NUCLEAR TECHNIQUES, Volume. 47, Issue 10, 100302(2024)
Research on the carbonization law of cement and its adsorption of 137Cs
Figures & Tables(12)
Fig. 3. SEM pattern of carbonized cement(a) Cement paste, (b) Carbonization for 28 d, (c) Carbonization for 1 d, (d) Carbonization for 3 d, (e) Carbonization for 7 d
Fig. 4. Adsorption-desorption and pore size distribution curve of carbonized cement(a) Cement paste, (b) Carbonization for 1 d, (c) Carbonization for 3 d, (d) Carbonization for 7 d, (e) Carbonization for 28 d
Fig. 5. TGA-DTG curve of carbonized cement(a) Cement paste, (b) Carbonization for 1 d, (c) Carbonization for 3 d, (d) Carbonization for 7 d, (e) Carbonization for 28 d
Fig. 6. Effect of time on the adsorption of 137Cs on carbonized cement
Fig. 7. Fitting curve of dynamic model of adsorption of 137Cs by carbonized cement(a) Quasi-first-order kinetic model, (b) Quasi-second-order kinetic model
Fig. 8. Langmuir isothermal model fitting curve of carbonized cement adsorption 137Cs(a) Cemrnt paste, (b) Carbonization cement
Fig. 9. Freundlich isothermal model fitting curve of carbonized cement adsorption 137Cs(a) Cemrnt paste, (b) Carbonization cement
Table 1. Specific surface area of cement before and after carbonization
View tableView in ArticleTable 1. Specific surface area of cement before and after carbonization
样品名称Sample name 比表面积Specific surface area / m2∙g-1 水泥净浆Cement paste 10.687 碳化1 d水泥Carbonize 1 d cement 41.896 碳化3 d水泥Carbonize 3 d cement 49.336 碳化7 d水泥Carbonize7 d cement 51.482 碳化28 d水泥Carbonize 28 d cement 68.523
Table 2. Kinetic model parameters of adsorption of 137Cs by carbonated cement
View tableView in ArticleTable 2. Kinetic model parameters of adsorption of 137Cs by carbonated cement
样品Sample 准一级动力学模型Quasi-first-order kinetic model 准二级动力学模型Quasi-second-order kinetic model Qe(cal) / Bq∙g-1 Qe(exp) / Bq∙g-1 k1 / h-1 R2 Qe(cal) / Bq∙g-1 Qe(exp) / Bq∙g-1 k2 / g∙Bq-1∙h-1 R2 水泥净浆Cement paste 10.22 91.43 0.222 0.850 92.51 91.43 0.051 0.999 碳化1 d Carbonize 1 d 12.12 199.86 0.293 0.993 200.80 199.86 0.075 0.999 碳化3 d Carbonize 3 d 7.07 204.37 0.233 0.989 204.91 204.37 0.107 0.999 碳化7 d Carbonize 7 d 8.92 197.99 0.179 0.781 198.81 197.99 0.059 0.999 碳化28 d Carbonize 28 d 23.06 195.17 0.304 0.958 196.46 195.17 0.036 0.999
Table 3. Isothermal model parameters of adsorption of 137Cs by carbonated cement
View tableView in ArticleTable 3. Isothermal model parameters of adsorption of 137Cs by carbonated cement
样品名称Sample Langmuir吸附等温模型Langmuir adsorption isothermal model Freundlich吸附等温模型Freundlich adsorption isothermal model Qm / Bq∙g-1 KL / L∙Bq-1 R2 KF / Bq1-n∙Ln∙g-1 n R2 水泥净浆Cement paste 148.81 0.002 0.969 0.643 1.343 0.703 碳化1 d Carbonize 1 d 925.93 0.003 0.984 3.287 1.188 0.611 碳化3 d Carbonize 3 d 699.30 0.006 0.981 23.693 2.258 0.469 碳化7 d Carbonize 7 d 653.59 0.004 0.996 7.594 1.592 0.791 碳化28 d Carbonize 28 d 636.94 0.003 0.999 3.926 1.397 0.662
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Gang YANG, Bingqi LIU, Guoyi LU, Yangchun LENG, Xianguo TUO. Research on the carbonization law of cement and its adsorption of 137Cs[J]. NUCLEAR TECHNIQUES, 2024, 47(10): 100302
Paper Information
Category: NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE
Received: Feb. 1, 2024
Accepted: --
Published Online: Dec. 13, 2024
The Author Email: LIU Bingqi (LIUBingqi)
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