Feasibility investigation of adsorptive removal of NH4+ and NO3− species from clayey aquifer using special soils

Linggi, Laxmi; Berlin, M.; Mainak, Mallik; Roy, Shantonu; Natarajan, N.; Vasudevan, M.

doi:10.1007/s10668-020-00889-6

Cited by 10 publications

(3 citation statements)

References 37 publications

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“…The charge of ammonium ions is positive, and that of nitrate ions and soil colloids is negative. Therefore, ammonium ions were easily absorbed by soil during migration, and nitrate ions were easier to move [48][49][50]. As a result, the flow-weighted mean NH4 + -N concentration of the subsurface runoff was lower than that of the surface runoff, while NO3 --N was higher (Tables A1 and A2).…”

Section: Critical Factors Affecting Nitrogen Losses From Sloping Farm...mentioning

confidence: 99%

Critical Factors Affecting Water and Nitrogen Losses from Sloping Farmland during the Snowmelt Process

Zhao

Zhang

et al. 2023

Agronomy

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Water and nitrogen losses from farmland during the snowmelt process play a vital role in water and nitrogen management in cold regions. To explore the mechanisms and factors contributing to water and nitrogen loss from different sloping farmlands during the snowmelt period, field experiments were conducted under two slope treatments (8° and 15°), two soil water content (SWC) treatments, and two snow water equivalent (SWE) (5 mm and 10 mm) treatments in a seasonal freezing agricultural watershed of Northeast China. The results showed that during the snowmelt process, SWE was the most important factor affecting water and nitrogen production through the surface and total runoff of the sloping farmland, followed by the slope. The water and nitrogen yield in the high snow (HS) treatments ranged from 1.76 to 8.15 and 1.65 to 12.62 times higher than those in the low snow (LS) treatments. The generation of nitrogen was advanced compared with that of water induced by the preferential production of nitrogen. A higher slope promoted this preferential production function of nitrogen. Enhanced infiltration combined with the preferential yield of nitrogen resulted in a greatly decreased yield of water and nitrogen in the gentle slope and LS (GS_LS) treatments. These findings are valuable for accurately describing the water and nitrogen cycling in seasonally freezing sloping farmland.

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Section: Critical Factors Affecting Nitrogen Losses From Sloping Farm...mentioning

confidence: 99%

Critical Factors Affecting Water and Nitrogen Losses from Sloping Farmland during the Snowmelt Process

Zhao

Zhang

et al. 2023

Agronomy

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“…[1][2][3] The adsorption method has received a lot of attention in scientific research because of its good environmental and economic benefits. [4][5][6] Tyrosine (Tyr) and phenylalanine (Phe) have benzene ring structure with weak polarity, and their adsorption on solid surfaces is increasingly studied, most of the current methods employed for the removal of AA from protein hydrolysates are based on the adsorption on activated carbon, polymeric resins, zeolites and ion exchangers. [7][8][9][10] Activated carbon is a traditional porous adsorbent.…”

Section: Introductionmentioning

confidence: 99%

“…It is inevitable to accept the associated advantage and disadvantages of available treatment techniques, such as physical methods such as adsorption and membrane separation, and chemical processes such as coagulation, chemical oxidation, Froth‐flotation, oxidation, and solvent 1–3 . The adsorption method has received a lot of attention in scientific research because of its good environmental and economic benefits 4–6 …”

Section: Introductionmentioning

confidence: 99%

Adsorption kinetics, isotherms and thermodynamics of aromatic amino acids in feather hydrolysate onto modified activated carbon

Wang,

Ding,

Zhang

et al. 2023

Env Prog and Sustain Energy

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The main objective of this study was to produce low cost activated carbons for the adsorption of aromatic amino acids (AA) from feather hydrolysate. By optimizing the static adsorption conditions (time, pH and concentration) of amino acids, the adsorption amounts of tyrosine and phenylalanine reached 15.2 and 20.1 mg/g, respectively, under optimal conditions. Furthermore, it exhibits excellent reusability as it maintains a removal efficiency of 82.0% and 82.8% for tyrosine and phenylalanine after being reused 4 times. The effects of NaOH modified activated carbon (NA‐AC) on the adsorption capacity of AA in feather hydrolysate at different temperatures (298.15, 308.15, 318.15 K) were investigated, and the static adsorption kinetics curves were plotted. The adsorption isotherm (Langmuir, Freundlich model), kinetics (pseudo‐first‐order‐mode, pseudo‐second‐order‐mode, particle diffusion model) and thermodynamics were studied. The results shown that the adsorption process of AA onto NA‐AC accorded with the pseudo‐second‐order‐mode. The adsorption rate was mainly controlled by the liquid film diffusion and the particle diffusion. The adsorption isotherm accorded with the Langmuir adsorption isothermal model. Adsorption was an endothermic process, and increasing temperature was conducive to adsorption. Gibbs energy ΔG indicated that the adsorption process was spontaneous, and enthalpy △H indicated that the adsorption process was mainly physical adsorption. The proposed adsorption mechanisms provide a theoretical basis for the optimization of AA separation and purification process in feather hydrolysate by NA‐AC, which may further improve the separation and purification efficiency of other amino acids in feather hydrolysate.

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Recent advances in clay minerals for groundwater pollution control and remediation

Hu,

Liu,

Wei

et al. 2024

Environ Sci Pollut Res

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Feasibility investigation of adsorptive removal of NH4+ and NO3− species from clayey aquifer using special soils

Cited by 10 publications

References 37 publications

Critical Factors Affecting Water and Nitrogen Losses from Sloping Farmland during the Snowmelt Process

Critical Factors Affecting Water and Nitrogen Losses from Sloping Farmland during the Snowmelt Process

Adsorption kinetics, isotherms and thermodynamics of aromatic amino acids in feather hydrolysate onto modified activated carbon

Recent advances in clay minerals for groundwater pollution control and remediation

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