Ash-to-emission pollution controls on co-combustion of textile dyeing sludge and waste tea
Yükleniyor...
Dosyalar
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elseiver
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Given the globally increased waste stream of textile dyeing sludge (TDS), its co-combustion with agricultural residues appears as an environmentally and economically viable solution in a circular economy. This study aimed to quantify the migrations and chemical speciations of heavy metals in the bottom ashes and gas emissions of the co-combustion of TDS and waste tea (WT). The addition of WT increased the fixation rate of As from 66.70 to 83.33% and promoted the chemical speciation of As and Cd from the acid extractable state to the residue one. With the temperature rise to 1000 degrees C, the fixation rates of As, Cd, and Pb in the bottom ashes fell to 27.73, 8.38, and 15.40%, respectively. The chemical speciation perniciousness of Zn, Cu, Ni, Mn, Cr, Cd, and Pb declined with the increased temperature. The ash composition changed with the new appearances of NaAlSi3O8, CaFe2O4, NaFe(SO4)(2), and MgCrO4 at 1000 degrees C. The addition of WT increased CO2 and NOx but decreased SO2 emissions in the range of 680-1000 degrees C. ANN-based joint optimization indicated that the co-combustion emitted SO2 slightly less than did the TDS combustion. These results contribute to a better understanding of ash-to-emission pollution control for the co-combustion of TDS and WT. (C) 2021 Elsevier B.V. All rights reserved.
Açıklama
This work was financially supported by the National Natural Science Foundation of China (No. 51978175 and 22006015), the Science and Technology Program of Yunfu, Guangdong (No. 2020040401), the Scientific and Technological Planning Project of Guangzhou, China (No. 202103000004).
Anahtar Kelimeler
Heavy-Metals, Sewage-Sludge, Transformation Behavior, Sedum Plumbizincicola, Thermal-Treatment, Pickling Sludge
Kaynak
Science of the Total Environment
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
794
Sayı
Künye
Cai, H., Liu, J., Kuo, J., Xie, W., Evrendilek, F., & Zhang, G. (2021). Ash-to-emission pollution controls on co-combustion of textile dyeing sludge and waste tea. Science of The Total Environment, 794, 148667.
