PubAg

Main content area

You searched for: Subject "nitrate nitrogen" Remove constraint Subject: "nitrate nitrogen"
Start Over

Search

6,954  Search Results

« Previous | 1 - 20 of 6,954 |
Number of results to display per page

Search Results

1. Correction to: Modeling the temporal distribution of water, ammonium-N, and nitrate-N in the root zone of wheat using HYDRUS-2D under conservation agriculture

Author:
Shafeeq, Poomadathil Mohammed; Aggarwal, Pramila; Krishnan, Prameela; Rai, Vikas; Pramanik, Pragati; Das, Tapas Kumar
Source:
Environmental science and pollution research international 2020 v.27 no.2 pp. 2217-2225
ISSN:
0944-1344
Subject:
nitrate nitrogen,   etc   ; agricultural conservation practice; ammonium nitrogen; models; rhizosphere; wheat;     Show all 6 Subjects
Abstract:
... The original publication of this paper contains a mistake. ...
DOI:
10.1007/s11356-019-07225-0

2. The simultaneous antibiotics and nitrogen removal in vertical flow constructed wetlands: Effects of substrates and responses of microbial functions

Author:
Yuan, Yingrui; Yang, Baoshan; Wang, Hui; Lai, Xiaoshuang; Li, Feng; Salam, Mir Md Abdus; Pan, Fuxia; Zhao, Yuqiang
Source:
Bioresource technology 2020 v.310 pp. 123419
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; ammonium nitrogen; antibiotics; biochar; ciprofloxacin; constructed wetlands; manganese; nitrogen; resistance genes; sulfamethazine; wastewater; zeolites;     Show all 12 Subjects
Abstract:
... A vertical flow constructed wetland (VFCW) packed with the different substrates was designed to remediate the antibiotics in the wastewater. Zeolite (CW-Z) paralleled with Manganese (Mn) ore (CW-M) and biochar (CW-C) were used to enhance the synchronous removal of ciprofloxacin hydrochloride (CIPH), sulfamethazine (SMZ) and nitrogen (N) from the wastewater. The result indicated that CW-M had a sig ...
DOI:
10.1016/j.biortech.2020.123419

3. Elemental sulfur-based autotrophic denitrification in stoichiometric S0/N ratio: Calibration and validation of a kinetic model

Author:
Huiliñir, C.; Acosta, L.; Yanez, D.; Montalvo, S.; Esposito, G.; Retamales, G.; Levicán, G.; Guerrero, L.
Source:
Bioresource technology 2020 v.307 pp. 123229
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; batch systems; denitrification; hydrolysis; inoculum; kinetics; models; nitrates; poultry; stoichiometry; wastewater treatment;     Show all 11 Subjects
Abstract:
... The inclusion of S⁰ hydrolysis in a kinetic model of autotrophic denitrification has been recently proposed; however the model has not been calibrated or validated yet. Thus, a new methodology was developed and applied to calibrate and validate this kinetic model for the first time. An inoculum adapted from a poultry wastewater treatment plant at stoichiometric S⁰/NO₃⁻ ratio was used. The model wa ...
DOI:
10.1016/j.biortech.2020.123229

4. Evaluation of partial nitrification efficiency as a response to cadmium concentration and microplastic polyvinylchloride abundance during landfill leachate treatment

Author:
Li, Lu; Li, Zhouyang; Liu, Dan; Song, Kang
Source:
Chemosphere 2020 v.247 pp. 125903
ISSN:
0045-6535
Subject:
nitrate nitrogen,   etc   ; ammonia; ammonium nitrogen; cadmium; kinetics; landfill leachates; microplastics; nitrification; oxidation; poly(vinyl chloride);     Show all 10 Subjects
Abstract:
... The partial nitrification efficiency response to the presence of cadmium (Cd²⁺) and microplastics was investigated. Microplastics polyvinylchloride (PVC) abundance was 0–10,000 particles/L, and Cd²⁺ concentration was 0–10 mg/L. Cd-only inhibited the NH₄⁺-N oxidation rate 1.21, 1.23, and 1.18 times with concentrations at 1, 5, and 10 mg/L, respectively. PVC-only inhibited NH₄⁺-N oxidation rate 1.01 ...
DOI:
10.1016/j.chemosphere.2020.125903

5. Impact of rainfall characteristics on the NO3 – N concentration in a tailwater recovery ditch

Author:
Pérez-Gutiérrez, Juan D.; Paz, Joel O.; Tagert, Mary Love M.; Sepehrifar, Mohammad
Source:
Agricultural water management 2020 v.233 pp. 106079
ISSN:
0378-3774
Subject:
nitrate nitrogen,   etc   ; agricultural land; autumn; best management practices; farms; rain; spring; surface water; watersheds; Mississippi;     Show all 10 Subjects
Abstract:
... Rainfall characteristics can be a major factor influencing the ability of best management practices to reduce nutrient loss from agricultural lands to receiving waterbodies. The goal of this study was to examine how rainfall characteristics impacted NO₃ – N concentrations in a tailwater recovery (TWR) ditch implemented at a farm within the Porter Bayou watershed in Mississippi, USA. We used a meth ...
DOI:
10.1016/j.agwat.2020.106079

6. Comparison of Performance in a Bioelectrochemical System for Simultaneous Denitrification and Vanadate (V) Removal Using Hydrogen as the Sole Electron Donor

Author:
Wang, Hongyu; Wang, Jing; Zhang, Wei; Hu, Xiaoling; Lv, Wanling
Source:
Geomicrobiology journal 2020 v.37 no.4 pp. 301-307
ISSN:
1521-0529
Subject:
nitrate nitrogen,   etc   ; aquifers; bioelectrochemistry; biofilm; cathodes; denitrification; electric current; groundwater; hydrogen; microorganisms; nitrates; vanadium;     Show all 12 Subjects
Abstract:
... An auto-hydrogenotrophic bioelectrochemical system (BES) was set up to investigate the performance of removing nitrate (NO₃⁻–N) and vanadate (V(V)) simultaneously. In this BES, hydrogen is produced during electrolytic reactions and the microorganisms on cathode biofilm can use it as the electron donor to reduce NO₃⁻–N and V(V). This experiment confirmed that the removal efficiency of nitrate and v ...
DOI:
10.1080/01490451.2019.1697394

7. Highly efficient and low-energy nitrogen removal of sludge reduction liquid by coupling denitrification- partial nitrification-Anammox in an innovative auto-recycling integration device with different partitions

Author:
Li, Xiang; Tan, Xin-wei; Yuan, Yan; Huang, Yong; Li, Bo-lin; Jin, Run
Source:
Bioresource technology 2020 v.302 pp. 122880
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; Nitrosomonas; ammonium nitrogen; anaerobic ammonium oxidation; denitrification; microorganisms; nitrogen; organic matter; sludge; total nitrogen;     Show all 10 Subjects
Abstract:
... The denitrification (DN), partial nitrification (PN) and Anammox processes were coupled in an auto-recycling integration device to remove nitrogen from the supernatant of sludge reduction pretreatment. The nitrogen removal performance of the device and the effect of organic matter concentration on the nitrogen transformation were discussed. The results showed that DN, PN and Anammox are well coupl ...
DOI:
10.1016/j.biortech.2020.122880

8. Nitrate removal from low carbon-to-nitrogen ratio wastewater by combining iron-based chemical reduction and autotrophic denitrification

Author:
Liu, Xiawei; Huang, Manqi; Bao, Shaopan; Tang, Wei; Fang, Tao
Source:
Bioresource technology 2020 v.301 pp. 122731
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; Hydrogenophaga; carbon nitrogen ratio; chemical reduction; denitrification; nitrates; wastewater;     Show all 7 Subjects
Abstract:
... Nitrate removal from low carbon-to-nitrogen ratio (C/N) wastewater has always been a knotty problem due to the deficiency of organics. Here, a novel iron-based chemical reduction and autotrophic denitrification (ICAD) system was developed. ICAD system could maintain average nitrate removal efficiency of 97.2% for 131 days with feeding 20.3 mg NO₃–-N/L at hydraulic retention time (HRT) of 24 h. The ...
DOI:
10.1016/j.biortech.2019.122731

9. Response of nitrogen removal performance, functional genes abundances and N-acyl-homoserine lactones release to carminic acid of anammox biomass

Author:
Liu, Lingjie; Ji, Min; Wang, Fen; Yan, Zhao; Tian, Zhongke
Source:
Bioresource technology 2020 v.299 pp. 122567
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; anaerobic ammonium oxidation; biomass; electron transfer; lactones; nitrifying bacteria; nitrogen; polymers;     Show all 8 Subjects
Abstract:
... Carminic acid (CA) can serve as a redox mediator and influence the electron transfer process. CA dosages of 0–5 mg/L were added to anaerobic ammonia oxidation (anammox) biomass. The results illustrated that CA not only reduced the inorganic nitrogen removal efficiency, but also decreased the nitrogen removal rate. The deterioration of nitrogen removal performance was due to the excess production o ...
DOI:
10.1016/j.biortech.2019.122567

10. Enhanced simultaneous nitrification and denitrification performance in a fixed-bed system packed with PHBV/PLA blends

Author:
Sun, Haimeng; Yang, Zhongchen; Yang, Feifei; Wu, Weizhong; Wang, Jianlong
Source:
International biodeterioration & biodegradation 2020 v.146 pp. 104810
ISSN:
0964-8305
Subject:
nitrate nitrogen,   etc   ; ammonium nitrogen; biofilm; carbon; carbon nitrogen ratio; denitrification; nitrification; polylactic acid; sewage treatment; wastewater;     Show all 10 Subjects
Abstract:
... In the present study, simultaneous nitrification and denitrification of sewage treatment plant effluent was evaluated using an up-flow fixed-bed system packed with poly (3-hydroxybutyrate-hydroxyvalerate)/polylactide (PHBV/PLA) blends used in a dual role as carbon source and biofilms carrier. 98.1 ± 2.9% and 87.2 ± 6.8% of influent NH4+-N and NO3−-N was removed from the synthetic wastewater. TN re ...
DOI:
10.1016/j.ibiod.2019.104810

11. Biological ammonium and sulfide oxidation in a nitrifying sequencing batch reactor: Kinetic and microbial population dynamics assessments

Author:
Bejarano Ortiz, Diego Iván; Martínez Jardines, Miguel Ángel; Cuervo López, Flor de María; Texier, Anne-Claire
Source:
Chemosphere 2020 v.253 pp. 126637
ISSN:
0045-6535
Subject:
nitrate nitrogen,   etc   ; ammonium; ammonium nitrogen; bacteria; batch systems; nitrates; nitrification; nitrites; oxidation; population dynamics; sludge; sulfides; wastewater treatment;     Show all 13 Subjects
Abstract:
... A kinetic study was carried out in a sequencing batch reactor (SBR) (125 mg NH₄⁺-N/L) inoculated with a physiologically stable nitrifying sludge not previously acclimated to sulfur compounds and fed at different initial sulfide concentrations (2.5–20.0 mg HS⁻-S/L). Up to 10.0 mg HS⁻-S/L, the nitrifying process kept stable and complete, reaching an ammonium consumption efficiency (ENH₄₊) of 100% an ...
DOI:
10.1016/j.chemosphere.2020.126637

12. Plant diversity improves the effluent quality and stability of floating constructed wetlands under increased ammonium/nitrate ratio in influent

Author:
Wang, Xiao; Luo, Bin; Wang, Lichunxiao; Zhao, Yu; Wang, Qian; Li, Dan; Gu, Baojing; Min, Yong; Chang, Scott X.; Ge, Ying; Chang, Jie
Source:
Journal of environmental management 2020 v.266 pp. 110607
ISSN:
0301-4797
Subject:
nitrate nitrogen,   etc   ; Phragmites australis; Typha latifolia; ammonium; ammonium nitrogen; constructed wetlands; nitrates; nitrogen; species richness; wastewater treatment; water quality;     Show all 11 Subjects
Abstract:
... The major targets of constructed wetlands (CWs) during wastewater treatment include achieving high-quality effluent and maintaining stable effluent quality. Plant species diversity can increase nitrogen (N) removal efficiency and improve effluent quality by decreasing the effluent N concentrations, including nitrate (NO₃⁻-N), ammonium (NH₄⁺-N) and total inorganic nitrogen (TIN) concentrations in C ...
DOI:
10.1016/j.jenvman.2020.110607

13. Pyrrhotite-sulfur autotrophic denitrification for deep and efficient nitrate and phosphate removal: Synergistic effects, secondary minerals and microbial community shifts

Author:
Li, Ruihua; Wei, Dongyang; Wang, Wei; Zhang, Yongwei
Source:
Bioresource technology 2020 v.308 pp. 123302
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; Thiobacillus; denitrification; ions; iron; microbial communities; minerals; nitrates; nitrogen; phosphates; phosphorus; protons; sulfate-reducing bacteria; sulfur; synergism; wastewater;     Show all 16 Subjects
Abstract:
... Pyrrhotite-sulfur autotrophic denitrification (PSAD) system, using mixture of pyrrhotite and sulfur particle as electron donor, was studied through batch, column and pilot experiments. Treating synthetic secondary effluent at HRT 3 h, the PSAD system obtained the effluent with NO₃⁻-N 0.28 ± 0.14 mg·L⁻¹ and without PO₄³⁻-P to be detected. Thiobacillus was the most abundant autotrophic denitrificati ...
DOI:
10.1016/j.biortech.2020.123302

14. Utilization of domestic wastewater as a water source of Tetradesmusobliquus PF3 for the biological removal of nitric oxide

Author:
Ma, Shanshan; Yu, Yanling; Cui, Hao; Li, Jiang; Feng, Yujie
Source:
Environmental pollution 2020 v.262 pp. 114243
ISSN:
0269-7491
Subject:
nitrate nitrogen,   etc   ; Scenedesmus obliquus; algae culture; ammonium; ammonium nitrogen; biomass; economic sustainability; flue gas; microalgae; municipal wastewater; nitric oxide; nutrients;     Show all 12 Subjects
Abstract:
... The reduction of nitrogen oxide (DeNOx) from flue gas by microalgae is a promising technology that has attracted increasing attention. Because the water source is a major limitation of microalgae application in the DeNOx from flue gas, we investigated the feasibility of using domestic wastewater (WW) as a water source. As a result, a biomass accumulation rate of 0.27 ± 0.01 mg L⁻¹ d⁻¹ was achieved ...
DOI:
10.1016/j.envpol.2020.114243

15. Carbon, Nitrogen and Phosphorus Mineralization as Influenced by Type of Organic Residues and Soil Contact Variation in Vertisol of Central India

Author:
Meena, Amrit Lal; Jha, Pramod; Dotaniya, M. L.; Kumar, Bipin; Meena, B. P.; Jat, R. L.
Source:
Agricultural research 2020 v.9 no.2 pp. 232-240
ISSN:
2249-720X
Subject:
nitrate nitrogen,   etc   ; Leucaena leucocephala; Vertisols; animal manures; biochar; crop yield; laboratory experimentation; mineralization; nitrogen; phosphorus; soil organic carbon; India;     Show all 12 Subjects
Abstract:
... Soil organic carbon (C) and nitrogen (N) play a critical role in plant nutrient dynamics and crop yield performance under different soils. In this study, the amount of carbon (C), N and phosphorus (P) mineralization as influenced by type of organic residue and soil contact variation was studied for an incubation period of 75 days under controlled laboratory conditions. Different types of residues, ...
DOI:
10.1007/s40003-019-00425-7

16. Key role of different levels of dissolved oxygen in hydrolyzed polyacrylamide bioconversion: Focusing on metabolic products, key enzymes and functional microorganisms

Author:
Zhao, Lanmei; Zhang, Congcong; Lu, Zhiyang; Bao, Mutai; Lu, Jinren
Source:
Bioresource technology 2020 v.306 pp. 123089
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; ammonium nitrogen; biotransformation; dissolved oxygen; enzyme activity; hydrolysis; microorganisms; nitrogen; pollutants; polyacrylamide; total nitrogen; volatile fatty acids;     Show all 12 Subjects
Abstract:
... Dissolved oxygen (DO) played a short board effect on nitrogen biotransformation and pollutant metabolism. This study for the first time explored the key role of different levels of DO (covering anaerobic, anoxic and aerobic) on hydrolyzed polyacrylamide (HPAM) bioconversion. HPAM was metabolized to intermediates with different chain length. Volatile fatty acid (VFA) production rose first and then ...
DOI:
10.1016/j.biortech.2020.123089

17. Sulphur-based autotrophic denitrification of wastewater obtained following graphite production: Long-term performance, microbial communities involved, and functional gene analysis

Author:
Xu, Xiaochen; Zhang, Rao; Jiang, Hongbin; Yang, Fenglin
Source:
Bioresource technology 2020 v.306 pp. 123117
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; Thiobacillus; biochemical pathways; bioreactors; denitrification; energy efficiency; graphene; metagenomics; microbial communities; proline; salinity; sodium-hydrogen antiporter; wastewater;     Show all 13 Subjects
Abstract:
... Sulphur-based autotrophic denitrification is an energy-efficient NO₃–-N removal process; it does not require carbon and may potentially replace traditional denitrification processes. This process was used to treat graphite production-derived wastewater and achieved almost complete removal of NO₃–-N (concentration in effluent: 5.2 mg/L; concentration in influent: 606 mg/L) at a salinity of 15 g/L w ...
DOI:
10.1016/j.biortech.2020.123117

18. Evaluating soil nitrate dynamics in an intercropping dripped ecosystem using HYDRUS-2D

Author:
Chen, Ning; Li, Xianyue; Šimůnek, Jirí; Shi, Haibin; Hu, Qi; Zhang, Yuehong
Source:
The Science of the total environment 2020 v.718 pp. 137314
ISSN:
0048-9697
Subject:
nitrate nitrogen,   etc   ; corn; crops; ecosystems; intercropping; lead; models; nitrates; nitrogen fertilizers; nutrients; soil nutrient dynamics; soil nutrients; sowing; tomatoes;     Show all 14 Subjects
Abstract:
... The competition mechanisms between crop species for water and nutrients, especially nitrate (NO₃-N), in intercropping ecosystems are still poorly understood. Therefore, an experiment involving high (300 kg ha⁻¹ for corn and 250 kg ha⁻¹ for tomato), medium (210 kg ha⁻¹ for corn and 175 kg ha⁻¹ for tomato), and low (150 kg ha⁻¹ for corn and 125 kg ha⁻¹ for tomato) N-fertilizer applications (HF, MF, ...
DOI:
10.1016/j.scitotenv.2020.137314

19. Advanced nitrogen removal from municipal wastewater via two-stage partial nitrification-simultaneous anammox and denitrification (PN-SAD) process

Author:
Deng, Shiyun; Peng, Yongzhen; Zhang, Liang; Wu, Lei
Source:
Bioresource technology 2020 v.304 pp. 122955
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; Thauera; aeration; ammonium nitrogen; anaerobic ammonium oxidation; denitrification; dissolved oxygen; energy conservation; municipal wastewater; nitrite nitrogen; nitrites; nitrogen;     Show all 12 Subjects
Abstract:
... A modified two-stage anammox process was constructed and achieved advanced nitrogen removal from municipal wastewater. The first stage was Partial Nitrification (PN), in which nitrite accumulation rate was over 95% by controlling dissolved oxygen concentration (<1 mg/L) and aeration time (90–120 min). The second stage was simultaneous anammox and denitrification (SAD), in which the reactor was fed ...
DOI:
10.1016/j.biortech.2020.122955

20. The effect of hydraulic retention time on ammonia and nitrate bio-removal over nitrite process

Author:
Lu, Yaofeng; Ding, Zhibin; Gao, Kexin; Duo, Zijun; Xu, Shaoyi; Zhao, Xiaolan; Li, Wei; Zheng, Ping
Source:
Environmental technology 2020 v.41 no.10 pp. 1275-1283
ISSN:
1479-487X
Subject:
nitrate nitrogen,   etc   ; Halomonas; ammonia; ammonium nitrogen; anaerobic ammonium oxidation; bacteria; genes; microbial communities; nitrates; nitrites; nitrogen; ribosomal RNA;     Show all 12 Subjects
Abstract:
... Ammonia and Nitrate Bio-removal Over Nitrite (ANBON) is a new biological process, which couples denitratation with Anaerobic Ammonium Oxidation (ANAMMOX) to carry out simultaneous removal of nitrate nitrogen and ammonia nitrogen. The effect of hydraulic retention time (HRT) on the performance of ANBON process was investigated. The results showed that the optimal HRT was about 0.7 h and the nitroge ...
DOI:
10.1080/09593330.2018.1530697