{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:24:09Z","timestamp":1760145849979,"version":"build-2065373602"},"reference-count":71,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2024,9,9]],"date-time":"2024-09-09T00:00:00Z","timestamp":1725840000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Hydrogen sulfide is present in active or extinct volcanic areas (mofettas). The habitable premises in these areas are affected by the presence of hydrogen sulfide, which, even in low concentrations, gives off a bad to unbearable smell. If the living spaces considered are closed enclosures, then a system can be designed to reduce the concentration of hydrogen sulfide. This paper presents a membrane-based way to reduce the hydrogen sulfide concentration to acceptable limits using a cellulosic derivative\u2013propylene hollow fiber-based composite membrane module. The cellulosic derivatives considered were: carboxymethyl\u2013cellulose (NaCMC), P1; cellulose acetate (CA), P2; methyl 2\u2013hydroxyethyl\u2013cellulose (MHEC), P3; and hydroxyethyl\u2013cellulose (HEC), P4. In the permeation module, hydrogen sulfide is captured with a solution of cadmium that forms cadmium sulfide, usable as a luminescent substance. The composite membranes were characterized by SEM, EDAX, FTIR, FTIR 2D maps, thermal analysis (TG and DSC), and from the perspective of hydrogen sulfide air removal performance. To determine the process performances, the variables were as follows: the nature of the cellulosic derivative\u2013polypropylene hollow fiber composite membrane, the concentration of hydrogen sulfide in the polluted air, the flow rate of polluted air, and the pH of the cadmium nitrate solution. The pertraction efficiency was highest for the sodium carboxymethyl\u2013cellulose (NaCMC)\u2013polypropylene hollow fiber membrane, with a hydrogen sulfide concentration in the polluted air of 20 ppm, a polluted air flow rate (QH2S) of 50 L\/min, and a pH of 2 and 4. The hydrogen sulfide flux rates, for membrane P1, fall between 0.25 \u00d7 10\u22127 mol\u00b7m2\u00b7s\u22121 for the values of QH2S = 150 L\/min, CH2S = 20 ppm, and pH = 2 and 0.67 \u00d7 10\u22127 mol\u00b7m\u22122\u00b7s\u22121 for the values of QH2S = 50 L\/min, CH2S = 60 ppm, and pH = 2. The paper proposes a simple air purification system containing hydrogen sulfide, using a module with composite cellulosic derivative\u2013polypropylene hollow fiber membranes.<\/jats:p>","DOI":"10.3390\/ma17174437","type":"journal-article","created":{"date-parts":[[2024,9,9]],"date-time":"2024-09-09T11:31:59Z","timestamp":1725881519000},"page":"4437","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Reduction in Olfactory Discomfort in Inhabited Premises from Areas with Mofettas through Cellulosic Derivative\u2013Polypropylene Hollow Fiber Composite Membranes"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6082-830X","authenticated-orcid":false,"given":"Paul Constantin","family":"Albu","sequence":"first","affiliation":[{"name":"Radioisotopes and Radiation Metrology Department (DRMR), National Institute of Physics and Nuclear Engineering (IFIN) Horia Hulubei, 023465 M\u0103gurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3238-1672","authenticated-orcid":false,"given":"Andreia","family":"P\u00eer\u021bac","sequence":"additional","affiliation":[{"name":"Analytical Chemistry and Environmental Engineering Department, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3371-4136","authenticated-orcid":false,"given":"Ludmila","family":"Motelica","sequence":"additional","affiliation":[{"name":"National Research Center for Micro and Nanomaterials, Department of Science and Engineering of Nanomaterials and Oxide Materials, National University of Science and Technology POLITEHNICA Bucharest, 060042 Bucharest, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8891-8948","authenticated-orcid":false,"given":"Aurelia Cristina","family":"Nechifor","sequence":"additional","affiliation":[{"name":"Analytical Chemistry and Environmental Engineering Department, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Geani Teodor","family":"Man","sequence":"additional","affiliation":[{"name":"Analytical Chemistry and Environmental Engineering Department, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania"},{"name":"National Research and Development Institute for Cryogenics and Isotopic Technologies\u2014ICSI, 240050 R\u00e2mnicu-V\u00e2lcea, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexandra Raluca","family":"Grosu","sequence":"additional","affiliation":[{"name":"Analytical Chemistry and Environmental Engineering Department, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Szidonia-Katalin","family":"Tanczos","sequence":"additional","affiliation":[{"name":"Department of Bioengineering, University Sapientia of Miercurea-Ciuc, 500104 Miercurea-Ciuc, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4263-7048","authenticated-orcid":false,"given":"Vlad-Alexandru","family":"Grosu","sequence":"additional","affiliation":[{"name":"Department of Electronic Technology and Reliability, Faculty of Electronics, Telecommunications and Information Technology, National University of Science and Technology POLITEHNICA Bucharest, 061071 Bucharest, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7148-926X","authenticated-orcid":false,"given":"Gheorghe","family":"Nechifor","sequence":"additional","affiliation":[{"name":"National Research Center for Micro and Nanomaterials, Department of Science and Engineering of Nanomaterials and Oxide Materials, National University of Science and Technology POLITEHNICA Bucharest, 060042 Bucharest, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,9,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Zaorska, E., Tomasova, L., Koszelewski, D., Ostaszewski, R., and Ufnal, M. 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