Spontaneous imbibition experiments showed that a 0.1 % solution of OPHS surfactant was able to increase the recovery rate by more than four times compared to the imbibition solution without added surfactant; In high-pressure gas adsorption/desorption experiments, the OPHS surfactant solution demonstrated a higher affinity for adsorption …

Hydrogen recovery of 98.7% and purity of 97.5% were obtained at 3 min of adsorption whereas, hydrogen recovery of 99.3% and purity of 92.5% were obtained at longer adsorption of 5 min. Although desorption during blowdown did not affect the purity and recovery of hydrogen significantly, it revealed a noticeable trade-off between carbon …

In this study, Pb (II) removal from wastewater was investigated using a modified vitric crystal tuffite with a BET surface area of 11.7 m2/g. For this purpose, tuffite was used in its natural …

Surfactant loss due to adsorption on the porous medium of an oil reservoir is a major concern in enhanced oil recovery. Surfactant loss due to adsorption on the reservoir rock weakens the effectiveness of the injected surfactant in reducing oil–water interfacial tension (IFT) and making the process uneconomical. In this study, surfactant …

The desorption tests on magnetite used for treating real industrial wastewater indicated effective desorption of Tl from this sample as well (Table S9). These findings indicate the great potential of this magnetite-based reversible adsorption/desorption technique for the removal and recovery of Tl(I) from wastewater.

Adsorption–desorption is an efficient tool for the separation and concentration of plant phenolics from extracts or from wastewaters generated in agricultural activities and food industries. The recovery of compounds from waste fractions offers advantages derived from the integral utilization of raw materials to achieve sustainability …

Near-infrared light induced adsorption–desorption cycle for VOC recovery by integration of metal–organic frameworks with graphene oxide nanosheets †. Hongli Liu,ab Ningyun …

This work showed the importance of conducting a complete and integrated study of an adsorption process including both adsorption and desorption steps. The use of resin with n-propanol as eluent achieved the best recovery in the simulated purification of propionic acid. Read this article. To access this article, please review the available ...

The adsorption and desorption rates were expressed by the formulae (Liu et al., 2020a): (4) η a = (A 0 − A e) A 0 × 100 % (5) η d = (A t − A e) A 0 − A e × 100 % where η a or η d is the adsorption or desorption rate, A 0 is the absorbance of the original MB solution, A t is the absorbance at time t under light irradiation, and A e ...

Adsorption, as a green and efficient technique, shows great potential for Re recovery from low or ultra-low concentration solutions. In recent years, numerous adsorption schemes have been developed to separate and enrich Re from liquid phase.

Herein, a near-infrared light induced desorption of VOCs from a photodynamic GO@MIL-101 nanocomposite adsorbent was attempted by the integration of MIL-101 with GO nanosheets. MIL-101 uniformly and closely grown on GO nanosheets not only rendered inherent excellent VOC adsorption capability, but also enabled it to manifest strong light ...

The Little Bald Mountain plant is typical of small ADR plants (Adsorption-Desorption-Recovery Plants) built by KCA. All operations needed for recovery of gold and silver from solution onto activated carbon, desorption, and electrowinning of metal bullion, are included in a 40-ft (12 meter) trailer or shipping container.

The desorption test was performed by adding biochar extracted from the adsorption test into the forest runoff water with low TN concentration (0.2 or 0.35 mg L−1). The desorption results showed that desorption was negligibly small, and it was dependent on the TN concentration for birch biochar.

However, not all surfactant adsorption isotherms follow a specific model. Fig 1 shows a typical four-region (S-type) adsorption isotherm in an extensive range of surfactant concentrations going beyond the critical micelle concentration (CMC) [101, 102].Adsorption in various regions was explained by taking considerations of …

Activated carbon and a weak base resin were used as adsorbents for organic acids of relevance in green chemistry. Equilibrium adsorption studies in single and binary systems of acetic, propionic and butyric acids were carried out using various solvents (water, ethanol, and n-propanol) and equilibrium isotherm models were tested. The resin had a …

Desorption efficiency of Cr(VI) by 0.1 M NaOH was increased from 51.16 to 59.41% by sonication bath as compared to roller shaker. More than 97% of desorbed Cr(VI) was recovered in less than 10 min by BaCl 2. This study shows that non-living microalga materials are more effective than living cells in the removal and recovery of Cr(VI) from …

For instance, Cipolla et al. studied the adsorption contribution in Marcellus and Barnett shale gas recovery for 30 years and concluded an increase of 5–15% of recovery due to adsorption. In addition, they also concluded that the desorption contributes at later periods of production depending on fracture spacing, reservoir …

@article{Liu2022NearinfraredLI, title={Near-infrared light induced adsorption-desorption cycle for VOCs recovery by integration of metal-organic frameworks with graphene oxide nanosheets}, author={Hongli Liu and Ningyun Li and Mengying Feng and Guiying Li and Weiping Zhang and Taicheng An}, journal={Environmental Science: Nano}, year={2022 ...

The purification and concentration of volatile fatty acids (VFAs) after acidogenic fermentation represent the key steps for their industrial use. In this study, different batch adsorption tests were performed on single VFAs using powdered activated carbon (PAC), Lewatit VP OC 1065, Amberlyst A21, and VFA mixtures using Lewatit and Amberlyst. …

Hence, a new downstream technique for biosurfactant recovery from fermented DW comprised of adsorption-desorption processes using wood-based activated carbon (WAC) was developed. This study …

ABSTRACT. In this study, the suitability of zeolite as a possible medium for ammonium adsorption, desorption and recovery from wastewater was investigated. Specifically, …

Abstract. Adsorption–desorption process has been considered as a promising way for both the removal and recovery of volatile organic compounds (VOCs) from waste gases. …

Adsorption plays an important role in removing cadmium (Cd 2+) from water, and magnetic adsorbents are increasingly being used due to their ease of separation and recovery.Magnetic Fe 3 O 4 –coated hydroxyapatite (HAP) nanoparticles (nHAP-Fe 3 O 4) were developed by co-precipitation and then used for the removal of Cd 2+ from …

The results for 1.5 wt% feed butanol–water binary solutions showed that the butanol adsorption capacity and the recovery of butanol were fairly constant (around 302 mg/g and 84 %, respectively) in subsequent adsorption–desorption cycles confirming that all the amount of adsorbed butanol is desorbed and the adsorption column could …

Adsorption and desorption mechanism of aromatic VOCs onto porous carbon adsorbents for emission control and resource recovery: recent progress and …

Aug 24 2014. Sorption describes the actions of absorption and adsorption - desorption is the opposite of sorption. Adsorption and absorption are important processes that occur in chemistry and biology. It is important to have an understanding of both processes and the differences between them when considering separation protocols, particularly ...

Desorption experiments were conducted at different pH levels, revealing that Cu had lower desorption efficiency than Cd in a Ca(NO 3) 2 extraction solvent [26]. S. Lukman and his research team studied the adsorption and desorption of five heavy metals: Cu, Pb, Zn, Cd, and Cr under the influence of initial pH in both single and multi …

One of the latest studies on the valorisation of phenolic compounds from solid oil mill residues by means of adsorption/desorption [61] showed recovery percentages of total phenols between 74.6% − 70.31%, using contents of resin of 100 and 50 g·L-1, respectively. In addition, these authors worked under acid conditions.

After three adsorption–desorption cycles, the regeneration rate was 48.70% for ZBC and 61.72% for ZBC a. After three cycles, ... The good adsorption and recovery properties of the blocky zeolite-biochar composites indicate that it is feasible to achieve adsorbent separation from soil by the composite of minerals and biochar. In future ...