Evaluation of mercury (Hg2+) adsorption capacity using exhausted coffee waste

Alvarez, Nubia María Mora; Pastrana, Johnny Marcelo; Lagos, Yolanda; Lozada, Juan José

doi:10.1016/j.scp.2018.09.004

Cited by 51 publications

(21 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Up to present, the adsorption technology has made great progress and it has unique advantages in the treatment of heavy metals and mercury [ 8 , 12 ]. And, adsorption technology has been largely applied to remove heavy metals and mercury in wastewater [ 6 , 13 ]. Common adsorbents in adsorption technology have been widely studied and applied, and include activated carbon [ 14 ], CNT [ 15 ], cellulose [ 16 ], titanium dioxide [ 17 ], silica gel [ 18 ], coffee waste [ 13 , 19 ], alkynyl carbon [ 20 ], clay [ 21 ], chitosan [ 22 ], functional groups [ 5 , 23 , 24 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Removal of Hg2+ with Polypyrrole-Functionalized Fe3O4/Kaolin: Synthesis, Performance and Optimization with Response Surface Methodology

et al. 2020

View full text Add to dashboard Cite

PPy-Fe3O4/Kaolin was prepared with polypyrrole functionalized magnetic Kaolin by a simple, green, and low cost method to improve the agglomeration and low adsorption capacity of Kaolin. PPy-Fe3O4/Kaolin was employed to remove Hg2+ and the results were characterized by various methods. Relevant factors, including solution pH, dosage of adsorbent, concentration (C0), and temperature (T), were optimized by Response Surface Methodology (RSM) and Central Composite Designs (CCD). The optimal results show that the importance for adsorption factors is pH > T > C0 > dosage, and the optimal adsorption conditions of PPy-Fe3O4/Kaolin are pH = 7.2, T = 315 K, C0 = 50 mg/L, dosage of 0.05 g/L, and the capacity is 317.1 mg/g. The adsorption process conforms to the pseudo-second-order and Langmuir models. Dubinin–Radushkevich model shows that adsorption process is spontaneous and endothermic. Moreover, the adsorption of mercury by PPy-Fe3O4/Kaolin was achieved mainly through electrostatic attraction, pore diffusion, and chelation between amino functional groups and Hg2+. PPy-Fe3O4/Kaolin has excellent reproducibility, dispersity, and chemical stability, and it is easy to be separated from solution through an external magnetic field. The experiments show that PPy-Fe3O4/Kaolin is an efficient and economical adsorbent towards mercury.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of Hg2+ with Polypyrrole-Functionalized Fe3O4/Kaolin: Synthesis, Performance and Optimization with Response Surface Methodology

et al. 2020

View full text Add to dashboard Cite

show abstract

“…3d. The maximum absorption is estimated to be 40.5 mg g -1 , higher than that of some absorbents reported in recent years (Mora Alvarez et al 2018, Saleh 2015, Solisio et al 2019, Tan et al 2016).…”

Section: Absorbing Performancementioning

confidence: 54%

Function Led Design of Aerogels: One-pot Self-assembly of 3D Macroscope Poly(vinyl alcohol) Aerogel for Mercury Species Removal in Aqueous Solution with Super-Fast Regeneration

Liu¹,

Bai²,

Hei³

et al. 2021

Preprint

View full text Add to dashboard Cite

Mercury pollutant, especially ionic mercury (Hg2+), has been ranked by the World Health Organization as one of the top ten chemicals that threatens the major public health. Absorption of Hg2+ on the solid phase is one of the effective ways for water remediation. In view of the disadvantages of most existing absorbents such as laborious preparation, secondary pollution, or time-consuming regeneration process, herein, we developed an aerogel absorbent based on poly(vinyl alcohol) and the auxiliary crosslinker of phytic acid, both of which can readily react through a self-assembly process in the hydrothermal condition. With good mechanical strength, tunable pore size and surface area, the aerogel is adequate in absorbing Hg2+ and organic mercury compound (MeHg+), and can be renewed in a super-fast process (~ 40 s). High removal rate of Hg2+ can be maintained even in presence of the competing ions (Mn2+, Cd2+, Cr2+, Cu2+ and Pb2+). The features of low-cost raw materials, straightforward synthesis, and the easy manipulation in remediation/regeneration process create a promising absorbent material to be used in the real scene.

show abstract

“…Porosimetric analysis of parent and produced materials Table 4. Size distribution results of materials CFA derived Ag NPs doped nanocomposite 6.0 105.0 [31] Exhausted coffee waste 31.7 11.5 [42] Modified palm oil fuel ash 1.2 28.5 [43] Mercapto-modified bentonite 19.3 92.0 [44] Ag-X CFA derived zeolite 5.0 203 [1] Linde Type A CFA derived zeolite 0.31 - [29] Table 3.…”

Section: Discussionmentioning

confidence: 99%

Synthetic sodalite doped with silver nanoparticles: Characterization and mercury (II) removal from aqueous solutions

Tauanov

Tsakiridis

Shah

et al. 2019

Journal of Environmental Science and Health, Part A

View full text Add to dashboard Cite

In this work, a novel silver-doped synthetic sodalitic composite was synthesized and characterized using advanced characterization methods, namely TEM-EDS, XRD, SEM, XRF, BET, zeta potential and particle size analysis. The synthesized nanocomposite was used for the removal of Hg 2+ from 10 ppm aqueous solutions of initial pH equal to 2. The results showed that the sodalitic nanocomposites removed up to 98.65% of Hg 2+ , which is approximately 16% and 70% higher than the removal achieved by sodalite and parent coal fly ash, respectively. The findings revealed that the Hg 2+ retention in nanocomposite microstructure is a multifaceted mechanism that predominantly involves adsorption, precipitation and Hg-Ag amalgamation. The study of the anions effect (Cl-, NO3-, C2H3O2and SO4 2-) indicated that the Hg 2+ uptake is comparatively higher when Clanions co-exist with Hg 2+ in the solution.

show abstract

Evaluation of mercury (Hg2+) adsorption capacity using exhausted coffee waste

Cited by 51 publications

References 45 publications

Removal of Hg2+ with Polypyrrole-Functionalized Fe3O4/Kaolin: Synthesis, Performance and Optimization with Response Surface Methodology

Removal of Hg2+ with Polypyrrole-Functionalized Fe3O4/Kaolin: Synthesis, Performance and Optimization with Response Surface Methodology

Function Led Design of Aerogels: One-pot Self-assembly of 3D Macroscope Poly(vinyl alcohol) Aerogel for Mercury Species Removal in Aqueous Solution with Super-Fast Regeneration

Synthetic sodalite doped with silver nanoparticles: Characterization and mercury (II) removal from aqueous solutions

Contact Info

Product

Resources

About