Synthesis, Characterization, and Synergistic Effects of Modified Biochar in Combination with α-Fe 2 O 3 NPs on Biogas Production from Red Algae Pterocladia capillacea

Mohamed A. Hassaan, Ahmed El Nemr, Marwa R. Elkatory, Safaa Ragab, Mohamed A. El-Nemr and Antonio Pantaleo
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Mohamed A. Hassaan: Marine Pollution Lab, National Institute of Oceanography and Fisheries (NIOF), Alexandria 21556, Egypt
Ahmed El Nemr: Marine Pollution Lab, National Institute of Oceanography and Fisheries (NIOF), Alexandria 21556, Egypt
Marwa R. Elkatory: Advanced Technology and New Materials Research Institute, City for Scientific Research and Technological Applications, Alexandria 21934, Egypt
Safaa Ragab: Marine Pollution Lab, National Institute of Oceanography and Fisheries (NIOF), Alexandria 21556, Egypt
Mohamed A. El-Nemr: Department of Chemical Engineering, Faculty of Engineering, Minia University, Minia 61519, Egypt
Antonio Pantaleo: Department of Agriculture and Environmental Sciences, Bari University, 70121 Bari, Italy

Sustainability, 2021, vol. 13, issue 16, 1-22

Abstract: This study is the first work that evaluated the effectiveness of unmodified (SD) and modified biochar with ammonium hydroxide (SD-NH 2 ) derived from sawdust waste biomass as an additive for biogas production from red algae Pterocladia capillacea either individually or in combination with hematite α-Fe 2 O 3 NPs. Brunauer, Emmett, and Teller, Fourier transform infrared, thermal gravimetric analysis, X-ray diffraction, transmission electron microscopy, Raman, and a particle size analyzer were used to characterize the generated biochars and the synthesized α-Fe 2 O 3 . Fourier transform infrared (FTIR) measurements confirmed the formation of amino groups on the modified biochar surface. The kinetic research demonstrated that both the modified Gompertz and logistic function models fit the experimental data satisfactorily except for 150 SD-NH 2 alone or in combination with α-Fe 2 O 3 at a concentration of 10 mg/L. The data suggested that adding unmodified biochar at doses of 50 and 100 mg significantly increased biogas yield compared to untreated algae. The maximum biogas generation (219 mL/g VS) was obtained when 100 mg of unmodified biochar was mixed with 10 mg of α-Fe 2 O 3 in the inoculum.

Keywords: Pterocladia capillacea; biochar; sawdust; modified sawdust; α-Fe 2 O 3 NPs; biogas (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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