{"id":"https://openalex.org/W7203772835","doi":"https://doi.org/10.21926/aeer.2603027","title":"Dynamic Removal of Hexavalent Chromium from Aqueous Solution and Realwastewater Using Raw Cordia africana Sawdust in a Fixed-Bed Column System","display_name":"Dynamic Removal of Hexavalent Chromium from Aqueous Solution and Realwastewater Using Raw Cordia africana Sawdust in a Fixed-Bed Column System","publication_year":2026,"publication_date":"2026-08-19","ids":{"openalex":"https://openalex.org/W7203772835","doi":"https://doi.org/10.21926/aeer.2603027"},"language":"en","primary_location":{"id":"doi:10.21926/aeer.2603027","doi":"https://doi.org/10.21926/aeer.2603027","is_oa":true,"landing_page_url":"https://doi.org/10.21926/aeer.2603027","pdf_url":"https://www.lidsen.com/journals/aeer/aeer-07-03-027/aeer.2603027.pdf","source":{"id":"https://openalex.org/S4210186825","display_name":"Advances in Environmental and Engineering Research","issn_l":"2766-6190","issn":["2766-6190"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","vabb-shw"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Advances in Environmental and Engineering Research","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"hybrid","oa_url":"https://www.lidsen.com/journals/aeer/aeer-07-03-027/aeer.2603027.pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5134496444","display_name":"Aster Woldu Gebrearegay","orcid":"https://orcid.org/0009-0008-0859-257X","observed_orcids":["https://orcid.org/0009-0008-0859-257X"]},"institutions":[{"id":"https://openalex.org/I865572129","display_name":"Adama Science and Technology University","ror":"https://ror.org/02ccba128","country_code":"ET","type":"education","lineage":["https://openalex.org/I865572129"]}],"countries":["ET"],"is_corresponding":false,"raw_author_name":"Aster Woldu Gebrearegay","raw_affiliation_strings":["Adama Science and Technology University in Chemical Engineering Department , Adama , Ethiopia;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Adama Science and Technology University in Chemical Engineering Department , Adama , Ethiopia;","institution_ids":["https://openalex.org/I865572129"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112721539","display_name":"Melakuu Tesfaye","orcid":"https://orcid.org/0009-0005-4569-4549","observed_orcids":["https://orcid.org/0009-0005-4569-4549"]},"institutions":[{"id":"https://openalex.org/I865572129","display_name":"Adama Science and Technology University","ror":"https://ror.org/02ccba128","country_code":"ET","type":"education","lineage":["https://openalex.org/I865572129"]}],"countries":["ET"],"is_corresponding":true,"raw_author_name":"Melakuu Tesfaye","raw_affiliation_strings":["Adama Science and Technology University in Chemical Engineering Department , Adama , Ethiopia;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Adama Science and Technology University in Chemical Engineering Department , Adama , Ethiopia;","institution_ids":["https://openalex.org/I865572129"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5058892563","display_name":"Alemu Gizaw","orcid":"https://orcid.org/0000-0002-0033-1948","observed_orcids":["https://orcid.org/0000-0002-0033-1948"]},"institutions":[{"id":"https://openalex.org/I865572129","display_name":"Adama Science and Technology University","ror":"https://ror.org/02ccba128","country_code":"ET","type":"education","lineage":["https://openalex.org/I865572129"]}],"countries":["ET"],"is_corresponding":false,"raw_author_name":"Alemu Gizaw","raw_affiliation_strings":["Adama Science and Technology University in Chemical Engineering Department , Adama , Ethiopia;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Adama Science and Technology University in Chemical Engineering Department , Adama , Ethiopia;","institution_ids":["https://openalex.org/I865572129"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5112721539"],"corresponding_institution_ids":["https://openalex.org/I865572129"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"07","issue":"03","first_page":"1","last_page":"28"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10016","display_name":"Adsorption and biosorption for pollutant removal","score":0.9779999852180481,"subfield":{"id":"https://openalex.org/subfields/2312","display_name":"Water Science and Technology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10016","display_name":"Adsorption and biosorption for pollutant removal","score":0.9779999852180481,"subfield":{"id":"https://openalex.org/subfields/2312","display_name":"Water Science and Technology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11972","display_name":"Chromium effects and bioremediation","score":0.017000000923871994,"subfield":{"id":"https://openalex.org/subfields/2307","display_name":"Health, Toxicology and Mutagenesis"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12078","display_name":"Environmental remediation with nanomaterials","score":0.003100000089034438,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/hexavalent-chromium-removal","display_name":"hexavalent chromium removal","score":0.9760000109672546},{"id":"https://openalex.org/keywords/cr-vi-adsorption","display_name":"Cr(VI) adsorption","score":0.8769999742507935},{"id":"https://openalex.org/keywords/fixed-bed-column","display_name":"fixed-bed column","score":0.7839999794960022},{"id":"https://openalex.org/keywords/tannery-wastewater","display_name":"tannery wastewater","score":0.9419999718666077},{"id":"https://openalex.org/keywords/breakthrough-curves","display_name":"breakthrough curves","score":0.7860000133514404},{"id":"https://openalex.org/keywords/thomas-model","display_name":"Thomas model","score":0.9229999780654907},{"id":"https://openalex.org/keywords/yoon-nelson-model","display_name":"Yoon-Nelson model","score":0.9980000257492065},{"id":"https://openalex.org/keywords/bdst-model","display_name":"BDST model","score":0.9290000200271606},{"id":"https://openalex.org/keywords/adsorbent-regeneration","display_name":"adsorbent regeneration","score":0.9240000247955322},{"id":"https://openalex.org/keywords/chromium-speciation","display_name":"chromium speciation","score":0.8090000152587891},{"id":"https://openalex.org/keywords/biomass-derived-adsorbents","display_name":"biomass-derived adsorbents","score":0.7080000042915344},{"id":"https://openalex.org/keywords/hydraulic-loading","display_name":"hydraulic loading rate","score":0.6119999885559082},{"id":"https://openalex.org/keywords/heavy-metal-removal","display_name":"heavy metal removal","score":0.5680000185966492}],"concepts":[{"id":"https://openalex.org/C2781468121","wikidata":"https://www.wikidata.org/wiki/Q2660666","display_name":"Hexavalent chromium","level":3,"score":0.7098000049591064},{"id":"https://openalex.org/C511782168","wikidata":"https://www.wikidata.org/wiki/Q725","display_name":"Chromium","level":2,"score":0.6883999705314636},{"id":"https://openalex.org/C150394285","wikidata":"https://www.wikidata.org/wiki/Q180254","display_name":"Adsorption","level":2,"score":0.6169999837875366},{"id":"https://openalex.org/C94061648","wikidata":"https://www.wikidata.org/wiki/Q336191","display_name":"Wastewater","level":2,"score":0.6075000166893005},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.5674999952316284},{"id":"https://openalex.org/C172120300","wikidata":"https://www.wikidata.org/wiki/Q1134348","display_name":"Volumetric flow rate","level":2,"score":0.5228000283241272},{"id":"https://openalex.org/C184651966","wikidata":"https://www.wikidata.org/wiki/Q906356","display_name":"Aqueous solution","level":2,"score":0.5113000273704529},{"id":"https://openalex.org/C2780308376","wikidata":"https://www.wikidata.org/wiki/Q816713","display_name":"Sawdust","level":2,"score":0.4950999915599823},{"id":"https://openalex.org/C528095902","wikidata":"https://www.wikidata.org/wiki/Q2283886","display_name":"Pulp and paper industry","level":1,"score":0.4742000102996826},{"id":"https://openalex.org/C9930424","wikidata":"https://www.wikidata.org/wiki/Q7426587","display_name":"Saturation (graph theory)","level":2,"score":0.4602999985218048},{"id":"https://openalex.org/C2780551164","wikidata":"https://www.wikidata.org/wiki/Q2306599","display_name":"Column (typography)","level":3,"score":0.3562000095844269},{"id":"https://openalex.org/C58445606","wikidata":"https://www.wikidata.org/wiki/Q898533","display_name":"Sorption","level":3,"score":0.35580000281333923},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.34290000796318054},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.3188999891281128},{"id":"https://openalex.org/C84250820","wikidata":"https://www.wikidata.org/wiki/Q3030793","display_name":"Hydraulic retention time","level":3,"score":0.3174999952316284},{"id":"https://openalex.org/C206139338","wikidata":"https://www.wikidata.org/wiki/Q192355","display_name":"Raw material","level":2,"score":0.28369998931884766},{"id":"https://openalex.org/C2779525144","wikidata":"https://www.wikidata.org/wiki/Q36506863","display_name":"Breakthrough curve","level":3,"score":0.28369998931884766},{"id":"https://openalex.org/C2777777548","wikidata":"https://www.wikidata.org/wiki/Q206040","display_name":"Mercury (programming language)","level":2,"score":0.2768999934196472},{"id":"https://openalex.org/C2776812703","wikidata":"https://www.wikidata.org/wiki/Q4915288","display_name":"Biosorption","level":4,"score":0.27559998631477356},{"id":"https://openalex.org/C113196181","wikidata":"https://www.wikidata.org/wiki/Q485223","display_name":"Analytical Chemistry (journal)","level":2,"score":0.25429999828338623},{"id":"https://openalex.org/C57442070","wikidata":"https://www.wikidata.org/wiki/Q221275","display_name":"Sewage treatment","level":2,"score":0.2540999948978424},{"id":"https://openalex.org/C107872376","wikidata":"https://www.wikidata.org/wiki/Q321355","display_name":"Environmental chemistry","level":1,"score":0.2540999948978424},{"id":"https://openalex.org/C87717796","wikidata":"https://www.wikidata.org/wiki/Q146326","display_name":"Environmental engineering","level":1,"score":0.25130000710487366}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.21926/aeer.2603027","doi":"https://doi.org/10.21926/aeer.2603027","is_oa":true,"landing_page_url":"https://doi.org/10.21926/aeer.2603027","pdf_url":"https://www.lidsen.com/journals/aeer/aeer-07-03-027/aeer.2603027.pdf","source":{"id":"https://openalex.org/S4210186825","display_name":"Advances in Environmental and Engineering Research","issn_l":"2766-6190","issn":["2766-6190"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","vabb-shw"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Advances in Environmental and Engineering Research","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.21926/aeer.2603027","doi":"https://doi.org/10.21926/aeer.2603027","is_oa":true,"landing_page_url":"https://doi.org/10.21926/aeer.2603027","pdf_url":"https://www.lidsen.com/journals/aeer/aeer-07-03-027/aeer.2603027.pdf","source":{"id":"https://openalex.org/S4210186825","display_name":"Advances in Environmental and Engineering Research","issn_l":"2766-6190","issn":["2766-6190"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","vabb-shw"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Advances in Environmental and Engineering Research","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Clean water and sanitation","score":1.0,"id":"https://metadata.un.org/sdg/6"},{"display_name":"Responsible consumption and production","score":1.0,"id":"https://metadata.un.org/sdg/12"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7203772835.pdf","grobid_xml":"https://content.openalex.org/works/W7203772835.grobid-xml"},"referenced_works_count":74,"referenced_works":["https://openalex.org/W1964603081","https://openalex.org/W1967031296","https://openalex.org/W1970618820","https://openalex.org/W1970825073","https://openalex.org/W1972202821","https://openalex.org/W1975865293","https://openalex.org/W1980962512","https://openalex.org/W1984953206","https://openalex.org/W1986428061","https://openalex.org/W1991680730","https://openalex.org/W1992800952","https://openalex.org/W1993457707","https://openalex.org/W1996537213","https://openalex.org/W1997960703","https://openalex.org/W2000948847","https://openalex.org/W2001490107","https://openalex.org/W2005817863","https://openalex.org/W2006234174","https://openalex.org/W2012111950","https://openalex.org/W2015238925","https://openalex.org/W2016334396","https://openalex.org/W2017339901","https://openalex.org/W2023818956","https://openalex.org/W2025734265","https://openalex.org/W2028287026","https://openalex.org/W2031468577","https://openalex.org/W2046624127","https://openalex.org/W2052988335","https://openalex.org/W2053471413","https://openalex.org/W2060726941","https://openalex.org/W2066935756","https://openalex.org/W2069089224","https://openalex.org/W2069249712","https://openalex.org/W2074157166","https://openalex.org/W2079654126","https://openalex.org/W2083152804","https://openalex.org/W2085991639","https://openalex.org/W2090351339","https://openalex.org/W2092334424","https://openalex.org/W2096138525","https://openalex.org/W2097544281","https://openalex.org/W2099418728","https://openalex.org/W2112017750","https://openalex.org/W2122768602","https://openalex.org/W2125672123","https://openalex.org/W2130469967","https://openalex.org/W2141229048","https://openalex.org/W2144219650","https://openalex.org/W2154447506","https://openalex.org/W2156338877","https://openalex.org/W2157483155","https://openalex.org/W2163529355","https://openalex.org/W2169845549","https://openalex.org/W2331172766","https://openalex.org/W2340965300","https://openalex.org/W2462717241","https://openalex.org/W2748341844","https://openalex.org/W2749455767","https://openalex.org/W2800445121","https://openalex.org/W2803228444","https://openalex.org/W2807254627","https://openalex.org/W2897017041","https://openalex.org/W2920913336","https://openalex.org/W2998318765","https://openalex.org/W3186990399","https://openalex.org/W4200256377","https://openalex.org/W4212967599","https://openalex.org/W4213073152","https://openalex.org/W4306687002","https://openalex.org/W4405934384","https://openalex.org/W4406107492","https://openalex.org/W4407565683","https://openalex.org/W4411243954","https://openalex.org/W4411786710"],"related_works":["https://openalex.org/W7172127482","https://openalex.org/W7155504156","https://openalex.org/W2907547068","https://openalex.org/W2910732018","https://openalex.org/W2802886146","https://openalex.org/W2012111950","https://openalex.org/W7130703505","https://openalex.org/W3170241618","https://openalex.org/W2739743895","https://openalex.org/W101412105"],"abstract_inverted_index":{"This":[0,33,373],"study":[1,437],"evaluated":[2],"the":[3,35,100,203,240,251,327,375],"dynamic":[4,205,379],"performance":[5],"of":[6,66,74,253,311,320,342,430],"raw":[7,383],"Cordia":[8,384],"africana":[9,385],"sawdust":[10,386],"for":[11,52,284,367],"hexavalent":[12],"chromium":[13,322,405],"(Cr(VI))":[14],"removal":[15,381],"in":[16,97,104,370,434],"a":[17,435],"fixed-bed":[18,40],"column":[19,59,181,221],"system":[20],"under":[21],"varying":[22],"operating":[23],"conditions,":[24],"using":[25,83,114,134,144,382,390],"both":[26],"synthetic":[27,84],"solutions":[28],"and":[29,49,69,77,80,89,117,138,146,174,223,263,270,356,418],"real":[30,42,90,237,391],"tannery":[31,91,238,392],"wastewater.":[32,92],"represents":[34],"first":[36,376],"comprehensive":[37,121,139,395],"investigation":[38],"combining":[39],"operation,":[41],"wastewater":[43,140],"validation,":[44],"triple-model":[45],"comparison,":[46],"speciation":[47,151,307,406],"analysis,":[48],"regeneration":[50,413],"assessment":[51,407],"this":[53,439],"locally":[54],"abundant":[55],"Ethiopian":[56,425],"biomass.":[57],"Fixed-bed":[58],"experiments":[60,94],"were":[61,95,112,129],"conducted":[62,130,154],"at":[63,214,227],"flow":[64,170,194],"rates":[65],"5,":[67],"8,":[68],"10":[70,198,215],"mL/min,":[71],"bed":[72,176,304],"depths":[73],"6,":[75],"9,":[76],"12":[78],"cm,":[79],"pH":[81],"5.5":[82],"Cr(VI)":[85,157,312,380],"solution":[86],"(47":[87],"mg/L)":[88],"All":[93],"performed":[96,143],"duplicate,":[98],"with":[99,120,161,184,303,317,335,398,408],"optimal":[101],"condition":[102],"repeated":[103],"triplicate":[105],"to":[106,155,190,199,313],"establish":[107],"measurement":[108],"variability.":[109],"Breakthrough":[110],"curves":[111,226],"analyzed":[113],"Thomas,":[115],"Yoon-Nelson,":[116],"BDST":[118,287],"models":[119,272],"error":[122,399],"metrics":[123],"(RMSE,":[124,401],"MAE,":[125,402],"AIC).":[126],"Regeneration":[127,334],"studies":[128],"over":[131,415],"three":[132,346],"cycles":[133],"0.1":[135,336],"M":[136,337],"HCl,":[137],"characterization":[141],"was":[142,153,212],"ICP-OES":[145],"standard":[147],"physicochemical":[148],"methods.":[149],"Chromium":[150,306],"analysis":[152,400,421],"assess":[156],"reduction":[158,310],"during":[159,315],"adsorption,":[160,316],"complete":[162,409],"mass":[163,410],"balance":[164,331],"closure":[165],"(99.2":[166],"\u00b1":[167,209,244],"1.5%).":[168],"Lower":[169],"rate":[171,195],"(5":[172],"mL/min)":[173],"greater":[175],"depth":[177],"(12":[178],"cm)":[179],"improved":[180],"service":[182],"time,":[183],"breakthrough":[185,225,275],"time":[186],"increasing":[187],"from":[188,197,441],"36.0":[189],"50.0":[191],"min":[192],"as":[193,324],"decreased":[196],"5":[200],"mL/min.":[201],"However,":[202],"highest":[204],"adsorption":[206,300],"capacity":[207,344],"(1.78":[208],"0.06":[210],"mg/g)":[211],"observed":[213],"mL/min":[216],"(Run":[217],"9),":[218],"reflecting":[219],"faster":[220],"saturation":[222],"steeper":[224],"higher":[228],"hydraulic":[229],"loading,":[230],"rather":[231],"than":[232],"superior":[233],"adsorbent":[234,241,329],"performance.":[235],"For":[236],"wastewater,":[239,393],"achieved":[242],"1.51":[243],"0.28":[245],"mg/g\u2014representing":[246],"approximately":[247,318,340],"85%":[248],"retention":[249],"despite":[250],"presence":[252],"competing":[254],"ions":[255],"(Cu2+,":[256],"Zn2+,":[257],"Fe3+),":[258],"high":[259],"TDS":[260],"(3500.97":[261],"mg/L),":[262],"elevated":[264],"COD":[265],"(812.00":[266],"mg/L).":[267],"The":[268,348,428],"Thomas":[269],"Yoon-Nelson":[271],"accurately":[273],"predicted":[274],"behavior":[276],"(R2":[277],">":[278],"0.98;":[279],"RMSE":[280],"<":[281],"1.84":[282],"mg/L":[283],"all":[285,431],"conditions).":[286],"model":[288],"parameters":[289],"(N0":[290],"=":[291,295],"1252-2132":[292],"mg/L;":[293],"ka":[294],"0.00936-0.00089":[296],"L/mg\u00b7min)":[297],"confirmed":[298],"decreasing":[299],"driving":[301],"force":[302],"saturation.":[305],"revealed":[308],"partial":[309],"Cr(III)":[314,325],"28%":[319],"adsorbed":[321],"present":[323],"on":[326,378,423],"spent":[328],"(mass":[330],"closure:":[332],"99.2%).":[333],"HCl":[338],"maintained":[339],"76%":[341],"initial":[343],"after":[345],"cycles.":[347],"adsorbent\u2019s":[349],"low":[350],"cost":[351],"($0.10-0.15":[352],"USD/kg),":[353],"natural":[354],"abundance,":[355],"simple":[357],"preparation":[358],"requiring":[359],"no":[360],"chemical":[361],"modification":[362],"support":[363],"its":[364],"preliminary":[365],"promise":[366],"polishing":[368],"applications":[369],"resource-limited":[371],"settings.":[372],"is":[374],"report":[377],"with:":[387],"(1)":[388],"validation":[389],"(2)":[394],"three-model":[396],"comparison":[397],"AIC),":[403],"(3)":[404],"balance,":[411],"(4)":[412],"evaluation":[414],"multiple":[416],"cycles,":[417],"(5)":[419],"techno-economic":[420],"based":[422],"local":[424],"market":[426],"conditions.":[427],"combination":[429],"five":[432],"elements":[433],"single":[436],"distinguishes":[438],"work":[440],"previous":[442],"lignocellulosic":[443],"biosorbent":[444],"investigations.":[445]},"counts_by_year":[],"updated_date":"2026-10-28T10:33:24.094632","created_date":"2026-08-20T00:00:00"}