox ac ...
DOI:
10.1016/j.jes.2022.04.005

2. Graphitized Cu-β-cyclodextrin polymer driving an efficient dual-reaction-center Fenton-like process by utilizing electrons of pollutants for water purification

Author:
Weixiang Liao; Lai Lyu; Di Wang; Chun Hu; Tong Li
Source:
Journal of environmental sciences (China) 2023 v.126 pp. 565-574
ISSN:
1001-0742
Subject:
dissolved oxygen,   etc   ; carbon; catalysts; catalytic activity; energy; polymers; wastewater treatment; water purification; China;     Show all 9 Subjects
Abstract:
... Excessive consumption of energy and resources is a major challenge in wastewater treatment. Here, a novel heterogeneous Fenton-like catalyst consisting of Cu-doped graphene-like catalysts (Cu-GCD NSs) was first synthesized by an enhanced carbothermal reduction of β-cyclodextrin (β-CD). The catalyst exhibits excellent Fenton-like catalytic activity for the degradation of various pollutants under ne ...
DOI:
10.1016/j.jes.2022.05.022

3. Effect of dissolved oxygen on methane production from bottom sediment in a eutrophic stratified lake

Author:
Yasuyuki Maruya; Keisuke Nakayama; Masafumi Sasaki; Katsuaki Komai
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 61-72
ISSN:
1001-0742
Subject:
dissolved oxygen,   etc   ; cold; eutrophication; lakes; mathematical models; methane; methane production; sediments; sulfates; uncertainty; China;     Show all 11 Subjects
Abstract:
... Clarifying the role of sulfate and dissolved oxygen (DO) in methane production may allow for precise and accurate modeling of methane emissions in eutrophic lakes. We conducted field observations of sulfate, methane, and DO concentrations in Lake Abashiri, a typical brackish and eutrophic lake in a cold region, to develop a DO-based method for quantitively estimating methane production in a eutrop ...
DOI:
10.1016/j.jes.2022.01.025

4. A convenient and economical strategy for multiple-target electrochemiluminescence detection using peroxydisulfate solution

Author:
Mei-Ling Liu; Xiao-Jing He; Yi Li; Mei-Ling Zhao; Ying Zhuo
Source:
Talanta 2023 v.251 pp. 123788
ISSN:
0039-9140
Subject:
dissolved oxygen,   etc   ; aptasensors; carbon nanotubes; catalytic activity; electrochemiluminescence; glucose; glucose oxidase; nanogold; oligonucleotides; peroxidase; sulfates; thrombin;     Show all 12 Subjects
Abstract:
... As various aptasensors are adopted in clinical diagnosis, the development of convenient multiple-target determination is a field of ever-increasing interests. Herein, a label-free and amplified electrochemiluminescence (ECL) sensing platform was constructed to detect multiple targets of hemin, glucose and thrombin (TB) using peroxydisulfate (S₂O₈²⁻) solution, which was one of the most convenient a ...
DOI:
10.1016/j.talanta.2022.123788

5. A standalone photovoltaic/battery energy-powered water quality monitoring system based on narrowband internet of things for aquaculture: Design and implementation

Author:
Chaowanan Jamroen; Nontanan Yonsiri; Thitiworada Odthon; Natthakun Wisitthiwong; Sutawas Janreung
Source:
Smart agricultural technology 2023 v.3 pp. 100072
ISSN:
2772-3755
Subject:
dissolved oxygen,   etc   ; Internet; aquaculture; batteries; electric power; energy; hydrogen; salinity; solar energy; temperature; turbidity; water quality; Thailand;     Show all 13 Subjects
Abstract:
... This study presents a standalone photovoltaic (PV)/battery energy storage (BES)-powered water quality monitoring system based on the narrowband internet of things (NB-IoT) for aquaculture. (1) A PV/BES system was used as the main energy system of the monitoring system. The PV and BES capacities were optimized to provide uninterrupted electrical energy to the monitoring system, taking into account ...
DOI:
10.1016/j.atech.2022.100072

6. New method for calibrating optical dissolved oxygen sensors in seawater based on an intelligent learning algorithm

Author:
Ying Zhang; Yingying Zhang; Da Yuan; Yunyan Zhang; Bingwei Wu; Xiandong Feng
Source:
Environmental monitoring and assessment 2022 v.194 no.1 pp. 39
ISSN:
0167-6369
Subject:
dissolved oxygen,   etc   ; algorithms; calibration; luminescence; oxygen; seawater;     Show all 6 Subjects
Abstract:
... Oxygen sensors based on luminescence quenching are the most commonly used instruments for in situ measurement in seawater due to their accuracy and long-term stability. The calibration method of the sensor is crucial for their accuracy. Conventional methods exhibit some defects, such as strict control of calibration conditions and cumbersome and time-consuming operation. To improve calibration ope ...
DOI:
10.1007/s10661-021-09592-z

7. In-situ aeration-assisted polydopamine/polyethyleneimine copolymerization and deposition for rapid and uniform membrane modification

Author:
Qingying Zhou; Sihua Liu; Jingguo She; Xuan Wang; Xiaolong Lu; Chunrui Wu
Source:
Journal of membrane science 2022 v.657 pp. 120662
ISSN:
0376-7388
Subject:
dissolved oxygen,   etc   ; copolymerization; hydrophilicity; mussels; permeability; polyethyleneimine; porosity;     Show all 7 Subjects
Abstract:
... The key to membrane separation technology is to enhance membrane selectivity while ensuring high permeability. The modification of polydopamine (PDA) deposition based on mussel bionics is an important method to prepare hydrophilic membranes, in which the slow PDA deposition rate and nonuniformity are the keys to the strategy. In this work, a novel in-situ aeration-assisted PDA/PEI copolymerization ...
DOI:
10.1016/j.memsci.2022.120662

8. Dissolved oxygen drives the environmental behavior of heavy metals in coastal sediments

Author:
Xiaozhu Liu; Yanqing Sheng; Qunqun Liu; Ming Jiang
Source:
Environmental monitoring and assessment 2022 v.194 no.4 pp. 297
ISSN:
0167-6369
Subject:
dissolved oxygen,   etc   ; estuaries; heavy metals; risk; risk assessment; sulfides;     Show all 6 Subjects
Abstract:
... In this study, the impacts of dissolved oxygen (DO) on dynamics concentrations of heavy metals (Cu, Cd, Cr, and Pb) from estuary sediments were investigated in a 49-day laboratory simulation. The exchange flux method, Bureau Communautaire de Référence (BCR) sequential extraction procedure, and risk assessment code (RAC) were used to analyze the behavior of heavy metals. The results indicated that ...
DOI:
10.1007/s10661-022-09975-w

9. Long-term performance of a full-scale intermittently decanted extended aeration (IDEA) plant: The effect of dissolved oxygen and the relocation of alum dosing to bioselector

Author:
Shaokun Song; Ka Yu Cheng; Beatrice Yong; Maneesha P. Ginige
Source:
Journal of environmental management 2022 v.302 pp. 113915
ISSN:
0301-4797
Subject:
dissolved oxygen,   etc   ; aeration; alum; environmental management; overdose; phosphorus; wastewater;     Show all 7 Subjects
Abstract:
... Dosing alum to remove phosphorus (P) from wastewater is a common practice. However, the dosing-location and quantity of alum required to meet P discharge limits are vaguely defined. As such, utilities overdose alum to avoid noncompliance, but this leads to wastage and costs. This study aimed to address this issue through a long-term evaluation of an alum-assisted full-scale intermittently decanted ...
DOI:
10.1016/j.jenvman.2021.113915

10. A spatio-temporal LSTM model to forecast across multiple temporal and spatial scales

Author:
Fearghal O'Donncha; Yihao Hu; Paulito Palmes; Meredith Burke; Ramon Filgueira; Jon Grant
Source:
Ecological informatics 2022 v.69 pp. 101687
ISSN:
1574-9541
Subject:
dissolved oxygen,   etc   ; data collection; models; temperature; time series analysis;     Show all 5 Subjects
Abstract:
... This paper presents a novel spatio-temporal LSTM (SPATIAL) architecture for time series forecasting applied to environmental datasets. The framework was applied for three different ocean datasets: current speed, temperature, and dissolved oxygen. Network implementation proceeded in two directions that are nominally separated but connected as part of a natural environmental system – across the spat ...
DOI:
10.1016/j.ecoinf.2022.101687

11. Calibration of a complex hydro-ecological model through approximate Bayesian computation and random forest combined with sensitivity analysis

Author:
Francesco Piccioni; Céline Casenave; Meïli Baragatti; Bertrand Cloez; Brigitte Vinçon-Leite
Source:
Ecological informatics 2022 pp. 101764
ISSN:
1574-9541
Subject:
dissolved oxygen,   etc   ; Bayesian theory; algorithms; automation; chlorophyll; lakes; models; France;     Show all 8 Subjects
Abstract:
... An automated calibration method is proposed and applied to the complex hydro-ecological model Delft3D-BLOOM which is calibrated from monitoring data of the lake Champs-sur-Marne, a small shallow urban lake in the Paris region (France). This method (ABC-RF-SA) combines Approximate Bayesian Computation (ABC) with the machine learning algorithm Random Forest (RF) and a Sensitivity Analysis (SA) of th ...
DOI:
10.1016/j.ecoinf.2022.101764

12. Mn2O3/Mn3O4-Cu1.5Mn1.5O4 spinel as an efficient Fenton-like catalyst activating persulfate for the degradation of bisphenol A: Superoxide radicals dominate the reaction

Author:
Yihong Zhu; Zijing Sun; Yun Deng; Fudong Liu; Wenquan Ruan; Lijuan Xie
Source:
Science of the total environment 2022 v.839 pp. 156075
ISSN:
0048-9697
Subject:
dissolved oxygen,   etc   ; bisphenol A; catalysts; environment; mineralization; oxygen; remediation; synergism;     Show all 8 Subjects
Abstract:
... In this work, a Mn₂O₃/Mn₃O₄-Cu₁.₅Mn₁.₅O₄ spinel was fabricated and utilised as a catalyst to activate peroxydisulfate (PDS) leading to degradation of bisphenol A (BPA). The results showed that the system exhibited an excellent turnover frequency (TOF) of 2.7 × 10⁻³ s⁻¹ and high stability. The amount of ion leaching was small and the degree of mineralisation was up to 66.2%. Superoxide radicals (O₂ ...
DOI:
10.1016/j.scitotenv.2022.156075

13. Influences of granule properties on the performance of autotrophic nitrogen removal granular reactor: A model-based evaluation

Author:
Xueming Chen; Jinzhong Liu; Pengfei Huo; Fuyi Li; Linyan Yang; Wei Wei; Bing-Jie Ni
Source:
Bioresource technology 2022 v.356 pp. 127307
ISSN:
0960-8524
Subject:
dissolved oxygen,   etc   ; anaerobic ammonium oxidation; diffusivity; nitrogen; technology; total nitrogen;     Show all 6 Subjects
Abstract:
... This work studied the impacts of key granule properties on the granular reactor performing partial nitritation/anammox from the modeling perspective. The results could guide not only future reliable modeling but also practical startup/operation of the reactor. To achieve high total nitrogen (TN) removal whilst avoiding significant N₂O production, inoculated granules should be big and anammox-enric ...
DOI:
10.1016/j.biortech.2022.127307

14. Role of salinity and aeration on flocculation and remobilization of metals during estuarine mixing

Author:
Touraj Nasrabadi; Arash Esmaeili Soodarjani; Abdolreza Karbassi; Majid Baghdadi
Source:
Environmental earth sciences 2022 v.81 no.10 pp. 277
ISSN:
1866-6280
Subject:
dissolved oxygen,   etc   ; aeration; estuaries; flocculation; fractionation; liquids; river water; salinity;     Show all 8 Subjects
Abstract:
... Multiple parameters may affect the fate of metals between solid and liquid phases in estuarine zones. The present investigation brings out the roles of salinity and dissolved oxygen (DO) in flocculation of colloidal metals and their subsequent remobilization during estuarine mixing. For this purpose, a series of aquaria containing river water with different salinity regimes under both natural and ...
DOI:
10.1007/s12665-022-10413-w

15. Higher dissolved oxygen levels promote downward migration of phosphorus in the sediment profile: Implications for lake restoration

Author:
Zhanling Wang; Changhui Wang; Helong Jiang; Huan Liu
Source:
Chemosphere 2022 v.301 pp. 134705
ISSN:
0045-6535
Subject:
dissolved oxygen,   etc   ; lakes; organic matter; phosphorus; sediment-water interface; sediments;     Show all 6 Subjects
Abstract:
... Lake restoration (typically sediment dredging) commonly involves producing a new sediment-water interface (SWI). This study comprehensively investigated the migration and transformation of P during the formation of a new SWI under different dissolved oxygen (DO) levels in the overlying water, based on Fe/Al-rich sediment. The results suggest that DO had a profound effect on the 0–7 cm sediment lay ...
DOI:
10.1016/j.chemosphere.2022.134705

16. High efficient bio-denitrification of nitrate contaminated water with low ammonium and sulfate production by a sulfur/pyrite-based bioreactor

Author:
Xiaoyu Chen; Lei Yang; Fei Chen; Qinan Song; Chuanping Feng; Xiang Liu; Miao Li
Source:
Bioresource technology 2022 v.346 pp. 126669
ISSN:
0960-8524
Subject:
dissolved oxygen,   etc   ; Proteobacteria; ammonia; ammonium; bioreactors; denitrification; nitrates; pyrite; sulfates; sulfur;     Show all 10 Subjects
Abstract:
... Sulfur-based autotrophic denitrification (SAD) and pyrite-based autotrophic denitrification (PAD) are important technologies that address nitrate pollution, but high sulfate production and low denitrification efficiency, respectively, limit their application in engineering. A bio-denitrification reactor with sulfur and pyrite as filler materials was studied to remove NO₃–-N from nitrate contaminat ...
DOI:
10.1016/j.biortech.2021.126669

17. Successful startup of the single-stage PN-A (partial nitrification-anammox) process by controlling the oxygen supply

Author:
Lianze Yu; Chi Zhang; Miao Zhang; Lintang Yu; Penglan Huang; Jingjing Pang; Jun Wu
Source:
Environmental science and pollution research 2022 v.29 no.24 pp. 36763-36772
ISSN:
0944-1344
Subject:
dissolved oxygen,   etc   ; ammonium; cost effectiveness; liquids; nitrogen; oxygen; research; simulation models;     Show all 8 Subjects
Abstract:
... The single PN-A (partial nitrification-anammox) reactor offers a cost-effective solution for nitrogen removal. However, optimal control of the PN-A reactor is challenging due to the interactive mechanisms among the oxygen supply, bulk liquid DO (dissolved oxygen) concentration, and the balance of various functional bacterial species. In this study, a mathematical model was used to derive the optim ...
DOI:
10.1007/s11356-022-18645-w

18. A new control strategy to improve the mass transfer capacity and reduce air injection costs in raceway reactors

Author:
Marta Barceló-Villalobos; Ángeles Hoyo; Enrique Rodríguez-Miranda; José Luis Guzmán; Francisco Gabriel Acién
Source:
New biotechnology 2022 v.70 pp. 49-56
ISSN:
1871-6784
Subject:
dissolved oxygen,   etc   ; air; air flow; algae culture; algorithms; mass transfer; photobioreactors;     Show all 7 Subjects
Abstract:
... Raceway reactors are still the most extensive technology for microalgae production. However, these reactors have some drawbacks, one of them being a low mass transfer capacity, which provokes dissolved oxygen accumulation and thus reduction of system performance. To overcome this problem, it is imperative to improve the photobioreactor design as well as the operating conditions. One solution is to ...
DOI:
10.1016/j.nbt.2022.04.005

19. Short and long term continuous hydroxylamine feeding in a granular sludge partial nitritation reactor

Author:
Aina Soler-Jofra; Lisbeth Schmidtchen; Lluc Olmo; Mark C.M. van Loosdrecht; Julio Pérez
Source:
Water research 2022 v.209 pp. 117945
ISSN:
0043-1354
Subject:
dissolved oxygen,   etc   ; Nitrosomonas; ammonium; hydroxylamine; nitrification; nitrites; nitrogen; research; sludge; water;     Show all 10 Subjects
Abstract:
... Hydroxylamine is a nitrogen intermediate of ammonium oxidizing bacteria (AOB) that can transiently accumulate during nitrification. The impact of hydroxylamine on aerobic ammonium oxidations is still obscure. In the present study the short and long term impact of hydroxylamine on partial nitritation granular sludge was investigated. Dissolved oxygen was the governing factor determining the hydroxy ...
DOI:
10.1016/j.watres.2021.117945

20. Long-term exposure to an extreme environment induces species-specific responses in corals’ photosynthesis and respiration rates

Author:
Juliette Jacquemont; Fanny Houlbrèque; Clément Tanvet; Riccardo Rodolfo-Metalpa
Source:
Marine biology 2022 v.169 no.6 pp. 82
ISSN:
0025-3162
Subject:
dissolved oxygen,   etc   ; chlorophyll; chronic exposure; corals; endosymbionts; photosynthesis; seawater; New Caledonia;     Show all 8 Subjects
Abstract:
... Extreme reef environments have become useful natural laboratories to investigate physiological specificities of species chronically exposed to future-like climatic conditions. The lagoon of Bouraké in New Caledonia (21°56′56.16′′ S; 125°59′36.82′′ E) is one of the only reef environments studied where the three main climatic stressors predicted to most severely impact corals occur. In this lagoon, ...
DOI:
10.1007/s00227-022-04063-6