PMID- 29358140
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180323
LR  - 20180323
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 626
DP  - 2018 Jun 1
TI  - Enhanced removal of iodide ions by nano Cu(2)O/Cu modified activated carbon from 
      simulated wastewater with improved countercurrent two-stage adsorption.
PG  - 612-620
LID - S0048-9697(18)30099-8 [pii]
LID - 10.1016/j.scitotenv.2018.01.078 [doi]
AB  - A newly developed adsorbent nano Cu(2)O/Cu-modified activated carbon composite 
      (nano Cu(2)O/Cu-C) was used to remove radioactive iodide ions (I(-)) from 
      simulated wastewater. The emphasis of this research is to improve adsorption 
      performance and obtain higher I(-) removal efficiency compared with the 
      single-stage adsorption. To fully develop the amount of adsorption by nano 
      Cu(2)O/Cu-C, and to increase the decontamination factor (DF) of I(-), an improved 
      countercurrent two-stage adsorption (ICTA) process was introduced. In the ICTA 
      process, measures dealing with desorption of loaded adsorbent in the stage-two 
      adsorption were taken and more extensive application of countercurrent two-stage 
      adsorption (CTA) process could be made after the improvement to ICTA process in 
      this study. Furthermore, in order to analyze the process and determine the I(-) 
      concentration in the effluent, a calculation method was devised based on the 
      Langmuir isotherm equations and adsorption accumulation principle. The mean DFs 
      were 177, 166, and 89.7, respectively, when the initial I(-) concentrations were 
      5.00, 10.0, and 20.0 mg/L; and the adsorbent dosage was 1.25 g/L. These results 
      were approximately 8.76, 8.97, and 6.79 times higher, respectively, than with 
      conventional single-stage adsorption. The experimental values of the I(-) 
      concentration were higher than the calculated ones, which could be ascribed to 
      desorption of the residual loaded adsorbent and formation of CuI in the 
      adsorption at stage 1. Formation of CuI in the adsorption at stage 1 was 
      considered to be the predominant reason.
CI  - Copyright (c) 2018 Elsevier B.V. All rights reserved.
FAU - Zhang, Xiaoyuan
AU  - Zhang X
AD  - School of Environmental Science and Engineering, Tianjin University, Tianjin 
      300350, China.
FAU - Gu, Ping
AU  - Gu P
AD  - School of Environmental Science and Engineering, Tianjin University, Tianjin 
      300350, China.
FAU - Zhou, Shishuai
AU  - Zhou S
AD  - School of Environmental Science and Engineering, Tianjin University, Tianjin 
      300350, China.
FAU - Li, Xiaoyuan
AU  - Li X
AD  - School of Environmental Science and Engineering, Tianjin University, Tianjin 
      300350, China.
FAU - Zhang, Guanghui
AU  - Zhang G
AD  - School of Environmental Science and Engineering, Tianjin University, Tianjin 
      300350, China. Electronic address: zgh@tju.edu.cn.
FAU - Dong, Lihua
AU  - Dong L
AD  - School of Environmental Science and Engineering, Tianjin University, Tianjin 
      300350, China.
LA  - eng
PT  - Journal Article
DEP - 20180219
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
OTO - NOTNLM
OT  - Decontamination factor
OT  - Desorption
OT  - Improved countercurrent two-stage adsorption
OT  - Nano Cu(2)O/Cu-C
OT  - Radioactive iodide ion removal
EDAT- 2018/01/24 06:00
MHDA- 2018/01/24 06:01
CRDT- 2018/01/24 06:00
PHST- 2017/11/03 00:00 [received]
PHST- 2018/01/07 00:00 [revised]
PHST- 2018/01/08 00:00 [accepted]
PHST- 2018/01/24 06:00 [pubmed]
PHST- 2018/01/24 06:01 [medline]
PHST- 2018/01/24 06:00 [entrez]
AID - S0048-9697(18)30099-8 [pii]
AID - 10.1016/j.scitotenv.2018.01.078 [doi]
PST - ppublish
SO  - Sci Total Environ. 2018 Jun 1;626:612-620. doi: 10.1016/j.scitotenv.2018.01.078. 
      Epub 2018 Feb 19.