Biosolids as a long-term solution for soil development on mine tailings

生物固体作为尾矿土壤开发的长期解决方案

• 批准号: 479480-2015
• 负责人: Pypker, Thomas
• 金额: $ 1.75万
• 依托单位: Thompson Rivers University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=580094
• 关键词: Biosolids; long; term; solution; soil

In most regions in Canada, mine sites must be reclaimed after the mining has ceased. Biosolids from municipal waste treatment plants have been shown to assist in site restoration by improving soil biophysical properties. However, the use of biosolids is controversial with the Canadian public because of concern regarding the leaching of heavy metals from the biosolids into the restored ecosystem. For example, there have been recent protests by residents within the Nicola Valley, British Columbia, regarding the application of biosolids near Merritt, BC. Therefore, mine companies, such as Teck Highland Valley Partnership (HVC), require information on the short and long-term impacts of biosolids on mine reclamation sites. With this information the company can make informed decisions on the effectiveness and safety of biosolids in restoring disturbed sites. In 1998, two study sites were established at the HVC mine on reclaimed tailings areas. The objective was to assess the impacts of different levels of biosolids application on soil physical and chemical properties and on plant growth and chemistry. Past research on these sites reported that 2 years after biosolids application the availability of essential plant nutrients were improved, biosolids were more effective than fertilizers at improving soil quality and carbon sequestration, concentrations of Mo were elevated in plant tissues and changes in soil hydrology were inconclusive. The initial study only reported on the short term impacts, but it is essential that the longer term changes in soil and plant nutrients, heavy metal concentrations, carbon content and hydrology be quantified. These study sites still remain but there is a possibility that new mining in this area may result in these plots being destroyed. Therefore, if the mining industry is to be more informed on the long-term impacts of biosolids, we must measure the long-term impacts on physical soil properties and plant tissue immediately. The objective of this study is to assess the impact of biosolids on soil and plant characteristics 17 years after the application of biosolids to a mine reclamation site.

在加拿大的大多数地区，开采停止后必须回收矿场。来自 已显示市政废物处理厂可以通过改善土壤生物物理来帮助现场恢复 特性。但是，由于担心，生物固体的使用与加拿大公众有争议 关于将重金属从生物固体浸出到恢复的生态系统中。例如，有 不列颠哥伦比亚省尼古拉山谷的居民最近抗议有关应用的 不列颠哥伦比亚省梅里特附近的生物固体。因此，矿公司（例如Teck Highland Valley Partnership（HVC））， 需要有关生物固体对矿山填海场的短期和长期影响的信息。与此 公司可以就生物固体恢复的有效性和安全做出明智的决定 干扰地点。 1998年，在回收尾矿区域在HVC矿山建立了两个研究地点。目的是 评估不同水平的生物固体应用对土壤物理和化学特性的影响 植物生长和化学。过去对这些地点的研究报告说，生物固体施用后的两年 改善了必需植物营养的可用性，生物固体比肥料更有效 改善土壤质量和碳固醇，MO的浓度在植物组织和 土壤水文的变化尚无定论。最初的研究仅报告了短期影响，但这是 必须长期变化土壤和植物养分，重金属浓度，碳含量 和水文学。这些研究地点仍然存在，但有可能在该领域进行新开采 可能会导致这些阴谋被摧毁。因此，如果采矿业更加了解 生物固体的长期影响，我们必须衡量对物理土壤特性和植物的长期影响 立即组织。这项研究的目的是评估生物固体对土壤和植物的影响 在将生物固体应用于矿山填海地点后的17年。