Scholarlink

<p>Soil liners are barrier systems in engineered landfills that prevent contaminants in leachate from infiltrating into surrounding soil and groundwater systems. This study investigates lateritic soil amended with Granulated Blast Furnace Slag (GBFS) as a reactive barrier in landfills. GBFS, an industrial by-product of ferrous industries, was mixed with laterite soil at varying proportions (5%, 7.5%, 10%, 12.5%, 15%, and 20% by dry weight). Compaction characteristics, saturated hydraulic conductivity, and unconfined compressive strength were determined through laboratory tests. Results showed that hydraulic conductivity decreased from 1.3 × 10⁻⁵ m/s for natural laterite to 8.29 × 10⁻¹⁰ m/s for the 20% GBFS blend, meeting the liner requirement (k ≤ 10⁻⁹ m/s). The unconfined compressive strength at 48&#xa0;h of curing exceeded 200&#xa0;kPa, satisfying minimum liner strength criteria, and increased to 483&#xa0;kPa at 28 days due to pozzolanic reactions. An acceptable zone of moisture content (17-18.8%) and dry density was identified where the 20% GBFS-laterite blend simultaneously satisfied both hydraulic and strength requirements. Batch adsorption tests demonstrated superior ammonia retention for GBFS-amended laterite compared to natural laterite, with Linear and Freundlich isotherms providing excellent fit (R² &gt; 0.98). The study confirms that laterite soil amended with 20% GBFS is a viable reactive barrier material for landfill liner applications, providing both effective hydraulic containment and contaminant attenuation capabilities.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Removal of Ammonia Using Slag-Based Soil Liner in Municipal Solid Waste Landfills

  • 期刊论文

  • 发表日期：

    2026年4月2日

查看全文
  • K. A. Lekshmipriya,
  • Kunal Pravin Bhansali,
  • C. M. Aswathy,
  • Yad Ram Meena,
  • B. M. Sunil

摘要

Soil liners are barrier systems in engineered landfills that prevent contaminants in leachate from infiltrating into surrounding soil and groundwater systems. This study investigates lateritic soil amended with Granulated Blast Furnace Slag (GBFS) as a reactive barrier in landfills. GBFS, an industrial by-product of ferrous industries, was mixed with laterite soil at varying proportions (5%, 7.5%, 10%, 12.5%, 15%, and 20% by dry weight). Compaction characteristics, saturated hydraulic conductivity, and unconfined compressive strength were determined through laboratory tests. Results showed that hydraulic conductivity decreased from 1.3 × 10⁻⁵ m/s for natural laterite to 8.29 × 10⁻¹⁰ m/s for the 20% GBFS blend, meeting the liner requirement (k ≤ 10⁻⁹ m/s). The unconfined compressive strength at 48 h of curing exceeded 200 kPa, satisfying minimum liner strength criteria, and increased to 483 kPa at 28 days due to pozzolanic reactions. An acceptable zone of moisture content (17-18.8%) and dry density was identified where the 20% GBFS-laterite blend simultaneously satisfied both hydraulic and strength requirements. Batch adsorption tests demonstrated superior ammonia retention for GBFS-amended laterite compared to natural laterite, with Linear and Freundlich isotherms providing excellent fit (R² > 0.98). The study confirms that laterite soil amended with 20% GBFS is a viable reactive barrier material for landfill liner applications, providing both effective hydraulic containment and contaminant attenuation capabilities.