인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Abstract Nitrogen leaching from agricultural soils serves as a main contributor to water pollution and nitrogen losses, posing significant challenges to sustainable agricultural practices. However, existing mitigation strategies often exhibit limited efficiency in reducing nitrate nitrogen (NO 3 − –N) losses and enhancing ammonium nitrogen (NH 4 + –N) retention under varying environmental conditions. To address this, our research investigated the effectiveness of biochar-supported nanoscale zero-valent iron (nZVI@BC) composites. The combination of nZVI with biochar is driven by the need to enhance biochar's adsorption capacity and provide an additional mechanism for nitrate reduction via the strong reductive properties of nZVI. Our findings indicated that nZVI@BC significantly enhanced nitrate reduction and ammonium retention compared to biochar alone, with the nZVI@BC0.6 achieving the best overall performance. The NO 3 − –N concentration in leachate was reduced by up to 71.31%, while NH 4 + –N retention increased by 53.12%, with notable improvements in nitrogen retention even in deeper soil layers. The adsorption kinetics revealed that nZVI@BC composites exhibited both rapid initial adsorption and sustained chemical reduction of NO 3 − –N, with the pseudo-second-order model verifying the dominance of chemical adsorption for nZVI-enriched treatments. The nitrate nitrogen reduction potential of nZVI@BC at various pH levels revealed optimum performance at low pH. Structural analyses (XRD, FTIR, and XPS) showed that nZVI incorporation altered the chemical environment of biochar, enhancing its surface reactivity and functional group availability, which improved nitrogen immobilization efficiency. This study highlights the potential of nZVI@BC composites, particularly nZVI@BC0.6, as an effective and sustainable strategy for mitigating nitrogen leaching, improving nitrogen use efficiency, and addressing agricultural non-point source pollution. Graphical Abstract
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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