| Title | Chromium and energy recovery from tannery wastewater treatment waste: Investigation of major mechanisms in the framework of circular economy |
|---|---|
| ID_Doc | 5897 |
| Authors | Kokkinos, E; Proskynitopoulou, V; Zouboulis, A |
| Title | Chromium and energy recovery from tannery wastewater treatment waste: Investigation of major mechanisms in the framework of circular economy |
| Year | 2019 |
| Published | Journal Of Environmental Chemical Engineering, 7, 5 |
| Abstract | Tannery sludge, produced during the treatment of tanning effluents, is considered as hazardous waste, since it contains significant amounts of leachable Cr(III) and organic matter, according to the respective legislation. Following the EU general environmental protection guidelines, both chromium and energy recovery are strongly recommended, by applying the principles of circular economy and for improving sustainability. Therefore, this research aims to investigate the relevant major mechanisms during the respective resources' recovery process. In the present study, a limited heating value of dried sludge was measured, namely 2 MJ/Kg, which however can be considered as sufficient to be recovered, when using the appropriate incinerator. After combustion, 50% weight loss was found, while almost half of the initial Cr(III) content was oxidized to Cr(VI). Furthermore, by applying a relatively simple hydrometallurgical leaching procedure to the corresponding ash by-product (by the addition of 1 N H2SO4 solution), rather limited leaching efficiency was found (57%), despite the presence of extremely soluble Cr(VI); this was attributed to the sparkly soluble Cr2O3 formation. Instead, since the chromium initially dominant form was Cr(OH)(3) (i.e. soluble in acidic media), up to 93% of Cr(III) content was leached. Additionally, the higher efficiency of H2SO4 as leaching agent, among the different examined acids, was accompanied with an increase in selectivity towards the other co-existing major components (mainly Ca). |
Similar Articles
| ID | Score | Article |
|---|---|---|
10677
|
Kokkinos, E; Zouboulis, A Hydrometallurgical Recovery of Cr(III) from Tannery Waste: Optimization and Selectivity Investigation(2020)Water, 12, 3 | |
| 27863
|
Kowalik-Klimczak, A; Lozynska, M; Zycki, M; Schadewell, C; Fiehn, T; Wozniak, B; Flisek, M Valorisation of Tannery Waste to Recover Chromium with a View to Reusing It in Industrial Practise(2024)Membranes, 14.0, 6 | |
| 28326
|
Hossain, MA; Sultana, R; Moktadir, MA; Hossain, MA A novel bio-adsorbent development from tannery solid waste derived biodegradable keratin for the removal of hazardous chromium: A cleaner and circular economy approach(2023) | |
| 15836
|
Moktadir, MA; Ren, JZ; Zhou, JZ A systematic review on tannery sludge to energy route: Current practices, impacts, strategies, and future directions(2023) | |
| 13261
|
Sgarlata, C; Leonelli, C; Lancellotti, I; Mortalo, C; Berrettoni, M; Fattobene, M; Zamponi, S; Giorgetti, M Sustainable Chromium Encapsulation: Alkali Activation Route(2022) | |
| 30037
|
Staszak, K; Kruszelnicka, I; Ginter-Kramarczyk, D; Góra, W; Baraniak, M; Lota, G; Regel-Rosocka, M Advances in the Removal of Cr(III) from Spent Industrial Effluents-A Review(2023)Materials, 16.0, 1 | |
| 21710
|
Kowalik-Klimczak, A; Zycki, M; Lozynska, M; Schadewell, C; Fiehn, T; Wozniak, B; Flisek, M Application of an Integrated System of Thermal Pressure Hydrolysis/Membrane Techniques to Recover Chromium from Tannery Waste for Reuse in Hide Tanning Processes(2023)Membranes, 13.0, 1 | |
| 15310
|
Velusamy, M; Chakali, B; Ganesan, S; Tinwala, F; Venkatachalam, SS Investigation on pyrolysis and incineration of chrome-tanned solid waste from tanneries for effective treatment and disposal: an experimental study(2020)Environmental Science And Pollution Research, 27, 24 | |
| 9200
|
Sayago, UFC; Ballesteros, VAB The Design of a Process for Adsorbing and Eluting Chromium (VI) Using Fixed-Bed Columns of E. crassipes with Sodium Tripolyphosphate (TPP)(2024)Water, 16.0, 7 | |
| 13456
|
Mikula, K; Konieczka, M; Taf, R; Skrzypczak, D; Izydorczyk, G; Moustakas, K; Kulazynski, M; Chojnacka, K; Witek-Krowiak, A Tannery waste as a renewable source of nitrogen for production of multicomponent fertilizers with biostimulating properties(2023)Environmental Science And Pollution Research, 30, 4 |