Method for adjusting temperature in leaching and repairing heavy metal of waste compost
A technology of heavy metals and eluents, applied in botany equipment and methods, machinery for lifting soil, gardening, etc., can solve problems such as adverse environmental effects
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Embodiment 1
[0048] (1) Material preparation
[0049] 1) Compost and fine sand: screen out soil and sand with a particle size of 60 mesh; remove impurities and large pieces from the soil, screen out uniform fine soil, wash the sand with tap water and then wash it twice with distilled water, and finally use (w / w) 1% HNO 3 The solution was soaked for 24 hours, and then the compost and fine sand were dried in an oven at 60°C; the rinsing column was a PVC pipe with an inner diameter of 3.5 cm and a length of 25 cm; the gauze was washed and dried, and cut into suitable sizes with scissors The circle is tied to one end of the washing column;
[0050] 2) Weigh 20 g of fine sand and put it into the bottom of the leaching column, then weigh 100 g of soil and put it evenly into the rinsing column, and finally weigh 20 g of compost and evenly sprinkle it on the soil; use the same method to install 12 rinsing Columns (0.2 mm nylon mesh is fixed at the bottom of all PVC pipes to support the soil and ...
Embodiment 2
[0055] (1) Material preparation
[0056] 1) Compost and fine sand: Screen out the soil and sand with a particle size of 40 mesh; remove impurities and large pieces from the soil, screen out uniform fine soil, wash the sand with tap water and then wash it twice with distilled water, and finally use (w / w) 1% HNO 3 The solution was soaked for 24 hours, and then the compost and fine sand were dried in an oven at 60°C; the rinsing column was a PVC pipe with an inner diameter of 3.5 cm and a length of 25 cm; the gauze was washed and dried, and cut into suitable sizes with scissors The circle is tied to one end of the washing column;
[0057] 2) Weigh 20 g of fine sand and put it into the bottom of the leaching column, then weigh 100 g of soil and put it evenly into the rinsing column, and finally weigh 20 g of compost and evenly sprinkle it on the soil; use the same method to install 12 rinsing Columns (0.2 mm nylon mesh is fixed at the bottom of all PVC pipes to support the soil ...
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Abstract
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