Efficiency, by-product valorization, and pollution control of co-pyrolysis of textile dyeing sludge and waste solid adsorbents: Their atmosphere, temperature, and blend ratio dependencies
Yükleniyor...
Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elseiver
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study aimed to quantify the co-pyrolytic synergistic effects of textile dyeing sludge (TDS) and waste biochar (WBC) for an optimal utilization of secondary resources and to mitigate environmental pollution and waste volume. TDS and WBC had a strong synergistic effect between 800 and 900 degrees C in the CO2-assisted atmosphere. With the increased TDS fraction, NH3 emission fell significantly regardless of the atmosphere type. The CO2 atmosphere changed Sin TDS char and released SO2 in the range of 800-1000 degrees C. With the temperature rise, an unstable N structure turned into a more stable heterocyclic N structure in the CO2 and N-2 atmospheres. Regardless of the atmosphere type and temperature, the C-containing functional groups in co-pyrolytic biochar existed mainly as C-C/C-H. In the CO2 atmosphere, inorganic S, aliphatic S, and thiophene S in the co-pyrolytic biochar disappeared and became more stable sulfones. The co-pyrolysis inhibited the formation of S-containing compounds. The retention ability of the copyrolytic biochar peaked for most of the heavy metals in the N-2 atmosphere but was better for Pb and Zn in the CO2 than N-2 atmosphere. Simultaneous optimization showed the co-pyrolysis of 10% TDS and 90% WBC at above 950 degrees C in the N-2-CO2 or CO2 atmosphere as the optimal operational settings combined.
Açıklama
This work was financially supported by the National Natural Science Foundation of China (No. 51978175 and 22006015), the Scientific and Technological Planning Project of Guangzhou, China (No. 202103000004), and the Science and Technology Planning Project of Yunfu, Guangdong Province, China (No. 2020040401).
Anahtar Kelimeler
Textile Dyeing Sludge, Waste Biochar, Co-Pyrolysis, Bio-Oils, Joint Optimization
Kaynak
Science of the Total Environment
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
819
Sayı
Künye
Zou, H., Huang, S., Ren, M., Liu, J., Evrendilek, F., Xie, W., & Zhang, G. (2022). Efficiency, by-product valorization, and pollution control of co-pyrolysis of textile dyeing sludge and waste solid adsorbents: Their atmosphere, temperature, and blend ratio dependencies. Science of The Total Environment, 819, 152923.
