An Optimal Expression for Henry Function for the Calculation of Zeta Potential

Fuyuan, 秦福元 Qin; Wei, 刘伟 Liu; Wenjing, 王文静 Wang; Thomas, John C.; Yajing, 王雅静 Wang; Jin, 申晋 Shen

doi:10.3788/aos201737.1029003

Cited by 2 publications

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“…On the basis of Ohshima’s expression, recently, Qin, et al . used the least square method to fit numerically the exact function values of eq calculated by Wiersema, and they gave an approximated Henry function as eq …”

Section: Resultsmentioning

confidence: 99%

Experimental Determination of Particle Size-Dependent Surface Charge Density for Silica Nanospheres

Shi

et al. 2018

J. Phys. Chem. C

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Surface charge densities of spherical silica nanoparticles of varied size spanning from 4.1 to 495.7 nm in NaCl solution with a concentration from 0.003 to 1.2 mM at a pH value of 8.0 were determined by converting their corresponding measured zeta potential with Poisson–Boltzmann model. The magnitude of the derived surface charge density (negative) at a given NaCl concentration of 0.225 mM decreases monotonically with the increasing particle size and reaches almost a steady value when the size exceeds 30 nm, revealing clearly the effect of the nanoparticle curvature on the surface charge density. The experimental data provide a consensus for the validity of different models describing the relation between the surface charge density and the electric potential, that is, the surface complexation model and the Poisson–Boltzmann model for the charged nanospheres in electrolyte solution. We found that if the former includes the curvature-dependent deprotonation constant of the surface silanol groups, both models would give a consistent result.

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Section: Resultsmentioning

confidence: 99%

Experimental Determination of Particle Size-Dependent Surface Charge Density for Silica Nanospheres

Shi

et al. 2018

J. Phys. Chem. C

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“…(3) Population spatial distribution, urban transportation network, green space itself and the surrounding environment are the main factors affecting the spatial differentiation of the matching degree of supply and demand of green space in urban parks, but the degree of influence varies in different regions. (4) The spatial balance of green space resources in the main urban area of Nanning is low, the level of per capita access to green space resources is insufficient, and the service level of green space needs to be improved. The matching degree between comprehensive service level and urban sustainable development is low, and there is still an imbalance between supply and demand.…”

Section: Discussionmentioning

confidence: 99%

“…At the same time, as an important part of urban landscape, the importance of urban green space to the physical, physiological, social and other aspects of urban residents has been widely confirmed [2]. The rationality of urban green space layout and the matching between supply and demand is related to the realization of residents' rights to be close to nature, leisure and recreation, and is an important factor [3][4][5] affecting residents' well-being, environmental equity and urban sustainable development.…”

Section: Introductionmentioning

confidence: 99%

Study on Spatial layout and Environmental Equity of Urban green Space in Nanning City based on GIS

Peixi

2023

E3S Web of Conf.

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Urban green space plays a vital role in urban environment. The research finds that at present, the domestic focus of urban green space is mainly focused on the internal relationship between economic, social and spatial change, but there is still a lack of attention to its impact on environmental equity. In this paper, taking Nanning City as an example, the kernel density estimation method is used to evaluate the impact of urban green space on environmental justice based on the analysis of the characteristics of urban green space layout, and explore its causes. The results show that the distribution of green space in Nanning is characterized by "overall dispersion, local concentration, more in the north and less in the south". There are deficiencies in the spatial distribution equilibrium of green space resources in the main urban area and the level of per capita access to green space resources, and the service level of green space needs to be improved.

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An Optimal Expression for Henry Function for the Calculation of Zeta Potential

Cited by 2 publications

References 0 publications

Experimental Determination of Particle Size-Dependent Surface Charge Density for Silica Nanospheres

Experimental Determination of Particle Size-Dependent Surface Charge Density for Silica Nanospheres

Study on Spatial layout and Environmental Equity of Urban green Space in Nanning City based on GIS

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