Development of a Unique Technology for the Pyrolysis of Rice Husk Biochar for Promising Heavy Metal Remediation

Ilia Lobzenko, Marina Burachevskaya, Inna Zamulina, Anatoly Barakhov, Tatiana Bauer, Saglara Mandzhieva, Svetlana Sushkova, Tatiana Minkina, Andrey Tereschenko, Valery Kalinichenko, Oleg Khroniuk and Vishnu D. Rajput ()
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Ilia Lobzenko: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Marina Burachevskaya: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Inna Zamulina: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Anatoly Barakhov: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Tatiana Bauer: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Saglara Mandzhieva: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Svetlana Sushkova: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Tatiana Minkina: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Andrey Tereschenko: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Valery Kalinichenko: Institute of Fertility of Soils of South Russia, 346493 Persianovka, Russia
Oleg Khroniuk: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia
Vishnu D. Rajput: Academy of Biology and Biotechnology named after D.I. Ivanovsky, Southern Federal University, 344006 Rostov-on-Don, Russia

Agriculture, 2022, vol. 12, issue 10, 1-11

Abstract: Due to anthropogenic activities, potentially toxic elements cause severe soil pollution worldwide. Therefore, remediation of contaminated soils is exigent and imperative. One cost-effective and environmentally friendly remediation approach is the application of biochar, which is a solid carbonaceous material. Biochar degrades slowly in soil and can persist there for thousands of years, according to various estimations. In addition, coal obtained from crop wastes has a developed porous structure, a high specific surface area, and does not contain toxic compounds such as heavy metals and polycyclic aromatic hydrocarbons. Biochar with optimal values for specific surface area and porosity was obtained from rice husk by stepwise pyrolysis. The pyrolysis parameters such as the heating rate (11 °C∙min −1 ), temperature (700 °C), and holding time (45 min) were established. At the same time, the surface area of the biochar increased by almost three times with a change in the pyrolysis conditions. As a part of this research, the efficacy of adsorption of Cu(II) from Haplic Chernozem using biochar made from rice husk was examined. The Langmuir and Freundlich models were employed to describe the adsorption data. The isotherm data of heavy metals was better fitted to the Langmuir adsorption model. The addition of rice husk biochar to the soil presented greater removal efficiencies of Cu(II) than soil in pure form. The analysis of the structural characteristics of the sorbent suggest that this material may work efficiently for the restoration of contaminated soil.

Keywords: rice husk; stepwise pyrolysis; sorption characteristics; degree of aromaticity; biochar (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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