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1. Synthesis of polyoxometalates (POM)/TiO2/Cu and removal of nitrate nitrogen in water by photocatalysis

Author:
Wang, Lingsheng; Fu, Weizhang; Zhuge, Yuping; Wang, Jun; Yao, Fanfeng; Zhong, Wanzhen; Ge, Xiaohong
Source:
Chemosphere 2021 v.278 pp. 130298
ISSN:
0045-6535
Subject:
nitrate nitrogen,   etc   ; formic acid; groundwater; nitrates; photocatalysis; photocatalysts; purification methods; sol-gel processing; water purification;     Show all 9 Subjects
Abstract:
... Nitrate nitrogen is one of the vital issues needed to be addressed in the water purification process utilizing groundwater as a drinking water source. In this study, a sandwich-type polyoxometalate Na [α-SiW₉O₃₄] has been synthesized and SiW₉/TiO₂/Cu composite has been prepared by sol-gel method. Samples have been characterized by XRD, BET, FTIR, SEM, ED-Mapping, UV–Vis, XPS. The catalytic reducti ...
DOI:
10.1016/j.chemosphere.2021.130298

2. Straw incorporation helps inhibit nitrogen leaching in maize season to increase yield and efficiency in the Loess Plateau of China

Author:
Meng, Xiangping; Guo, Ziyan; Yang, Xueni; Su, Wennan; Li, Zhimin; Wu, Xiaorong; Ahmad, Irshad; Cai, Tie; Han, Qingfang
Source:
Soil & tillage research 2021 v.211 pp. 105006
ISSN:
0167-1987
Subject:
nitrate nitrogen,   etc   ; corn; grain yield; nitrogen; pollution; research; soil; soil fertility; straw; tillage; wheat; China;     Show all 12 Subjects
Abstract:
... Straw incorporation and nitrogen (N) fertilization are the two important strategies to increase soil fertility and crops productivity, however their improper utilization reduces yield results in environmental pollution and wasting resources. The objective of the experiment was to evaluate the effects of straw incorporation and N fertilization and their interaction on the grain yield, nitrogen reso ...
DOI:
10.1016/j.still.2021.105006

3. Biological nitrification inhibition by sorghum root exudates impacts ammonia-oxidizing bacteria but not ammonia-oxidizing archaea

Author:
Li, Yaying; Zhang, Yang; Chapman, Stephen James; Yao, Huaiying
Source:
Biology and fertility of soils 2021 v.57 no.3 pp. 399-407
ISSN:
0178-2762
Subject:
nitrate nitrogen,   etc   ; ammonia; ammonium; ammonium nitrogen; dicyandiamide; exudation; hydroponics; nitrification; nitrogen; nitrogen fertilizers; oxidants; soil;     Show all 12 Subjects
Abstract:
... Sorghum has a great capacity to release biological nitrification inhibitors (BNIs), but the inhibitory effect on nitrification and ammonia oxidizer populations under planted soil conditions is unclear. A pot experiment with three nitrogen (N) application rates (0, 50, and 200 mg N kg⁻¹) was set up to detect the influence of sorghum growth on soil nitrification and investigate the function of block ...
DOI:
10.1007/s00374-020-01538-w

4. Qualitative risk aggregation problems for the safety of multiple aquifers exposed to nitrate, fluoride and arsenic contaminants by a ‘Total Information Management’ framework

Author:
Nadiri, Ata Allah; Sedghi, Zahra; Khatibi, Rahman
Source:
Journal of hydrology 2021 v.595 pp. 126011
ISSN:
0022-1694
Subject:
nitrate nitrogen,   etc   ; aquifers; arsenic; fluorides; information management; models; multivariate analysis; pollution; risk;     Show all 9 Subjects
Abstract:
... The aquifer at Varzeqan plain, with multiple confined/unconfined and hard-rock boundaries, is exposed to risks from several contaminants (nitrate-N, fluoride and arsenic) originated by anthropogenic and/or geogenic activities, which are possibly accelerating by anthropogenic activities. The study is a research initiative driven by impacts of poor or non-existent planning/ regulation practices to p ...
DOI:
10.1016/j.jhydrol.2021.126011

5. Hydrogenotrophic Denitrification of Groundwater Using a Simplified Reactor for Drinking Water: A Case Study in the Kathmandu Valley, Nepal

Author:
Shinoda, Kenta; Maharjan, Amit Kumar; Maharjan, Rabin; Singhopon, Tippawan; Rujakom, Suphatchai; Tsutsumi, Yuya; Shakya, Bijay Man; Kamei, Tatsuru; Eamrat, Rawintra; Kazama, Futaba
Source:
Water 2021 v.13 no.4
ISSN:
2073-4441
Subject:
nitrate nitrogen,   etc   ; case studies; denitrification; groundwater; groundwater treatment; nitrogen; water shortages; Nepal;     Show all 8 Subjects
Abstract:
... High nitrate-nitrogen (NO₃⁻–N) content is a typical feature of groundwater, which is the primary water source in the Kathmandu Valley, Nepal. Considering the Kathmandu Valley’s current problem of water scarcity, a user-friendly system for removing NO₃⁻–N from groundwater is promptly desired. In this study, a simplified hydrogenotrophic denitrification (HD) reactor was developed for the Kathmandu V ...
DOI:
10.3390/w13040444

6. The Operating Characteristics of Partial Nitrification by Controlling pH and Alkalinity

Author:
Chen, Chen; Song, Yinghao; Yuan, Yanchao
Source:
Water 2021 v.13 no.3
ISSN:
2073-4441
Subject:
nitrate nitrogen,   etc   ; alkalinity; ammonium nitrogen; batch systems; dissolved oxygen; nitrification; nitrites; nitrogen; oxygen; pH; sludge; water;     Show all 12 Subjects
Abstract:
... In many experiments, a partial nitrification device is initiated with the use of highly active nitrating sludge because of the large number of nitrifying bacteria. Ammonia-oxidizing bacteria (AOB) are more adaptable to low-dissolved oxygen environments than nitrite-oxidizing bacteria (NOB). NOB activity was inhibited when the dissolved oxygen (DO) levels were decreased, causing the nitrate-nitroge ...
DOI:
10.3390/w13030286

7. Novel 3D Pd-Cu(OH)2/CF cathode for rapid reduction of nitrate-N and simultaneous total nitrogen removal from wastewater

Author:
Zhou, Changhui; Bai, Jing; Zhang, Yan; Li, Jinhua; Li, Zhijing; Jiang, Panyu; Fang, Fei; Zhou, Mengyang; Mei, Xiaojie; Zhou, Baoxue
Source:
Journal of hazardous materials 2021 v.401 pp. 123232
ISSN:
0304-3894
Subject:
nitrate nitrogen,   etc   ; absorption; cathodes; chlorine; foams; nanowires; palladium; surface area; total nitrogen; wastewater; wastewater treatment;     Show all 11 Subjects
Abstract:
... Removal of NO₃⁻ is a challenging problem in wastewater treatment. Electrocatalysis shows a great potential to remove NO₃⁻ but selectively converting NO₃⁻ to N₂ is facing a low efficiency. Here, a novel 3D Pd-Cu(OH)₂/CF cathode based electrocatalytic (EC) system was proposed that can rapidly and selectively convert NO₃⁻ to NH₄⁺, and further convert to N₂ simultaneously. The special designs for the ...
DOI:
10.1016/j.jhazmat.2020.123232

8. Changes in Agrochemical Parameters of Typical Chernozem Soils Caused by Various Cultivation Techniques, Chemization, and Biologization

Author:
Khusainov, Kh. A.; Abasov, M. Sh.; Tuntaev, A. V.; Murtazaliev, M. S.; Zavalin, A. A.
Source:
Russian agricultural sciences 2021 v.47 no.1 pp. 48-53
ISSN:
1068-3674
Subject:
nitrate nitrogen,   etc   ; Chernozems; agrochemicals; biological production; forage; green manures; humus; phosphorus; potassium; spring; subsoil;     Show all 11 Subjects
Abstract:
... This paper examines effects caused by basic soil cultivation techniques combined with the integrated application of mineral fertilizers and biopreparations amid the manure and green manure aftereffects on the agrochemical parameters in the arable (0–25 cm) and subsurface (25–50 cm) layers of typical chernozem soils. It is established that disk plowing significantly (by 2–4 times) improves all agro ...
DOI:
10.3103/S1068367421010092

9. Effects of Basic Soil Treatment Techniques on the Nitrate Nitrogen Accumulation Dynamics in Soil

Author:
Sokolov, N. M.; Zholinsky, N. M.; Streltsov, S. B.; Korableva, I. N.
Source:
Russian agricultural sciences 2021 v.47 no.1 pp. 54-57
ISSN:
1068-3674
Subject:
nitrate nitrogen,   etc   ; agricultural research; landscapes; mineralization; nitrification; research institutions; soil; soil treatment; spring wheat;     Show all 9 Subjects
Abstract:
... This paper addresses the effects that basic soil treatment techniques that place crop residues on the field surface in different ways have on the nitrate nitrogen content in the soil. The study was carried out in 2018–2019 in Saratov oblast in the framework of a stationary experiment conducted by the Agricultural Research Institute for the Southeastern Region in a sloping–hollow agrolandscape repr ...
DOI:
10.3103/S1068367421010195

10. Efficacy of embedded metribuzin and tribenuron-methyl herbicides in field-grown vegetable crops infested by weeds

Author:
Volova, Tatyana; Demidenko, Alexey; Kurachenko, Natalia; Baranovsky, Sergey; Petrovskaya, Olga; Shumilova, Anna
Source:
Environmental science and pollution research international 2021 v.28 no.1 pp. 982-994
ISSN:
0944-1344
Subject:
nitrate nitrogen,   etc   ; ascorbic acid; beets; biometry; metribuzin; pollution; poly-3-hydroxybutyrate; research; soil; tomatoes; wood flour;     Show all 11 Subjects
Abstract:
... The purpose of the present study was to investigate the efficacy of the experimental formulations of the metribuzin (MET) and tribenuron-methyl (TBM) herbicides embedded in the matrix of degradable poly-3-hydroxybutyrate blended with wood flour in field-grown tomato and beet crops infested by weeds. There is a necessity to develop environmentally friendly and effective means to protect plants beca ...
DOI:
10.1007/s11356-020-10359-1

11. Efficacy of auto-aggregating aerobic denitrifiers with coaggregation traits for bioaugmentation performance in biofilm-formation and nitrogen-removal

Author:
Hong, Pei; Yang, Keyin; Shu, Yilin; Xiao, Bangding; Wu, Hailong; Xie, Yunyun; Gu, Yali; Qian, Fangping; Wu, Xingqiang
Source:
Bioresource technology 2021 v.337 pp. 125391
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; Methylobacterium; Pseudomonas; ammonium nitrogen; bioaugmentation; biofilm; bioreactors; community structure; denitrifying microorganisms; microbial communities; nitrite nitrogen; nitrogen; wastewater treatment;     Show all 13 Subjects
Abstract:
... To promote efficiency nitrogen-rich wastewater treatment from a sequencing batch biofilm reactor (SBBR), three aerobic denitrifiers (Pseudomonas mendocinaIHB602, Methylobacterium gregansDC-1 and Pseudomonas stutzeriIHB618) with dual-capacities of strong auto-aggregation and high nitrogen removal efficiency were studied. The aggregation index analysis indicated that coaggregation of the three strai ...
DOI:
10.1016/j.biortech.2021.125391

12. Characterization and mechanism analysis of tylosin biodegradation and simultaneous ammonia nitrogen removal with strain Klebsiella pneumoniae TN-1

Author:
Zhang, Bo; Wang, Mengmeng; Qu, Jianhua; Zhang, Ying; Liu, Huiling
Source:
Bioresource technology 2021 v.336 pp. 125342
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; Klebsiella pneumoniae; ammonia; ammonium; ammonium nitrogen; bioaugmentation; biodegradation; fermentation; hydrolysis; nitrogen; toxicity; transcription (genetics); tylosin; volatilization;     Show all 14 Subjects
Abstract:
... A novel bacterial strain that exhibited a high capacity for the simultaneous degradation and removal of tylosin and ammonia nitrogen, respectively, was isolated from tylosin fermentation dregs (TFDs) and identified as Klebsiella pneumoniae TN-1. The removal efficiencies of tylosin and ammonia nitrogen reached 95.31% and 83.26%, respectively, at initial concentrations of 300 mg/L for both. Three id ...
DOI:
10.1016/j.biortech.2021.125342

13. Different traits from the paddy soil and upland soil regulate bacterial community and molecular composition under long-term fertilization regimes

Author:
Li, Dandan; Zhao, Bingzi; Zhang, Jiabao; Liu, Kailou; Huang, Qinghai
Source:
Applied soil ecology 2021 v.165 pp. 103982
ISSN:
0929-1393
Subject:
nitrate nitrogen,   etc   ; bacterial communities; community structure; corn; pH; paddy soils; rice; soil ecology; soil organic carbon; upland soils; weather;     Show all 11 Subjects
Abstract:
... Fertilization-induced changes in soil properties from the paddy soil and upland soil may directly regulate bacterial community composition, which usually coincide with shifts in molecular composition of soil organic carbon (SOC) in the upland soil. However, systematical comparisons lack on how regulators vary with cropping systems under the same weather conditions and soil parent materials. Here, ...
DOI:
10.1016/j.apsoil.2021.103982

14. Pseudomonas mendocina LYX: A novel aerobic bacterium with advantage of removing nitrate high effectively by assimilation and dissimilation simultaneously

Author:
Li, Yuxin; Ling, Jiayin; Chen, Pengcheng; Chen, Jinliang; Dai, Ruizhi; Liao, Jinsong; Yu, Jiejing; Xu, Yanbin
Source:
Frontiers of environmental science & engineering 2021 v.15 no.4 pp. 57
ISSN:
2095-2201
Subject:
nitrate nitrogen,   etc   ; Pseudomonas mendocina; activated sludge; denitrification; denitrifying bacteria; farms; nitrates; nitrogen; process control; swine; total nitrogen; wastewater treatment;     Show all 12 Subjects
Abstract:
... The problem of nitrate accumulation in aerobic tank and total nitrogen excessive discharge in effluent was very common in traditional livestock and poultry farming wastewater treatment systems owing to the lengthy process flow and low process control level. A strain LYX of aerobic bacterium was isolated from the activated sludge of a wastewater treatment system in a pig farm, which could remove ni ...
DOI:
10.1007/s11783-020-1349-3

15. Identifying nitrogen sources in intensive livestock farming watershed with swine excreta treatment facility using dual ammonium (δ15NNH4) and nitrate (δ15NNO3) nitrogen isotope ratios axes

Author:
Ryu, Hong-Duck; Kim, Sun-Jung; Baek, Un-il; Kim, Deok-Woo; Lee, Hyun-Jeoung; Chung, Eu Gene; Kim, Min-Seob; Kim, Kyunghyun; Lee, Jae Kwan
Source:
The Science of the total environment 2021 v.779 pp. 146480
ISSN:
0048-9697
Subject:
nitrate nitrogen,   etc   ; ammonium; environment; excreta; isotopes; nitrates; nitrification; nitrogen; oxygen; pollution; rivers; sewage; sewage effluent; soil; streams; swine;     Show all 16 Subjects
Abstract:
... We proposed a novel approach based on dual ammonium and nitrate nitrogen isotope ratios (δ¹⁵NNH₄ and δ¹⁵NNO₃, respectively) axes to identify nitrogen sources in intensive livestock farming watersheds, especially those with swine excreta treatment facilities. The δ¹⁵NNH₄ and δ¹⁵NNO₃ values in water samples were measured monthly in 2016–2017. Soil and mineral fertilizers, sewage, sewage effluent, ma ...
DOI:
10.1016/j.scitotenv.2021.146480

16. Impact of grass traits on the transport path and retention efficiency of nitrate nitrogen in vegetation filter strips

Author:
Sheng, Liting; Zhang, Zhanyu; Xia, Jihong; Liang, Ziwei; Yang, Jie; Chen, Xiao-an
Source:
Agricultural water management 2021 v.253 pp. 106931
ISSN:
0378-3774
Subject:
nitrate nitrogen,   etc   ; Chrysopogon zizanioides; Eremochloa ophiuroides; Festuca arundinacea; developmental stages; grasses; nitrogen; overland flow; runoff; subsurface flow; vegetation; water management;     Show all 12 Subjects
Abstract:
... Vegetation filter strips (VFS) have been shown to effectively intercept water flow and remove nitrogen. Studies of the vegetation effects on water flow and nitrogen transport are typically studied based on qualitative analyses with species, layouts, growth stage, seasonal changes, and other vegetation conditions and did not considered quantification based on plant traits. In this study, the transp ...
DOI:
10.1016/j.agwat.2021.106931

17. Effects of truffle inoculation on a nursery culture substrate environment and seedling of Carya illinoinensis

Author:
Huang, Yue; Zou, Jie; Kang, Zongjing; Zhang, Xiaoping; Penttinen, Petri; Zhang, Xiaoping; Li, Xiaolin
Source:
Fungal biology 2021 v.125 no.7 pp. 576-584
ISSN:
1878-6146
Subject:
nitrate nitrogen,   etc   ; Carya illinoinensis; Proteobacteria; Tuber aestivum; bacterial communities; denitrification; host plants; mycology; peroxidase; plant growth; rhizosphere; seedlings; soil; truffles;     Show all 14 Subjects
Abstract:
... We inoculated Tuber aestivum and Tuber sinoaestivum on Carya illinoinensis to explore the effects of inoculation on host plant growth, enzyme activities, the physicochemical properties of rhizosphere soil, the denitrifying bacterial community in the rhizosphere, and the distribution of mating type genes in the rhizosphere. We found that the Tuber spp. inoculation increased the height of the host p ...
DOI:
10.1016/j.funbio.2021.02.006

18. Re-using ammonium-rich wastewater as a moisture conditioning agent during composting thermophilic period improves composting performance

Author:
Xie, Dong; Gao, Ming; Yang, Min; Xu, Mingyue; Meng, Jie; Wu, Chuanfu; Wang, Qunhui; Liu, Shu
Source:
Bioresource technology 2021 v.332 pp. 125084
ISSN:
0960-8524
Subject:
nitrate nitrogen,   etc   ; ammonia; ammonium; composts; greenhouse gases; hydrolysis; mineralization; organic matter; tap water; technology; wastewater; water content;     Show all 12 Subjects
Abstract:
... A weakly acidic ammonium-rich wastewater (STL) was intended to reuse as a moisture conditioning agent for composting to increase nitrogen content of compost. The influence of adding STL in the mesophilic period (MP), thermophilic period (TP), and cooling period (CP) on composting performance was investigated. Results revealed that organic degradation was strongly suppressed in MP, whereas no diffe ...
DOI:
10.1016/j.biortech.2021.125084

19. Modelling the effects of climate change, agricultural inputs, cropping diversity, and environment on soil nitrogen and phosphorus: A case study in Saskatchewan, Canada

Author:
Lychuk, Taras E.; Moulin, Alan P.; Lemke, Reynald L.; Izaurralde, Roberto C.; Johnson, Eric N.; Olfert, Owen O.; Brandt, Stewart A.
Source:
Agricultural water management 2021 v.252 pp. 106850
ISSN:
0378-3774
Subject:
nitrate nitrogen,   etc   ; agricultural runoff; case studies; climate; climate change; environmental policy; landscapes; nitrogen; phosphorus; soil; temperature; water management; Saskatchewan;     Show all 13 Subjects
Abstract:
... The relative impact of climate change, agricultural inputs, crop diversity, and environment on soil nitrate-N (NO₃-N) and labile soil phosphorus (P) has seldom been assessed in the scientific literature. Furthermore crop management of plant nutrients, based on a combination of agricultural inputs and crop diversity, has not been assessed with respect to adaptation to climate change. This modeling ...
DOI:
10.1016/j.agwat.2021.106850

20. The application research of rainwater wetland based on the Sponge City

Author:
Zheng, Zhihong; Duan, Xiaohan; Lu, Shibao
Source:
The Science of the total environment 2021 v.771 pp. 144475
ISSN:
0048-9697
Subject:
nitrate nitrogen,   etc   ; ammonium nitrogen; chemical oxygen demand; environment; gravel; landscapes; nitrogen; rain; total nitrogen; vermiculite; wetlands; zeolites;     Show all 12 Subjects
Abstract:
... In order to promote the construction of the Sponge City and strengthen the utilization of rainwater resources, this paper attempts to design a wetland that can effectively purify the rainwater. The rainwater quality of Zhengzhou was monitored to provide actual data for follow-up studies. A variety of wetlands with different plants and substrates were constructed to analyze the purification of wetl ...
DOI:
10.1016/j.scitotenv.2020.144475