{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T16:25:23Z","timestamp":1786465523817,"version":"build-2736575974"},"reference-count":38,"publisher":"American Chemical Society (ACS)","issue":"31","license":[{"start":{"date-parts":[[2026,7,26]],"date-time":"2026-07-26T00:00:00Z","timestamp":1785024000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/100015747","name":"University Grants Commission of Bangladesh","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100015747","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The discharge of chromium from tanneries is a big danger to the environment as it contaminates waterways, degrades soil, and gives rise to long-term health risks. Concurrently, the emission of NO2 from vehicle exhaust and fossil-fuel combustion leads to hazardous air pollution, intensifying environmental degradation. In this study, we explore a feasible and straightforward strategy to remove hazardous chromium(VI) and NO2 using layered double hydroxides. Layered double hydroxides (LDHs) are a type of advanced material with brucite-like layered structures, widely studied for their effective adsorption properties in environmental remediation. In our research, MgAl-CO3 LDH was synthesized by the coprecipitation method with a Mg2+\/Al3+ molar ratio of 3:1. The synthesized adsorbent and the chromate-loaded adsorbent were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) with energy-dispersive X-ray (EDX) analysis, and UV\u2013vis diffuse reflectance spectroscopy. The results showed that the desired adsorbent was successfully made and that chromium was effectively adsorbed onto the synthetic adsorbent. The adsorption performance was tested for two pollutants: Cr(VI) in water and NO2 in the atmosphere. Cr(VI) removal efficiency increased with time, reaching 75.03% removal after a contact time of 60 min. NO2 removal tests using the AEROQUAL S-500 monitor showed a modest reduction of 13.4% for MgAl-CO3 and 12.3% for MgAl-CrO4 within an hour. The results indicate a similar removal percentage of NO2 by MgAl-CO3 LDH and its chromate-loaded adsorbent. In short, these LDH compounds, due to their ease of synthesis and good adsorption capability, have significant potential as a solid adsorption medium for removing atmospheric NO2 and hexavalent chromium from water. Overall, this study highlights the significant utility of Mg\u2013Al-based LDH materials as versatile and efficient adsorbents for environmental cleanup applications in both aqueous and atmospheric systems.<\/jats:p>","DOI":"10.1021\/acsomega.6c02827","type":"journal-article","created":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T07:39:19Z","timestamp":1785137959000},"page":"46226-46236","source":"Crossref","is-referenced-by-count":0,"title":["Synthesis, Characterization,\nand Environmental Applications\nof Magnesium Aluminum (MgAl) Layered Double Hydroxides for the Removal\nof Nitrogen Dioxide and Chromium(VI)"],"prefix":"10.1021","volume":"11","author":[{"given":"Anindyashree Das","family":"Mouli","sequence":"first","affiliation":[{"name":"University of Dhaka , , ,","place":["Dhaka, Bangladesh, 1000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Md. Al-Amin","family":"Hossen","sequence":"additional","affiliation":[{"name":"University of Dhaka , , ,","place":["Dhaka, Bangladesh, 1000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2592-1407","authenticated-orcid":true,"given":"Md. Safiqul","family":"Islam","sequence":"additional","affiliation":[{"name":"University of Dhaka , , ,","place":["Dhaka, Bangladesh, 1000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad","family":"Moniruzzaman","sequence":"additional","affiliation":[{"name":"Bangladesh Council of Scientific and Industrial Research (BCSIR) , ,","place":["Dhaka, Bangladesh, 1205"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5609-6828","authenticated-orcid":true,"given":"Abdus","family":"Salam","sequence":"additional","affiliation":[{"name":"University of Dhaka , , ,","place":["Dhaka, Bangladesh, 1000"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,7,26]]},"reference":[{"key":"2026081110190423700_cit1","doi-asserted-by":"publisher","first-page":"11","DOI":"10.47981\/j.mijst.08(01)2020.160(11-15)","article-title":"Assessment of Hexavalent\nChromium Pollution in Buriganga and Dhaleshwari River Waterbodies\nAdjacent to Tannery Estates in Bangladesh","volume":"8","author":"Rahman","year":"2020","journal-title":"MIST\nInt. J. Sci. Technol."},{"key":"2026081110190423700_cit2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemosphere.2023.138804","article-title":"Biogeochemical Behaviour\nand Toxicology of Chromium\nin the Soil-Water-Human Nexus: A Review","volume":"331","author":"Mortada","year":"2023","journal-title":"Chemosphere"},{"key":"2026081110190423700_cit3","doi-asserted-by":"publisher","first-page":"2055","DOI":"10.1007\/s10311-020-01058-x","article-title":"Removal of Chromium\nfrom Wastewater by Membrane Filtration, Chemical\nPrecipitation, Ion Exchange, Adsorption Electrocoagulation, Electrochemical\nReduction, Electrodialysis, Electrodeionization, Photocatalysis and\nNanotechnology: A Review","volume":"18","author":"Peng","year":"2020","journal-title":"Environ. Chem. Lett."},{"key":"2026081110190423700_cit4","doi-asserted-by":"publisher","first-page":"743","DOI":"10.3109\/10408440903294945","article-title":"Critical Review of the Human Data on Short-Term Nitrogen\nDioxide (NO2) Exposures: Evidence for NO2 No-Effect Levels","volume":"39","author":"Hesterberg","year":"2009","journal-title":"Crit. Rev. Toxicol."},{"issue":"4","key":"2026081110190423700_cit5","doi-asserted-by":"publisher","DOI":"10.1029\/2007JD009021","article-title":"Trends, Seasonal Variability and Dominant NOx Source\nDerived from a Ten Year Record of NO2Measured from Space","volume":"113","author":"van der A","year":"2008","journal-title":"J. Geophys. Res.:Atmos."},{"issue":"12","key":"2026081110190423700_cit6","doi-asserted-by":"publisher","DOI":"10.1007\/s10661-023-12046-3","article-title":"A Quantitative Assessment of Natural\nand Anthropogenic Effects on the Occurrence of High Air Pollution\nLoading in Dhaka and Neighboring Cities and Health Consequences","volume":"195","author":"Khan","year":"2023","journal-title":"Environ. Monit. Assess."},{"key":"2026081110190423700_cit7","doi-asserted-by":"publisher","DOI":"10.1016\/j.rineng.2025.107528","article-title":"Nano-Biocomposite Based\non Zn-Ce-Layered Double Hydroxide and Keliab for Adsorptive Removal\nof Tetracycline from Aqueous Solutions","volume":"28","author":"Ahmadi","year":"2025","journal-title":"Results\nEng."},{"key":"2026081110190423700_cit8","doi-asserted-by":"publisher","DOI":"10.1016\/j.jclepro.2023.136014","article-title":"Feasibility of the\nAdsorption as a Process for Its Large Scale Adoption across Industries\nfor the Treatment of Wastewater: Research Gaps and Economic Assessment","volume":"388","author":"Momina","year":"2023","journal-title":"J. Cleaner Prod."},{"key":"2026081110190423700_cit9","doi-asserted-by":"crossref","unstructured":"Evans, D. G.; Duan, X.\n          Preparation of\nLayered Double Hydroxides and Their Applications as Additives in Polymers,\nas Precursors to Magnetic Materials and in Biology and Medicine\n          Chem. Commun.\n          2006, pp 485\u201349610.1039\/b510313b.","DOI":"10.1039\/B510313B"},{"issue":"2","key":"2026081110190423700_cit10","doi-asserted-by":"publisher","first-page":"173","DOI":"10.1016\/0920-5861(91)80068-K","article-title":"Hydrotalcite-type anionic\nclays:\nPreparation, properties and applications","volume":"11","author":"Cavani","year":"1991","journal-title":"Catal.\nToday"},{"key":"2026081110190423700_cit11","doi-asserted-by":"publisher","first-page":"21","DOI":"10.1016\/j.proche.2015.12.115","article-title":"Synthesis and Characterization\nof Hydrotalcite at Different Mg\/Al Molar Ratios","volume":"17","author":"Wiyantoko","year":"2015","journal-title":"Procedia Chem."},{"issue":"8","key":"2026081110190423700_cit12","doi-asserted-by":"publisher","first-page":"3063","DOI":"10.1016\/j.ceramint.2011.05.034","article-title":"Hydrotalcite\nSynthesis via Co-Precipitation Reactions Using MgO and Al(OH)3 Precursors","volume":"37","author":"Saloma\u0303o","year":"2011","journal-title":"Ceram. Int."},{"issue":"38","key":"2026081110190423700_cit13","doi-asserted-by":"publisher","first-page":"16838","DOI":"10.1021\/acs.iecr.0c02800","article-title":"Biotemplated Fabrication\nof 3D Hierarchically Porous MgAl-LDH\/CF\nComposites with Effective Adsorption of Organic Dyes from Wastewater","volume":"59","author":"Sun","year":"2020","journal-title":"Ind. Eng. Chem. Res."},{"key":"2026081110190423700_cit14","doi-asserted-by":"publisher","DOI":"10.1155\/2024\/4155126","article-title":"Enhanced Performance\nof the Composite of FeMgAl-Layered Double Hydroxide and Rice Husk\nBiochar to Adsorb Heavy Metal Ions of Lead and Cadmium in Aqueous\nSolutions","volume":"2024","author":"Amin","year":"2024","journal-title":"J. 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Innovations"},{"key":"2026081110190423700_cit17","doi-asserted-by":"publisher","DOI":"10.1016\/j.jallcom.2020.154552","article-title":"Biotemplated Fabrication\nof a 3D Hierarchical Structure of Magnetic ZnFe2O4\/MgAl-LDH for Efficient\nElimination of Dye from Water","volume":"829","author":"Sun","year":"2020","journal-title":"J. Alloys Compd."},{"key":"2026081110190423700_cit18","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemosphere.2021.131812","article-title":"Use of LDH- Chromate Adsorption Co-Product as an Air\nPurification Photocatalyst","volume":"286","author":"Nehdi","year":"2022","journal-title":"Chemosphere"},{"issue":"8","key":"2026081110190423700_cit19","doi-asserted-by":"publisher","DOI":"10.3390\/nano12081384","article-title":"Adsorption of Chromate\nIons by Layered Double Hydroxide\u2013Bentonite Nanocomposite for\nGroundwater Remediation","volume":"12","author":"Kim","year":"2022","journal-title":"Nanomaterials"},{"key":"2026081110190423700_cit20","doi-asserted-by":"publisher","DOI":"10.1016\/j.jclepro.2021.127956","article-title":"Ambient NO2\nAdsorption Removal by Mg\u2013Al Layered Double Hydroxides and Derived\nMixed Metal Oxides","volume":"313","author":"Hanif","year":"2021","journal-title":"J. Clean. 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Res."},{"key":"2026081110190423700_cit23","doi-asserted-by":"publisher","first-page":"172","DOI":"10.5004\/dwt.2022.28578","article-title":"Single\/Synchronous\nAdsorption of Cu(II), Cd(II) and Cr(VI) in Water by Layered Double\nHydroxides Doped with Different Divalent Metals","volume":"264","author":"Chen","year":"2022","journal-title":"Desalination Water Treat."},{"issue":"2","key":"2026081110190423700_cit24","doi-asserted-by":"publisher","DOI":"10.3390\/nano10020336","article-title":"Comparative Adsorptive Removal of Phosphate and Nitrate\nfrom Wastewater Using Biochar-MgAl LDH Nanocomposites: Coexisting\nAnions Effect and Mechanistic Studies","volume":"10","author":"Alagha","year":"2020","journal-title":"Nanomaterials"},{"issue":"8","key":"2026081110190423700_cit25","first-page":"106","article-title":"Preparation of Mg\/Al-Layered\nDouble Hydroxide and Its\nApplication in the Synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones Mustapha\nDib et Al","volume":"10","author":"Dib","year":"2018","journal-title":"J. Chem. Pharm. Res."},{"key":"2026081110190423700_cit26","doi-asserted-by":"publisher","first-page":"1809","DOI":"10.1016\/j.matpr.2020.05.059","article-title":"Co-Precipitation\nSynthesis of Mg-Al-CO3layered Double Hydroxides and Its Adsorption\nKinetics with Phosphate(V) Ions","volume":"33","author":"Edan\u0303ol","year":"2020","journal-title":"Mater. Today:\nProc."},{"key":"2026081110190423700_cit27","doi-asserted-by":"publisher","first-page":"37727","DOI":"10.1007\/s11356-021-13162-8","article-title":"Indoor Air Quality Indicators and\nToxicity Potential at the Hospitals\u2019 Environment in Dhaka,\nBangladesh","volume":"28","author":"Uz Zaman","year":"2021","journal-title":"Environ. Sci. Pollut. Res."},{"issue":"2","key":"2026081110190423700_cit28","doi-asserted-by":"publisher","DOI":"10.1088\/2515-7620\/acb90d","article-title":"Impact of\nFine Particulate Matter and Toxic Gases on the Health of\nSchool Children in Dhaka, Bangladesh","volume":"5","author":"Roy","year":"2023","journal-title":"Environ.\nRes. Commun."},{"key":"2026081110190423700_cit29","unstructured":"Shabanian, M.; Hajibeygi, M.; Raeisi, A.\n          FTIR Characterization\nof Layered Double Hydroxides and Modified Layered Double Hydroxides. 202010.1016\/B978-0-08-101903-0.00002-1."},{"key":"2026081110190423700_cit30","doi-asserted-by":"publisher","first-page":"1541","DOI":"10.4028\/www.scientific.net\/msf.514-516.1541","article-title":"Characterization of Chromate-Intercalated Layered Double Hydroxides","volume":"514\u2013516","author":"Del Arco","year":"2006","journal-title":"Mater. Sci. Forum"},{"issue":"2","key":"2026081110190423700_cit31","doi-asserted-by":"publisher","first-page":"292","DOI":"10.1016\/j.jcis.2006.08.064","article-title":"Layered\nDouble Hydroxides as Potential\nChromate Scavengers","volume":"304","author":"Prasanna","year":"2006","journal-title":"J. Colloid Interface Sci."},{"key":"2026081110190423700_cit32","doi-asserted-by":"publisher","DOI":"10.1016\/j.rineng.2022.100686","article-title":"Adsorption of Uranium (VI) Ions by\nLDH Intercalated with L-Methionine in Acidic Water: Kinetics, Thermodynamics\nand Mechanisms","volume":"16","author":"Muhire","year":"2022","journal-title":"Results Eng."},{"issue":"1","key":"2026081110190423700_cit33","doi-asserted-by":"publisher","first-page":"375","DOI":"10.1021\/ic0347790","article-title":"Synthesis and Characterization of New Mg2Al-Paratungstate Layered\nDouble Hydroxides","volume":"43","author":"Del Arco","year":"2004","journal-title":"Inorg. Chem."},{"key":"2026081110190423700_cit34","doi-asserted-by":"publisher","first-page":"102","DOI":"10.1107\/S0021889878012844","article-title":"Seherrer after\nSixty Years: A Survey and Some New Results\nin the Determination of Crystallite Size","volume":"11","author":"Langford","year":"1978","journal-title":"J.\nAppl. Crystallogr."},{"key":"2026081110190423700_cit35","volume-title":"Modern Techniques\nin Applied Molecular Spectroscopy","author":"Mirabella","year":"1998"},{"issue":"Suppl 1","key":"2026081110190423700_cit36","doi-asserted-by":"publisher","first-page":"S141","DOI":"10.1007\/bf03254291","article-title":"Removal of Toxic Hexavalent Chromium\nby Polyaniline Modified Clinoptilolite Nanoparticles","volume":"8","author":"Olad","year":"2011","journal-title":"J. Iran. Chem. Soc."},{"key":"2026081110190423700_cit37","first-page":"13","article-title":"Removal of\nnitrogen oxides from flue gases in a packed column","volume":"37","author":"Kuropka","year":"2011","journal-title":"Environ. Prot. Eng."},{"issue":"22","key":"2026081110190423700_cit38","doi-asserted-by":"publisher","first-page":"3911","DOI":"10.1016\/j.tetlet.2007.03.136","article-title":"A Recyclable Cu\/Al-HT Catalyst for\nAmination of Aryl Chlorides","volume":"48","author":"Likhar","year":"2007","journal-title":"Tetrahedron Lett."}],"container-title":["ACS Omega"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.acs.org\/doi\/pdf\/10.1021\/acsomega.6c02827","content-type":"application\/pdf","content-version":"vor","intended-application":"unspecified"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/11\/31\/46226\/66269418\/acsomega.6c02827.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/11\/31\/46226\/66269418\/acsomega.6c02827.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T15:01:52Z","timestamp":1786460512000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.acs.org\/acsodf\/article\/11\/31\/46226\/5233325\/Synthesis-Characterization-and-Environmental"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,7,26]]},"references-count":38,"journal-issue":{"issue":"31","published-online":{"date-parts":[[2026,7,26]]},"published-print":{"date-parts":[[2026,8,11]]}},"URL":"https:\/\/doi.org\/10.1021\/acsomega.6c02827","relation":{},"ISSN":["2470-1343"],"issn-type":[{"value":"2470-1343","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,7,26]]}}}