A method for preventing and controlling phosphorus-contaminated ditch matrix when paddy fields recede
A technology for phosphorus pollution and paddy fields, applied in the field of soil pollution remediation, can solve problems such as limited absorption by plants, water pollution, etc., and achieve the effects of simple treatment method, weak desorption ability, and easy availability of materials
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Embodiment 1
[0023] A treatment method for preventing and controlling phosphorus-contaminated ditch substrate in rice field receding water, comprising the following steps:
[0024] 1. Soil treatment: The soil is collected from the 0-20 cm deep sediment of the Panjin paddy field backwater branch channel, removes the plant roots and stones, and air-dries naturally. During the air-drying process, it is often turned, and dried to a moisture content of 48.5wt%, and the water content exceeds 2 mm. sieve spare;
[0025] 2. Treatment of fine sand: purchased from the building materials market, passed through a 1 mm sieve;
[0026] 3. Treatment of red mud: It is taken from the red mud dump of Shandong Aluminum Industry Company, with an alumina content of 7.85%, an iron oxide content of 11.14%, a bulk density of 1.35 tons / m3, and a specific surface area of about 178 square meters / g. 80 mesh.
[0027] 4. Treatment of zeolite: purchased from Yixing, Jiangsu. Mix clinoptilolite with aluminum chlori...
Embodiment 2
[0033] A treatment method for preventing and controlling phosphorus-contaminated ditch substrate in rice field receding water, comprising the following steps:
[0034] 1. Soil treatment: The soil was collected from the 0-20 cm deep soil of the Panjin Gaosheng paddy field backwater branch canal, and the plant roots and stones in the soil were removed, and transported back to the laboratory for air drying. Moisture content 46.2wt%, pass through a 3 mm sieve for subsequent use;
[0035] 2. Treatment of fine sand: purchased from the building materials market, passed through a 2 mm sieve;
[0036] 3. Treatment of red mud: It is taken from the red mud dump of Shandong Aluminum Industry Company, with an alumina content of 7.85%, an iron oxide content of 11.14%, a bulk density of 1.35 tons / m3, and a specific surface area of about 178 square meters / g. 100 mesh.
[0037] 4. Treatment of zeolite: purchased from Yixing, Jiangsu. Mix clinoptilolite with aluminum chloride and magnesium...
Embodiment 3
[0044] A treatment method for preventing and controlling phosphorus-contaminated ditch substrate in rice field receding water, comprising the following steps:
[0045] 1. Soil treatment: The soil is the sedimentary soil of Shenyang Xinmin paddy field dewatering ditches. The 0-20 cm deep part is taken and air-dried naturally. During the air-drying process, plant residues and stones are removed, and air-dried to a moisture content of 54wt%, loosened to a natural state , passed through a 3mm sieve for later use;
[0046] 2. Treatment of fine sand: take from the river sand that has passed through 2 sieves for later use;
[0047] 3. Treatment of red mud: taken from Zhongzhou Aluminum Plant, the content of alumina is 12.85%, the content of iron oxide is 10.14%, the bulk density is 1.42 tons / m3, the specific surface area is about 156 square meters / g, and the grinding is 100 mesh.
[0048] 4. Treatment of zeolite: the main component is clinoptilolite. Mix clinoptilolite with aluminu...
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