Selective Recovery of Ag(I) Using a Cellulose-Based Adsorbent in High Saline Solution

Yang, Xiaojuan; Dong, Zhen; Zhang, Manman; Du, Juan; Zhao, L.

doi:10.1021/acs.jced.9b01107

Cited by 12 publications

(8 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Δ G is positive at 293–308 K, and the value becomes smaller with increasing temperature, which may be due to the lower temperature made the adsorption rate smaller in the adsorption process. Δ G becomes negative at 313 to 323 K, indicating that the adsorption process is spontaneous at higher temperature . Moreover, the adsorption of RhB by XGH is an endothermic reaction, and low temperature is not conducive to the reaction.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Ultrahigh Adsorption Capacity of Acrylic Acid-Grafted Xanthan Gum Hydrogels for Rhodamine B from Aqueous Solution

Yang

Xiong

et al. 2021

J. Chem. Eng. Data

Self Cite

View full text Add to dashboard Cite

Rhodamine B (RhB) is considered as a potential source of water pollution because it is harmful to the environment and humans, and thus, it should be removed from the water system. Hydrogels derived from polysaccharides have been received much attention for dye adsorption. In this study, acrylic acid (AAc)-grafted xanthan gum hydrogel (XGH) was synthesized by electron beam irradiation. The effects of AAc concentration and the adsorbed dose on the gel fraction and swelling ratio were studied. The XGH hydrogel structure was characterized by FTIR and SEM analyses. As a result, the sample with 75% gel fraction was selected to investigate the adsorption behaviors toward RhB. The adsorption kinetic data were in good agreement with pseudo-secondorder mode. The adsorption isotherms fitted well with the Langmuir equation with an ultrahigh maximum adsorption capacity of 2612.12 to 2777.77 mg/g at 293 to 323 K, which is a significant breakthrough in RhB uptake. Na 2 CO 3 and HCl were used to regenerate the RhB-loaded XGH. The removal efficiency was found to be nearly unchanged after five adsorption−desorption cycles. Finally, the selectivity of XGH toward cationic/anionic mixing dyes was investigated.

show abstract

Section: Resultsmentioning

confidence: 99%

“…ΔG becomes negative at 313 to 323 K, indicating that the adsorption process is spontaneous at higher temperature. 40 Moreover, the adsorption of RhB by XGH is an endothermic reaction, and low temperature is not conducive to the reaction. 3.3.6.…”

Section: Table 2 Parameters and Correlation Coefficients Of Langmuir ...mentioning

confidence: 99%

Ultrahigh Adsorption Capacity of Acrylic Acid-Grafted Xanthan Gum Hydrogels for Rhodamine B from Aqueous Solution

Yang

Xiong

et al. 2021

J. Chem. Eng. Data

Self Cite

View full text Add to dashboard Cite

show abstract

“… 22 − 24 Various chemically functionalized celluloses have been designed for the efficient recovery of heavy metals 25 , 26 and precious metals. 19 , 22 , 27 , 28 Incorporating sulfur functional groups on polymers is a promising approach for the design of adsorbents for soft metals. Adsorption characters of adsorbents, such as selectivity and adsorption capacity, depend on the structures of the sulfur functional groups bound to the adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Highly Selective Scavenger of Precious Metals from a Printed Circuit Board Based on Cellulose Filter Paper Functionalized with a Grafted Polymer Chain Bearing N-Methyl-2-hydroxyethylcarbamothioate Moieties

Hyder

Ochiai

2022

ACS Omega

View full text Add to dashboard Cite

We report the synthesis and practical application of a novel scavenger for precious metals. The scavenger was prepared from cellulose filter paper with grafted chains of poly(glycidyl methacrylate) modified with a novel ligand group of N -methyl-2-hydroxyethylcarbamothioate moieties, introduced by the reaction with O -1-mercapto-3-phenoxypropan-2-yl N -methyl-2-hydroxyethylcarbamothioate. Batch experiments were performed to evaluate the capability of the scavenger in ranges of pH and acid concentration as well as to determine the kinetics and isotherm models. The scavenger was found to adsorb only Ag(I), Pd(II), and Au(III) from an aqueous media in the presence of coexisting ions of different bases and precious metals at wide ranges of pH and acid concentration. The adsorption rates fit a pseudo-second-order kinetic equation, and the adsorption reached equilibrium within 60 min. The isotherm studies indicated that the obtained data were a good fit with the Langmuir model. The maximum adsorption capacities of Ag(I), Pd(II), and Au(III) were 126.95, 124.67, and 230.67 mg g –1 , respectively. Regeneration experiments indicated that the adsorbent maintained 97% of its initial efficiency even after five adsorption/desorption cycles. The scavenger was effectively utilized to recover Ag(I), Pd(II), and Au(III) from an aqua regia solution of waste printed circuit boards.

show abstract

“…The CE with a number of surface hydroxyl groups (−OH) on the backbone provides opportunities for further functionalization to enhance interactions with polar adsorbates and creates a hydrophilic environment for water retention, as compared to synthetic polymers . The CE-based adsorbents showed good mechanical strength and excellent adsorption capacities similar to those of ion exchange resins or commercially available activated carbon . The CE-based adsorbents are particularly effective for the extraction of pollutants present in contaminated ground water in rural areas .…”

Section: Introductionmentioning

confidence: 99%

“…25 The CE-based adsorbents showed good mechanical strength and excellent adsorption capacities similar to those of ion exchange resins or commercially available activated carbon. 44 The CE-based adsorbents are particularly effective for the extraction of pollutants present in contaminated ground water in rural areas. 45 So far, the majority of studies focused on using one adsorbent for the removal of a single pollutant from water.…”

Section: Introductionmentioning

confidence: 99%

Sequential Removal of Oppositely Charged Multiple Compounds from Water Using Surface-Modified Cellulose

Batool

Valiyaveettil

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Efficient removal of organic and inorganic pollutants is a challenge owing to the involvement of different physicochemical properties. Herein, we discuss a novel approach for successive adsorption of oppositely charged multiple compounds [acid fuchsin (AF), Cu(II), perylene tetracarboxylate (PTC) anions, and Zn(II) ions] from water using chemically modified cellulose fibers (PEI/CE). The changes in net surface charges of the adsorbent accompanied by the successive adsorption of oppositely charged compounds from water are utilized as a concept for adsorption of multiple pollutants on the same adsorbent. The PEI/CE adsorbent was separated via simple filtration after each adsorption experiment and used directly for further successive adsorption without any drying or surface treatments. Compared to most of the reported adsorbents, PEI/CE fibers showed excellent adsorption capacities of 562, 552, 216, and 157 mg/g for AF, Cu(II) ions, PTC dye, and Zn(II) ions, respectively. Analysis of the data from kinetic and isotherm studies revealed the best fit to the pseudo-second-order and Langmuir isotherm model for all adsorbates. Furthermore, data from the zeta potential measurements and elemental analysis helped to establish the mechanism of the adsorption process. Such concepts are viable for the removal of known pollutants from multiple industrial effluents. A series of such simple, renewable adsorbents and successive adsorption processes could be developed as a new platform for effective removal of several pollutants from wastewater effluents.

show abstract

Selective Recovery of Ag(I) Using a Cellulose-Based Adsorbent in High Saline Solution

Cited by 12 publications

References 41 publications

Ultrahigh Adsorption Capacity of Acrylic Acid-Grafted Xanthan Gum Hydrogels for Rhodamine B from Aqueous Solution

Ultrahigh Adsorption Capacity of Acrylic Acid-Grafted Xanthan Gum Hydrogels for Rhodamine B from Aqueous Solution

Synthesis of a Highly Selective Scavenger of Precious Metals from a Printed Circuit Board Based on Cellulose Filter Paper Functionalized with a Grafted Polymer Chain Bearing N-Methyl-2-hydroxyethylcarbamothioate Moieties

Sequential Removal of Oppositely Charged Multiple Compounds from Water Using Surface-Modified Cellulose

Contact Info

Product

Resources

About