Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching

Jingjing Qiu; Huijie Hou; Sha Liang; Liang Yang; Quan Gan; Shuangyi Tao; Wenbo Yu; Ruibin Lv; Lian Ding; Keke Xiao; Jingping Hu; Bingchuan Liu; Jiakuan Yang

doi:10.1016/j.resconrec.2021.105953

Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching

Jingjing Qiu, Huijie Hou, Sha Liang^*, Liang Yang, Quan Gan, Shuangyi Tao, Wenbo Yu, Ruibin Lv, Lian Ding, Keke Xiao, Jingping Hu, Bingchuan Liu, Jiakuan Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

In this study, preparation of hierarchically porous biochar (PB) and simultaneous nutrient recovery from sewage sludge were realized through three steps of KHCO₃-activated pyrolysis, water leaching and acid leaching. The prepared PB samples were applied as adsorbents for the removal of 4-chlorophenol (4-CP) from aqueous solutions. Effect of pyrolysis temperature on the physicochemical properties of PB samples was investigated. The PB prepared at 900 °C (PB-900) had the highest surface area (1476.0 m²/g) and total pore volume (1.138 cm³/g). The formation mechanism of porous structure of PB-900 was revealed by investigating the phase transformation, element distribution and pore structure evolution during its whole preparation process. PB-900 showed a high 4-CP adsorption rate of 14.4 mg/(g∙min), and its maximum adsorption capacity for 4-CP was up to 192.4 mg/g. The mechanism of 4-CP removal by PB-900 was mainly physical adsorption, and its strong aromaticity strengthened its interaction with 4-CP through π-π bonding. The water leaching solution in the preparation process of PB-900 contained a lot of nutrient elements (K, Si, P), which was recovered for grass seeds germination. Compared with the samples cultured with ultrapure water only, the seed germination rate of samples cultured with ultrapure water added with 20% of pretreated water leaching solution increased from 63% to 80%, and the average shoot length of grass grown for 7 days increased by 51.4%. The findings of this study suggest that KHCO₃ is an alternative activator to prepare hierarchically porous biochar adsorbent from sewage sludge and realize simultaneous nutrient recovery.

Original language	English
Article number	105953
Journal	Resources, Conservation and Recycling
Volume	176
DOIs	https://doi.org/10.1016/j.resconrec.2021.105953
State	Published - Jan 2022
Externally published	Yes

Keywords

4-chlorophenol
Adsorption performance
Hierarchically porous biochar
KHCO activation
Nutrient recovery
Sludge pyrolysis

Access to Document

10.1016/j.resconrec.2021.105953

Cite this

Qiu, J., Hou, H., Liang, S., Yang, L., Gan, Q., Tao, S., Yu, W., Lv, R., Ding, L., Xiao, K., Hu, J., Liu, B., & Yang, J. (2022). Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching. Resources, Conservation and Recycling, 176, Article 105953. https://doi.org/10.1016/j.resconrec.2021.105953

@article{bcdb67ab90b94cd4b3e299b92101777c,

title = "Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching",

abstract = "In this study, preparation of hierarchically porous biochar (PB) and simultaneous nutrient recovery from sewage sludge were realized through three steps of KHCO3-activated pyrolysis, water leaching and acid leaching. The prepared PB samples were applied as adsorbents for the removal of 4-chlorophenol (4-CP) from aqueous solutions. Effect of pyrolysis temperature on the physicochemical properties of PB samples was investigated. The PB prepared at 900 °C (PB-900) had the highest surface area (1476.0 m2/g) and total pore volume (1.138 cm3/g). The formation mechanism of porous structure of PB-900 was revealed by investigating the phase transformation, element distribution and pore structure evolution during its whole preparation process. PB-900 showed a high 4-CP adsorption rate of 14.4 mg/(g∙min), and its maximum adsorption capacity for 4-CP was up to 192.4 mg/g. The mechanism of 4-CP removal by PB-900 was mainly physical adsorption, and its strong aromaticity strengthened its interaction with 4-CP through π-π bonding. The water leaching solution in the preparation process of PB-900 contained a lot of nutrient elements (K, Si, P), which was recovered for grass seeds germination. Compared with the samples cultured with ultrapure water only, the seed germination rate of samples cultured with ultrapure water added with 20% of pretreated water leaching solution increased from 63% to 80%, and the average shoot length of grass grown for 7 days increased by 51.4%. The findings of this study suggest that KHCO3 is an alternative activator to prepare hierarchically porous biochar adsorbent from sewage sludge and realize simultaneous nutrient recovery.",

keywords = "4-chlorophenol, Adsorption performance, Hierarchically porous biochar, KHCO activation, Nutrient recovery, Sludge pyrolysis",

author = "Jingjing Qiu and Huijie Hou and Sha Liang and Liang Yang and Quan Gan and Shuangyi Tao and Wenbo Yu and Ruibin Lv and Lian Ding and Keke Xiao and Jingping Hu and Bingchuan Liu and Jiakuan Yang",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = jan,

doi = "10.1016/j.resconrec.2021.105953",

language = "英语",

volume = "176",

journal = "Resources, Conservation and Recycling",

issn = "0921-3449",

publisher = "Elsevier",

}

Qiu, J, Hou, H, Liang, S, Yang, L, Gan, Q, Tao, S, Yu, W, Lv, R, Ding, L, Xiao, K, Hu, J, Liu, B & Yang, J 2022, 'Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching', Resources, Conservation and Recycling, vol. 176, 105953. https://doi.org/10.1016/j.resconrec.2021.105953

TY - JOUR

T1 - Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching

AU - Qiu, Jingjing

AU - Hou, Huijie

AU - Liang, Sha

AU - Yang, Liang

AU - Gan, Quan

AU - Tao, Shuangyi

AU - Yu, Wenbo

AU - Lv, Ruibin

AU - Ding, Lian

AU - Xiao, Keke

AU - Hu, Jingping

AU - Liu, Bingchuan

AU - Yang, Jiakuan

PY - 2022/1

Y1 - 2022/1

N2 - In this study, preparation of hierarchically porous biochar (PB) and simultaneous nutrient recovery from sewage sludge were realized through three steps of KHCO3-activated pyrolysis, water leaching and acid leaching. The prepared PB samples were applied as adsorbents for the removal of 4-chlorophenol (4-CP) from aqueous solutions. Effect of pyrolysis temperature on the physicochemical properties of PB samples was investigated. The PB prepared at 900 °C (PB-900) had the highest surface area (1476.0 m2/g) and total pore volume (1.138 cm3/g). The formation mechanism of porous structure of PB-900 was revealed by investigating the phase transformation, element distribution and pore structure evolution during its whole preparation process. PB-900 showed a high 4-CP adsorption rate of 14.4 mg/(g∙min), and its maximum adsorption capacity for 4-CP was up to 192.4 mg/g. The mechanism of 4-CP removal by PB-900 was mainly physical adsorption, and its strong aromaticity strengthened its interaction with 4-CP through π-π bonding. The water leaching solution in the preparation process of PB-900 contained a lot of nutrient elements (K, Si, P), which was recovered for grass seeds germination. Compared with the samples cultured with ultrapure water only, the seed germination rate of samples cultured with ultrapure water added with 20% of pretreated water leaching solution increased from 63% to 80%, and the average shoot length of grass grown for 7 days increased by 51.4%. The findings of this study suggest that KHCO3 is an alternative activator to prepare hierarchically porous biochar adsorbent from sewage sludge and realize simultaneous nutrient recovery.

AB - In this study, preparation of hierarchically porous biochar (PB) and simultaneous nutrient recovery from sewage sludge were realized through three steps of KHCO3-activated pyrolysis, water leaching and acid leaching. The prepared PB samples were applied as adsorbents for the removal of 4-chlorophenol (4-CP) from aqueous solutions. Effect of pyrolysis temperature on the physicochemical properties of PB samples was investigated. The PB prepared at 900 °C (PB-900) had the highest surface area (1476.0 m2/g) and total pore volume (1.138 cm3/g). The formation mechanism of porous structure of PB-900 was revealed by investigating the phase transformation, element distribution and pore structure evolution during its whole preparation process. PB-900 showed a high 4-CP adsorption rate of 14.4 mg/(g∙min), and its maximum adsorption capacity for 4-CP was up to 192.4 mg/g. The mechanism of 4-CP removal by PB-900 was mainly physical adsorption, and its strong aromaticity strengthened its interaction with 4-CP through π-π bonding. The water leaching solution in the preparation process of PB-900 contained a lot of nutrient elements (K, Si, P), which was recovered for grass seeds germination. Compared with the samples cultured with ultrapure water only, the seed germination rate of samples cultured with ultrapure water added with 20% of pretreated water leaching solution increased from 63% to 80%, and the average shoot length of grass grown for 7 days increased by 51.4%. The findings of this study suggest that KHCO3 is an alternative activator to prepare hierarchically porous biochar adsorbent from sewage sludge and realize simultaneous nutrient recovery.

KW - 4-chlorophenol

KW - Adsorption performance

KW - Hierarchically porous biochar

KW - KHCO activation

KW - Nutrient recovery

KW - Sludge pyrolysis

UR - http://www.scopus.com/inward/record.url?scp=85116246705&partnerID=8YFLogxK

U2 - 10.1016/j.resconrec.2021.105953

DO - 10.1016/j.resconrec.2021.105953

M3 - 文章

AN - SCOPUS:85116246705

SN - 0921-3449

VL - 176

JO - Resources, Conservation and Recycling

JF - Resources, Conservation and Recycling

M1 - 105953

ER -

Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this