title: Adsorption of hydrogen sulfide by biochars derived from pyrolysis of different agricultural/forestry wastes.
abstract: The characteristics and mechanisms of hydrogen sulfide (H₂S) adsorption on three different biochars derived from agricultural/forestry wastes through pyrolysis at various temperatures (100 to 500 ºC) were investigated. In this study, the H₂S breakthrough capacity was measured using a laboratory-characterized using pH and Fourier transform infrared spectroscopy analysis. The results obtained demonstrate that all biochars were effective in H2S sorption. The sorption capacity of the biochar for H₂S removal is related to the pyrolysis temperature and pH of the surface. Certain threshold ranges of the pyrolysis temperature (from 100 to 500 ºC) and pH of the surface are presented. It also concluded that the sorption capacity (for removing H₂S) of rice hull-derived biochar is the largest in three biochars (camphor-derived biochar, rice hull-derived biochar, and bamboo-derived biochar). These observations will be helpful in designing biochar as engineered sorbents for the removal of H₂S.
  
  
  CONCLUSIONS
  This paper focuses on the adsorption of hydrogen sulfide (H₂S) by biochars derived from wastes. The characteristics and mechanisms of hydrogen sulfide (H₂S) adsorption on three different boichars derived from agricultural/forestry wastes through pyrolysis at various temperatures were investigated. In this study, the H₂S breakthrough capacity was measured using laboratory characterization with pH and Fourier-transform infrared spectroscopy analysis. The results obtained demonstrate that all biochars were effective in H₂S sorption. The sorption capacity of the biochar for H₂S removal is related to the pyrolysis temperature and pH of the surface.
authors.affiliation: a Department of Environment and Resource , School of Agriculture and Biology, Shanghai Jiao Tong University , Shanghai , People's Republic of China.
authors.forename: Guofeng
authors.initials: G
authors.lastname: Shang
authors.affiliation: b Hunan Environmental Monitoring Center, Changsha , Hunan Changsha , Hunan , People's Republic of China.
authors.forename: Qiwu
authors.initials: Q
authors.lastname: Li
authors.affiliation: a Department of Environment and Resource , School of Agriculture and Biology, Shanghai Jiao Tong University , Shanghai , People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Liu
authors.affiliation: a Department of Environment and Resource , School of Agriculture and Biology, Shanghai Jiao Tong University , Shanghai , People's Republic of China.
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
authors.affiliation: c Xiaoshan District of Hangzhou Environmental Protection Bureau , Hangzhou , Zhejiang , People's Republic of China.
authors.forename: Xiamei
authors.initials: X
authors.lastname: Huang
mesh_terms: D000327:Adsorption; D000383:Agriculture; D000393:Air Pollutants / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry*; D016468:Forestry; D006862:Hydrogen Sulfide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017745:Incineration; D007220:Industrial Waste; D012037:Refuse Disposal / Q000379:methods*
chemical_list: D000393:Air Pollutants; D007220:Industrial Waste; C540010:biochar; D002606:Charcoal; D006862:Hydrogen Sulfide