Guar gum-inorganic salt hybrid green flocculant applied to enhanced dehydration of sediment and fixation of heavy metals and preparation method thereof

Abstract

The invention discloses a guar gum-inorganic salt hybrid green flocculant and a preparation method thereof. The natural organic polymer guar gum is used as a raw material, and the sulfonated guar gum is firstly obtained through a sulfonation reaction, and then mixed with ethylene The silane-crosslinked guar gum molecules obtained by grafting and copolymerizing siloxane-based siloxanes are finally obtained by further hydrolytic polymerization with inorganic aluminum salts or iron salts under alkaline conditions. The organic and inorganic parts in the flocculant molecules of the present invention are combined by covalent bonds, fully exerting the synergistic flocculation synergistic effect of organic and inorganic, and ensuring the stability of the product; containing a relatively high charge density, improving the electrical neutralization performance of the colloid in the water body , the target range of flocculation conditioning is widened; after sulfonation modification, it contains rich hydroxyl groups and sulfonic acid groups, which has excellent adsorption and complexation capabilities for heavy metal ions, and the bridging ability in the flocculation process is enhanced, and the product has high efficiency. Flocculation effect, lower dosage.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and in particular relates to a guar gum-inorganic salt hybrid green flocculant and a preparation method thereof. Background technique [0002] At present, water environment treatment measures such as improving the quality and efficiency of drainage pipe networks and remediation of black and odorous water bodies have produced a large amount of drainage pipe sludge and river and lake bottom sludge. The large amount of sediment produced contains pollutants such as heavy metals, which must be reduced and harmlessly treated. Rapid dehydration and solidification and stabilization of heavy metals are important requirements for sediment treatment and disposal. The main methods of sediment dehydration are mechanical dehydration, biological dehydration and chemical dehydration. Among them, chemically regulated dehydration uses chemical regulators to accelerate the sedimentation rat...

AI Technical Summary

Problems solved by technology

However, the charge density of its molecule itself is small, and the removal effect on negatively charged suspended particles in the water body is poor, and the molecular weight is low, and the molecule is unstable, so the treatment effect is very limited.

In order to improve the treatment effect of guar gum, blending inorganic metal flocculants with guar gum is a solution to prepare compound flocculants, but because the blended flocculants are only simple physical blending, there is no chemical bonding force , the stability of the compound flocculant is poor, and the flocculation effect is limited

[0005] At present, there are few studies on organic-inorganic covalently linked flocculants based on guar gum at home and abroad, and the relevant reports on using it as a flocculation dehydrating agent and heavy metal curing agent in sediment disposal are even more limited.

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