A solidification/stabilization process for wastewater treatment sludge from a primary copper smelter
Proces solidifikacije/stabilizacije za tretman otpadnih voda mulja iz primarne topionice bakra
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Wastewater treatment sludge from a primary copper smelter is characterized as hazardous waste that requires treatment prior to disposal due to its significant contents of heavy metals and arsenic. The aim of the presented study was to investigate the feasibility and the effectiveness of a solidification/stabilization process of the sludge using fly ash and lime as binders. The effectiveness of the process was evaluated by Unconfined Compressive Strength (UCS) testing, leaching tests (EN 12457-4 and Toxicity Characteristic Leaching Procedure (TCLP)) and Acid Neutralization Capacity (ANC) tests. All the samples reached the target UCS value of 0.35 MPa. The calcium to silicon concentration ratio (cCa/cSi), determined by X-ray fluorescence analysis, was identified as main factor governing strength development. Inductively coupled plasma-optical emission spectrometry analyses of solutions after leaching tests showed excellent stabilization of Cu, Ni, Pb and Zn (above 99 %) and arsenic (abov...e 90 %) in samples with high Ca(OH)2 content. Results of the ANC test indicated that the buffering capacity of solidified material linearly depended on Ca concentration in FA and lime. Samples with 20 % of binder having 50 % of FA and 50 % of lime met all the requirements for safe disposal.
Mulj koji nastaje tretmanom otpadne vode iz primarne topinice bakra predstavlja opasan otpad koji se mora tretirati pre odlaganja usled visokog sadržaja teških metala i arsena. Cilj prezentovanog rada je ispitivanje izvodljivosti i efikasnosti procesa solidifikacije/stabilizacije ovog mulja korišćenjem letećeg pepela i hidratisanog kreča kao agensa za stabilizaciju. Efikasnost procesa se određivala merenjem pritisne čvrstoće (UCS) solidifikata, testovima luženja (EN 12457-4 i Toxicity Characteristic Leaching Procedure (TCLP)) i testom kapaciteta za neutralizaciju kiseline (ANC test). Svi ispitivani uzorci su imali pritisnu čvrstoću iznad zahtevanih 0,35 MPa. Odnos koncentracija kalcijuma i silicijuma (cCa/cSi) u uzorcima, određen rendgensko-fluorescentnom analizom, je identifikovan kao glavni faktor razvoja pritisne čvrstoće. Optička emisiona spektrometrijska analiza sa indukovano spregnutom plazmom rastvora nakon testova luženja je pokazala odličnu stabilizaciju Cu, Ni, Pb i Zn (iznad... 99 %) i arsena (iznad 90 %) u uzorcima sa visokim sadržajem Ca(OH)2. Rezultati ANC testa ukazuju na to da puferski kapacitet solidifikovanog materijala linearno zavisi od koncentracije Ca u letećem pepelu i kreču. Uzorak sa 20 % veziva sastava 50 % leteći pepeo i 50 % hidratisani kreč ispunjava sve zahtevane uslove da bude bezbedno odložen.
Ključne reči:
fly ash / lime / heavy metals / unconfined compressive strength / leaching testsIzvor:
Journal of the Serbian Chemical Society, 2013, 78, 5, 725-739Izdavač:
- Serbian Chemical Society, Belgrade
Finansiranje / projekti:
- Inovativna sinergija nus-produkata, minimizacije otpada i čistije proizvodnje u metalurgiji (RS-MESTD-Technological Development (TD or TR)-34033)
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Ivšić-Bajčeta, Dragana AU - Kamberović, Željko AU - Korać, Marija AU - Gavrilovski, Milorad PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2363 AB - Wastewater treatment sludge from a primary copper smelter is characterized as hazardous waste that requires treatment prior to disposal due to its significant contents of heavy metals and arsenic. The aim of the presented study was to investigate the feasibility and the effectiveness of a solidification/stabilization process of the sludge using fly ash and lime as binders. The effectiveness of the process was evaluated by Unconfined Compressive Strength (UCS) testing, leaching tests (EN 12457-4 and Toxicity Characteristic Leaching Procedure (TCLP)) and Acid Neutralization Capacity (ANC) tests. All the samples reached the target UCS value of 0.35 MPa. The calcium to silicon concentration ratio (cCa/cSi), determined by X-ray fluorescence analysis, was identified as main factor governing strength development. Inductively coupled plasma-optical emission spectrometry analyses of solutions after leaching tests showed excellent stabilization of Cu, Ni, Pb and Zn (above 99 %) and arsenic (above 90 %) in samples with high Ca(OH)2 content. Results of the ANC test indicated that the buffering capacity of solidified material linearly depended on Ca concentration in FA and lime. Samples with 20 % of binder having 50 % of FA and 50 % of lime met all the requirements for safe disposal. AB - Mulj koji nastaje tretmanom otpadne vode iz primarne topinice bakra predstavlja opasan otpad koji se mora tretirati pre odlaganja usled visokog sadržaja teških metala i arsena. Cilj prezentovanog rada je ispitivanje izvodljivosti i efikasnosti procesa solidifikacije/stabilizacije ovog mulja korišćenjem letećeg pepela i hidratisanog kreča kao agensa za stabilizaciju. Efikasnost procesa se određivala merenjem pritisne čvrstoće (UCS) solidifikata, testovima luženja (EN 12457-4 i Toxicity Characteristic Leaching Procedure (TCLP)) i testom kapaciteta za neutralizaciju kiseline (ANC test). Svi ispitivani uzorci su imali pritisnu čvrstoću iznad zahtevanih 0,35 MPa. Odnos koncentracija kalcijuma i silicijuma (cCa/cSi) u uzorcima, određen rendgensko-fluorescentnom analizom, je identifikovan kao glavni faktor razvoja pritisne čvrstoće. Optička emisiona spektrometrijska analiza sa indukovano spregnutom plazmom rastvora nakon testova luženja je pokazala odličnu stabilizaciju Cu, Ni, Pb i Zn (iznad 99 %) i arsena (iznad 90 %) u uzorcima sa visokim sadržajem Ca(OH)2. Rezultati ANC testa ukazuju na to da puferski kapacitet solidifikovanog materijala linearno zavisi od koncentracije Ca u letećem pepelu i kreču. Uzorak sa 20 % veziva sastava 50 % leteći pepeo i 50 % hidratisani kreč ispunjava sve zahtevane uslove da bude bezbedno odložen. PB - Serbian Chemical Society, Belgrade T2 - Journal of the Serbian Chemical Society T1 - A solidification/stabilization process for wastewater treatment sludge from a primary copper smelter T1 - Proces solidifikacije/stabilizacije za tretman otpadnih voda mulja iz primarne topionice bakra EP - 739 IS - 5 SP - 725 VL - 78 UR - https://hdl.handle.net/21.15107/rcub_technorep_2363 ER -
@article{ author = "Ivšić-Bajčeta, Dragana and Kamberović, Željko and Korać, Marija and Gavrilovski, Milorad", year = "2013", abstract = "Wastewater treatment sludge from a primary copper smelter is characterized as hazardous waste that requires treatment prior to disposal due to its significant contents of heavy metals and arsenic. The aim of the presented study was to investigate the feasibility and the effectiveness of a solidification/stabilization process of the sludge using fly ash and lime as binders. The effectiveness of the process was evaluated by Unconfined Compressive Strength (UCS) testing, leaching tests (EN 12457-4 and Toxicity Characteristic Leaching Procedure (TCLP)) and Acid Neutralization Capacity (ANC) tests. All the samples reached the target UCS value of 0.35 MPa. The calcium to silicon concentration ratio (cCa/cSi), determined by X-ray fluorescence analysis, was identified as main factor governing strength development. Inductively coupled plasma-optical emission spectrometry analyses of solutions after leaching tests showed excellent stabilization of Cu, Ni, Pb and Zn (above 99 %) and arsenic (above 90 %) in samples with high Ca(OH)2 content. Results of the ANC test indicated that the buffering capacity of solidified material linearly depended on Ca concentration in FA and lime. Samples with 20 % of binder having 50 % of FA and 50 % of lime met all the requirements for safe disposal., Mulj koji nastaje tretmanom otpadne vode iz primarne topinice bakra predstavlja opasan otpad koji se mora tretirati pre odlaganja usled visokog sadržaja teških metala i arsena. Cilj prezentovanog rada je ispitivanje izvodljivosti i efikasnosti procesa solidifikacije/stabilizacije ovog mulja korišćenjem letećeg pepela i hidratisanog kreča kao agensa za stabilizaciju. Efikasnost procesa se određivala merenjem pritisne čvrstoće (UCS) solidifikata, testovima luženja (EN 12457-4 i Toxicity Characteristic Leaching Procedure (TCLP)) i testom kapaciteta za neutralizaciju kiseline (ANC test). Svi ispitivani uzorci su imali pritisnu čvrstoću iznad zahtevanih 0,35 MPa. Odnos koncentracija kalcijuma i silicijuma (cCa/cSi) u uzorcima, određen rendgensko-fluorescentnom analizom, je identifikovan kao glavni faktor razvoja pritisne čvrstoće. Optička emisiona spektrometrijska analiza sa indukovano spregnutom plazmom rastvora nakon testova luženja je pokazala odličnu stabilizaciju Cu, Ni, Pb i Zn (iznad 99 %) i arsena (iznad 90 %) u uzorcima sa visokim sadržajem Ca(OH)2. Rezultati ANC testa ukazuju na to da puferski kapacitet solidifikovanog materijala linearno zavisi od koncentracije Ca u letećem pepelu i kreču. Uzorak sa 20 % veziva sastava 50 % leteći pepeo i 50 % hidratisani kreč ispunjava sve zahtevane uslove da bude bezbedno odložen.", publisher = "Serbian Chemical Society, Belgrade", journal = "Journal of the Serbian Chemical Society", title = "A solidification/stabilization process for wastewater treatment sludge from a primary copper smelter, Proces solidifikacije/stabilizacije za tretman otpadnih voda mulja iz primarne topionice bakra", pages = "739-725", number = "5", volume = "78", url = "https://hdl.handle.net/21.15107/rcub_technorep_2363" }
Ivšić-Bajčeta, D., Kamberović, Ž., Korać, M.,& Gavrilovski, M.. (2013). A solidification/stabilization process for wastewater treatment sludge from a primary copper smelter. in Journal of the Serbian Chemical Society Serbian Chemical Society, Belgrade., 78(5), 725-739. https://hdl.handle.net/21.15107/rcub_technorep_2363
Ivšić-Bajčeta D, Kamberović Ž, Korać M, Gavrilovski M. A solidification/stabilization process for wastewater treatment sludge from a primary copper smelter. in Journal of the Serbian Chemical Society. 2013;78(5):725-739. https://hdl.handle.net/21.15107/rcub_technorep_2363 .
Ivšić-Bajčeta, Dragana, Kamberović, Željko, Korać, Marija, Gavrilovski, Milorad, "A solidification/stabilization process for wastewater treatment sludge from a primary copper smelter" in Journal of the Serbian Chemical Society, 78, no. 5 (2013):725-739, https://hdl.handle.net/21.15107/rcub_technorep_2363 .