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Biochar Application for Abandoned Mine Land Reclamation

作者

Christopher D. Peltz, Andrew Harley

名稱(期刊/節目)

Agricultural and Environmental Applications of Biochar: Advances and Barriers

期刊期數/節目集數

Volume 63, Pages 325-339

出版單位

Wiley

出版年月日

2015/10/29

原文摘要

This chapter is to communicate the current science and practical application of using biochar to reduce the negative environmental impacts and reclaim the ecological functions of mining‐affected lands, especially abandoned or orphaned mines. The unique challenges associated with rehabilitating mining‐affected lands and how biochar can be used as a tool for mine land remediation is discussed. Key findings from the growing body of literature surrounding the use of biochar for environmental management are reviewed and preliminary data from several field trials of abandoned mine land (AML) reclamation through biochar application are presented. In general, biochar, if applied appropriately, serves as an efficient soil conditioner for reducing sediment erosion, improving water conservation and water quality, and facilitating vegetation establishment at abandoned and active mine sites. To achieve most desirable remediation effects, nutrient‐rich biochars, such as those derived from animal manures, capable of providing immediate and long‐term fertility for supporting plant growth are highlighted. More research embedded with field trials is necessary to develop best biochar amendment practices for AML reclamation. Questions related to biochar material characteristics, performance in field applications, and large‐scale production or commercial availability have to be addressed. The main barrier to practical application of biochar in AML reclamation is the high production cost of the amendment. Providing the cost competitiveness, biochar would substitute for other materials or be at least used in conjunction with traditional soil quality enhancers in AML reclamation. Though many hurdles exist, the widespread use of biochar for mine lands reclamation is envisioned.

原文摘要簡述

本章旨在介紹利用生物炭減少對環境的負面影響並恢復受採礦影響的土地(尤其是廢棄礦山或孤兒礦山)的生態功能的當前科學和實際應用。在此討論了與恢復受採礦影響的土地相關的獨特挑戰,以及如何將生物炭用作礦山土地修復的工具。綜述了越來越多圍繞生物炭對環境管理利用之文獻中的主要發現,並提供了通過生物炭應用進行的多次廢棄礦區(AML)開墾的現場試驗的初步數據。一般而言,生物炭如果使用得當,可作為一種有效的土壤改良劑,以減少沉積物的侵蝕、改善節水和水質,並促進廢棄礦場和活躍礦場的植被建設。為了達到最理想的修復效果,重點強調了能夠提供立即和長期肥力以支持植物生長,富含營養的生物炭,例如來自動物糞便的生物炭。為了發展廢棄礦區開墾的最佳生物炭改良實踐,有必要進行更多的現場試驗研究。必須解決與生物炭材料特性,現場應用性能以及大規模生產或商業供應有關的問題。生物炭在廢棄礦區開墾中實際應用的主要障礙是高生產成本的修改。為提供成本競爭力,生物炭將替代其他材料或至少與傳統的土壤品質改良劑一起用於廢棄礦區開墾。儘管存在許多障礙,但仍可預見生物炭在礦山土地開墾中的廣泛利用。

關鍵字

abandoned mine land reclamation; biochar application; biochar characteristics; ecological functions; environmental management; revegetation; soil quality

連結

https://doi.org/10.2136/sssaspecpub63.2014.0047.5

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