Carbonized straw/diatomite molecular sieve demanganization adsorbent doped with modified humic acid

Abstract

The invention discloses a carbonized straw / diatomite molecular sieve demanganization adsorbent doped with modified humic acid. Straw and diatomite are adopted as base materials, so that production cost is lowered; a modified humic acid adsorption material is dopted in the base materials, and the modified humic acid is prepared by complexing synthesized colloidal nano manganese dioxide and free manganese ions, so that selective adsorptivity of the adsorbent to manganese ions in water is improved, and curing process of a surface active film is promoted. The novel adsorbent is of a unique nano molecular sieve structure, is quicker in adsorption process, convenient to reuse after desorption, higher in efficiency than conventional demanganization materials, little in influence caused by pH value of the water, free of polluting the water, high in adsorption sensitivity and especially suitable for treatment of drinking water sources with manganese slightly exceeding standards.

Description

technical field

[0001] The invention relates to the technical field of water treatment materials, in particular to a carbonized straw / diatomite molecular sieve manganese removal adsorbent mixed with modified humic acid. Background technique

[0002] At present, most cities in my country have or gradually use reservoirs and lakes as the main source of urban water supply. Therefore, reservoirs and lakes play an important role in water source cities. Reservoirs and lakes are closely related to human life and production. The source of water and production water, lake water also plays a significant role in regulating the natural environment. However, in summer, with the occurrence of reservoir stratification events and hypoxia at the bottom of the reservoir, manganese in the pore water migrates to the overlying lake water, redox The boundary layer moves up into the reservoir, causing a large amount of manganese in the sediment to be released to the overlying water body, and the dis...

Examples

Embodiment Construction

[0013] The adsorbent in this example is made from the following raw materials in parts by weight: straw 12, diatomaceous earth 55, manganese sulfate 5, potassium permanganate 2.5, sodium sulfite 0.1, humic acid 4, sulfuric acid solution, sodium hydroxide 55, Sodium polystyrene sulfonate 2.5, appropriate amount of deionized water.

[0014] The preparation method is:

[0015] (1) The straw is cleaned, dehydrated, dried and pulverized, and the treated material is carbonized at 350°C to obtain carbonized straw powder for later use;

[0016] (2) Roast the diatomite at 550°C for 2.5h, take it out and cool it, then put it into a sulfuric acid solution with a concentration of 2mol / L, mix and react at 80-90°C for 6h, after the reaction is completed, filter, wash with water, Dry to obtain purified diatomaceous earth powder for subsequent use;

[0017] (3) Dissolve potassium permanganate in deionized water and prepare a solution with a concentration of 10% for later use; dissolve manga...

technical field

[0001] The invention relates to the technical field of water treatment materials, in particular to a carbonized straw / diatomite molecular sieve manganese removal adsorbent mixed with modified humic acid. Background technique

[0002] At present, most cities in my country have or gradually use reservoirs and lakes as the main source of urban water supply. Therefore, reservoirs and lakes play an important role in water source cities. Reservoirs and lakes are closely related to human life and production. The source of water and production water, lake water also plays a significant role in regulating the natural environment. However, in summer, with the occurrence of reservoir stratification events and hypoxia at the bottom of the reservoir, manganese in the pore water migrates to the overlying lake water, redox The boundary layer moves up into the reservoir, causing a large amount of manganese in the sediment to be released to the overlying water body, and the dis...

Examples

Embodiment Construction

[0013] The adsorbent in this example is made from the following raw materials in parts by weight: straw 12, diatomaceous earth 55, manganese sulfate 5, potassium permanganate 2.5, sodium sulfite 0.1, humic acid 4, sulfuric acid solution, sodium hydroxide 55, Sodium polystyrene sulfonate 2.5, appropriate amount of deionized water.

[0014] The preparation method is:

[0015] (1) The straw is cleaned, dehydrated, dried and pulverized, and the treated material is carbonized at 350°C to obtain carbonized straw powder for later use;

[0016] (2) Roast the diatomite at 550°C for 2.5h, take it out and cool it, then put it into a sulfuric acid solution with a concentration of 2mol / L, mix and react at 80-90°C for 6h, after the reaction is completed, filter, wash with water, Dry to obtain purified diatomaceous earth powder for subsequent use;

[0017] (3) Dissolve potassium permanganate in deionized water and prepare a solution with a concentration of 10% for later use; dissolve manga...