Enhanced removal of U(VI) from aqueous solution by chitosan-modified zeolite

Yang, Tao; Zhang, Weimin; Liu, Haiyan; Guo, Yihang

doi:10.1007/s10967-019-06993-w

Cited by 21 publications

(6 citation statements)

References 47 publications

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“…Effect of pH on adsorption was studied by adjusting the pH of the solution using 0.1 M HNO 3 or 0.1 M NaOH. The mixture was equilibrated for 3 h. The concentration of uranium in the supernatant was estimated by spectrophotometer at 650 nm using Arsenazo III complexing agent (Yang et al , 2020). For adsorption kinetics study, U(VI) solution was added to the conical flask and equilibrated.…”

Section: Methodsmentioning

confidence: 99%

Effective adsorption of U(VI) from aqueous solution using polystyrene grafted with zeolite

Elhefnawy

Elabd

2022

PRT

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Purpose The purpose of this study is to prepare Polystyrene grafted with Zeolite Y (Zeosty) for Uranyl ion [U(VI)] adsorption from aqueous solution. The adsorption mechanism has been explained by studying kinetic, isothermal and thermodynamic models. Design/methodology/approach Polystyrene was grafted with Zeosty by a simple hydrothermal technique. Zeosty was characterized by different techniques such as X-ray diffraction, scanning electron microscope, energy dispersive X-ray and Infrared spectroscopy to confirm its structure and its molecular composition. Zeosty was used for U(VI) adsorption from an aqueous solution in a series of batch experiments. The effects of pH, contact time, initial U(VI) concentration and temperature on the adsorption process were investigated. Findings The results showed that the adsorption of U(VI) on the prepared reached equilibrium at pH 6 with a removal efficiency of 98.9%. Adsorption kinetics and isotherms models are studied on the experimental data to estimate the mechanism of the adsorption reaction was chemisorption and homogenous reaction. The activity of Zeosty increased at high temperatures, resulting in the adsorption capacity increase. Thermodynamic parameters ΔGo, ΔHo and ΔSo indicate that the adsorption processes are spontaneous and endothermic. Zeosty has an effective surface and could be considered a valuable adsorbent for U(VI) removal from aqueous waste. A comparison study proves that the new adsorbent has high effective behavior in the adsorption process, and it is considered a new reliable adsorbent for U(VI) removal from wastewater. Originality/value This study is complementary to the previous study using the same technique to prove that the effective fine particle adsorbents need solid support to enhance their absorption capacities.

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Section: Methodsmentioning

confidence: 99%

Effective adsorption of U(VI) from aqueous solution using polystyrene grafted with zeolite

Elhefnawy

Elabd

2022

PRT

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“…The weight percentages of Zr and Fe were the highest at 50.68 and 38.92%, respectively. The N value was derived from the chitosan materials [45][46][47]. Al, Si, and Fe were derived from zeolite and magnetite, respectively.…”

Section: Characterization Of Cs-zl/zro/fe 3 Omentioning

confidence: 99%

Application of Box–Behnken Design to Optimize Phosphate Adsorption Conditions from Water onto Novel Adsorbent CS-ZL/ZrO/Fe3O4: Characterization, Equilibrium, Isotherm, Kinetic, and Desorption Studies

Hidayat,

Mohamad Sarbani,

Yonemura

et al. 2023

IJMS

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Phosphate (PO43−) is an essential nutrient in agriculture; however, it is hazardous to the environment if discharged in excess as in wastewater discharge and runoff from agriculture. Moreover, the stability of chitosan under acidic conditions remains a concern. To address these problems, CS-ZL/ZrO/Fe3O4 was synthesized using a crosslinking method as a novel adsorbent for the removal of phosphate (PO43−) from water and to increase the stability of chitosan. The response surface methodology (RSM) with a Box–Behnken design (BBD)-based analysis of variance (ANOVA) was implemented. The ANOVA results clearly showed that the adsorption of PO43− onto CS-ZL/ZrO/Fe3O4 was significant (p ≤ 0.05), with good mechanical stability. pH, dosage, and time were the three most important factors for the removal of PO43−. Freundlich isotherm and pseudo-second-order kinetic models generated the best equivalents for PO43− adsorption. The presence of coexisting ions for PO43− removal was also studied. The results indicated no significant effect on PO43− removal (p ≤ 0.05). After adsorption, PO43− was easily released by 1 M NaOH, reaching 95.77% and exhibiting a good capability over three cycles. Thus, this concept is effective for increasing the stability of chitosan and is an alternative adsorbent for the removal of PO43− from water.

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“…Waktu kontak memegang peran penting dalam proses adsorpsi, terutama dari segi efisiensi ekonomi [40]. Adsorpsi uranium dilakukan dengan proses batch dengan mengontakkan 0, 25…”

Section: Hasil Dan Pembahasanunclassified

“…dengan qe (mg/g) adalah kapasitas adsorpsi uranium, qt (mg/g) adalah jumlah uranium yang terserap pada t, t (menit) adalah waktu kontak, k1 (1/menit) adalah konstanta laju adsorpsi pseudo orde pertama, K2 (g/mg min) adalah konstanta laju adsorpsi pseudo orde kedua. Nilai k1 diperoleh dari plot log (qe -qt) dengan t, sedangkan nilai k2 diperoleh dari plot t/qt terhadap t. m (g) adalah massa adsorben, dan v (mL) adalah volume larutan [4], [35], [40]- [43].…”

Section: Log(𝑞 𝑒 − 𝑞unclassified

Adsorpsi Uranium Terlarut Oleh Komposit Ammonium Dihydrogen Phosphate/Zeolit

Purwanto,

Ibnu Saputra,

Mirawaty

et al. 2023

urania

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Zeolit merupakan salah satu mineral aluminosilikat yang banyak dipelajari sebagai material penjerap untuk pengelolaan limbah cair. Mineral ini juga banyak dipelajari untuk pengelolaan limbah cair dari industri nuklir, termasuk di antaranya sebagai penjerap uranium dari limbah cair. Pengelolaan limbah cair yang mengandung uranium ini diperlukan pada setiap tahapan daur bahan bakar nuklir. Modifikasi zeolit, yang dapat dilakukan secara fisika atau kimia, telah dilaporkan dapat meningkatkan kemampuan adsorpsinya. Dalam penelitian ini dilakukan peningkatan kemampuan zeolit dengan menambahkan ammonium dihydrogen phosphate (ADP) sehingga terbentuk komposit ADP/zeolit untuk adsorpsi uranium. Tujuan penelitian ini adalah untuk mempelajari kemampuan komposit ADP/zeolit sebagai penjerap uranium dari limbah cair. Zeolit alam dari Lampung digunakan sebagai material awal. Material komposit dipreparasi dengan mencampurkan ADP dan zeolit dalam labu didih. Komposit ADP/zeolit yang diperoleh dikarakterisasi dengan XRD dan selanjutnya digunakan untuk percobaan adsorpsi uranium yang dilakukan dengan metode batch. Hasil penelitian menunjukkan mineral utama pada zeolit yang digunakan adalah klinoptilolit. Keberhasilan preparasi komposit ADP/zeolit dibuktikan melalui pola difraksi XRD. Hasil eksperimen ditunjukkan dengan kinetika adsorpsi uranium oleh komposit ADP/zeolit yang berlangsung cepat dan mencapai kesetimbangan kurang dari 16 menit. Model kinetika adsorpsi uranium oleh komposit ADP/zeolit model pseudo-orde kedua. Variabel pH menunjukkan adsorpsi uranium nitrat oleh komposit ADP/zeolit optimum pada pH 7. Komposit ADP/zeolit menunjukkan peningkatan kemampuan adsorpsi terhadap uranium dibandingkan dengan zeolit alam. Komposisi penyusun komposit ADP/zeolit didapatkan pada perbandingan ADP : zeolit masing-masing adalah 1:1.Kata kunci: Komposit, zeolit, ammonium dihydrogen phosphate, uranium terlarut, adsorpsi.

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Enhanced removal of U(VI) from aqueous solution by chitosan-modified zeolite

Cited by 21 publications

References 47 publications

Effective adsorption of U(VI) from aqueous solution using polystyrene grafted with zeolite

Effective adsorption of U(VI) from aqueous solution using polystyrene grafted with zeolite

Application of Box–Behnken Design to Optimize Phosphate Adsorption Conditions from Water onto Novel Adsorbent CS-ZL/ZrO/Fe3O4: Characterization, Equilibrium, Isotherm, Kinetic, and Desorption Studies

Adsorpsi Uranium Terlarut Oleh Komposit Ammonium Dihydrogen Phosphate/Zeolit

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