Method for controlling different forms of heavy metal in urban life compost by modified nano carbon
A nano-carbon and heavy metal technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problem of not many nano-carbons.
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Embodiment 1
[0079] The method of regulating the different forms of heavy metals in urban life composting by modified nano-carbon is carried out according to the following steps:
[0080] (1) Handling of materials:
[0081] Before the experiment, the garbage compost was pretreated to remove large debris such as plastic films, bricks, stones, and glass. After air-drying, it was passed through a 2 mm sieve for later use; the physical and chemical properties of the garbage compost were: pH 7.62, organic matter content 221.25 g·kg -1 , total nitrogen 13.48 g·kg -1 , available phosphorus 0.078 g·kg -1 , C / N is 8.37, saturated water content is 0.76 mL·g -1 , bulk density 0.85 g·mL -1 ; The contents of heavy metals (Cr, Cu, Pb, Zn) were 67.00, 238.73, 172.11 and 496.38 mg·kg, respectively -1 ;
[0082] The plants are tall fescue ( Festuca arundinacea L . );
[0083] The particle size of nano carbon is 40nm, and the specific surface area is 1.2×10 5 m 2 kg -1 , with a pH value of 7,...
Embodiment 2
[0088] The method of regulating the different forms of heavy metals in urban life composting by modified nano-carbon is carried out according to the following steps:
[0089] (1) Handling of materials:
[0090] Before the experiment, the garbage compost was pretreated to remove large debris such as plastic films, bricks, stones, and glass. After air-drying, it was passed through a 2 mm sieve for later use; the physical and chemical properties of the garbage compost were: pH 7.62, organic matter content 221.25 g·kg -1 , total nitrogen 13.48 g·kg -1 , available phosphorus 0.078 g·kg -1 , C / N is 8.37, saturated water content is 0.76 mL·g -1 , bulk density 0.85 g·mL -1 ; The contents of heavy metals (Cr, Cu, Pb, Zn) were 67.00, 238.73, 172.11 and 496.38 mg·kg, respectively -1 ;
[0091] The plants are tall fescue ( Festuca arundinacea L . );
[0092] The nanocarbon particle size is 50 nm, and the specific surface area is 1.2×10 5 m 2 kg -1 , with a pH value of 7, wh...
Embodiment 3
[0097] The method of regulating the different forms of heavy metals in urban life composting by modified nano-carbon is carried out according to the following steps:
[0098] (1) Handling of materials:
[0099] Before the experiment, the garbage compost was pretreated to remove large debris such as plastic films, bricks, stones, and glass. After air-drying, it was passed through a 2 mm sieve for later use; the physical and chemical properties of the garbage compost were: pH 7.62, organic matter content 221.25 g·kg -1 , total nitrogen 13.48 g·kg -1 , available phosphorus 0.078 g·kg -1 , C / N is 8.37, saturated water content is 0.76 mL·g -1 , bulk density 0.85 g·mL -1 ; The contents of heavy metals (Cr, Cu, Pb, Zn) were 67.00, 238.73, 172.11 and 496.38 mg·kg, respectively -1 ;
[0100] The plants are tall fescue ( Festuca arundinacea L . );
[0101] The nanocarbon particle size is 70 nm, and the specific surface area is 1.2×10 5 m 2 kg -1 , with a pH value of 7, wh...
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