Two-dimensional lamellar magnesium silicate with large spacing as an excellent adsorbent for uranium immobilization

2018 ◽  
Vol 5 (10) ◽  
pp. 2406-2414 ◽  
Author(s):  
Weixue Wang ◽  
Zhe Chen ◽  
Haijiang Zhou ◽  
Yifei Zhang ◽  
Xiangke Wang
Keyword(s):  
Ion Exchange ◽  
Surface Complexation ◽  
Magnesium Silicate ◽  
Two Dimensional ◽  
High Adsorption ◽  
Adsorption Ability

Two-dimensional lamellar magnesium silicate with a large spacing of 1.27 nm exhibited a high adsorption ability for U(vi) ions through ion-exchange and surface complexation mechanisms.

Improving barium ion adsorption on two-dimensional titanium carbide by surface modification

2018 ◽  
Vol 47 (25) ◽  
pp. 8375-8381 ◽  
Author(s):  
Wanjun Mu ◽  
Shenzhen Du ◽  
Qianhong Yu ◽  
Xingliang Li ◽  
Hongyuan Wei ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Surface Modification ◽  
Titanium Carbide ◽  
Ion Adsorption ◽  
Two Dimensional ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Barium Ion

To capture radioactive barium from wastewater, the Ti3C2Tx material was modified by activation treatment and it exhibited high adsorption ability for removal of Ba2+ from aqueous solution.

Facile and large-scale synthesis of poly(m-phenylenediamine) nanobelts with high surface area and superior dye adsorption ability

RSC Advances ◽  
2014 ◽  
Vol 4 (85) ◽  
pp. 45244-45250 ◽  
Author(s):  
Yun Meng ◽  
Liyuan Zhang ◽  
Liyuan Chai ◽  
Wanting Yu ◽  
Ting Wang ◽  
...  
Keyword(s):  
Surface Area ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Adsorption Performance ◽  
Large Scale Synthesis

PmPD nanobelts with high adsorption performance have been synthesized by using CTAP as oxidants.

Kinetic and Thermodynamic Study Adsorbing Methylene Blue on Nanozirconia

2013 ◽  
Vol 475-476 ◽  
pp. 1311-1319
Author(s):  
Ping Hua Chen ◽  
Xue Zhen Zhou ◽  
Yong Xiu Li ◽  
Dong Ping Li ◽  
Jing Li ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Thermodynamic Properties ◽  
Adsorption Process ◽  
Sorption Process ◽  
Kinetic Properties ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Methylene Blue Adsorption ◽  
Influence Of Temperature ◽  
Kinetic And Thermodynamic Study

In present study, uniformed nanozirconia is obtained via precipitation, ball milling and spray drying. The characteristics of methylene blue adsorption by nanozirconia are studied in details. The morphology of nanozirconia is examined by SEM. The influence of temperature is studied to obtain the optimal adsorption conditions. The equilibrium adsorption isotherms and the kinetic properties of the adsorption process are investigated to study the mechanism. The thermodynamic properties of methylene blue adsorption is investigated, and the thermodynamic parameters of Gθ, Hθ and Sθ are calculated. The results show nanozirconia has high adsorption ability of 43.99 mg/g to methylene blue, and the adsorption reaction is a spontaneous and physic-sorption process.

scholarly journals Sorption and mechanism studies of Cu2+, Sr2+ and Pb2+ ions on mesoporous aluminosilicates/zeolite composite sorbents

2020 ◽  
Vol 82 (5) ◽  
pp. 984-997
Author(s):  
Tatyana Kouznetsova ◽  
Andrei Ivanets ◽  
Vladimir Prozorovich ◽  
Ahmad Hosseini-Bandegharaei ◽  
Hai Nguyen Tran ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Surface Complexation ◽  
Bet Surface Area ◽  
Precipitation Method ◽  
Maximum Adsorption Capacity ◽  
Zeolite Nay ◽  
Inner Surface ◽  
Zeolite Composite

Abstract The research aimed to develop a novel mesoporous aluminosilicate/zeolite composite by the template co-precipitation method. The effect of aluminosilicate (AlSi) and zeolite (NaY) on the basic properties and adsorption capacity of the resultant composite was conducted at different mass ratios of AlSi/NaY (i.e., 5/90, 10/80, 15/85, 20/80, and 50/50). The adsorption characteristics of such composite and its feedstock materials (i.e., aluminosilicates and zeolite) towards radioactive Sr2+ ions and toxic metals (Cu2+ and Pb2+ ions) in aqueous solutions were investigated. Results indicated that BET surface area (SBET), total pore volume (VTotal), and mesopore volume (VMeso) of prepared materials followed the decreasing order: aluminosilicate (890 m2/g, 0.680 cm3/g, and 0.644 cm3/g) > zeolite (623 m2/g, 0.352 cm3/g, and 0.111 cm3/g) > AlSi/NaY (20/80) composite (370 m2/g, 0.254 cm3/g, and 0.154 cm3/g, respectively). The Langmuir maximum adsorption capacity (Qm) of metal ions (Sr2+, Cu2+, and Pb2+) in single-component solution was 260 mg/g, 220 mg/g, and 161 mg/g (for zeolite), 153 mg/g, 37.9 mg/g, and 66.5 mg/g (for aluminosilicate), and 186 mg/g, 140 mg/g, and 77.8 mg/g for (AlSi/NaY (20/80) composite), respectively. Ion exchange was regarded as a domain adsorption mechanism of metal ions in solution by zeolite; meanwhile, inner-surface complexation was domain one for aluminosilicate. Ion exchange and inner-surface complexation might be mainly responsible for adsorbing metal ions onto the AlSi/NaY composite. Pore-filling mechanism was a less important contributor during the adsorption process. The results of competitive adsorption under binary-components (Cu2+ and Sr2+) and ternary-components (Cu2+, Pb2+, and Sr2) demonstrated that the removal efficacy of target metals by the aluminosilicate, zeolite, and their composite remarkably decreased. The synthesized AlSi/NaY composite might serve as a promising adsorbent for real water treatment.

Determination of γ-hydroxybutyrate in human urine samples by ion exclusion and ion exchange two-dimensional chromatography system

2017 ◽  
Vol 1528 ◽  
pp. 35-40 ◽  
Author(s):  
Junwei Liu ◽  
Zhifen Deng ◽  
Zuoyi Zhu ◽  
Yong Wang ◽  
Guoqing Wang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Human Urine ◽  
Urine Samples ◽  
Two Dimensional ◽  
Human Urine Samples ◽  
Ion Exclusion

Thermodynamic Modeling and Sensitivity Analysis of Kd Values for Radionuclide Migration in Sedimentary Host Rocks

2003 ◽  
Vol 807 ◽  
Author(s):  
Caterina Talerico ◽  
Michael Ochs ◽  
Shinzo Ueta ◽  
Noriyuki Sasaki
Keyword(s):  
Sensitivity Analysis ◽  
Ion Exchange ◽  
Mineral Assemblage ◽  
Surface Complexation ◽  
Critical Component ◽  
Radionuclide Migration ◽  
Sorption Model ◽  
Geochemical Parameters ◽  
Kd Values ◽  
Host Rocks

ABSTRACTThe effects of key geochemical parameters on Kd values for radionuclides in the host rock (pumice, sandstone) of a LLW repository were elucidated through a sensitivity analysis, using a thermodynamic speciation/sorption model for the elements Sr and Ni. The complex mineral assemblage of the rock was approximated by a component-additivity approach. Using published ion exchange and surface complexation parameters, Kd for both Sr and Ni could be well explained by the same model mineralogy and surface chemistry. Model results suggest that pCO2 can have a significant effect on Kd, and that a correct approximation of groundwater chemistry is a critical component of sorption modeling.

Facile fabrication and enhanced photosensitized degradation performance of the g-C3N4–Bi2O2CO3 composite

2014 ◽  
Vol 43 (22) ◽  
pp. 8331-8337 ◽  
Author(s):  
Miao Xiong ◽  
Lang Chen ◽  
Qing Yuan ◽  
Jie He ◽  
Sheng-Lian Luo ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Facile Fabrication ◽  
Degradation Activity

Flower-like Bi2O2CO3 and g-C3N4–Bi2O2CO3 microspheres with a high adsorption ability were synthesized using a facile method, and their dye-induced photosensitized degradation activity under visible light irradiation was evaluated.

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