Soil conditioner for reducing content of heavy metals in soil and preparation method thereof
A soil conditioner and heavy metal technology, applied in soil conditioning materials, chemical instruments and methods, applications, etc., can solve the problem of high absorption rate of heavy metals, and achieve the effect of reducing heavy metal content, clear mechanism of action, and obvious effect.
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[0022] The present invention also provides a kind of preparation method that is used to reduce the soil conditioner of heavy metal content in soil, comprises the following steps:
[0023] Step 1, calcium hydroxide, calcium superphosphate, magnesium sulfate, clinolite are dried, and the moisture content must be below 8%;
[0024] Step 2. At room temperature, calcium hydroxide, superphosphate, magnesium sulfate, and clinolite are respectively pulverized and ground, and after grinding, the above four components are passed through a 20-mesh sieve respectively.
[0025] Step 3. The sieved four components are uniformly prepared according to 20-30 parts of calcium hydroxide, 15-25 parts of superphosphate, 2-8 parts of magnesium sulfate, and 40-60 parts of clinolite. Mix, pass through a 20-mesh sieve again after mixing, and the final result is this soil conditioner.
Embodiment 1
[0027] A method for preparing a soil conditioner for reducing the content of heavy metals in soil, comprising the steps of: drying calcium hydroxide, superphosphate, magnesium sulfate, and clinolite, with a moisture content below 8%; at room temperature, respectively Calcium hydroxide, calcium superphosphate, magnesium sulfate, and clinopline are crushed and ground. After grinding, the above four components are passed through a 20-mesh sieve respectively; the following components are weighed according to parts by mass: 25 parts of calcium hydroxide, 20 parts of calcium phosphate, 5 parts of magnesium sulfate, and 50 parts of clinolite; the weighed calcium hydroxide, superphosphate, magnesium sulfate, and clinolite are mixed to prepare a soil conditioner for reducing heavy metal content in soil.
Embodiment 2
[0029] A method for preparing a soil conditioner for reducing the content of heavy metals in soil, comprising the steps of: drying calcium hydroxide, superphosphate, magnesium sulfate, and clinolite, with a moisture content below 8%; at room temperature, respectively Calcium hydroxide, calcium superphosphate, magnesium sulfate, and clinopline are crushed and ground. After grinding, the above four components are passed through a 20-mesh sieve respectively; the following components are weighed in parts by mass: 20 parts of calcium hydroxide, 25 parts of calcium phosphate, 2 parts of magnesium sulfate, and 60 parts of clinolite; the weighed calcium hydroxide, superphosphate, magnesium sulfate, and clinolite are mixed to prepare a soil conditioner for reducing heavy metal content in soil.
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