Attenuation of municipal landfill leachate through land treatment

Abstract

The treatment of municipal landfill’s leachate is considered as one of the most significant environmental issues. In this study a laboratory experiment was conducted through land treatment, achieving an efficient and economical method by using Vetiver plant. Moreover, the effects of land treatment of leachate of municipal landfills on the natural reduction of organic and inorganic contaminants in the leachate after the pre-treatment in the Aradkouh disposal center are invested. Three pilots including the under-investigation region’s soil planted by Vetiver plant, the region’s intact soil pilot and the artificial composition of the region’s soil including the natural region’s soil, sand, and rock stone are used. The leachate, having passed its initial treatment, passed through the soil and to the pilot. It was collected in the end of the pilots and its organic and inorganic contaminants were measured. However, the land treatment of leachate was conducted in a slow rate at various speeds. According to the results, in order to remove COD, BOD5, TDS, TSS, TOC the best result was obtained in the region’s soil planted with Vetiver plant and at the speed of 0.2 ml per minute which resulted 99.1%, 99.7%, 52.4%, 98.8%, 94.9% removal efficiencies, respectively. It also can be concluded that the higher the organic rate load is, the lower the efficiency of the removal would be. In addition, EC & pH were measured and the best result was obtained in the region’s soil planted with Vetiver plant and at the speed of 0.2 ml/min.

Treatment of Lead Contaminated Soil using Solidification/Stabilization Method Incorporated with Sugarcane Bagasse

“…After that, the clay was blended with a precise amount of Pb (NO 3 ) 2 (which was dissolved in water before blending to ensure the homogeneity of soil) to reach a target concentration of 1000 ppm (this concentration was chosen in order to test the worst-case scenario of the contaminated soil) by using the following equation (eq. 1): (1) whereas: m= weight of the solution required (g) C= target concentration of Pb (ppm) ms = specimen final weight (g) n= molecular number Ms= solution molecular weight (g/mol) η= percentage purity chemical (%) Mm= metal atomic weight (g/mol) Cement and Water Ordinary Portland cement type II (CEM II) was used as blender with distilled water.…”

“…The increase of wastes generation is becoming more and more obvious during the latest decades in Malaysia and in all over the world. Researchers have shown that between 40 to 80% of municipal solid waste is disposed of in developed countries whereas this rate reaches 60 to 90% in developing countries [1]. Several companies generate enormous quantities of residual substances that usually loaded by toxic heavy metals such as cadmium (Cd), copper (Cu), chromium (Cr), arsenic (As) and lead (Pb).…”

Extracellular Metabolites from Industrial Microalgae and Their Biotechnological Potential

“…are able to degrade various phenols such as pentachlorophenol, p -nitrophenol, and naphthalenesulphonic acids [82,83]. Though the metabolic degradation pathways are not fully understood, enzymes including phenoloxidase laccase (EC 1.10.3.2) and laccase-like enzymes are involved in the oxidation of aromatic substrates [81,84,85]. These exoenzymes can be potentially applied in the environmental degradation of phenolic pollutants.…”

Activation of Persulfate Using an Industrial Iron-Rich Sludge as an Efficient Nanocatalyst for Landfill Leachate Treatment

“…Fresh leachate was obtained from Aradkouh's landfill located in Tehran, Iran. This landfill accommodates 8000 tons solid waste per day [48]. The features of raw leachate are shown in Table 4.…”