Application of immobilized lentinus edodes stipe in heavy metal lead pollution
A technology of shiitake mushroom stipe and heavy metals, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of high operating costs and raw material costs, high technical requirements and operating costs, and high operating costs. Problems such as high cost, to achieve the effect of wide use, avoiding secondary pollution, and good stability
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Embodiment 1
[0036] Laboratory test:
[0037] Preparation of the biological components of the adsorption material: cut off and wash the non-edible part of the stipe of the mature fruiting body of the mushroom attached to the culture medium, dry it in a constant temperature drying oven at 50±2°C to constant weight, take it out and cool it, and crush it with a pulverizer Finally, as the biological component of the adsorption material, put it into a jar and set aside.
[0038] Pb 2+ Preparation of adsorbent: Use polyvinyl alcohol-sodium alginate (PVA-SA) to fix the stipe of Lentinus edodes as an adsorbent, weigh 5 g PVA and 1 g SA, pour them into a beaker with 100 mL of distilled water, heat and stir to dissolve, Cool to 50°C, add 8 g of shiitake mushroom powder to make the bacterial powder concentration 3% (w / v), mix well to form a mycoalgal alcohol mixture. Using a syringe fitted with a 7-9 gauge needle, squeeze the bacteriophyll mixture into a 2% CaCl 2 Saturated H 3 BO 3 In the sol...
Embodiment 2
[0070] In sewage containing heavy metal lead, Pb in sewage was measured 2+ The concentration was 60 mg / L, and polyvinyl alcohol-sodium alginate (PVA-SA) was used to immobilize the mushroom stipe as the adsorbent 40 g to prepare a fixed-bed reactor. The fixed-bed reactor was a cylinder with a column length of 20 cm. The diameter is 5.1 cm, and the bed height is 80 mm. The fixed bed reactor is used to adsorb the heavy metal lead in the sewage. The speed of the sewage passing through the fixed bed reactor is 10 mL / min, and the heavy metal lead in the wastewater is removed. 2+ The adsorption capacity is 2.21 mg / kg, and the Pb in the sewage after adsorption 2+ The concentration reaches the emission standard required by the state.
[0071] Then, 0.01 mol / L HCl is used to analyze the adsorbed heavy metals. After the fixed mushroom stipe is resolved in the treated sewage, the sewage containing heavy metal lead can be adsorbed again.
Embodiment 3
[0073] In sewage containing heavy metal lead, Pb in sewage was measured 2+ The concentration is 45 mg / L, using polyvinyl alcohol-sodium alginate (PVA-SA) to immobilize the mushroom stipe as the adsorbent 35 g to prepare a fixed-bed reactor, the fixed-bed reactor is a cylinder with a column length of 20 cm, The diameter is 5.1 cm, and the bed height is 80 mm. The fixed bed reactor is used to adsorb the heavy metal lead in the sewage. The speed of the sewage passing through the fixed bed reactor is 10 mL / min, and the heavy metal lead in the wastewater is removed. 2+ The adsorption capacity is 1.87 mg / kg, and the Pb in the sewage after adsorption 2+ The concentration reaches the emission standard required by the state.
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