顾平1,
张晓媛1,
国中馨1,
张光辉1,
董丽华1
1.天津大学环境科学与工程学院,天津 300350
基金项目: 国家自然科学基金资助项目(51238006)
Treatment of iodide from simulated radioactive wastewater using novel countercurrent two-stage adsorption process
LI Xiaoyuan1,,GU Ping1,
ZHANG Xiaoyuan1,
GUO Zhongxin1,
ZHANG Guanghui1,
DONG Lihua1
1.School of Environmental Science and Engineering, Tianjin University, Tianjin 300350,China
-->
摘要
HTML全文
图
参考文献
相关文章
施引文献
资源附件
访问统计
摘要:为解决除碘吸附剂吸附效率较低的问题,开发出排除吸附剂脱附干扰的新型二级逆流吸附工艺。采用烧杯实验考察吸附剂对自来水中I-的吸附特性,初始I-浓度为2.00 mg·L-1,90 min达到吸附平衡,且较好符合Langmuir吸附等温式。这种吸附剂吸附I-后会发生显著的脱附。基于吸附剂的特性和Langmuir吸附等温式,设计出新型二级逆流吸附工艺,并提出该工艺的计算模型,用于预测该工艺出水I-的浓度。结果表明,该工艺能有效提高模拟放射性废水中I-的去除效率,其出水I-的平均浓度为0.150 mg·L-1,去除率达到92.5%。计算出水I-浓度为0.124 mg·L-1,去除率为93.8%,实测值与模型计算值接近。与常规单级吸附工艺相比,在相同的吸附剂投加量下,I-去除率由78.0%提高至92.5%。
关键词: 放射性废水/
碘离子/
吸附/
自来水/
新型二级逆流吸附工艺
Abstract:In order to solve the problem of the low iodide removal efficiency, a new countercurrent two-stage adsorption process was developed to eliminate the interference of the desorption. Jar tests were conducted for removal of simulated radioactive iodide from tap water with the adsorbent. The initial iodide concentration was 2.00 mg·L-1. The adsorption process fitted with Langmuir adsorption isotherm well. The equilibrium was reached within 90 minutes. The obvious desorption of iodide from the loaded adsorbent was observed. Based on the properties of the adsorbent and Langmuir adsorption isotherm, the new countercurrent two-stage adsorption process was designed and the calculation method of the process was deduced to predict the concentration of iodide in the effluent. The experiment of the new process for removing iodide was designed and used for validating the calculation method. The results indicated that the new countercurrent two-stage adsorption process could remove iodide effectively. The concentration of iodide in the effluent was reduced to 0.150 mg·L-1, and iodide removal efficiency attained 92.5%. The calculated iodide removal efficiency was 93.8% at the same adsorbent dosage. The experimental values fitted well with the values calculated by the model. Compared with the conventional single stage adsorption process, the iodide removal efficiency could increase from 78.0% to 92.5% at the same dosage of adsorbent by using the process.
Key words:radioactive wastewater/
iodide/
adsorption/
tap water/
new countercurrent two-stage adsorption process.
| [1] | KULYUKHIN S A, KAMENSKAYA A N, KONOVALOVA N A.Chemistry of radioactive iodine in aqueous media: Basic and applied aspects[J].Radiochemistry,2011,3(2):123-141 |
| [2] | 贾麟, 刘阳, 张光辉, 等.去除水体中放射性碘核素的研究进展[J].工业水处理,2015,5(7):10-13 |
| [3] | RILEY B J, VIENNA J D, STRACHAN D M, et al.Materials and processes for the effective capture and immobilization of radioiodine: A review[J].Journal of Nuclear Materials,2016,0:307-326 |
| [4] | OHTA T, MAHARA Y, KUBOTA T, et al.Prediction of groundwater contamination with 137Cs and 131I from the Fukushima nuclear accident in the Kanto district[J].Journal of Environmental Radioactivity,2012,1:38-41 |
| [5] | LIU X, CHEN G R, LEE D J,et al.Adsorption removal of cesium from drinking waters: A mini review on use of biosorbents and other adsorbents[J].Bioresource Technology,2014,0(5):142-149 |
| [6] | RAHMAN R, IBRAHIUM H, HUNG Y T.Liquid radioactive wastes treatment: A review[J].Water,2011,3(2):551-565 |
| [7] | LIU Y, GU P, JIA L, et al.An investigation into the use of cuprous chloride for the removal of radioactive iodide from aqueous solutions[J].Journal of Hazardous Materials,2015,2:82-89 |
| [8] | 杨云, 顾平, 刘阳, 等.沉淀-微滤组合工艺处理模拟含碘放射性废水[J].化工学报,2016,8(3):1211-1217 |
| [9] | KUBOTA T, FUKUTANI S, OHTA T, et al.Removal of radioactive cesium, strontium, and iodine from natural waters using bentonite, zeolite, and activated carbon[J].Journal of Radioanalytical and Nuclear Chemistry,2013,6(2):981-984 |
| [10] | ZHANG X Y, GU P, LI X Y, et al.Efficient adsorption of radioactive iodide ion from simulated wastewater by nano Cu2O/Cu modified activated carbon[J].Chemical Engineering Journal,2017,2:129-139 |
| [11] | ZHAO C, GU P, ZHANG G.A hybrid process of powdered activated carbon countercurrent two-stage adsorption and microfiltration for petrochemical RO concentrate treatment[J].Desalination,2013,0(12):9-15 |
| [12] | HAN F, ZHANG G H, GU P.Removal of cesium from simulated liquid waste with countercurrent two-stage adsorption followed by microfiltration[J].Journal of Hazardous Materials,2012,5-226(12):107-113 |
| [13] | CAO J G, GU P, ZHAO J, et al.Removal of strontium from an aqueous solution using co-precipitation followed by microfiltration (CPMF)[J].Journal of Radioanalytical and Nuclear Chemistry,2010,5(3):539-546 |
| [14] | ZHAO C, GU P, CUI H, et al.Reverse osmosis concentrate treatment via a PAC-MF accumulative countercurrent adsorption process[J].Water Research,2012,6(1):218-226 |
| [15] | 中华人民共和国卫生部, 中国国家标准化管理委员会.生活饮用水标准检验方法:GB/T 5750-2006[S].北京: 中国标准出版社, 2006 |
| [16] | GE P, WAN L J, XU Y J.Adorption and kinetics studies of baritite on Cr (Ⅵ) from aqueous solutions[J].Advanced Materials Research,2011,7-353:281-284 |
| [17] | 梅特卡夫和埃迪公司,乔巴诺格劳斯,伯顿,等.废水工程处理及回用[M].北京:化学工业出版社,2004:825-826 |
| [18] | 李圭白,张杰.水质工程学[M].北京:中国建筑工业出版社,2013:178-179 |
| [19] | 中华人民共和国卫生部, 中国国家标准化管理委员会.生活饮用水卫生标准:GB/T 5749-2006[S].北京: 中国标准出版社, 2006 |
| [20] | 世界卫生组织.饮用水水质准则[M].4版.上海:上海交通大学出版社,2011 |
Turn off MathJax -->
点击查看大图计量
文章访问数:1108
HTML全文浏览数:675
PDF下载数:649
施引文献:0
出版历程
刊出日期:2018-02-08
-->
新型二级逆流吸附工艺处理模拟含碘放射性废水
李晓媛1,,顾平1,
张晓媛1,
国中馨1,
张光辉1,
董丽华1
1.天津大学环境科学与工程学院,天津 300350
基金项目: 国家自然科学基金资助项目(51238006)
关键词: 放射性废水/
碘离子/
吸附/
自来水/
新型二级逆流吸附工艺
摘要:为解决除碘吸附剂吸附效率较低的问题,开发出排除吸附剂脱附干扰的新型二级逆流吸附工艺。采用烧杯实验考察吸附剂对自来水中I-的吸附特性,初始I-浓度为2.00 mg·L-1,90 min达到吸附平衡,且较好符合Langmuir吸附等温式。这种吸附剂吸附I-后会发生显著的脱附。基于吸附剂的特性和Langmuir吸附等温式,设计出新型二级逆流吸附工艺,并提出该工艺的计算模型,用于预测该工艺出水I-的浓度。结果表明,该工艺能有效提高模拟放射性废水中I-的去除效率,其出水I-的平均浓度为0.150 mg·L-1,去除率达到92.5%。计算出水I-浓度为0.124 mg·L-1,去除率为93.8%,实测值与模型计算值接近。与常规单级吸附工艺相比,在相同的吸附剂投加量下,I-去除率由78.0%提高至92.5%。
English Abstract
Treatment of iodide from simulated radioactive wastewater using novel countercurrent two-stage adsorption process
LI Xiaoyuan1,,GU Ping1,
ZHANG Xiaoyuan1,
GUO Zhongxin1,
ZHANG Guanghui1,
DONG Lihua1
1.School of Environmental Science and Engineering, Tianjin University, Tianjin 300350,China
Keywords: radioactive wastewater/
iodide/
adsorption/
tap water/
new countercurrent two-stage adsorption process
Abstract:In order to solve the problem of the low iodide removal efficiency, a new countercurrent two-stage adsorption process was developed to eliminate the interference of the desorption. Jar tests were conducted for removal of simulated radioactive iodide from tap water with the adsorbent. The initial iodide concentration was 2.00 mg·L-1. The adsorption process fitted with Langmuir adsorption isotherm well. The equilibrium was reached within 90 minutes. The obvious desorption of iodide from the loaded adsorbent was observed. Based on the properties of the adsorbent and Langmuir adsorption isotherm, the new countercurrent two-stage adsorption process was designed and the calculation method of the process was deduced to predict the concentration of iodide in the effluent. The experiment of the new process for removing iodide was designed and used for validating the calculation method. The results indicated that the new countercurrent two-stage adsorption process could remove iodide effectively. The concentration of iodide in the effluent was reduced to 0.150 mg·L-1, and iodide removal efficiency attained 92.5%. The calculated iodide removal efficiency was 93.8% at the same adsorbent dosage. The experimental values fitted well with the values calculated by the model. Compared with the conventional single stage adsorption process, the iodide removal efficiency could increase from 78.0% to 92.5% at the same dosage of adsorbent by using the process.
