Journal article Closed Access

Correction of the effects of carbon dioxide and hydrogen sulfide on electrostatic cell monitors measurements of radon in water

Begy Robert-Csaba; Codrin Savin; Alida Timar-Gabor

JSON Export

  "owners": [
  "doi": "10.1016/j.jece.2021.107040", 
  "stats": {
    "version_unique_downloads": 1.0, 
    "unique_views": 12.0, 
    "views": 14.0, 
    "version_views": 14.0, 
    "unique_downloads": 1.0, 
    "version_unique_views": 12.0, 
    "volume": 2254188.0, 
    "version_downloads": 1.0, 
    "downloads": 1.0, 
    "version_volume": 2254188.0
  "links": {
    "latest_html": "", 
    "doi": "", 
    "badge": "", 
    "html": "", 
    "latest": ""
  "created": "2022-01-12T07:57:39.000129+00:00", 
  "updated": "2022-01-13T12:00:01.902327+00:00", 
  "conceptrecid": "5839746", 
  "revision": 2, 
  "id": 5839747, 
  "metadata": {
    "access_right_category": "danger", 
    "doi": "10.1016/j.jece.2021.107040", 
    "description": "<p>The present study shows that the presence of hydrogen sulfide and carbon dioxide in water have a negative effect<br>\non the accuracy of radon measurements in samples when an electrostatic ion collector device (RAD7) is used.CO2<br>\nconcentrations between 0.65 g/l and 5.19 g/l were generated in water samples containing 222Rn activities<br>\nranging from 23.4 &plusmn; 0.9 Bq/l to 6.7 &plusmn; 0.9 Bq/l, after which the samples were measured by a RAD7 device, and<br>\nthe results compared to the radon activity values of the gas-free samples. The same procedure was followed for<br>\nH2S concentrations from 0.125 mg/l to 3 mg/l. In both cases, a major impact was observed, the radon apparent<br>\nspecific activities decreasing exponentially with gas concentration. For a CO2 concentration of 1.29 g/l, the<br>\napparent specific activity underestimated the true value by 24.5%, while for a concentration of 5.19 g/l CO2 the<br>\ndecrease was of 57%. For H2S, the radon measured values decreased by 42.5% for concentrations as low as 0.5<br>\nmg/l, culminating in a reduction of 86.9% for 3 mg/l H2S. We are attributing these effects to 218Po neutralization<br>\nprocesses, which reduces the electrostatic efficiency of the silicon detector system. To eliminate the interferences<br>\nof these gases on RAD7 measurements, a sample preparation method was developed and tested, involving the<br>\nprecipitation and deposition of CO2 using Ca(OH)2, and H2S using Pb(NO3)2..The findings of the present study<br>\nclearly indicate that in order to perform valid radon measurements in gas-rich waters with RAD7, the effect of the<br>\ninterfering gases must be considered.</p>", 
    "language": "eng", 
    "title": "Correction of the effects of carbon dioxide and hydrogen sulfide on electrostatic cell monitors measurements of radon in water", 
    "journal": {
      "volume": "10", 
      "issue": "107040", 
      "title": "Journal of Environmental Chemical Engineering"
    "relations": {
      "version": [
          "count": 1, 
          "index": 0, 
          "parent": {
            "pid_type": "recid", 
            "pid_value": "5839746"
          "is_last": true, 
          "last_child": {
            "pid_type": "recid", 
            "pid_value": "5839747"
    "access_right": "closed", 
    "communities": [
        "id": "karsthives"
    "keywords": [
      "RAD7, Radon Water, Carbon dioxide, Hydrogen sulfide, 218Po neutralization"
    "publication_date": "2021-12-21", 
    "creators": [
        "affiliation": "Babes-Bolyai University, Romania", 
        "name": "Begy Robert-Csaba"
        "affiliation": "Babes-Bolyai University, Romania", 
        "name": "Codrin Savin"
        "affiliation": "Babes-Bolyai University, Romania", 
        "name": "Alida Timar-Gabor"
    "notes": "EEA and Norway Grants, EEA-RO-NO-2018-0126, 3/2019.", 
    "resource_type": {
      "subtype": "article", 
      "type": "publication", 
      "title": "Journal article"
Views 14
Downloads 1
Data volume 2.3 MB
Unique views 12
Unique downloads 1


Cite as