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As a potential adsorbent material, loose, porous livestock manure biochar provides a new approach to livestock manure resource utilization. In this study, coconut husks (CH) and livestock manure, i.e., cow dung (CD), pig manure (PM), and chicken manure (CM) were used as biomass precursors for preparation of biochar via high-temperature pyrolysis and CO2 activation. Characterization technologies, such as scanning electron microscopy, Fourier transform infrared spectroscopy, adsorption–desorption isotherms, and pore size distributions, were used to study the microscopic morphologies and physicochemical properties of unactivated and activated biochar materials. The results showed that CD biochar provides better adsorption performance (up to 29.81 mg H2S/g) than CM or PM biochar. After activation at 650° for 1 h, the best adsorption performance was 38.23 mg H2S/g. For comparison, the CH biochar removal performance was 30.44 mg H2S/g. Its best performance was 38.73 mg H2S/g after 1 h of activation at 750 °C. Its best removal performance is equivalent to that of CH biochar activated at a temperature that is 100 °C higher. Further material characterization indicates that the H2S removal performance of livestock-manure–derived biochar is not entirely dependent on the specific surface area, but is closely related to the pore size distribution.
Lianghu Su; Mei Chen; Guihua Zhuo; Rongting Ji; Saier Wang; Longjiang Zhang; Mingzhu Zhang; Haidong Li. Comparison of Biochar Materials Derived from Coconut Husks and Various Types of Livestock Manure, and Their Potential for Use in Removal of H2S from Biogas. Sustainability 2021, 13, 6262 .
AMA StyleLianghu Su, Mei Chen, Guihua Zhuo, Rongting Ji, Saier Wang, Longjiang Zhang, Mingzhu Zhang, Haidong Li. Comparison of Biochar Materials Derived from Coconut Husks and Various Types of Livestock Manure, and Their Potential for Use in Removal of H2S from Biogas. Sustainability. 2021; 13 (11):6262.
Chicago/Turabian StyleLianghu Su; Mei Chen; Guihua Zhuo; Rongting Ji; Saier Wang; Longjiang Zhang; Mingzhu Zhang; Haidong Li. 2021. "Comparison of Biochar Materials Derived from Coconut Husks and Various Types of Livestock Manure, and Their Potential for Use in Removal of H2S from Biogas." Sustainability 13, no. 11: 6262.
Potential release quantity and quality of dissolved organic matter (DOM) from hydrochar (HDOM) in various environmental conditions were investigated. Corn cobs were utilized as model agricultural residue to prepare the hydrochar. Four extracts, ultra-pure water, acid solution, alkali solution and salt solution, and two temperatures, 20 °C and 60 °C, were adopted to imitate various environmental conditions. Excitation-emission spectrophotometry with parallel factor analysis was used to evaluate the chemical properties of HDOM. The results showed that the dissolved organic carbon in the HDOM was high, ranging from 46 to 268 mg g−1. Four components were confirmed in the HDOM: mixed substances of humic-like and protein-like components, marine humic-like substances, terrestrial humic-like substances and tyrosine-like substances. Alkalinity and high temperature conditions could enhance the leaching amount of HDOM, particularly humic-like substances, and change the relative proportion of components and the chemical quality. In addition, values of the fluorescence indexes indicated that the HDOM was high microbial availability. Released HDOM may result in significant impacts in ecosystem functionality. These findings reveal the potential release characteristics of HDOM in the environment, opening new doors to understanding the environmental impacts of hydrochar and guiding its rational application.
Hu Cheng; Rongting Ji; Shi Yao; Yang Song; Qian Sun; Yongrong Bian; Ziquan Wang; Longjiang Zhang; Xin Jiang; Jiangang Han. Potential release of dissolved organic matter from agricultural residue-derived hydrochar: Insight from excitation emission matrix and parallel factor analysis. Science of The Total Environment 2021, 781, 146712 .
AMA StyleHu Cheng, Rongting Ji, Shi Yao, Yang Song, Qian Sun, Yongrong Bian, Ziquan Wang, Longjiang Zhang, Xin Jiang, Jiangang Han. Potential release of dissolved organic matter from agricultural residue-derived hydrochar: Insight from excitation emission matrix and parallel factor analysis. Science of The Total Environment. 2021; 781 ():146712.
Chicago/Turabian StyleHu Cheng; Rongting Ji; Shi Yao; Yang Song; Qian Sun; Yongrong Bian; Ziquan Wang; Longjiang Zhang; Xin Jiang; Jiangang Han. 2021. "Potential release of dissolved organic matter from agricultural residue-derived hydrochar: Insight from excitation emission matrix and parallel factor analysis." Science of The Total Environment 781, no. : 146712.