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.

在加拿大的大部分地区，采矿停止后必须回收矿区。生物固体来自 城市废物处理厂已被证明有助于通过改善土壤生物物理特性来恢复场地 特性.然而，使用生物固体是有争议的与加拿大公众，因为关注 关于重金属从生物固体中浸出到恢复的生态系统中。例如， 最近，不列颠哥伦比亚省尼古拉山谷的居民抗议， 不列颠哥伦比亚省梅里特附近的生物固体。因此，矿业公司，如泰克高地谷合伙公司（HVC）， 需要关于生物固体对矿山复垦场地的短期和长期影响的资料。与此 信息，该公司可以作出明智的决定，有效性和安全性的生物固体在恢复 不安的网站 1998年，在HVC矿山的回收尾矿区建立了两个研究地点。目的是 评估不同水平的生物固体施用对土壤物理和化学性质的影响， 植物生长和化学。过去对这些地点的研究报告说，生物固体应用后2年， 提高了植物必需营养素的有效性，生物固体比肥料更有效， 改善土壤质量和固碳，提高钼在植物组织中的浓度， 土壤水文的变化没有定论。最初的研究只报告了短期影响，但它是 关键是土壤和植物养分、重金属浓度、碳含量的长期变化 和水文学进行量化。这些研究地点仍然存在，但有可能在这一地区的新采矿 可能会导致这些阴谋被摧毁因此，如果采矿业要更多地了解 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 组织立即本研究旨在评估生物固体对土壤和植物的影响 将生物固体应用于矿山复垦现场17年后的特性。