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Effects of oxidizing environment on digestate humification and identification of substances governing the dissolved organic matter (DOM) transformation process

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1520-0

Abstract:

• Liquid digestate humification was investigated under different oxidizing environment.

Keywords： Liquid digestate     MnO2     Oxygen     DOM transformation     Humic-like acids    

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Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementary

Yuning YANG,Huan LI,Jinyi LI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 854-862 doi: 10.1007/s11783-014-0755-9

Abstract: The results showed that the total contents of humic and fulvic acids in the sludge almost remained constantduring thermal treatment, but 35% of humic and fulvic acids were dissolved from the sludge solids.Moreover, both humic and fulvic acids were partly decomposed and 32% of humic acids were converted toThe median value of the molecular weights of humic acids decreased from 81 to 41 kDa and that of fulvicBesides the reduction in molecular size, the chemical structures of humic and fulvic acids also exhibited

Keywords： sludge     thermal treatment     humic acids     fulvic acids    

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Effects of water quality on the coagulation performances of humic acids irradiated with UV light

Wendong WANG,Qinghai FAN,Zixia QIAO,Qin YANG,Yabo WANG,Xiaochang WANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1,   Pages 147-154 doi: 10.1007/s11783-014-0749-7

Abstract: The presence of humic acid in drinking water treatment has received significant attention in recent yearspaper, the effects of water quality including pH, turbidity, alkalinity, and hardness on the removal of humicOur results suggested that UV light radiation could effectively improve the removal rate of humic acidAfter UV light radiation, the removal rate of the nitro-humic acid (NHA) increased from 20% to 60% inIn addition to NHA, the removal rates of the humic acid extracted from peat coal (PHA) and the humic

Keywords： coagulation     drinking water     humic acid     UV light radiation     water quality    

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Effect of metal ion-doping on characteristics and photocatalytic activity of TiO

Rongfang YUAN,Beihai ZHOU,Duo HUA,Chunhong SHI

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 850-860 doi: 10.1007/s11783-014-0737-y

Abstract: nanotubes were investigated to obtain the optimal TiO nanotubes for the effective decomposition of humicacids (HA) through O /UV/ion-doped TiO process.

Keywords： TiO2 nanotubes     ion-doping     humic acids     pseudo-first-order     mechanism    

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Bile acids and their effects on diabetes

Cynthia Rajani, Wei Jia

Frontiers of Medicine 2018, Volume 12, Issue 6,   Pages 608-623 doi: 10.1007/s11684-018-0644-x

Abstract: Diabetes is a widespread, rapidly increasing metabolic disease that is driven by hyperglycemia. Early glycemic control is of primary importance to avoid vascular complications including development of retinal disorders leading to blindness, end-stage renal disease, and accelerated atherosclerosis with a higher risk of myocardial infarction, stroke and limb amputations. Even after hyperglycemia has been brought under control, “metabolic memory,” a cluster of irreversible metabolic changes that allow diabetes to progress, may persist depending on the duration of hyperglycemia. Manipulation of bile acid (BA) receptors and the BA pool have been shown to be useful in establishing glycemic control in diabetes due to their ability to regulate energy metabolism by binding and activating nuclear transcription factors such as farnesoid X receptor (FXR) in liver and intestine as well as the G-protein coupled receptor, TGR5, in enteroendocrine cells and pancreatic -cells. The downstream targets of BA activated FXR, FGF15/21, are also important for glucose/insulin homeostasis. In this review we will discuss the effect of BAs on glucose and lipid metabolism and explore recent research on establishing glycemic control in diabetes through the manipulation of BAs and their receptors in the liver, intestine and pancreas, alteration of the enterohepatic circulation, bariatric surgery and alignment of circadian rhythms.

Keywords： bile acids     metabolic memory     diabetes     circadian rhythm     bariatric surgery    

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Two-step hydrothermal conversion of biomass waste to humic acid using hydrochar as intermediate

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1719-8

Abstract: Converting biomass materials to humic acid is a sustainable method for humic acid production and achieveA two-step hydrothermal treatment method was adopted in this study to produce humic acid from corn stalksTheir chemical properties were then analyzed, and the hydrochar-derived humic acids were produced under

Keywords： Biowaste     Hydrochar     Humic acid     Hydrothermal parameter     Unsaturation    

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Catalytic conversion of biomass-derived compounds to various amino acids: status and perspectives

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7,   Pages 817-829 doi: 10.1007/s11705-022-2254-z

Abstract: Amino acids are important nitrogen-containing chemicals that have a variety of applications.Currently, fermentation is the widely employed method to produce amino acids; however, the products aremostly limited to natural amino acids in the L-configuration.Catalytic synthesis is an alternative approach for the synthesis of amino acids with different typesand α-hydroxyl acids, have been transformed into amino acids via the amination reaction in the

Keywords： biomass     amino acids     chitin     nitrogen-containing compounds     lignocellulose    

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Electrochemical oxidation of humic acid at the antimony- and nickel-doped tin oxide electrode

TANG Chengli,YAN Wei,ZHENG Chunli

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 337-344 doi: 10.1007/s11783-013-0545-9

Abstract: This work investigated the degradation of humic acid (HA) in aqueous solution by electrochemical oxidation

Keywords： electrochemical oxidation     humic acid (HA)     natural water     Ni-Sb-SnO2/Ti electrode    

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Effects of humic acid on residual Al control in drinking water treatment plants with orthophosphate addition

Wendong WANG, Hua LI, Zhenzhen DING, Xiaochang WANG, Rui LIU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4,   Pages 470-476 doi: 10.1007/s11783-012-0422-y

Abstract: This study aimed to investigate the effects of humic acid (HA) on residual Al control in drinking water

Keywords： coagulation     drinking water     humic acid     orthophosphate     residual Al    

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Evolution of humic substances in polymerization of polyphenol and amino acid based on non-destructive

Jianmei Zou, Jianzhi Huang, Huichun Zhang, Dongbei Yue

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1297-y

Abstract: • Humification process from precursors to fulvic and humic acid was confirmed. • MnO2 alone had limitedwas to use non-destructive measurement methods to investigate the role of MnO2 in the evolution of humicidentified that MnO2 alone had a limited ability in accelerating the transformation of fulvic acid (FA) to humic

Keywords： Two-dimensional correlation spectroscopy (2D-COS)     Humic substances (HSs)     Humification     Manganese dioxide    

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Anaerobic digestion of sludge by different pretreatments: Changes of amino acids and microbial community

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1458-7

Abstract:

•Tryptophan protein, and aromatic protein I/II were the key identified proteins.

Keywords： Sludge pretreatments     Dissolved organic nitrogen     Proteins     Amino acids     Structural equation model     Metagenomic    

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Characterization of soil low-molecular-weight organic acids in the Karst rocky desertification region

Xiaoliang LI, Xiaomin CHEN, Xia LIU, Lianchuan ZHOU, Xinqiang YANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 195-203 doi: 10.1007/s11783-012-0391-1

Abstract: Soil low-molecular-weight (LMW) organic acids play important roles in the soil-forming process and theIn this study, we quantified the contents of LMW organic acids (including lactate, acetate, formate,The concentration of total LMW organic acids in topsoil solution ranged from 0.358 to 1.823 μmol·g ,The concentrations of the LMW organic acids were significantly positive correlated each other.Significant positive correlations were also observed among individual LMW organic acids in soil solution

Keywords： Karst rocky desertification     low-molecular-weight (LMW) organic acids     distribution characteristics     soil    

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Abiotic association of phthalic acid esters with humic acid of a sludge landfill

Xiaoli CHAI, Yongxia HAO, Xin ZHAO, Guixiang LIU, Ying ZHU, Rong JI, Jun WU, Huanhuan TONG, Youcai ZHAO

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 6,   Pages 778-783 doi: 10.1007/s11783-012-0434-7

Abstract: The abiotic association between phthalic acid esters (PAEs) and humic substances (HS) in sludge landfillstudy the abiotic association of two abundant PAEs (diethyl phthalate and di- -butyl phthalate) with humic

Keywords： abiotic association     phthalic acid esters (PAEs)     humic acid     sludge     landfill    

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Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production

Supriyono SUWITO, Giuliano DRAGONE, Hary SULISTYO, Bardi MURACHMAN, Suryo PURWONO, José TEIXEIRA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 2,   Pages 210-215 doi: 10.1007/s11705-012-1282-5

Abstract: A central composite rotatable design and response surface methodology were used in order to investigate the individual and combined effects of the ethanol-to-oil ratio, H SO concentration, temperature and time of reaction on the reduction of free fatty acid (FFA) in jatropha oil. A quadratic polynomial model relating the reaction variables with FFA reduction was developed, presenting a good coefficient of determination ( = 0.893). For reducing FFA to less than 1%, the optimal combination was found to be 0.62 v·v ethanol-to-oil ratio (14.9 v·v ethanol-to-FFA ratio), 1.7% v·v H SO concentration, and 79 min reaction time at a reaction temperature of 54°C. These results are of great relevance to maximize methyl esters formation by transesterification using an alkaline catalyst.

Keywords： biodiesel     biofuel     esterification     free fatty acids     jatropha curcas oil    

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Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative couplingof benzoic acids using sodium chlorite as oxidant

Yun Liu, Youquan Zhu, Chaojun Li

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 3-8 doi: 10.1007/s11705-017-1693-4

Abstract: A mild and efficient synthesis for the biaryl acids via rhodium-catalyzed cross-dehydrogenative coupling

Keywords： biaryl acids     cross-dehydrogenative coupling     rhodium-catalyzed    

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Title Author Date Type Operation

Effects of oxidizing environment on digestate humification and identification of substances governing the dissolved organic matter (DOM) transformation process

Journal Article

Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementary

Yuning YANG,Huan LI,Jinyi LI

Journal Article

Effects of water quality on the coagulation performances of humic acids irradiated with UV light

Wendong WANG,Qinghai FAN,Zixia QIAO,Qin YANG,Yabo WANG,Xiaochang WANG

Journal Article

Effect of metal ion-doping on characteristics and photocatalytic activity of TiO

Rongfang YUAN,Beihai ZHOU,Duo HUA,Chunhong SHI

Journal Article

Bile acids and their effects on diabetes

Cynthia Rajani, Wei Jia

Journal Article

Two-step hydrothermal conversion of biomass waste to humic acid using hydrochar as intermediate

Journal Article

Catalytic conversion of biomass-derived compounds to various amino acids: status and perspectives

Journal Article

Electrochemical oxidation of humic acid at the antimony- and nickel-doped tin oxide electrode

TANG Chengli,YAN Wei,ZHENG Chunli

Journal Article

Effects of humic acid on residual Al control in drinking water treatment plants with orthophosphate addition

Wendong WANG, Hua LI, Zhenzhen DING, Xiaochang WANG, Rui LIU

Journal Article

Evolution of humic substances in polymerization of polyphenol and amino acid based on non-destructive

Jianmei Zou, Jianzhi Huang, Huichun Zhang, Dongbei Yue

Journal Article

Anaerobic digestion of sludge by different pretreatments: Changes of amino acids and microbial community

Journal Article

Characterization of soil low-molecular-weight organic acids in the Karst rocky desertification region

Xiaoliang LI, Xiaomin CHEN, Xia LIU, Lianchuan ZHOU, Xinqiang YANG

Journal Article

Abiotic association of phthalic acid esters with humic acid of a sludge landfill

Xiaoli CHAI, Yongxia HAO, Xin ZHAO, Guixiang LIU, Ying ZHU, Rong JI, Jun WU, Huanhuan TONG, Youcai ZHAO

Journal Article

Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production

Supriyono SUWITO, Giuliano DRAGONE, Hary SULISTYO, Bardi MURACHMAN, Suryo PURWONO, José TEIXEIRA

Journal Article

Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative couplingof benzoic acids using sodium chlorite as oxidant

Yun Liu, Youquan Zhu, Chaojun Li

Journal Article