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Preparation method of soil remediation material

A technology for soil remediation and preparation steps, applied in the field of soil remediation material preparation, can solve the problems of single efficacy, poor heavy metal adsorption effect and poor decomposition efficiency of organic pollutants, etc., and achieve the effect of improving adsorption performance

Inactive Publication Date: 2019-06-14
雷小鹏
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Problems solved by technology

[0009] The main technical problem to be solved by the present invention is to provide a preparation method of a soil repair material for the defects that the current soil repair materials have a single effect, and the adsorption effect on heavy metals in the soil and the decomposition efficiency of organic pollutants are relatively poor.

Method used

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preparation example Construction

[0032] Preparation of modified silica gel: Take 100mL of sodium silicate solution with a mass fraction of 30% and pour it into a three-necked flask with a stirrer, slowly adjust the pH to 6 with hydrochloric acid with a mass fraction of 10%, start the stirrer, and set the temperature at 350r / Stir at min speed for 30 minutes, microwave oscillation treatment for 3 minutes, set the microwave oscillation frequency to 23kHz to obtain nano-hydrosol, put the nano-hydrosol in an oven, heat up to 80°C, and dry for 3 hours to obtain nano-silica gel;

[0033] Weigh 200g of nano silica gel and place it in 400mL of methanesulfonic acid aqueous solution with a mass fraction of 40%, control the temperature at 50°C, and stir for 20 minutes to obtain activated silica gel. The mass ratio of activated silica gel to chloropropyltrimethoxysilane is 2: 1 mixed to obtain the reaction material, 200g of the reaction material was placed in 400mL of xylene and reacted for 40 to obtain modified silica ge...

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Abstract

The invention relates to the field of soil remediation and relates to a preparation method of a soil remediation material. According to the invention, after natural attapulgite clay is subjected to acid treatment, impurities such as dolomite and calcium carbonate are removed, the bonding force between original molecules is weakened, pore channels are dredged, uniformly-distributed gaps are formedon the surface, the adsorption performance of the soil remediation material is improved, activation pore channels are provided for the load of nano zero-valent iron, polyethyleneimine is tightly adsorbed on the inner surface of silica gel pores to form a nanofiltration film, heavy metal ions can be adsorbed and concentrated, the heavy metal ions can be efficiently adsorbed, the zero-valent iron can increase the effective surface area of nano-particles and enhance the active sites, and the electron transfer is enhanced, so that the adsorption efficiency is improved, the zero-valent iron can exchange heavy metals in the soil after being oxidized, after ferrous ions are fixed by Rhodococcus coprophilus, metabolic channels are induced to change, more degradable soil organic pollutants can be secreted, and the method has a wide application prospect.

Description

technical field [0001] The invention relates to the field of soil restoration, and relates to a preparation method of a soil restoration material. Background technique [0002] At present, due to the development of industry and transportation, such as the development of shale oil and gas, the exploitation and utilization of oil and coal, and the construction and production of various chemical plants, soil pollution plagues developed countries and rapidly developing developing countries and regions. Soil remediation becomes a challenge that must be addressed in these regions. For countries with advanced environmental protection, the soil remediation industry accounts for 30% to 50% of the total environmental protection industry, while China is basically blank at present, with a huge gap in market demand. [0003] There are many reasons for soil pollution, such as industrial sludge, agricultural garbage, sewage irrigation, pollutant deposition in the atmosphere, and the exten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
Inventor 雷小鹏
Owner 雷小鹏
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