PubAg

Main content area

You searched for: Subject "fulvic acids" Remove constraint Subject: "fulvic acids"
Start Over

Search

1,306  Search Results

| 41 - 60 of 1,306 |
Number of results to display per page

Search Results

41. Research on complexation ability, aromaticity, mobility and cytotoxicity of humic-like substances during degradation process by electrochemical oxidation

Author:
Deng, Yang; Chen, Nan; Feng, Chuanping; Chen, Fangxin; Wang, Haishuang; Feng, Zhengyuan; Zheng, Yuhan; Kuang, Peijing; Hu, Weiwu
Source:
Environmental pollution 2019 v.251 pp. 811-820
ISSN:
0269-7491
Subject:
fulvic acids,   etc   ; bacteria; chlorine; cytotoxicity; electrochemistry; electrolysis; hydrogen bonding; hydrophobicity; landfill leachates; luminescence; moieties; oxidation; quinones; risk; sewage; toxicity testing; wastewater;     Show all 17 Subjects
Abstract:
... The humic-like substances were the main organic components in most wastewater (e.g. domestic sewage, toilet wastewater and landfill leachate). Two types of actual humic-like substances (fulvic acid (FA) and biologically treated landfill leachate (BTLL)) were selected to describe the changes in the properties of humic-like substances (complexation ability, aromaticity and mobility) during electroch ...
DOI:
10.1016/j.envpol.2019.05.047

42. Effects of multi-walled carbon nanotubes on metal transformation and natural organic matters in riverine sediment

Author:
Xu, Piao; Chen, Ming; Zeng, Guangming; Huang, Danlian; Lai, Cui; Wang, Ziwei; Yan, Ming; Huang, Zhenzhen; Gong, Xiaomin; Song, Biao; Li, Tao; Duan, Abing
Source:
Journal of hazardous materials 2019 v.374 pp. 459-468
ISSN:
0304-3894
Subject:
fulvic acids,   etc   ; bioavailability; biochemical polymorphism; cadmium; carbon nanotubes; chemical structure; dose response; humic acids; humification; hydrophobicity; microbial activity; risk; sediments; toxicity;     Show all 14 Subjects
Abstract:
... In this study, pragmatic prospection of multi-walled carbon nanotubes (MWCNTs) is conducted considering their impacts on Cd transformation, microbial activity and natural organic matter (NOM) in sediments. Indeed, dose-dependent of MWCNTs acceleration in Cd sedimentation and immobilization in water–sediment interface has been found. Unexpectedly, even with the reduced Cd bioavailability, high rati ...
DOI:
10.1016/j.jhazmat.2019.04.037

43. Application of MgO-modified palygorskite for nutrient recovery from swine wastewater: effect of pH, ions, and organic acids

Author:
Wang, Hao; Wang, Xuejiang; Zhao, Jianfu
Source:
Environmental science and pollution research international 2019 v.26 no.19 pp. 19729-19737
ISSN:
0944-1344
Subject:
fulvic acids,   etc   ; acetic acid; ammonium nitrogen; calcium; carbonates; cations; citric acid; crystallization; humic acids; magnesium; pH; palygorskite; phosphates; potassium; sodium; sulfates; swine; wastewater;     Show all 18 Subjects
Abstract:
... In this study, MgO-modified palygorskite (MgO-PAL) was used for simultaneous recovery of ammonia nitrogen (AN) and phosphate, and the effects of pH, ions, and organic acids on nutrient recovery were investigated. The highest removal amount of AN and phosphate separately reached 42.6 mg/g and 69.8 mg/g at pH of 9.0, 0.6 g/L dosage of modified palygorskite, and 180 min of the reaction time. MgO-PAL ...
DOI:
10.1007/s11356-019-05254-3

44. Plant Biostimulants: Importance of the Quality and Yield of Horticultural Crops and the Improvement of Plant Tolerance to Abiotic Stress—A Review

Author:
Drobek, Magdalena; Frąc, Magdalena; Cybulska, Justyna
Source:
Agronomy 2019 v.9 no.6
ISSN:
2073-4395
Subject:
fulvic acids,   etc   ; active ingredients; air pollution; bacteria; crop yield; fermentation; fungi; horticultural crops; hydrolysis; nitrogen; plant extracts; plant growth; protein hydrolysates; soil; soil biota; soil degradation; synergism;     Show all 17 Subjects
Abstract:
... Biostimulants are among the natural preparations that improve the general health, vitality, and growth of plants and protect them against infections. They can be successfully used in both agri- and horticultural crops. The main active substances used in such preparations are humic and fulvic acids, protein hydrolysates, compounds containing nitrogen, seaweed extracts, beneficial fungi, and bacteri ...
DOI:
10.3390/agronomy9060335

45. Understanding major NOM properties controlling its interactions with phosphorus and arsenic at goethite-water interface

Author:
Deng, Yingxuan; Weng, Liping; Li, Yongtao; Ma, Jie; Chen, Yali
Source:
Water research 2019 v.157 pp. 372-380
ISSN:
0043-1354
Subject:
fulvic acids,   etc   ; adsorption; arsenates; arsenic; arsenites; goethite; humic acids; iron oxides; ligands; models; oxyanions; pH; particle size; phosphates; phosphorus; protonation; wastewater;     Show all 17 Subjects
Abstract:
... Among natural organic matter (NOM), oxyanions and metal (hydr)oxides, a complicated interaction exists in natural aquatic and terrestrial systems and in waste waters. Effects of seven types of NOM (four humic acids (HA), three fulvic acids (FA)) that vary in properties on the adsorption of oxyanions, including phosphate, arsenate and arsenite, at goethite-water interface were quantitatively studie ...
DOI:
10.1016/j.watres.2019.03.077

46. Aggregation and dissolution of engineering nano Ag and ZnO pretreated with natural organic matters in the simulated lung biological fluids

Author:
Zhong, Laijin; Hu, Xin; Cao, Zhaoming; Wang, Hongwei; Chen, Yijun; Lian, Hong-zhen
Source:
Chemosphere 2019 v.225 pp. 668-677
ISSN:
0045-6535
Subject:
fulvic acids,   etc   ; Raman spectroscopy; X-ray diffraction; breathing; citric acid; humans; ions; lungs; nanoparticles; nanosilver; particle size; risk; silver; tartaric acid; transmission electron microscopes; zinc; zinc oxide;     Show all 17 Subjects
Abstract:
... The increasing application of engineered nanoparticles such as silver nanoparticles (nAg) and zinc oxide nanoparticles (nZnO), results in their accumulation in environmental media. The environmental natural organic matter (NOM) adsorbed by these nanoparticles may have great effects on the aggregation and dissolution of metall ions, which are interesting and important for the assessment of the inha ...
DOI:
10.1016/j.chemosphere.2019.03.080

47. Evaluation of algal photosynthesis inhibition activity for dissolved organic matter with the consideration of inorganic and coloring constituents

Author:
Misaki, Kentaro; Morita, Yuhei; Kobayashi, Kentaro; Sugawara, Yuichi; Shimizu, Yoshihisa; Kusakabe, Taketoshi
Source:
Chemosphere 2019 v.224 pp. 333-342
ISSN:
0045-6535
Subject:
fulvic acids,   etc   ; Chlamydomonas; algae; aquatic ecosystems; dissolved organic matter; filtrates; growth retardation; ingredients; lakes; monitoring; photosystem II; rivers; sewage; ultrafiltration; washing; wastewater treatment;     Show all 16 Subjects
Abstract:
... The effect of waterborne ingredient on ecosystem has been of great interest. In the present study, the evaluation method using algal photosynthesis inhibition assay with dual-channel pulse amplitude modulation (PAM) system was established for a series of water samples to elucidate the potential effect of the total body of organic compounds including natural organic matter (NOM) on aquatic ecosyste ...
DOI:
10.1016/j.chemosphere.2019.02.106

48. Kinetic aspects of humic substances derived from macrophyte detritus decomposition under different nutrient conditions

Author:
Bottino, Flávia; Cunha-Santino, Marcela Bianchessi; Bianchini, Irineu, Jr
Source:
Environmental science and pollution research international 2019 v.26 no.16 pp. 15931-15942
ISSN:
0944-1344
Subject:
fulvic acids,   etc   ; Paspalum; Pistia stratiotes; aquatic ecosystems; detritus; eutrophication; freshwater; humic acids; humification; kinetics; macrophytes; mineralization; nutrient availability; particulate organic carbon; photoperiod; primary productivity;     Show all 16 Subjects
Abstract:
... Autochthonous particulate organic carbon (POC) is an important precursor of humic substances (HS), and macrophytes represent the major source of POC in tropical aquatic ecosystems. Autochthonous HS influence the carbon supply, light regime, and primary production within freshwater systems. This study addresses the conversion of POC from two macrophyte species into HS and their mineralization under ...
DOI:
10.1007/s11356-019-04882-z

49. Relevance of dissolved organic matter generated from green manuring of Chinese milk vetch in relation to water-soluble cadmium

Author:
Xie, Jie; Dong, Aiqin; Liu, Jia; Su, Jinping; Hu, Po; Xu, Changxu; Chen, Jingrui; Wu, Qitang
Source:
Environmental science and pollution research international 2019 v.26 no.16 pp. 16409-16421
ISSN:
0944-1344
Subject:
fulvic acids,   etc   ; Astragalus; cadmium; dissolved organic matter; flowering; fluorescence; gravity; humic acids; molecular weight; principal component analysis; soil; soil pollution; soil solution; tryptophan; ultraviolet-visible spectroscopy; water solubility;     Show all 16 Subjects
Abstract:
... Dissolved organic matter (DOM) can become a carrier of soil contaminants. Therefore, an understanding of the evolution and characteristics of DOM produced by Chinese milk vetch during green manuring is crucial. In this study, DOM solutions from 28 days’ manuring with three different organic materials were characterized using three-dimensional fluorescence excitation–emission matrix (3D-EEM) with p ...
DOI:
10.1007/s11356-019-05114-0

50. Charging, aggregation, and aggregate strength of humic substances in the presence of cationic surfactants: Effects of humic substances hydrophobicity and surfactant tail length

Author:
Hakim, Azizul; Kobayashi, Motoyoshi
Source:
Colloids and surfaces 2019
ISSN:
0927-7757
Subject:
fulvic acids,   etc   ; carbon; cationic surfactants; cations; cetylpyridinium chloride; electrophoresis; electrostatic interactions; flocculation; humic acids; hydrophobic bonding; hydrophobicity; isoelectric point; pH; rivers;     Show all 14 Subjects
Abstract:
... The binding of natural organic matters (NOM) with organic cations and resulting changes in charging and aggregation of NOMs are important in water science and technology such as the enhanced settling by flocculation and the fate control of contaminants. We measured the electrophoretic mobility and aggregate strength of humic substances (HSs), Suwannee river fulvic acid (SRFA) and Leonardite humic ...
DOI:
10.1016/j.colsurfa.2019.05.071

51. Organic carbon content and humus composition after application aluminum sulfate and rice straw to soda saline-alkaline soil

Author:
Zhao, Xingmin; Zhu, Menglong; Guo, Xinxin; Wang, Hongbin; Sui, Biao; Zhao, Lanpo
Source:
Environmental science and pollution research international 2019 v.26 no.14 pp. 13746-13754
ISSN:
0944-1344
Subject:
fulvic acids,   etc   ; alkaline soils; aluminum sulfate; heat; humic acids; humification; humus; oxidation; potassium; rice straw; saline soils; soil organic carbon; titration;     Show all 13 Subjects
Abstract:
... The soil organic carbon accumulation in soda saline-alkaline soil and the humus composition changes with application of aluminum sulfate and rice straw were investigated by the controlled simulative experiments in laboratory. For evaluating the amelioration effect, organic carbon content and humus composition in soda saline-alkaline soil were investigated with different application amounts of rice ...
DOI:
10.1007/s11356-018-2270-1

52. Mechanistic Insight into the Effect of Metal Ions on Photogeneration of Reactive Species from Dissolved Organic Matter

Author:
Wan, Dong; Sharma, Virender K.; Liu, Lu; Zuo, Yuegang; Chen, Yong
Source:
Environmental science & technology 2019 v.53 no.10 pp. 5778-5786
ISSN:
1520-5851
Subject:
fulvic acids,   etc   ; aluminum; binding capacity; calcium; chromium; copper; dissolved organic matter; humic acids; hydroxyl radicals; iron; magnesium; manganese; metal ions; pollutants; singlet oxygen; zinc;     Show all 16 Subjects
Abstract:
... The photogeneration of reactive species (RS) from dissolved organic matter (DOM) exhibits a great impact on the attenuation of pollutants in natural waters. However, the effect of metal ions on the photogeneration of excited triplet-state DOM (³DOM*), singlet oxygen (¹O₂), and hydroxyl radical (•OH) by effluent organic matter (EfOM), fulvic acid (FA), and humic acid (HA) is poorly understood. Here ...
DOI:
10.1021/acs.est.9b00538

53. Onsite quantifying electron donating capacity of dissolved organic matter

Author:
Yuan, Ying; Zhang, Hao; Wei, Yuquan; Si, Yanxiao; Li, Guanghe; Zhang, Fang
Source:
The Science of the total environment 2019 v.662 pp. 57-64
ISSN:
0048-9697
Subject:
fulvic acids,   etc   ; chemical oxygen demand; dissolved organic matter; electrochemistry; flow injection analysis; groundwater; humic acids; humification; molecular weight; oxidation; portable equipment; sediments; soil; surface water; wetlands;     Show all 15 Subjects
Abstract:
... Electron donating capacity (EDC) of dissolved organic matter (DOM) impacts the redox behaviors of DOM in surface waters, groundwaters, wetlands, sediments and soils but lacks applicable onsite quantification methods. To address these disadvantages, a simple and portable device with pre-injected [2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonicacid), ABTS·+] was developed that can be used for EDC o ...
DOI:
10.1016/j.scitotenv.2019.01.178

54. Humic Substances Facilitate Arsenic Reduction and Release in Flooded Paddy Soil

Author:
Qiao, Jiangtao; Li, Xiaomin; Li, Fangbai; Liu, Tongxu; Young, Lily Y.; Huang, Weilin; Sun, Ke; Tong, Hui; Hu, Min
Source:
Environmental science & technology 2019 v.53 no.9 pp. 5034-5042
ISSN:
1520-5851
Subject:
fulvic acids,   etc   ; Anaeromyxobacter; Azoarcus; Geobacter; Pseudomonas; anaerobic conditions; arsenates; arsenic; genes; humic acids; humin; iron; labile carbon; messenger RNA; microbial activity; paddy soils; transcription (genetics);     Show all 17 Subjects
Abstract:
... Organic matter is important for controlling arsenic reduction and release under anoxic conditions. Humic substances (HS) represent an important fraction of natural organic matter, yet the manner in which HS affect arsenic transformation in flooded paddy soil has not been thoroughly elucidated. In this study, anaerobic microcosms were established with arsenic-contaminated paddy soil and amended wit ...
DOI:
10.1021/acs.est.8b06333

55. Trace metals complexation behavior with root exudates induced by salinity from a mangrove plant Avicennia marina (Forsk.) Vierh

Author:
Zhu, Chun-Quan; Ghoto, Kabir; Gao, Gui-Feng; Chen, Juan; Hu, Wen-Jun; Qiao, Fang; Liu, Ji-Yun; Zheng, Hai-Lei
Source:
Bioremediation journal 2019 v.23 no.2 pp. 82-93
ISSN:
1547-6529
Subject:
fulvic acids,   etc   ; Avicennia marina; binding capacity; bioremediation; cadmium; copper; fluorescence; fluorescence emission spectroscopy; ions; manganese; root exudates; roots; salinity; seedlings; sodium chloride;     Show all 15 Subjects
Abstract:
... This study investigated the characteristics of exudates from mangrove plant Avicennia marina seedling roots under 0, 200 and 600 mM NaCl treatments and their complexation behavior with trace metals using excitation emission matrix (EEM) fluorescence spectrometry. Two fulvic-like fluorescence peaks, namely peak A (Em = 440 nm, Ex = 250 nm, UV fulvic-like compounds) and peak B (Em = 440 nm, Ex = 340 ...
DOI:
10.1080/10889868.2019.1602108

56. Adaptive evolution of microalgal strains empowered by fulvic acid for enhanced polyunsaturated fatty acid production

Author:
Wang, Xiang; Luo, Shan-Wei; Luo, Wanghaoyun; Yang, Wei-Dong; Liu, Jie-Sheng; Li, Hong-Ye
Source:
Bioresource technology 2019 v.277 pp. 204-210
ISSN:
0960-8524
Subject:
fulvic acids,   etc   ; Bacillariophyceae; acid treatment; antioxidant activity; biochemical pathways; biosynthesis; eicosapentaenoic acid; evolutionary adaptation; genes; metabolic engineering; microalgae; salinity; temperature; value-added products;     Show all 14 Subjects
Abstract:
... Microalgae have emerged as the potential source for value-added products such as polyunsaturated fatty acids (PUFAs). Metabolic engineering of multiple metabolic pathways has promoted eicosapentaenoic acid (EPA) production in microalgae, however, further improvement is warranted owing to the burgeoning demand. Here we improved the microalgal strains by adaptive evolution under hyposalinity treatme ...
DOI:
10.1016/j.biortech.2018.12.116

57. Adsorption behaviors of Eu(III) on granite: batch, electron probe micro-analysis and modeling studies

Author:
Li, Hong; He, Bihong; Li, Ping; Fan, Qiaohui; Wu, Hanyu; Liang, Jianjun; Liu, Chunli; Yu, Tao
Source:
Environmental earth sciences 2019 v.78 no.8 pp. 249
ISSN:
1866-6280
Subject:
fulvic acids,   etc   ; X-ray diffraction; actinides; adsorption; biotite; environmental factors; europium; granite; ion exchange; models; pH; quartz; radioactive waste; radionuclides; soil; China;     Show all 16 Subjects
Abstract:
... Although granite has been widely considered as the host rock of the high-level radioactive waste (HLRW) repository in the world, the adsorption behaviors of radionuclides on granite are quite complicated and still unclear, especially at molecular scales. In this study, the adsorption behaviors of europium(III) on Beishan granite (BSG), a preliminary selection of host rock for the HLRW repository i ...
DOI:
10.1007/s12665-019-8170-y

58. Effects of fulvic acid and fulvic ions on Escherichia coli survival in river under repeated freeze-thaw cycles

Author:
Wang, Xu; Zhang, Dongyan; Chen, Weiwei; Tao, Jiahui; Xu, Meng; Guo, Ping
Source:
Environmental pollution 2019 v.247 pp. 1100-1109
ISSN:
0269-7491
Subject:
fulvic acids,   etc   ; Escherichia coli; catalase; crystals; detection limit; freeze-thaw cycles; hydrophobicity; ice; ions; reactive oxygen species; river water; rivers; superoxide dismutase; virulent strains;     Show all 14 Subjects
Abstract:
... The effects of fulvic acid (FA) and ions on mesophilic pathogenic bacteria survival under freeze-thaw (FT) stress in natural water and its resistant mechanisms are rarely understood. Therefore, survival patterns of Escherichia coli in river water added with various concentrations of FA or FA-ion under FT stress were studied in this work. Meanwhile, cell surface hydrophobicity (CSH), unit activitie ...
DOI:
10.1016/j.envpol.2019.01.005

59. Modeling kinetics of Ni dissociation from humic substances based on WHAM 7

Author:
Wang, Pei; Ding, Yang; Liu, Minqin; Liang, Yuzhen; Shi, Zhenqing
Source:
Chemosphere 2019 v.221 pp. 254-262
ISSN:
0045-6535
Subject:
fulvic acids,   etc   ; binding sites; bioavailability; data analysis; dissociation; dissolved organic matter; humic acids; ionic strength; ions; ligands; models; nickel; pH; prediction;     Show all 14 Subjects
Abstract:
... Understanding the kinetics of Ni dissociation from dissolved organic matter (DOM) helps to better predict the fate and bioavailability of Ni ions in the environment. However, there is still a lack of predictive models for the kinetics of Ni dissociation from DOM under different reaction conditions. In this study, kinetics of Ni dissociation from humic acids (HA) and fulvic acids (FA), two most imp ...
DOI:
10.1016/j.chemosphere.2019.01.012

60. Soil organic matter composition as a factor affecting the accumulation of polycyclic aromatic hydrocarbons

Author:
Ukalska-Jaruga, Aleksandra; Smreczak, Bożena; Klimkowicz-Pawlas, Agnieszka
Source:
Journal of soils and sediments 2019 v.19 no.4 pp. 1890-1900
ISSN:
1439-0108
Subject:
fulvic acids,   etc   ; agricultural soils; clay fraction; combustion; humic acids; liquids; molecular weight; polycyclic aromatic hydrocarbons; soil carbon; soil organic matter; soil sampling; sorption; total nitrogen; total organic carbon;     Show all 14 Subjects
Abstract:
... PURPOSE: The objective of this study was to evaluate the mutual relations between the soil organic matter (SOM) fractions: fulvic acids (FA), humic acids (HA), humins (HN), black carbon (BC) and the polycyclic aromatic hydrocarbons (PAH) accumulation level in agricultural soils influenced by historical and actual anthropopressure. The research allowed to indicate which fractions of SOM are the maj ...
DOI:
10.1007/s11368-018-2214-x