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选择和评估土壤质量指标的框架,用于废物填埋场的可持续土壤管理
Yue Li1, Hongbao Zhao1, Jiashun Liu2
1School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China.
Scientific reports
|April 11, 2024
概括
这项研究为回收的矿山废弃物填埋场开发了土壤质量指数 (SQI),发现恢复和未回收区域之间存在显著差异,尽管整体土壤质量仍然适度. 关键的限制因素包括有机物,总,pH值和水分含量.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生态生态学 生态生态学
背景情况:
- 来自露天煤矿的回收废物填埋场往往表现出土壤质量差,阻碍了植被恢复.
- 制定有效的土壤质量指数 (SQI) 对于评估和改善这些退化环境至关重要.
研究的目的:
- 开发和应用土壤质量指数 (SQI),以评估Hequ开放式煤矿废弃物填埋场的植被恢复期间的土壤质量变化.
- 确定主要的土壤指标,限制再生和未再生废物倾倒区的土壤质量.
主要方法:
- 使用土壤管理评估框架开发了一个SQI评估模型.
- 利用主要成分分析 (PCA) 和最低数据集 (MDS) 标准值从九个物理化学指标中进行选择.
- 采用非线性会员函数和改进的Nemerow指数进行全面的土壤质量评估.
主要成果:
- 在回收和未回收地区之间观察到土壤质量 (SQ) 的显著差异,整体SQ是中等的.
- 有机物是总数据集 (TDS) 中最重要的指标,而有机物和总 (TN) 在MDS中具有同等权重.
- 确定的具体限制因素是pH,可用的 (AN),可用的 (AP),表面含水量 (SMC) 和总垃圾填埋场的散装密度 (BD),以及未回收地区的TP和TN.
结论:
- 开发的SQI有效地揭示了植被恢复期间土壤质量的变化.
- 该研究强调了垃圾填埋场的整体土壤质量中等,并确定了针对性回收策略的关键指标.
- 这些发现为制定对退化矿山废弃物倾倒场有效的土壤回收计划提供了基础.
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