Ion‐exchange adsorption of calcium ions from water and geothermal water with modified zeolite A

Song, Junchao; Liu, Mingyan; Zhang, Yang

doi:10.1002/aic.14671

Cited by 26 publications

(5 citation statements)

References 62 publications

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“…The pHpzc values were 8.2, 7.9, 8.9, 8.0, 8.3 and 8.0 for zeolite samples from 101Z to 106Z, respectively. At pH values below the pHpzc, the surface of the zeolite will have a positive charge, while at a pH value higher than the pHpzc, the exterior surface is dominated by negative charges [13,59]. The zeolite surface charges, caused by ionization of external hydroxyl groups (Si-OH and Al-OH), is strongly dependant on acid/base reduction when the zeolite is exposed to water solution [14].…”

Section: Effect Of Phmentioning

confidence: 99%

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

El-Nahas

Osman

Arafat³

et al. 2020

Journal of Water Process Engineering

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Herein, we proposed an affordable and facile way of treating the hardening of water from local groundwater and seawater sources. This was facilitated by synthesizing zeolitic materials via an effortless and affordable method from readily available disposed of waste materials. Firstly, by converting waste aluminium (scrap wire cables, takeaway foil, cans, and spray aerosol bottles) along with disposed of silica gel into active zeolitic materials with the aid of a conventional domestic microwave. Small amounts of the produced zeolites (NaX and NaA) were utilized in the removal of the hardness of water (10 g.L-1), showing elimination of Ca 2+ and Mg 2+ ions within 30 minutes, removing 90% of the total hardness (> 1000 ppm). The spent zeolite samples can be further used for more than two consequent cycles, then the regeneration can be promoted by using NaCl solution at ambient conditions. The total price for the synthesis of 1 kg of the zeolite produced herein is 14 $/kg. This is 70% lower than the price of commercial zeolites available in the market. Our proposed facile route in zeolite preparation could potentially change the traditional costly softening treatment techniques. It also minimizes the use of extra chemical materials, templates and multistep procedures. The excellent hardness removal capacity in groundwater and seawater using synthesized zeolite samples could open doors for various applications.

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Section: Effect Of Phmentioning

confidence: 99%

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

El-Nahas

Osman

Arafat³

et al. 2020

Journal of Water Process Engineering

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“…In consideration of the fluidity of cations in NaX zeolite, a series of ionexchanged NaX zeolites were considered to study the influences of different cations in X zeolites on the ultradeep dewatering performance. 46 Structural Characterizations of Ion-Exchanged X Zeolites. As shown in Table 2, the ion exchange degrees of alkali cations nearly accomplished 90%, except Cs + .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Therefore, we paid more attention to the NaX zeolite herein. In consideration of the fluidity of cations in NaX zeolite, a series of ion-exchanged NaX zeolites were considered to study the influences of different cations in X zeolites on the ultradeep dewatering performance …”

Section: Resultsmentioning

confidence: 99%

Ultradeep Removal of Moisture in Gases to Parts-per-Billion Levels: The Exploration of Adsorbents

Zhang

Kang

et al. 2018

J. Phys. Chem. C

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Owing to the rigid standards of manufacturing semiconductor components, decrease of the moisture to parts-per-billion (ppb), at a global level, is always vital but extremely nerve-racking in the production of high-purity gases. Herein, typical adsorbents including oxides (SiO2 and γ-Al2O3), zeolites (4A and NaX), and metal–organic frameworks (MOFs; HKUST-1, UiO-66, and ZIF-8) are investigated with respect to the abilities of ultradeep dewatering from N2. Compared with other adsorbents, NaX performs much better on both dewatering efficiency (DE, from 2750 to 66 ppb) and the adsorption capacity (AC, 1.55 × 104 L N2·g–1). Moreover, it is for the first time experimentally and theoretically proved that the dewatering ability of X zeolite mainly depends on its cation species (Na+, Li+, K+, Cs+, Mg2+, Ca2+, Sr2+, or Ba2+), the forces between the zeolite and H2O, and the number of H2O molecules per cell of the zeolite. CaX thus shows a fascinating DE from 2750 to 33 ppb, a huge AC of 9.08 × 104 L N2·g–1, and an ideal reusability, compared with results of the scarce contributions reported to date.

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“…The adsorption of calcium by Na-A zeolite is very fast. It often reaches more than 75% after less than 10 min for the Ca/zeolite ratio that was used (Song et al 2015). The P2 condition will determine if FLP-Na can desorb calcium already bound to zeolite.…”

Section: Relative Affinity Of Zeolite and Flp-na For Calcium Ionsmentioning

confidence: 99%

Evaluation of a combination of phosphorylated fibers and zeolite as a potential substitute to synthetic wetting agents in peat moss products

Mouandhoime

Brouillette

2021

Can. J. Soil. Sci.

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Water availability and pH are important factors to consider to determine the suitability of a material for use as a growing medium. Unfortunately, most horticultural substrates are characterized by their water repellency. This is the case with peat moss which is hydrophobic and acidic. Synthetic surfactants are required to improve its wettability. In this study, a combination of phosphorylated wood pulp fibers (FLP) and zeolite is proposed as a substitute to surfactants to increase the wettability of peat moss in the presence of lime, an additive generally used as fertilizer or pH regulator. Results show that lime reduces the water retention capacity of FLP. However, the addition of 15% zeolite to the peat moss/FLP system increases the pH and water retention of the substrate. The negative effect of the presence of 1 wt. % lime on the water retention of the peat moss/FLP mixture was corrected by zeolite addition. Optimal conditions were obtained at 10% zeolite for the two types of lime tested with favorable pH and water retention capacity values. Zeolite was shown to have a higher affinity than FLP for calcium ions preventing the detrimental interaction between FLP and calcium ions.

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Ion‐exchange adsorption of calcium ions from water and geothermal water with modified zeolite A

Cited by 26 publications

References 62 publications

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

Ultradeep Removal of Moisture in Gases to Parts-per-Billion Levels: The Exploration of Adsorbents

Evaluation of a combination of phosphorylated fibers and zeolite as a potential substitute to synthetic wetting agents in peat moss products

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