Biochar: Preparation, Modification and Environmental Application

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (20 April 2023) | Viewed by 3389

Special Issue Editor

College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
Interests: biochar; adsorption; wastewater treatment; environmental remediation; soil amendment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are delighted to invite your submissions to the Special Issue on Biochar: Preparation, Modification, and Environmental Application.

Environmental pollution resulting from water eutrophication and heavy metal pollution have become the main problems facing the world. How to effectively control and mitigate these problems has always been the focus of the current environmental research field. Biochar has been widely used in environmental remediation due to its relatively large specific surface area, abundant surface functional groups, and low preparation cost. However, pristine biochar has a relatively limited adsorption capacity for pollutants compared with activated carbon. Therefore, it is necessary to modify the biochar to improve its adsorption capacity. The properties of biochar are different depending on the feedstocks, carbonization conditions, and modification methods, which may affect its adsorption performance and application. Currently, the research on biochar on the adsorption pollutants mainly focuses on its physicochemical characteristics, influencing factors, and adsorption mechanisms. To optimize the preparation conditions of functional biochar, to clarify the adsorption behavior and mechanism of different modified biochars for different pollutants, and to systematically evaluate the problems and environmental risks in its practical application, scientists all over the world must carry out systematic research together. In particular, research on the adsorption and removal mechanism of some emerging contaminants is also highly needed. The solution to these bottleneck problems mentioned above could promote and expand the large-scale and practical application of biochar in the future.

Dr. Bing Wang
Guest Editor

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Keywords

  • biochar
  • modification
  • resource utilization
  • environmental remediation
  • adsorption
  • soil amendment
  • risk assessment
  • heavy metal
  • wastewater treatment

Published Papers (1 paper)

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Research

19 pages, 4401 KiB  
Article
Removal of Phosphate from Aqueous Solution by Zeolite-Biochar Composite: Adsorption Performance and Regulation Mechanism
by Zhaoxia Deng, Shangyi Gu, Hongguang Cheng, Dan Xing, Gratien Twagirayezu, Xi Wang, Wenjing Ning and Mingming Mao
Appl. Sci. 2022, 12(11), 5334; https://doi.org/10.3390/app12115334 - 25 May 2022
Cited by 7 | Viewed by 2689
Abstract
Recently, rampant eutrophication induced by phosphorus enrichment in water has been attracting attention worldwide. However, the mechanisms by which phosphate can be eliminated from the aqueous environment remain unclear. This study was aimed at investigating the adsorption performance and regulation mechanisms of the [...] Read more.
Recently, rampant eutrophication induced by phosphorus enrichment in water has been attracting attention worldwide. However, the mechanisms by which phosphate can be eliminated from the aqueous environment remain unclear. This study was aimed at investigating the adsorption performance and regulation mechanisms of the zeolite-biochar composite for removing phosphate from an aqueous environment. To do this, physicochemical properties of the zeolite-biochar composite were assessed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) specific surface area (SSA) analyzer, and transmission electron microscopy (TEM). Adsorption tests were performed to evaluate the adsorption ability of the composite material for mitigating excess phosphorus in the aqueous environment. The findings evinced that the phosphorus removed by PZC 7:3 (pyrolyzed zeolite and corn straw at a mass ratio of 7:3) can reach 90% of that removed by biochar. The maximum adsorption capacities of zeolite, biochar, and PZC 7:3 were 0.69, 3.60, and 2.41 mg/g, respectively. The main mechanism of phosphate removal by PZC 7:3 was the formation of thin-film amorphous calcium-magnesium phosphate compounds through ligand exchange. This study suggests that PZC 7:3 is a viable adsorbent for the removal of phosphate from aquatic systems. Full article
(This article belongs to the Special Issue Biochar: Preparation, Modification and Environmental Application)
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