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Generally, devices with radioactive sources are used to measure the variation of FFT density or solids concentration inline, but to date there is no suitable device for in situ monitoring in tailings storage facilities such as large tailings ponds. In this study, an alternative method using high\u2010resolution spectrometry based on a low radiation intensity source and a cadmium telluride (CdTe) detector was used to measure the solids content in tailings samples based on X\u2010ray attenuation. The radiation source used in the experiment was a 1 \u03bcCi <jats:sup>133<\/jats:sup>Ba. GEANT4, a Monte Carlo\u2013based simulation code that calculates the transmission of radiation through matter, was used to simulate the results of this study and build calibration curves that can determine the solids content concentration based on measured sample composition. Experiments and simulations were performed on various concentrations of both actual FFT samples from tailings facilities and kaolin as a model material. Good agreement between the experimental and simulation results was observed, paving the way for a potential real\u2010time solids content measurement system that could be deployed over large areas to measure the settling of FFT in tailings ponds.<\/jats:p>","DOI":"10.1002\/jeq2.20230","type":"journal-article","created":{"date-parts":[[2021,4,16]],"date-time":"2021-04-16T19:22:07Z","timestamp":1618600927000},"page":"945-954","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["X\u2010ray radiation monitor for measuring solids content in fluid fine tailings"],"prefix":"10.1002","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3319-8186","authenticated-orcid":false,"given":"Bo","family":"Yu","sequence":"first","affiliation":[{"name":"Donadeo Innovation Centre for Engineering Univ. of Alberta  9211 116 Street NW, Edmonton Alberta AB T6G 1H9 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"Donadeo Innovation Centre for Engineering Univ. of Alberta  9211 116 Street NW, Edmonton Alberta AB T6G 1H9 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Talwinder K.","family":"Sraw","sequence":"additional","affiliation":[{"name":"Donadeo Innovation Centre for Engineering Univ. of Alberta  9211 116 Street NW, Edmonton Alberta AB T6G 1H9 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tulika","family":"Srivastava","sequence":"additional","affiliation":[{"name":"Donadeo Innovation Centre for Engineering Univ. of Alberta  9211 116 Street NW, Edmonton Alberta AB T6G 1H9 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea","family":"Sedgwick","sequence":"additional","affiliation":[{"name":"Technology Access Centre for Oil Sands Sustainability Northern Alberta Institute of Technology  10210 Princess Elizabeth Ave NW Edmonton AB T5G 0Y2 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1320-2253","authenticated-orcid":false,"given":"Abu","family":"Junaid","sequence":"additional","affiliation":[{"name":"Canadian Natural Resources Limited  2100, 855\u20102 Street SW Calgary AB T2P 4J8 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manisha","family":"Gupta","sequence":"additional","affiliation":[{"name":"Donadeo Innovation Centre for Engineering Univ. of Alberta  9211 116 Street NW, Edmonton Alberta AB T6G 1H9 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Fedosejevs","sequence":"additional","affiliation":[{"name":"Donadeo Innovation Centre for Engineering Univ. of Alberta  9211 116 Street NW, Edmonton Alberta AB T6G 1H9 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Y. 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