CAJ | 학술논문

生物炭应用在土壤中具有 CO2减排、改善土壤性质等作用，研究表明生物炭土壤有助于农作物产量和质量的提高，同时对污染物有较好的吸附效果，能控制其迁移，但对于近年关注的土壤中 Cr（Ⅵ）和生物炭的作用研究却很少。通过土柱淋滤实验，研究土壤中添加生物炭后对 Cr（Ⅵ）的迁移影响，特别是对其进行模拟酸雨淋滤实验，进一步研究了生物炭土壤对 Cr（Ⅵ）的锁定效果。结果表明：仅施加1％的生物炭，就能够大幅度提高土壤系统固定 Cr（Ⅵ）的能力，小粒径生物炭对 Cr（Ⅵ）的吸附固定能力更加明显，在一定条件下是大粒径的固定吸附量的3倍，在酸雨淋滤作用下也不易解吸，说明生物炭的添加能有效抑制 Cr（Ⅵ）在土壤中的迁移，起到原位锁定的作用，这对农田土壤开发治理提供了重要手段和依据。
생물탄응용재토양중구유 CO2감배、개선토양성질등작용，연구표명생물탄토양유조우농작물산량화질량적제고，동시대오염물유교호적흡부효과，능공제기천이，단대우근년관주적토양중 Cr（Ⅵ）화생물탄적작용연구각흔소。통과토주림려실험，연구토양중첨가생물탄후대 Cr（Ⅵ）적천이영향，특별시대기진행모의산우림려실험，진일보연구료생물탄토양대 Cr（Ⅵ）적쇄정효과。결과표명：부시가1％적생물탄，취능구대폭도제고토양계통고정 Cr（Ⅵ）적능력，소립경생물탄대 Cr（Ⅵ）적흡부고정능력경가명현，재일정조건하시대립경적고정흡부량적3배，재산우림려작용하야불역해흡，설명생물탄적첨가능유효억제 Cr（Ⅵ）재토양중적천이，기도원위쇄정적작용，저대농전토양개발치리제공료중요수단화의거。
Biochar-amended soil is under investigation as an approach to carbon sequestration to produce and improve soil fertility and increase agricultural productivity and quality.Previous studies showed absorptive effects of biochar on heavy metals including Cu,Cd,etc.However,Cr(Ⅵ)has got few attention to study in biochar-amended soil.Herein,soil column leaching experiments are designed for Cr(Ⅵ)migration behaviors in soils before and after adding biochar.In particular,simulated acid rain leaching is for understanding the locking effect of Cr(Ⅵ)in biochar/soil.The results showed that 1% of biochar added in soil can fix much more Cr(Ⅵ).Furthermore,small particles of biochar showed a stronger adsorption capacity and they could lock Cr(Ⅵ)as three times as large particles,while Cr(Ⅵ)was not easy to release again under acid rain leaching.It confirms that biochar effectively mitigate Cr(Ⅵ)migration in soils and it has locking effect on Cr(Ⅵ),which provides an important means and basis for development of farmland soils.