Synthesis of zeolite P1 from fly ash under solvent-free conditions for ammonium removal from water

Liu, Yi; Yan, Chunjie; Zhao, Junjie; Zhang, Zuhua; Wang, Hongquan; Zhou, Sen; Wu, Liqun

doi:10.1016/j.jclepro.2018.08.128

Cited by 139 publications

(79 citation statements)

References 63 publications

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“…Figure 5a,b shows the TG and DSC curves for NaP zeolite with different SiO 2 /Al 2 O 3 molar ratio. From the TG curve, the total weight loss was 13.20% and 15.44%, respectively, which is basically consistent with the shape and mass loss of the TG curve of the NaP zeolite reported in the literature [35]. In the temperature range of 20-200 • C, the removal of adsorbed water is the cause of mass loss.…”

Section: Sem Results Analysissupporting

confidence: 89%

“…Two thermal effects can be clearly seen from the DSC curve of the sample, and the endothermic peaks present at around 89 • C and 152 • C are related to the release of water molecules in the NaP zeolite. The exothermic effects at 386 • C and 364 • C are independent of weight loss and are due to the conversion and decomposition of the NaP zeolite structure [21,34,35]. Therefore, the heat resistant temperatures of our synthesized NaP zeolites were 386 • C and 364 • C. Table 2 shows the results of specific surface area, external surface area, total pore volume and average pore diameter of CGCS and different NaP zeolites after pretreatment at 200 • C. The specific surface areas of the SiO 2 /Al 2 O 3 = 5.20 and 3.40 samples were 161.06 m 2 /g and 98.24 m 2 /g, respectively, and the pore volumes were 0.0021 cm 3 /g and 0.0036 cm 3 /g, respectively.…”

Section: Sem Results Analysismentioning

confidence: 99%

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Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Zhang

Zhao

et al. 2020

Applied Sciences

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In view of the current and urgent environmental protection needs, the use of industrial solid waste in China’s Ningdong is becoming more and more important. In this paper, NaP zeolite with good physical properties is synthesized by using coal gasification coarse slag (CGCS) as the raw material, without the addition of a silicon and aluminum source, without the addition of a template agent, and without high-temperature calcination. Add a small amount of NaOH and deionized water to the CGCS to adjust the molar ratio to SiO2:Al2O3:Na2O:H2O = 5.2:1.0:5.0:100. The effects of aging time, crystallization temperature, and crystallization time parameters on synthetic zeolite were studied. The raw materials and the obtained zeolite were tested by XRF, XRD, SEM, FT-IR, TG-DSC, BET, and other technologies. The results show that the specific surface area of the synthesized NaP zeolite can reach 161.06 m2/g, which has the characteristics of large specific surface area, regular morphology, and high crystallinity. We obtained NaP zeolite through a simple and low-cost synthesis method. The synthesized NaP zeolite was used to simulate the removal of ammonia nitrogen in wastewater, and the optimal removal rate was 92.67%. Among them, Na+ plays an important role in the synthesis of NaP zeolite and ion exchange with NH4+. Our research provides new ideas for solving the large-scale accumulation of CGCS and treating ammonia nitrogen in industrial wastewater. Thus, it is a promising green environmental protection and “treating waste by waste” route.

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Section: Sem Results Analysissupporting

confidence: 89%

Section: Sem Results Analysismentioning

confidence: 99%

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Zhang

Zhao

et al. 2020

Applied Sciences

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“…The pseudo-second-order model indicates that a monolayer adsorption system and the chemical adsorption play the main roles in the process [35]. Other ZFAs produced similar results for ammonia nitrogen adsorption [36,37]. In different initial NH ZFA proceeded fast, probably because of vacant adsorptive sites on the adsorbents [34].…”

Section: Kinetic Analysismentioning

confidence: 82%

Removal of Ammonium from Swine Wastewater Using Synthesized Zeolite from Fly Ash

Tang

Wang

et al. 2020

Sustainability

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Synthetic zeolites with pretreated fly ash as a raw material were used to remove ammonium from wastewater using a hydrothermal method in this study. Two pretreatment methods of fly ash were used to compare the ammonium removal of zeolites: water-washing and pickling. In addition, the effects of several factors including the time, temperature, pH, adsorbent dosage, coexisting ions and initial concentration were investigated to gain insight into the adsorption rate, behavior and mechanism of synthetic zeolites for ammonium. N2 adsorption/desorption isotherms showed that the synthetic zeolite was a mesoporous material with a higher specific area (13.05 m2/g) than the values for raw fly ash (0.34 m2/g). The X-ray diffraction result suggested that the synthetic products mainly belonged to zeolite P and Y. The adsorption kinetic data fitted well with a pseudo-second-order model. The maximum ammonium adsorption capacity was 32.16 mg/g. The synthetic zeolites were also applied to adsorb the ammonium from real swine wastewater. The ammonium removal efficiencies in raw swine wastewater and effluent from the biochemical unit were 64.34% and 79.61%, respectively, which indicated that the synthetic zeolites have a good application for real ammonium wastewater.

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“…Hasil penelitian menunjukkan penambahan nano partikel atau katalis mampu memperbaiki karakteristik pembakaran biodiesel [16]. Penggunaan bentonit sebagai katalis dalam produksi biodiesel telah diteliti secara luas [25][26]. Harga bentonit yang murah dan kemampuan aktivasi yang baik karena memiliki sifat porositas yang tinggi mejadikan bentonit sebagai pilihan sebagai katalis [27].…”

Section: Pendahuluanunclassified

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Dwiwijayanto¹,

Hamidi²,

Wijayanti³

2019

Elemen

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Pengunaan biodiesel sangat penting untuk mengurangi konsumsi bahan bakar fosil baik di bidang transportasi maupun industri. Penambahan nanopartikel pada bahan bakar cair untuk peningkatan karakteristik pembakaran telah lama diminati. Tujuan penelitian ini adalah untuk mengetahui pengaruh penambahan nanopartikel bentonit pada karakteristik pembakaran biodiesel kelapa sawit. Partikel nano tersebut ditambahkan dalam berbagai komposisi pada biodiesel yaitu 0% (B0), 10% (B10), 20% (B20) dan 30% (B30). Pena insulin digunakan untuk membuat droplet dengan ukuran diameter 1 mm. Selanjutnya proses pembakaran droplet direkam menggunakan kamera pada kondisi atmosfer. Bahan bakar diteteskan pada thermocouple junction dan dinyalakan menggunakan butan pada cylindrical burner. Properti seperti ignition delay, burning rate dan temperatur nyala droplet diukur setelah pemrosesan gambar yang dihasilkan. Hasil penelitian menunjukkan nilai igniton delay, temperatur nyala api dan burning rate mengalami peningkatan seiring dengan bertambahnya persentase penambahan bentonit dan yang tertinggi terjadi pada B30. Nilai temperatur maksimum nyala api tertinggi sebesar 663,299oC, nilai ignition delay tertinggi sebesar 0,51 detik dan nilai burning rate tertinggi sebesar 2,63 mm2/s.

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Synthesis of zeolite P1 from fly ash under solvent-free conditions for ammonium removal from water

Cited by 139 publications

References 63 publications

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Removal of Ammonium from Swine Wastewater Using Synthesized Zeolite from Fly Ash

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