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<p>Arid and semi-arid regions suffer from poor water and nutrient retention due to their soil characteristics. This study was aimed at evaluating the effectiveness of biochar (BC), ash and soot-products of biomass-fuelled gasifiers using groundnut shell as the feedstock and <i>Delonix regia</i> stem as the biofuel, produced in both aluminium (Al) and stainless steel (SS) reactors. These products were tested as soil amendments to enhance water-holding capacity (WHC) and water-releasing capacity (WRC). It was observed that the materials’ physicochemical properties varied significantly with reactor type. For instance, soot from aluminium reactor exhibited the highest carbon content (83%), and soot from stainless steel reactor had the highest surface area (309 m<sup>2</sup>/g). Additionally, ash from stainless steel reactor had the highest pH. Biochar from both reactor nearly doubled soil water holding capacity, with WHC values of 29.43% and 29.55% compared to the control’s 16.8%. Biochar, especially from stainless steel reactor, also improved WRC, outperforming ash and soot amendments. WHC strength of the amendments follows the order: BC-SS &gt; BC-Al &gt; Ash-SS &gt; Ash-Al &gt; Soot-Al &gt; Soot-SS &gt; Control, while WRC strength of the amendments follows the order: BC-SS &gt; BC-Al &gt; Ash-SS &gt; Ash-Al &gt; Soot-SS &gt; Soot-Al &gt; Control. The study demonstrates that biochar, ash and soot from biomass gasifiers can significantly enhance soil water holding and releasing capacities in semi-arid regions, potentially improving soil health and agricultural productivity.</p> Graphical abstract <p></p>

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Impact of gasifier-derived soil amendments on soil–water dynamics in semi-arid Nigerian land through a comparative study of reactor materials

  • 期刊论文

  • 发表日期：

    2025年11月18日

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  • OLUWATOYIN RHODA AYANWUSI,
  • KINGSLEY O IWUOZOR,
  • EBUKA CHIZITERE EMENIKE,
  • OMAR H ABD-ELKADER,
  • WONSEBOLATAN SAMUEL OMOLEYE,
  • HAMAD A AL-LOHEDAN,
  • ABDELRAHMAN O EZZAT,
  • IFEOLUWA PETER OYEKUNLE,
  • ADEWALE GEORGE ADENIYI

摘要

Arid and semi-arid regions suffer from poor water and nutrient retention due to their soil characteristics. This study was aimed at evaluating the effectiveness of biochar (BC), ash and soot-products of biomass-fuelled gasifiers using groundnut shell as the feedstock and Delonix regia stem as the biofuel, produced in both aluminium (Al) and stainless steel (SS) reactors. These products were tested as soil amendments to enhance water-holding capacity (WHC) and water-releasing capacity (WRC). It was observed that the materials’ physicochemical properties varied significantly with reactor type. For instance, soot from aluminium reactor exhibited the highest carbon content (83%), and soot from stainless steel reactor had the highest surface area (309 m2/g). Additionally, ash from stainless steel reactor had the highest pH. Biochar from both reactor nearly doubled soil water holding capacity, with WHC values of 29.43% and 29.55% compared to the control’s 16.8%. Biochar, especially from stainless steel reactor, also improved WRC, outperforming ash and soot amendments. WHC strength of the amendments follows the order: BC-SS > BC-Al > Ash-SS > Ash-Al > Soot-Al > Soot-SS > Control, while WRC strength of the amendments follows the order: BC-SS > BC-Al > Ash-SS > Ash-Al > Soot-SS > Soot-Al > Control. The study demonstrates that biochar, ash and soot from biomass gasifiers can significantly enhance soil water holding and releasing capacities in semi-arid regions, potentially improving soil health and agricultural productivity.

Graphical abstract