Process for preparing bentonite dephosphorization water purification agent
A technology of phosphorus water purifier and bentonite, which is applied in the field of environmental protection treatment, can solve the problems of low phosphorus removal, inability to achieve advanced treatment, and inability to inhibit the release of dissolved phosphorus in sediment.
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Embodiment 1
[0012] A preparation method of bentonite phosphorus removal water purifier, the preparation method comprises the following steps:
[0013] (1) Weigh 3g of lanthanum chloride heptahydrate, dissolve it in 400ml of deionized water, and stir at 60°C; weigh 20g of sodium-based bentonite that has been dried, crushed, and passed through a 200-mesh sieve, and slowly and evenly add it to the aqueous solution of lanthanum chloride , after stirring for 2 hours, wash 4 times with deionized water, filter and dehydrate, then put the obtained filter cake into 200ml deionized, and stir to form a suspension;
[0014] (2) Weigh 2g polyaluminum ferric chloride, add it into the suspension, stir at room temperature for 4 hours, then dehydrate, and filter to obtain a filter cake;
[0015] (3) Dry the filter cake at 70° C. for 24 hours, pulverize it, and pass it through a 200-mesh sieve to obtain the phosphorus-removing water purifying agent of the present invention.
[0016] The method for using t...
Embodiment 2
[0022] A preparation method of bentonite phosphorus removal water purifier, the preparation method comprises the following steps:
[0023] (1) Weigh 5g of lanthanum chloride heptahydrate, dissolve it in 300ml of deionized water, and stir at 40°C; weigh 20g of calcium-based bentonite that has been dried, crushed, and passed through a 200-mesh sieve, and slowly and evenly add it to the aqueous solution of lanthanum chloride , after stirring for 6 hours, wash twice with deionized water, filter and dehydrate, then put the obtained filter cake into 100ml deionized, and stir to form a suspension;
[0024] (2) Weigh 3g of polyaluminum chloride, add it to the suspension, stir at 40°C for 2 hours, then dehydrate, and filter to obtain a filter cake;
[0025] (3) Dry the filter cake at 80° C. for 24 hours, crush it, and pass it through a 200-mesh sieve to obtain the phosphorus-removing water purifier.
[0026] The method for using the phosphorus removal water purifier to remove phosphor...
Embodiment 3
[0032] A preparation method of bentonite phosphorus removal water purifier, the preparation method comprises the following steps:
[0033] (1) Weigh 7g of lanthanum chloride heptahydrate, dissolve it in 200ml of deionized water, and stir at room temperature; weigh 20g of sodium-based bentonite that has been dried, pulverized, and passed through a 200-mesh sieve, and slowly and evenly add it to the aqueous solution of lanthanum chloride. After stirring for 12 hours, wash with deionized water 3 times, filter and dehydrate, then put the obtained filter cake into 150ml deionized, and stir to form a suspension;
[0034] (2) Weigh 4g of polyferric chloride, add it to the suspension, stir at 60°C for 6 hours, then dehydrate, and filter to obtain a filter cake;
[0035] (3) Dry the filter cake at 90° C. for 24 hours, crush it, and pass it through a 200-mesh sieve to obtain the phosphorus-removing water purifier.
[0036] The method for using the phosphorus removal water purifier to r...
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