阅读说明：本技术 一种土壤污染修复试剂 (Soil pollution remediation reagent ) 是由 胡小耕 王波 马延龙 齐建宏 石雨心 张军 陈涛 王滔 于 2021-01-03 设计创作，主要内容包括：本发明提供一种土壤污染修复试剂,包括以下重量份的原料：聚丙烯酰胺40～50份、改性硅藻土20～30份、生石灰14～18份、腐殖酸钠4～8份、乙基二硫代碳酸钾3～6份、乙二胺四乙酸二钠4～8份、保水剂0.26～0.48份。本发明提出的土壤污染修复试剂,并操作简单、携带便捷,对重金属的处理效果好,在处理重金属的同时可以提高土壤有机质以及提高土壤对养分的吸收能力,避免土壤出现板结的现象,而且能够保证土壤中水分的含量,保证农作物的正常生长,对矿产周边的土壤修复效果好,修复周期短,而且修复试剂的制备过程简单。(The invention provides a soil pollution remediation reagent, which comprises the following raw materials in parts by weight: 40-50 parts of polyacrylamide, 20-30 parts of modified diatomite, 14-18 parts of quick lime, 4-8 parts of sodium humate, 3-6 parts of ethyl dithio potassium carbonate, 4-8 parts of disodium ethylene diamine tetraacetate and 0.26-0.48 part of water-retaining agent. The soil pollution remediation reagent provided by the invention is simple to operate, convenient to carry, good in treatment effect on heavy metals, capable of improving soil organic matters and improving the nutrient absorption capacity of soil while treating heavy metals, avoiding the soil hardening phenomenon, capable of ensuring the content of water in the soil, ensuring the normal growth of crops, good in remediation effect on the soil around minerals, short in remediation period, and simple in preparation process of the remediation reagent.)

1. The soil pollution remediation reagent is characterized by comprising the following raw materials in parts by weight: 40-50 parts of polyacrylamide, 20-30 parts of modified diatomite, 14-18 parts of quick lime, 4-8 parts of sodium humate, 3-6 parts of ethyl dithio potassium carbonate, 4-8 parts of disodium ethylene diamine tetraacetate and 0.26-0.48 part of water-retaining agent.

2. The soil pollution remediation agent of claim 1, comprising the following raw materials in parts by weight: 45 parts of polyacrylamide, 25 parts of modified diatomite, 16 parts of quick lime, 6 parts of sodium humate, 4 parts of ethyl dithio potassium carbonate, 6 parts of ethylene diamine tetraacetic acid and 0.32 part of water-retaining agent.

3. The soil pollution remediation agent of claim 1, wherein the modified diatomaceous earth is produced by the following method: according to the mass ratio of 20-26: 1: 3-6: 0.2-0.7, respectively weighing kieselguhr, cyclodextrin, epoxy linseed oil and phenanthroline, mixing the weighed kieselguhr, epoxy linseed oil and phenanthroline, adding ethanol with the mass being 3-6 times that of the kieselguhr, mixing and stirring at 60 ℃ for 20-30 min, cooling to room temperature, adding the weighed cyclodextrin, continuing stirring for 30min, then carrying out reduced pressure concentration, carrying out vacuum drying, and cooling to room temperature to obtain the modified kieselguhr.

4. The soil pollution remediation agent of claim 3, wherein the temperature of the vacuum drying is 50-55 ℃ and the time of the vacuum drying is 1-2 hours.

5. The soil pollution remediation agent of claim 1 or 2, wherein the water retaining agent is a combination of carboxymethyl starch and potassium polyacrylate.

6. The soil pollution remediation agent of claim 5, wherein the mass ratio of the carboxymethyl starch to the potassium polyacrylate is 12-15: 4, the compounding method comprises the following steps: and (3) placing the carboxymethyl starch and the potassium polyacrylate in a grinding machine, grinding at 40-50 ℃ for 30-50 min, and naturally cooling to room temperature to obtain the water-retaining agent.

7. The soil pollution remediation agent of claim 1, wherein the soil pollution remediation agent is produced by the following method: weighing 40-50 parts of polyacrylamide, 20-30 parts of modified diatomite, 14-18 parts of quick lime, 4-8 parts of sodium humate, 3-6 parts of ethyl dithio potassium carbonate, 4-8 parts of ethylene diamine tetraacetic acid and 0.26-0.48 part of water-retaining agent according to parts by weight; grinding the weighed polyacrylamide, the modified diatomite and the ethyl dithio potassium carbonate for 20-30 min, and mixing the weighed sodium humate, disodium ethylene diamine tetraacetate, quicklime and a water-retaining agent to obtain the soil pollution remediation reagent.

Technical Field

The invention relates to the technical field of mine soil remediation materials, in particular to a soil pollution remediation reagent.

Background

Mineral resources are valuable wealth endowed to human beings in nature, are material bases for social development and human survival, and are named after mineral products in the early society of human beings, such as stoneware era, bronze era, ironware era and the like, so that the huge influence of the mineral products on the development of the human society is fully proved. As society progresses, the kinds and the number of minerals used by human beings are drastically increased. However, mining of mineral resources causes serious pollution to surrounding soil, and the most serious is heavy metal pollution. Heavy metal pollution greatly reduces the soil quality, seriously degrades the ecosystem, and can influence the growth of crops around a mining area and the production and life of people. Due to the large area of mineral development, soil pollution has become one of the problems to be solved urgently. The main traditional soil remediation methods include engineering physical and chemical methods, agricultural chemical regulation and control methods and bioremediation methods, but the traditional soil remediation methods are often complex in operation and high in cost and have the defects of easy secondary pollution. With the more and more obvious disadvantages of the traditional soil remediation methods, more and more researchers begin to develop soil remediation agents. The soil remediation agent used in the market at present has the advantages of easiness in operation, convenience in use and the like, but the soil remediation effect is still to be improved, and the remediation period is long. Based on the defects in the prior art, the invention provides a soil pollution remediation reagent.

Disclosure of Invention

The invention aims to provide a soil pollution remediation reagent for solving the problems that the traditional soil pollution treatment method is complex in operation, high in cost and easy to leave secondary pollution, and the existing soil remediation agent is not ideal in remediation effect and long in remediation period.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a soil pollution remediation reagent comprises the following raw materials in parts by weight: 40-50 parts of polyacrylamide, 20-30 parts of modified diatomite, 14-18 parts of quick lime, 4-8 parts of sodium humate, 3-6 parts of ethyl dithio potassium carbonate, 4-8 parts of disodium ethylene diamine tetraacetate and 0.26-0.48 part of water-retaining agent.

In some embodiments, the soil pollution remediation agent comprises the following raw materials in parts by weight: 45 parts of polyacrylamide, 25 parts of modified diatomite, 16 parts of quick lime, 6 parts of sodium humate, 4 parts of ethyl dithio potassium carbonate, 6 parts of ethylene diamine tetraacetic acid and 0.32 part of water-retaining agent.

In some embodiments, the modified diatomaceous earth is prepared by: according to the mass ratio of 20-26: 1: 3-6: 0.2-0.7, respectively weighing kieselguhr, cyclodextrin, epoxy linseed oil and phenanthroline, mixing the weighed kieselguhr, epoxy linseed oil and phenanthroline, adding ethanol with the mass being 3-6 times that of the kieselguhr, mixing and stirring at 60 ℃ for 20-30 min, cooling to room temperature, adding the cyclodextrin with the specific gravity, continuing stirring for 30min, then carrying out reduced pressure concentration, carrying out vacuum drying, and cooling to room temperature to obtain the modified kieselguhr.

In some embodiments, the temperature of the vacuum drying is 50-55 ℃, and the time of the vacuum drying is 1-2 hours.

In some embodiments, the water retaining agent is a complex of carboxymethyl starch and potassium polyacrylate.

In some embodiments, the mass ratio of the carboxymethyl starch to the potassium polyacrylate is 12-15: 4, the compounding method comprises the following steps: and (3) placing the carboxymethyl starch and the potassium polyacrylate in a grinding machine, grinding at 40-50 ℃ for 30-50 min, and naturally cooling to room temperature to obtain the water-retaining agent.

In some embodiments, the soil contamination remediation agent is prepared by the following method: weighing 40-50 parts of polyacrylamide, 20-30 parts of modified diatomite, 14-18 parts of quick lime, 4-8 parts of sodium humate, 3-6 parts of ethyl dithio potassium carbonate, 4-8 parts of ethylene diamine tetraacetic acid and 0.26-0.48 part of water-retaining agent according to parts by weight; grinding the weighed polyacrylamide, the modified diatomite and the ethyl dithio potassium carbonate for 20-30 min, and mixing the weighed sodium humate, disodium ethylene diamine tetraacetate, quicklime and a water-retaining agent to obtain the soil pollution remediation reagent.

Compared with the prior art, the soil pollution remediation reagent provided by the invention has the advantages that:

1. the soil pollution remediation reagent provided by the invention is reasonable in formula, takes conventional polyacrylamide and quicklime as main raw materials to endow the soil pollution remediation reagent with a certain pollution treatment effect, is added with sodium humate, potassium ethyldithiocarbonate, disodium ethylene diamine tetraacetate and modified diatomite in a reasonable proportion to remarkably improve the treatment effect of the soil pollution remediation reagent on heavy metals, can improve the organic matters of the soil and the absorption capacity of the soil on nutrients while treating the heavy metals, avoids the phenomenon of hardening of the soil, and is matched with a water-retaining agent compounded by carboxymethyl starch and potassium polyacrylate to ensure the content of water in the soil and the normal growth of crops.

2. The restoration reagent provided by the invention is simple to operate, convenient to carry, good in restoration effect on soil around mineral products, short in restoration period and simple in preparation process.

3. The modified diatomite used in the invention is modified by using cyclodextrin, epoxy linseed oil and phenanthroline in a reasonable proportion, so that the modified diatomite can assist polyacrylamide to obviously improve the control effect of a repair reagent on heavy metals, and the use amount of the polyacrylamide can be greatly reduced.

The present invention is further described in detail below with reference to specific embodiments, but these descriptions are only for the purpose of better understanding and implementing the present invention by those skilled in the art, and do not limit the present invention in any way. Unless defined otherwise, all scientific and technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and the relevant art. Features described in various embodiments of the present invention, or in various portions of the disclosure, including but not limited to numerical values, may be freely combined to form new features and solutions without departing from the scope of the disclosure as originally set forth.

Detailed Description

The invention will be further illustrated with reference to specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. The scope of the invention is only limited by the appended claims. After reading this disclosure, those skilled in the art will be able to make various modifications and changes to the invention without departing from the spirit and scope of the invention, and such modifications and changes should be considered as equivalents of the embodiments of the invention and fall within the scope of the invention. Unless otherwise indicated, the materials or instruments used in the examples are commercially available and the experimental procedures used are all accomplished by standard procedures known in the art.

Example 1

The invention provides a soil pollution remediation reagent which comprises the following raw materials in parts by weight: 40 parts of polyacrylamide, 20 parts of modified diatomite, 18 parts of quick lime, 4 parts of sodium humate, 6 parts of ethyl dithio potassium carbonate, 8 parts of ethylene diamine tetraacetic acid and 0.48 part of water-retaining agent;

the modified diatomite is prepared by the following method: according to the mass ratio of 20: 1: 3: 0.2 respectively weighing kieselguhr, cyclodextrin, epoxy linseed oil and phenanthroline, mixing the kieselguhr, the epoxy linseed oil and the phenanthroline with the specific gravity, adding ethanol with the mass 6 times of that of the kieselguhr, mixing and stirring at 60 ℃ for 20min, cooling to room temperature, adding the cyclodextrin with the specific gravity, continuing stirring for 30min, then concentrating under reduced pressure, drying in vacuum at 50 ℃ for 2h, and cooling to room temperature to obtain modified kieselguhr;

wherein the water-retaining agent is a compound of carboxymethyl starch and potassium polyacrylate; the mass ratio of the carboxymethyl starch to the potassium polyacrylate is 12: 4, the compounding method comprises the following steps: placing carboxymethyl starch and potassium polyacrylate in a grinder, grinding at 50 ℃ for 30min, and naturally cooling to room temperature to obtain a water-retaining agent;

the soil pollution remediation reagent is prepared by the following method: weighing 40 parts of polyacrylamide, 20 parts of modified diatomite, 18 parts of quick lime, 4 parts of sodium humate, 6 parts of ethyl dithio potassium carbonate, 8 parts of disodium ethylene diamine tetraacetate and 0.48 part of water-retaining agent according to parts by weight; and grinding the polyacrylamide, the modified diatomite and the ethyldithio potassium carbonate with the specific gravity for 30min, and then mixing the sodium humate, the disodium ethylene diamine tetraacetate, the quicklime and the water-retaining agent with the specific gravity to obtain the soil pollution remediation reagent.

Example 2

The invention provides a soil pollution remediation reagent which comprises the following raw materials in parts by weight: 45 parts of polyacrylamide, 25 parts of modified diatomite, 16 parts of quick lime, 6 parts of sodium humate, 4 parts of ethyl dithio potassium carbonate, 6 parts of ethylene diamine tetraacetic acid and 0.32 part of water-retaining agent;

the modified diatomite is prepared by the following method: according to the mass ratio of 23: 1: 4: 0.5 respectively weighing kieselguhr, cyclodextrin, epoxy linseed oil and phenanthroline, mixing the kieselguhr, the epoxy linseed oil and the phenanthroline with the specific gravity, adding ethanol with the mass of 5 times of that of the kieselguhr, mixing and stirring at 60 ℃ for 25min, cooling to room temperature, adding the cyclodextrin with the specific gravity, continuing stirring for 30min, then concentrating under reduced pressure, drying at 55 ℃ for 1.5h in vacuum, and cooling to room temperature to obtain modified kieselguhr;

wherein the water-retaining agent is a compound of carboxymethyl starch and potassium polyacrylate; the mass ratio of the carboxymethyl starch to the potassium polyacrylate is 13: 4, the compounding method comprises the following steps: placing carboxymethyl starch and potassium polyacrylate in a grinder, grinding at 45 ℃ for 40min, and naturally cooling to room temperature to obtain a water-retaining agent;

the soil pollution remediation reagent is prepared by the following method: weighing 45 parts of polyacrylamide, 25 parts of modified diatomite, 16 parts of quick lime, 6 parts of sodium humate, 4 parts of ethyl dithio potassium carbonate, 6 parts of disodium ethylene diamine tetraacetate and 0.32 part of water-retaining agent according to parts by weight; and grinding the polyacrylamide, the modified diatomite and the ethyldithio potassium carbonate with the specific gravity for 20min, and then mixing the sodium humate, the disodium ethylene diamine tetraacetate, the quicklime and the water-retaining agent with the specific gravity to obtain the soil pollution remediation reagent.

Example 3

The invention provides a soil pollution remediation reagent which comprises the following raw materials in parts by weight: 50 parts of polyacrylamide, 30 parts of modified diatomite, 14 parts of quick lime, 8 parts of sodium humate, 3 parts of ethyl dithio potassium carbonate, 4 parts of ethylene diamine tetraacetic acid and 0.26 part of water-retaining agent;

the modified diatomite is prepared by the following method: according to the mass ratio of 26: 1: 6: 0.7 respectively weighing kieselguhr, cyclodextrin, epoxy linseed oil and phenanthroline, mixing the kieselguhr, the epoxy linseed oil and the phenanthroline with the specific gravity, adding ethanol with the mass of 3 times of that of the kieselguhr, mixing and stirring at 60 ℃ for 30min, cooling to room temperature, adding the cyclodextrin with the specific gravity, continuing stirring for 30min, then concentrating under reduced pressure, drying at 55 ℃ for 1h in vacuum, and cooling to room temperature to obtain modified kieselguhr;

wherein the water-retaining agent is a compound of carboxymethyl starch and potassium polyacrylate; the mass ratio of the carboxymethyl starch to the potassium polyacrylate is 15: 4, the compounding method comprises the following steps: placing carboxymethyl starch and potassium polyacrylate in a grinder, grinding at 40 ℃ for 50min, and naturally cooling to room temperature to obtain a water-retaining agent;

the soil pollution remediation reagent is prepared by the following method: weighing 50 parts of polyacrylamide, 30 parts of modified diatomite, 14 parts of quick lime, 8 parts of sodium humate, 3 parts of ethyl dithio potassium carbonate, 4 parts of disodium ethylene diamine tetraacetate and 0.26 part of water-retaining agent according to parts by weight; and grinding the polyacrylamide, the modified diatomite and the ethyldithio potassium carbonate with the specific gravity for 20min, and then mixing the sodium humate, the disodium ethylene diamine tetraacetate, the quicklime and the water-retaining agent with the specific gravity to obtain the soil pollution remediation reagent.

Comparative example 1

The invention provides a soil pollution remediation reagent which comprises the following raw materials in parts by weight: 40 parts of polyacrylamide, 20 parts of modified diatomite, 18 parts of quick lime, 4 parts of sodium humate, 6 parts of ethyl dithio potassium carbonate, 8 parts of ethylene diamine tetraacetic acid and 0.48 part of water-retaining agent;

the modified diatomite is prepared by the following method: according to the mass ratio of 20: 1, respectively weighing kieselguhr and cyclodextrin, adding ethanol with the mass 6 times of that of the kieselguhr into the kieselguhr with the specific gravity, mixing and stirring at 60 ℃ for 20min, cooling to room temperature, adding the cyclodextrin with the specific gravity, continuing stirring for 30min, then carrying out reduced pressure concentration, carrying out vacuum drying at 50 ℃ for 2h, and cooling to room temperature to obtain modified kieselguhr;

wherein the water-retaining agent is a compound of carboxymethyl starch and potassium polyacrylate; the mass ratio of the carboxymethyl starch to the potassium polyacrylate is 12: 4, the compounding method comprises the following steps: placing carboxymethyl starch and potassium polyacrylate in a grinder, grinding at 50 ℃ for 30min, and naturally cooling to room temperature to obtain a water-retaining agent;

the soil pollution remediation reagent is prepared by the following method: weighing 40 parts of polyacrylamide, 20 parts of modified diatomite, 18 parts of quick lime, 4 parts of sodium humate, 6 parts of ethyl dithio potassium carbonate, 8 parts of disodium ethylene diamine tetraacetate and 0.48 part of water-retaining agent according to parts by weight; and grinding the polyacrylamide, the modified diatomite and the ethyldithio potassium carbonate with the specific gravity for 30min, and then mixing the sodium humate, the disodium ethylene diamine tetraacetate, the quicklime and the water-retaining agent with the specific gravity to obtain the soil pollution remediation reagent.

The method is used for repairing the soil polluted by some mineral products in northwest, and the detected soil has the Pb content of 10.92mg/kg, the Cd content of 1.64mg/kg and the As content of 5.59mg/kg before repair. The soil pollution remediation agent prepared in the embodiments 1 to 3 and the comparative example 1 is used for remediation. And (3) repairing process: the soil of the restoration site is dug out and placed in the stacking site, the soil is uniformly mixed and divided into 4 parts, the parts are respectively marked as a first group, a second group, a third group and a fourth group, the restoration reagent prepared in the embodiment 1 is added into the first group, the restoration reagent prepared in the embodiment 2 is added into the second group, the restoration reagent prepared in the embodiment 3 is added into the third group, and the restoration reagent prepared in the comparative example 1 is added into the fourth group. The addition amount of the remediation reagent is 0.4 percent of the soil mass, the remediation reagent is added and then mixed evenly, watering is carried out to keep the soil moisture content at about 15 percent, and the soil is kept for 20 days, thus completing remediation.

The soil of the first to fourth groups was examined and the results are shown in Table 1.

TABLE 1

As can be seen from Table 1, the soil remediation reagents prepared in the embodiments 1 to 3 (the first to third groups) of the invention can achieve the purpose of excellent fixation of heavy metals after 20 days of remediation, and have good remediation effect on soil. As can be seen from the comparison of the repair data of the soil repair agents prepared in example 1 (first group) and comparative example 1 (fourth group), the content of heavy metals in the fourth group after repair is obviously higher than that of example 1, and As can be seen from the reduction rates of Pb, Cd and As of example 1 and comparative example 1, the reduction rate of example 1 (first group) is obviously higher than that of comparative example 1 (fourth group), so that the control effect of the repair agents on the heavy metals can be obviously improved by modifying the diatomite with the epoxy linseed oil and the phenanthroline.

Tests show that when the soil remediation reagent prepared in the embodiment 1-3 is used for remediating polluted soil, the remediated soil has no hardening phenomenon, wheat and potatoes planted in the remediated soil can grow normally, and planted agricultural products are good in growth vigor, full and high in yield.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.