Influence of sulfamethazine (SMT) on the adsorption of antimony by the black soil: Implication for the complexation between SMT and antimony

Fan, Yurui; Zheng, Chunli; Lin, Zishen; Huo, Aidi; Li, Risheng; He, Chi

doi:10.1016/j.scitotenv.2020.143318

Cited by 7 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The diffusion coefficients of K id1 for HA (0.276 mg/g.h 1/2 ) were higher than those for AHA-0.05 (0.041 mg/g.h 1/2 ) and AHA-0.1(0.039 mg/g.h 1/2 ), indicating that the deposits of CaCO 3 existing on the surface of AHA reduced the mass transfer rate of TC from the aqueous liquid to the external surface of the adsorbent. Fan et al [23] indicated that when the curve fitted by the Weber and Morris internal particle diffusion model is extended to y -axis, the intercept obtained is proportional to the thickness of the boundary layer. The larger the intercept is, the thicker the boundary layer has.…”

Section: Resultsmentioning

confidence: 99%

“…If the plot was nonlinear or linear but does not passes through the origin, the adsorption rate was controlled by film-diffusion. If the plot of B t against time was linear and passed through the origin, intraparticle diffusion controls the rate of mass transfer [23]. Based on the results from Table 1 and the insert of Figure 3(a), although the plot of B t against time was linear but the intercept of the plots of HA, AHA-0.05, and AHA-0.1, adsorption are -0.702, 0.906, and 0.845, which were significantly different from zero.…”

Section: Adsorption Kinetics and Isothermmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Aging on the Adsorption of Tetracycline by Humic Acid: Insight into the Morphology and Chemical Composition

Zheng

Cao³

et al. 2022

Adsorption Science & Technology

Self Cite

View full text Add to dashboard Cite

Tetracycline (TC) is a commonly used antibiotic and enters the soil environment continuously. As humic acid (HA) is one of the most important components in soils, it is necessary to investigate the adsorption behavior of TC by HA under different conditions. In this paper, the factor of “aging” was considered. The methodology of coating CaCO3 precipitation on the surface of HA was adopted to simulate the aging process. The adsorption kinetics and isotherm demonstrated that the uptake of TC over HA was quicker with more amount than aged HA, meaning that aging affected the mass transfer of TC from the bulk solution to the outer surface of HA as well as from HA outer surface to its interior pores. To explain the effect of aging, BET was utilized to characterize the morphology of HA and aged HA. It was found that aging resulted in a decrease in specific surface area and pore size. XPS, FTIR, and 2D-COS revealed how aging influenced the chemical composition of HA. Five kinds of functional groups carried by HA contributed to the adsorption of TC, in which the binding affinity towards TC followed the order of − COO > N − H > − C − C > C − O > O − H . These results indicated that -COO was the most sensitive adsorption site. Compared to HA, the content of -COO for aged HA decreased obviously. In summary, aging affected the morphology and chemical position of HA and consequently lead to the change in adsorption kinetics and isotherm of TC.

show abstract