Correlation between Li+ adsorption capacity and the preparation conditions of spinel lithium manganese precursor

2006 ◽  
Vol 177 (17-18) ◽  
pp. 1421-1428 ◽  
Author(s):  
L WANG ◽  
W MA ◽  
R LIU ◽  
H LI ◽  
C MENG
Keyword(s):  
Adsorption Capacity ◽  
Preparation Conditions ◽  
Lithium Manganese ◽  
Li Adsorption ◽  
Manganese Precursor

scholarly journals Al-doped H2TiO3 ion sieve with enhanced Li+ adsorption performance

RSC Advances ◽  
2021 ◽  
Vol 11 (55) ◽  
pp. 34988-34995
Author(s):  
Xianyang Dai ◽  
Honglong Zhan ◽  
Zhiqiang Qian ◽  
Jun Li ◽  
Zhong Liu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Performance ◽  
Li Adsorption

H2TiO3 (HTO) is considered to be one of the most promising adsorbents for lithium recovery from aqueous lithium resources duo to its highest theoretical adsorption capacity.

Preparation and Adsorption Properties of Starch-g-Polyacrylamide/Montmorillonite Nanocomposites

2015 ◽  
Vol 1120-1121 ◽  
pp. 343-346
Author(s):  
Cai Ning Zhang ◽  
Xu Man Wang
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Capacity ◽  
Crosslinking Agent ◽  
Adsorption Properties ◽  
Experimental Results ◽  
Solution Polymerization ◽  
Preparation Conditions ◽  
Montmorillonite Nanocomposites

By means of solution polymerization, a series of cross-linked starch-g-polyacrylamide/ montmorillonite (St-g-PAM/MMT) nanocomposites were prepared and used to adsorb methylene blue (MB). The effects of different preparation conditions on the adsorption capacity of the nanocomposites were investigated. The experimental results demonstrated that the prepared St-g-PAM/MMT nanocomposites were effective adsorbents for removal of MB from aqueous solution. Furthermore, adsorption capacity increased with the MMT contents up to 14% and decreased as the MMT contents further increased. Adsorption capacity increased with the increasing of the ratio of starch to acrylamide, whereas adsorption capacity decreased with the increasing of crosslinking agent contents.

scholarly journals Single-Stage Microwave-Assisted Coconut-Shell-Based Activated Carbon for Removal of Dichlorodiphenyltrichloroethane (DDT) from Aqueous Solution: Optimization and Batch Studies

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Azrina Aziz ◽  
Mohamad Nasran Nasehir Khan ◽  
Mohamad Firdaus Mohamad Yusop ◽  
Erniza Mohd Johan Jaya ◽  
Muhammad Azan Tamar Jaya ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Radiation Power ◽  
Total Pore Volume ◽  
Single Stage ◽  
Coconut Shell ◽  
Bet Surface Area ◽  
Adsorption System ◽  
Average Pore ◽  
Preparation Conditions

This research aims to optimize preparation conditions of coconut-shell-based activated carbon (CSAC) and to evaluate its adsorption performance in removing POP of dichlorodiphenyltrichloroethane (DDT). The CSAC was prepared by activating the coconut shell via single-stage microwave heating under carbon dioxide, CO2 flow. The total pore volume, BET surface area, and average pore diameter of CSAC were 0.420 cm3/g, 625.61 m2/g, and 4.55 nm, respectively. The surface of CSAC was negatively charged shown by the zeta potential study. Response surface methodology (RSM) revealed that the optimum preparation conditions in preparing CSAC were 502 W and 6 min for radiation power and radiation time, respectively, which corresponded to 84.83% of DDT removal and 37.91% of CSAC’s yield. Adsorption uptakes of DDT were found to increase with an increase in their initial concentration. Isotherm study revealed that DDT-CSAC adsorption system was best described by the Langmuir model with monolayer adsorption capacity, Qm of 14.51 mg/g. The kinetic study confirmed that the pseudo-second-order model fitted well with this adsorption system. In regeneration studies, the adsorption efficiency had slightly dropped from 100% to 83% after 5 cycles. CSAC was found to be economically feasible for commercialization owing to its low production cost and high adsorption capacity.

Desulfurization performance of MgO/ rice straw biochar adsorbent prepared by co-precipitation/calcination route

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 4738-4752
Author(s):  
Jiali Chen ◽  
Lianhan Huang ◽  
Liming Sun ◽  
Xiaofan Zhu
Keyword(s):  
Adsorption Capacity ◽  
Calcination Temperature ◽  
Rice Straw ◽  
Active Sites ◽  
Weight Ratio ◽  
Preparation Conditions ◽  
So2 Adsorption ◽  
Chloride Hexahydrate ◽  
Rice Straw Biochar ◽  
Co Precipitation

A solid adsorbent for SO2 adsorption was prepared from magnesium salt/rice straw via co-precipitation/calcination. The effects of various preparation conditions, including the calcination temperature, the weight ratio of Mg/rice straw, magnesium salts, and amine precipitants, were investigated relative to their effects on the desulfurization performance of adsorbents. Maximum sulfur adsorption capacity (260 mg/g) was obtained with MgO/rice straw biochar adsorbent using tetraethylenepentamine (TEPA) as the precipitants, and the preparation conditions included a calcination temperature of 400 °C, a Mg/rice straw weight ratio of 1.2, and magnesium chloride hexahydrate (MgCl2·6H2O) as the magnesium source. The rice straw biochar-supported MgO sample displayed a high SO2 adsorption capacity due to its excellent textural properties, large specific surface areas, small crystallite size, numerous surface active sites of MgO nanoparticles, and introduced N-H groups. The physical and chemical properties of samples were investigated by field emission scanning electron microscopy (FESEM), Brunauer-Emmett-Teller (BET) analyses, Fourier transform infrared spectrometer (FT-IR), elemental analysis (EA), and X-ray diffraction (XRD).

Preparation of Calcium Silicate Using Hazardous Solid Wastes and its Application in Treatment of Phosphate-Containing Wastewater

2014 ◽  
Vol 937 ◽  
pp. 652-658
Author(s):  
Xin Hua Zhu ◽  
Zhao Zhang ◽  
Jun Shen
Keyword(s):  
Adsorption Capacity ◽  
Calcium Silicate ◽  
Hydrated Lime ◽  
High Specific Surface Area ◽  
Raw Material ◽  
Molar Ratio ◽  
Residual Concentration ◽  
P Adsorption ◽  
Preparation Conditions ◽  
Silicate Sample

The silica, one of the by-products of fluorine industry, contains soluble fluoride which is harmful to the environment. Therefore, a study on fixing soluble fluoride was conducted by hydrothermal method with the silica as raw material and adding hydrated lime (HL), and the nanowires-reticulated calcium silicate with high specific surface area up to 143.8m2/g was prepared at the same time. The prepared calcium silicate was used as adsorbent in the experiments of phosphorus (P) adsorption from aqueous solution, the adsorption capacity, adsorption rate and P removability were characterized. The results show that the preparation conditions affect distinctly the adsorption performances of calcium silicate, especially, the dosage Ca/Si molar ratio. For the optimized calcium silicate sample, the total P adsorption capacity is 125.7mg/g and the exchange rate of Ca2+reaches 95.8%, the P residual concentration is only 0.3mg/L, the saturated adsorption time is 3900 min, when the simulation solution with P concentration of 100 mg/L is treated. The P residual concentration is only 0.1mg/L for the simulation solution of 56.12mg/L.

Preparation of three-dimensional macroporous–mesoporous lithium ion sieve with high Li+ adsorption capacity

2017 ◽  
Vol 44 (2) ◽  
pp. 1105-1117 ◽  
Author(s):  
Na Li ◽  
Kaifeng Gan ◽  
Deli Lu ◽  
Jinlong Zhang ◽  
Lingzhi Wang
Keyword(s):  
Adsorption Capacity ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Li Adsorption

scholarly journals Optimization of biochar preparation from the stem of Eichhornia crassipes using response surface methodology on adsorption of Cd2+

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Runjuan Zhou ◽  
Ming Zhang ◽  
Jinhong Zhou ◽  
Jinpeng Wang
Keyword(s):  
Response Surface Methodology ◽  
Adsorption Capacity ◽  
Response Surface ◽  
Heating Rate ◽  
Eichhornia Crassipes ◽  
Heating Temperature ◽  
Removal Rate ◽  
Heating Time ◽  
Optimal Conditions ◽  
Preparation Conditions

AbstractIn this study, preparation of Eichhornia crassipes stem biochar (ECSBC) was optimized and applied for the removal of Cd2+ from aqueous solution. To obtain the best adsorption capacity of ECSBC, the response surface methodology (RSM) was used to optimize the preparation conditions of ECSBC (OECSBC). The interactions among heating time (X1), heating temperature (X2) and heating rate (X3) were designed by Box-Behnken Design (BBD) experiments. The software gave seventeen runs experiment within the optimal conditions towards two response variables (removal rate and adsorption capacity for Cd2+). The results showed that the mathematical model could fit the experimental data very well and the significance of the influence factors followed the order as heating temperature (X2) > heating rate (X3) > heating time (X1), and the influence of interaction term is: X1 and X2 (heating time and heating temperature) > X2 and X3 (heating temperature and heating rate) > X1 and X3 (heating time and heating rate). Based on the analysis of variance and the method of numerical expected function, the optimal conditions were heating time of 2.42 h, heating temperature of 393 °C, and heating rate of 15.56 °C/min. Under the optimum conditions, the predicted the maximum removal rate and adsorption capacity were 85.2724% and 21.168 mg/g, respectively, and the experimental value of removal rate and adsorption capacity for Cd2+ were 80.70% and 20.175 mg/g, respectively, the deviation from the predicted value were 5.36% and 4.69%. The results confirmed that the RSM can optimize the preparation conditions of ECSBC, and the adsorption capacity of OECSB was improved.

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