Adsorption of recalcitrant contaminants of emerging concern onto activated carbon: A laboratory and pilot-scale study

Diniz, Vinicíus; Cunha, Daví Gasparini Fernandes; Rath, Susanne

doi:10.1016/j.jenvman.2022.116489

Cited by 9 publications

(15 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pseudo-second-order model is better suited to describe the adsorption kinetics of caffeine onto the PSP, which also suggests that the adsorption process was governed by chemical adsorption 35 . The good fitting coefficients of the Elovich model are also an indicator of a chemisorption process 14 , 36 , 37 . Furthermore, achieving a good fit to the Elovich model holds significant recognition as evidence of sorption site heterogeneity 38 .…”

Section: Resultsmentioning

confidence: 98%

“…As previously reported by Diniz et al . 14 , caffeine is chemically stable under the entire range of pH studied. The influence of ionic strength was studied considering the range of NaCl concentration of 0.01–10 g L −1 .…”

Section: Methodsmentioning

confidence: 93%

“…The investigation of the point of zero charge (PZC) of the PSPs was determined according to Diniz et al . 14 . Briefly, a 300 mL solution containing 0.01 mol L −1 NaCl was evenly distributed into 10 mL glass vials (10 mL per vial).…”

Section: Methodsmentioning

confidence: 99%

“…The thermodynamic studies mirrored those at 25 °C, and control samples were employed at each temperature to confirm caffeine stability. The influence of pH on the adsorption of caffeine onto the PSPs was studied in the pH range of 1–10, maintaining the ionic strength constant at 0.5 mol L −1 14 . The concentration of caffeine and PSPs were 7.5 mg L −1 and 250 mg L −1 , respectively.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Porous sulfur polymers for effective aqueous-phase organic contaminant removal

Diniz,

Bear,

Rath

et al. 2024

Sci Rep

Self Cite

View full text Add to dashboard Cite

Sulfur polymers produced through 'inverse vulcanization' exhibit various attributes, such as photocatalytic activity and a high capacity to adsorb heavy metals. Nevertheless, there is a lack of research investigating the use of sulfur polymers as materials for the removal of organic contaminants. In this work, porous sulfur polymers (PSPs) were synthesized from elemental sulfur and 1,3-diisopropenylbenzene, with porosity introduced via salt templating. The result is a material that can strongly adsorb and chemically neutralize a model organic contaminant (caffeine). PSPs show adsorption up to 5 times higher than a leading adsorption material (activated carbon). Furthermore, either the adsorption or degradation processes can govern the removal efficiency depending on the synthesis parameters of PSPs. This is the first-ever report demonstrating sulfur polymers as effective materials for removing emerging contaminants from water. The versatile synthesis of sulfur polymers offers variation, which means that there is much more to explore in this exciting research area.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Porous sulfur polymers for effective aqueous-phase organic contaminant removal

Diniz,

Bear,

Rath

et al. 2024

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hydrophobic PPCPs are adsorbed through hydrophobic interactions, regardless of pHpzc. Water treatment processes can optimize DCF adsorption by adjusting the solution pH below the pHpzc of the adsorbent to maximize electrostatic attraction (Diniz et al., 2023; Liu et al., 2023).…”

Section: Resultsmentioning

confidence: 99%

Effect of oxidated golden shower on the adsorption of diclofenac sodium in wastewater

Arliyani,

Syaifuddin,

Ni'am

et al. 2023

Environmental Quality Mgmt

View full text Add to dashboard Cite

This research aimed to modify activated carbon into oxidated activated carbon because it can effectively remove diclofenac sodium (DCF) and increase the adsorption capability. In this study of the several variations of initial concentration and contact time, those variations affected the optimal result. To determine, the removal efficiency of diclofenac sodium used Golden Shower Activated Carbon based on the contact time variation and the optimum contact time compared to Golden Shower Oxidated Activated Carbon as adsorbent on the batch method and to know the isotherm model and the kinetic model of the adsorbent on the adsorption in diclofenac sodium solution. The pHPZC for GSHAC and GSHOAC were 2.4 and 9.3. The optimum contact time for GSHAC was 225 min with the capacity (qt = 184.71 mg/g). The optimum contact time for GSHOAC was 169 min with the capacity (qt = 188.34 mg/g). The Isotherm model, kinetics model, and the physical characterization of the biosorbent were thoroughly investigated. The isotherm model chosen in the adsorption process for GSHAC and GSHOAC was the Langmuir model (R2 = 0.985 and R2 = 0.973). The pseudo‐second‐order for GSHAC and GSHOAC was confirmed to be a kinetic pseudo‐second‐order model of the adsorption with R2 values of 0.9566 and 0.9986. The model represents that the reaction from the adsorbent to the solution was double the initial concentration. Based on SEM analysis after the adsorption process, it was found that flakes of adsorbent before adsorption had many layers of pores, causing an irregular texture after adsorption showed that GSHAC and GSHOAC were fragmented and had many layers of pores that were closed and tight because it adsorbed DCF.

show abstract