U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Subject "phosphorus" Remove constraint Subject: "phosphorus"
Start Over

Search

50,506  Search Results

« Previous | 1 - 20 of 50,506 |
Number of results to display per page

Search Results

1. New insights into eutrophication management: Importance of temperature and water residence time

Author:
Zhao, Feng; Zhan, Xu; Xu, Hai; Zhu, Guangwei; Zou, Wei; Zhu, Mengyuan; Kang, Lijuan; Guo, Yulong; Zhao, Xingchen; Wang, Zicong; Tang, Wei
Source:
Journal of environmental sciences (China) 2022 v.111 pp. 229-239
ISSN:
1001-0742
Subject:
phosphorus,   etc   ; Cyanobacteria; climate; eutrophication; freshwater; humans; nitrogen; nitrogen fixation; nitrogen-fixing cyanobacteria; spectrometers; water quality; water temperature; China;     Show all 13 Subjects
Abstract:
... Eutrophication and harmful cyanobacterial blooms threaten water resources all over the world. There is a great controversy about controlling only phosphorus or controlling both nitrogen and phosphorus in the management of lake eutrophication. The primary argument against the dual nutrients control of eutrophication is that nitrogen fixation can compensate the nitrogen deficits. Thus, it is of grea ...
DOI:
10.1016/j.jes.2021.02.033

2. A review of biochemical diversity and metabolic modeling of EBPR process under specific environmental conditions and carbon source availability

Author:
Izadi, Parnian; Izadi, Parin; Eldyasti, Ahmed
Source:
Journal of environmental management 2021 v.288 pp. 112362
ISSN:
0301-4797
Subject:
phosphorus,   etc   ; carbon; glycogen; models; wastewater; wastewater treatment;     Show all 6 Subjects
Abstract:
... Enhanced biological phosphorus removal (EBPR) is one of the most promising technologies as an economical and environmentally sustainable technique for removal of phosphorus from wastewater (WW). However, with high capacity of EBPR, insufficient P-removal is a major yet common issue of many full-scale wastewater treatment plants (WWTP), due to misinterpreted environmental and microbial disturbance. ...
DOI:
10.1016/j.jenvman.2021.112362

3. Analysis of the Correlation between the Phytoplankton Development Level, Assessed by Chlorophyll a, and Nutrient Concentrations in Rybinsk Reservoir

Author:
Stepanova, I. E.
Source:
Biology bulletin of the Russian Academy of Sciences 2021 v.48 no.2 pp. 193-198
ISSN:
1062-3590
Subject:
phosphorus,   etc   ; chlorophyll; nitrogen; phytoplankton; total nitrogen;     Show all 5 Subjects
Abstract:
... A correlation analysis between chlorophyll a, nitrogen, and phosphorus compounds in Rybinsk Reservoir is carried out. During certain periods of the study, a significant correlation between chlorophyll a and inorganic nitrogen and phosphorus compounds is shown. The response of phytoplankton to the total nitrogen and phosphorus concentrations is evaluated. ...
DOI:
10.1134/S1062359021020114

4. Lead removal from water using organic acrylic amine fiber (AAF) and inorganic-organic P-AAF, fixed bed filtration and surface-induced precipitation

Author:
Wei, Jinshan; Duan, Lijie; Wei, Jian; Hoffmann, Erhard; Song, Yonghui; Meng, Xiaoguang
Source:
Journal of environmental sciences (China) 2021 v.101 pp. 135-144
ISSN:
1001-0742
Subject:
phosphorus,   etc   ; adsorption; filtration; lead; sorbents; China;     Show all 6 Subjects
Abstract:
... Granular porous sorbents were normally used for heavy metals removal from water. To search for the new commercial sorbent and treatment strategy, an organic acrylic amine fiber (AAF) and phosphorus loading inorganic-organic AAF (P-AAF) were prepared and used for lead (Pb) removal from water. A new strategy of inorganic-organic coupling technology was proposed for Pb removal, based on the hypothesi ...
DOI:
10.1016/j.jes.2020.08.009

5. Facile Construction of an Amino-1,3-Oxazine Scaffold using Burgess Reagent Under Mild Conditions

Author:
Fuchino, Kouki; Masui, Moriyasu; Yoshida, Shuhei; Kusakabe, Ken-ichi
Source:
Tetrahedron letters 2021 v.64 pp. 152684
ISSN:
0040-4039
Subject:
phosphorus pentoxide,   etc   ; cyclization reactions; moieties; synthesis;     Show all 4 Subjects
Abstract:
... The development of a cyclization reaction to access amino-1,3-oxazines under mild conditions is described. The synthesis was achieved using dehydrating reagents, such as phosphorus pentoxide and Burgess reagent. In particular, the cyclization with Burgess reagent proceeded under mild conditions and tolerated potentially labile functional groups, such as the acetoxy group, and therefore can be used ...
DOI:
10.1016/j.tetlet.2020.152684

6. Novel CaO2 beads used in the anaerobic fermentation of iron-rich sludge for simultaneous short-chain fatty acids and phosphorus recovery under ambient conditions

Author:
Ping, Qian; Zhang, Zhipeng; Dai, Xiaohu; Li, Yongmei
Source:
Bioresource technology 2021 v.322 pp. 124553
ISSN:
0960-8524
Subject:
phosphorus,   etc   ; acetates; fermentation; microbial communities; wastewater treatment;     Show all 5 Subjects
Abstract:
... A novel composite CaO₂ bead was prepared to improve total short-chain fatty acids (TSCFAs) production and phosphorus (P) recovery from iron-rich waste activated sludge (WAS) during ambient anaerobic fermentation. Results showed that CaO₂ mass percentage of 5% and CaCl₂:nylon66 = 1:1 (mass ratio) were the optimal prescription for the preparation of CaO₂ beads with porous structure, loose morphology ...
DOI:
10.1016/j.biortech.2020.124553

7. Nitrogen, Sulfur, and Phosphorus Codoped Hollow Carbon Microtubes Derived from Silver Willow Blossoms as a High-Performance Anode for Sodium-Ion Batteries

Author:
Yang, Dan; Li, Shaojun; Cheng, Dejian; Miao, Lei; Zhong, Weihao; Yang, Xiaoqing; Li, Zhenghui
Source:
Energy & fuels 2021 v.35 no.3 pp. 2795-2804
ISSN:
1520-5029
Subject:
phosphorus,   etc   ; anodes; carbon; carbonization; energy; silver; sodium;     Show all 7 Subjects
Abstract:
... Hard carbon materials have been considered as one of the most promising candidates as the anode in sodium-ion batteries. However, scale application of state-of-the-art hard carbon anodes is still hampered on account of their complicated, toxic, and time-consuming preparation techniques. In the present paper, silver willow blossoms composed of natural micrometer-scale fibers are employed to constru ...
DOI:
10.1021/acs.energyfuels.0c04258

8. How the integrated engineering solutions can support the lakes restoration?

Author:
Dunalska, Julita A.
Source:
International journal of ecohydrology & hydrobiology 2021 v.21 no.1 pp. 36-45
ISSN:
1642-3593
Subject:
phosphorus,   etc   ; ; eutrophication; hydrobiology; lakes; morphometry; oxygen; summer;     Show all 8 Subjects
Abstract:
... A method of the simultaneous reduction of external and internal load of phosphorus as a new solution for lake restoration is presented. A flow-through, stratified lake, with diverse morphometry was selected for the study. In all three parts of the lake, an oxygen deficit was noted at the lake bottom at peak summer stagnation, with a simultaneous increase in mineral forms of phosphorus (the concent ...
DOI:
10.1016/j.ecohyd.2020.06.004

9. Responses of microbial communities and their interactions to ibuprofen in a bio-electrochemical system

Author:
Zhu, Minghan; Zhang, Minglu; Yuan, Yibo; Zhang, Peilin; Du, Shuai; Ya, Tao; Chen, Daying; Wang, Xiaohui; Zhang, Tingting
Source:
Journal of environmental management 2021 v.289 pp. 112473
ISSN:
0301-4797
Subject:
phosphorus; total phosphorus,   etc   ; Firmicutes; Pseudomonas; Thiobacillus; ammonia; denitrification; environmental management; ibuprofen; microbial communities; nitrates; total nitrogen;     Show all 12 Subjects
Abstract:
... Ibuprofen has caused great concerns due to their potential environmental risks. However, their removal efficiency and their effects on microbial interactions in bio-electrochemical system remain unclear. To address these issues, a lab-scale bio-electrochemical reactor integrated with sulfur/iron-mediated autotrophic denitrification (BER-S/IAD) system exposing to 1000 μg L⁻¹ ibuprofen was operated ...
DOI:
10.1016/j.jenvman.2021.112473

10. Effects of irrigation schedules and phosphorus fertilizer rates on grain yield and quality of upland rice and paddy rice

Author:
Zhang, Yajie; Zhang, Wen; Wu, Ming; Liu, Gaosheng; Zhang, Zujian; Yang, Jianchang
Source:
Environmental and experimental botany 2021 v.186 pp. 104465
ISSN:
0098-8472
Subject:
phosphorus; phosphorus fertilizers,   etc   ; botany; grain yield; highlands; pollution; rough rice; viscosity;     Show all 8 Subjects
Abstract:
... With the shortage of water resources and environmental pollution caused by unreasonable fertilization, the research on water-nutrition interaction has become a hot topic. However, the synergistic effects of effects of phosphorus (P) application rates and irrigation schedules on grain yield and quality of paddy rice and upland rice were less studied. Field experiments were conducted on upland rice ...
DOI:
10.1016/j.envexpbot.2021.104465

11. Modelling phosphorus loading to the largest shallow lake in northern China in different shared socioeconomic pathways

Author:
Zhang, Xiaoxin; Yi, Yujun; Yang, Ying; Liu, Hongxi; Yang, Zhifeng
Source:
Journal of cleaner production 2021 v.297 pp. 126537
ISSN:
0959-6526
Subject:
phosphorus; total phosphorus,   etc   ; animal manures; eutrophication; lakes; models; oligotrophication; rivers; sewage systems; China;     Show all 10 Subjects
Abstract:
... Excessive nutrients inputs cause anthropogenic lake eutrophication worldwide. It is thus crucial to provide information on future trends of nutrient loading and its implications for the lake’s trophic state. Here we quantified total phosphorus (TP) loading to the Lake Baiyangdian (BYD), the largest shallow lake in northern China, and assessed their future trend and the trophic state of the lake. T ...
DOI:
10.1016/j.jclepro.2021.126537

12. Magnetic bio-activated carbons production using different process parameters for phosphorus removal from artificially prepared phosphorus-rich and domestic wastewater

Author:
Wen, Yuming; Zheng, Zhaoran; Wang, Shule; Han, Tong; Yang, Weihong; Jönsson, Pär Göran
Source:
Chemosphere 2021 v.271 pp. 129561
ISSN:
0045-6535
Subject:
phosphorus; total phosphorus,   etc   ; adsorption; carbon; carbonization; lignin; magnetism; magnetite; municipal wastewater; sewage treatment; sorption isotherms; steam;     Show all 12 Subjects
Abstract:
... A series of magnetic bio-activated carbon (MBAC) has been produced from lignin and ferrous salts following to the process including impregnation, carbonization, and steam activation. The influence of the impregnation methods and the steam flow rate on the quality and the maximum phosphorus adsorption capacity of the produced MBACs has been investigated. The phosphorus adsorption performance in rea ...
DOI:
10.1016/j.chemosphere.2021.129561

13. Performance and operational strategy of simultaneous nitrification, denitrification, and phosphorus removal system under the condition of low organic loading rate in wet weather

Author:
Li, Dong; Wei, Ziqing; Li, Shuai; Lao, Huimei; Wang, Wenqiang; Zeng, Huiping; Zhang, Jie
Source:
Chemosphere 2021 v.270 pp. 129464
ISSN:
0045-6535
Subject:
phosphorus; total phosphorus,   etc   ; aeration; batch systems; biomass; denitrification; municipal wastewater; nitrification; nitrogen; sludge; total nitrogen; weather;     Show all 12 Subjects
Abstract:
... A pilot-scale aerobic granular sequencing batch reactor (SBR) with domestic wastewater was operated to evaluate the effects of the low organic loading rate (OLR) due to wet weather flow conditions on simultaneous nitrification, denitrification, and phosphorus removal (SNDPR). As the OLR decreased from 0.85 to 0.43 kg COD m⁻³ d⁻¹, the total nitrogen (TN) and total phosphorus (TP) removal efficienci ...
DOI:
10.1016/j.chemosphere.2020.129464

14. Effects of phosphorus fertilizer application on phosphorus fractions in different organs of Cordia trichotoma

Author:
Kulmann, Matheus S. S.; Stefanello, Lincon O. S.; Schwalbert, Raí A.; Berghetti, Álvaro L. P.; Araujo, Maristela M.; Piccin, Rogerio; Gatiboni, Luciano C.; Tiecher, Tales; Ferreira, Paulo A. A.; Brunetto, Gustavo
Source:
Journal of forestry research 2021 v.32 no.2 pp. 725-732
ISSN:
1007-662X
Subject:
phosphorus; phosphorus fertilizers,   etc   ; Cordia trichotoma; DNA; RNA; fertilizer application; forestry; fractionation; lipids; phosphates; research; sandy soils;     Show all 12 Subjects
Abstract:
... The application of phosphorus (P) to soil can increase its availability to plants and alter P fractions in annual and perennial organs of Cordia trichotoma. If a portion of P accumulates in perennial organs in organic fractions it can be used in the next growth season, possibly decreasing plant dependence on P derived from soil fertilization. However, if P is preferentially accumulated in inorgani ...
DOI:
10.1007/s11676-020-01136-4

15. Phosphorus recovery via the formation of hydroxyapatite crystals at various nitrogen loading rate in an anammox-based UAFB

Author:
Xu, Wenjie; Zhang, Tianyi; Wan, Junfeng; Li, Haisong; Chen, Yun; Wang, Yan
Source:
Bioresource technology 2021 v.326 pp. 124628
ISSN:
0960-8524
Subject:
phosphorus; phosphorus content,   etc   ; anaerobic ammonium oxidation; biofilm; crystallization; hydroxyapatite; nitrogen; pH; technology; wastewater;     Show all 10 Subjects
Abstract:
... A strategy that integrates the anammox and hydroxyapatite crystallization in an up-flow anaerobic fixed-bed reactor (UAFB) was investigated to simultaneously remove nitrogen and recover phosphorus. During the 430 days of operation, 73.1 ± 6.6% of influent phosphorus was removed with an efficient nitrogen removal efficiency of 87.8 ± 1.7%. After long-term operation, numerous acicular and micron-siz ...
DOI:
10.1016/j.biortech.2020.124628

16. The impacts of local and regional factors on the phytoplankton community dynamics in a temperate river, northern China

Author:
Tian, Yulu; Jiang, Yuan; Liu, Qi; Xu, Dingxue; Liu, Yang; Song, Jinxi
Source:
Ecological indicators 2021 v.123 pp. 107352
ISSN:
1470-160X
Subject:
phosphorus; total phosphorus,   etc   ; Bacillariophyta; Chlorophyta; Cyanobacteria; ecology; eutrophication; hydrology; land use; phosphates; phytoplankton; rivers; streams; China;     Show all 14 Subjects
Abstract:
... Knowledge of the phytoplankton community dynamics is fundamentally important for river ecological management. Disentangling the relative impacts of co-occurring factors is critical to understanding the community responses to environmental heterogeneity, as well as anthropogenic activities. Taking phytoplankton community as the indicative variable, this study aimed at elucidating the impacts of dri ...
DOI:
10.1016/j.ecolind.2021.107352

17. Genome-Wide Characterization and Evolutionary Analyses of Purple Acid Phosphatase (PAP) Gene Family with Their Expression Profiles in Response to Low Phosphorus Stresses in Moso Bamboo (Phyllostachys edulis)

Author:
Zhou, Mengyan; Chen, Wanting; Zhao, Mingzhen; Li, Yachao; Li, Ming; Hu, Xia
Source:
Forests 2021 v.12 no.3
ISSN:
1999-4907
Subject:
phosphorus; soluble phosphorus,   etc   ; ; Phyllostachys edulis; acid phosphatase; genes; growth and development; metabolism; phylogeny; prediction; root systems;     Show all 11 Subjects
Abstract:
... Low phosphorus increases acid phosphatase activity and transfers soluble phosphorus from the underground to the above-ground, but also inhibits the growth and development of the Moso bamboo root system. Purple acid phosphatase (PAP), a kind of acid phosphatase, plays an important role in phosphorus (P) uptake and metabolism. In our study of the Moso bamboo PAP gene family, we identified 17 Moso ba ...
DOI:
10.3390/f12030326

18. Setting the Phosphorus Boundaries for Greek Natural Shallow and Deep Lakes for Water Framework Directive Compliance

Author:
Kagalou, Ifigenia; Ntislidou, Chrysoula; Latinopoulos, Dionissis; Kemitzoglou, Dimitra; Tsiaoussi, Vasiliki; Bobori, Dimitra C.
Source:
Water 2021 v.13 no.5
ISSN:
2073-4441
Subject:
phosphorus; total phosphorus,   etc   ; compliance; data collection; eutrophication; lakes; laws and regulations; phytoplankton; water; water management; Greece;     Show all 11 Subjects
Abstract:
... Eutrophication caused by nutrient enrichment is a predominant stressor leading to lake degradation and, thus, the set-up of boundaries that support good ecological status, the Water Framework Directive’s main target, is a necessity. Greece is one of the Member States that have recorded delays in complying with the coherent management goals of European legislation. A wide range of different statist ...
DOI:
10.3390/w13050739

19. Phosphorus removal in a pilot scale free water surface constructed wetland: hydraulic retention time, seasonality and standing stock evaluation

Author:
Baldovi, Aldrew Alencar; de Barros Aguiar, André Ribeiro; Benassi, Roseli Frederigi; Vymazal, Jan; de Jesus, Tatiane Araujo
Source:
Chemosphere 2021 v.266 pp. 128939
ISSN:
0045-6535
Subject:
phosphorus; total phosphorus,   etc   ; Eichhornia crassipes; macrophytes; plant reproduction; solar radiation; wastewater treatment; wet season;     Show all 8 Subjects
Abstract:
... Constructed wetlands (CWs) are decentralized wastewater treatment systems considered to be green and low cost. They have the potential to effectively remove pollutants and recycle nutrients with plant composting. However, they need large areas to implement them due to the usual high Hydraulic Retention Times (HRT), reaching up to 50 days. The main objective of the present study was to evaluate the ...
DOI:
10.1016/j.chemosphere.2020.128939

20. Migration and transformation mechanism of phosphorus in waste activated sludge during anaerobic fermentation and hydrothermal conversion

Author:
Shi, Yan; Chen, Zheng; Cao, Yang; Fan, Jiajun; Clark, James H.; Luo, Gang; Zhang, Shicheng
Source:
Journal of hazardous materials 2021 v.403 pp. 123649
ISSN:
0304-3894
Subject:
inorganic phosphorus; organic phosphorus,   etc   ; X-ray absorption spectroscopy; activated sludge; apatite; bioavailability; fermentation; liquids; pH;     Show all 9 Subjects
Abstract:
... This study investigated migration and transformation mechanism of P in waste activated sludge (WAS) during anaerobic fermentation (AF) process and the subsequent hydrothermal conversion (HTC) process. Control of pH during the AF processes was found to be significant, whereby the use of acidic (pH = 5.5) or alkaline conditions (pH = 9.5) facilitated the release of either apatite phosphorus (AP) or ...
DOI:
10.1016/j.jhazmat.2020.123649