Phytoremediation activator and phytoremediation method for heavy metal contaminated soil

A phytoremediation and activator technology, applied in the field of soil remediation, can solve the problems of GLDA being easy to degrade, rarely used, and difficult to apply, etc., to achieve the effect of improving extraction capacity, improving usability and feasibility, and improving soil remediation efficiency

Active Publication Date: 2017-11-28
浙江博世华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, GLDA is easy to degrade, difficult to apply in liquid form, and has no effect on plant growth, so it is rarely used in phytoremediation.

Method used

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  • Phytoremediation activator and phytoremediation method for heavy metal contaminated soil
  • Phytoremediation activator and phytoremediation method for heavy metal contaminated soil
  • Phytoremediation activator and phytoremediation method for heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 Preparation of Phytoremediation Activator

[0050] A kind of phytoremediation activator, its preparation method is: get 133.4L concentration and be the tetrasodium glutamic acid diacetate (GLDA) aqueous solution of 250mol / L, 438.3kg sawdust, after 187.5kg particle diameter is the phosphate rock powder of 100 μ m mixing, Mix with 188kg nutrient soil (adding before use, now mix and use now), after mixing evenly, obtain the phytoremediation activator of 50kg (wherein, water content is 7wt%).

[0051] Take 2kg of the above-mentioned phytoremediation activator (sealed storage) and place them in a 4°C refrigerator (treatment A) and a 25°C incubator (treatment B) for preservation (sealed intact), and then take 1kg of the above-mentioned phytoremediation activator and 100g of nutrient soil Mix and store in a simulated soil environment at room temperature (20-30°C) (treatment C) (sealed to avoid water loss), and detect the degradation efficiency of GLDA.

[0052] T...

Embodiment 2

[0054] Example 2 Preparation of Phytoremediation Activator

[0055] A kind of phytoremediation activator, its preparation method is: get 400.2L and contain 750mol tetrasodium glutamic acid diacetate (GLDA) aqueous solution, 263.0kg sawdust, after 112.5kg particle diameter is 200 μ m phosphate rock powder mix, then mix with 65kg The nutrient soil is mixed, and after mixing evenly, 20kg of phytoremediation activator (water content is 21wt%) is obtained.

Embodiment 3

[0104] Example 3 Restoration of Heavy Metal Compound Contaminated Soil

[0105] The heavy metal complex polluted soil in this example is the farmland soil around a lead smelting enterprise in Henan.

[0106] For the above-mentioned heavy metal compound polluted soil, the phytoremediation method of the present embodiment specifically includes the following contents:

[0107] (1) Interplanting system of sedum and centipede grass:

[0108] From March to April or September to October every year, collect Sedum sedum plants, cut the plants into small sections of 10-15cm with a guillotine; draw a ditch on the surface of the field, and spread the cut sections evenly in the ditch After that, cover the soil and fill it up. Simultaneously, keep row spacing 20-25cm, get the centipede grass seedling strain about 20cm high, dig a hole in the field and plant, the spacing between the centipede grasses is 10-15cm.

[0109] (2) Application of Phytoremediation Activator

[0110] Phytoremedia...

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Abstract

The invention discloses a phytoremediation activator and a phytoremediation method for heavy metal contaminated soil. In terms of 1000 kg of the phytoremediation activator, the phytoremediation activator is prepared from the following components: 30-350 mol of GLDA (N,N-bis(carboxymethyl)-L-glutamic acid tetrasodium salt), 100-200 kg of ground phosphate rock, 250-450 kg of sawdust, 50-200 kg of auxiliary materials and the balance of water. GLDA, the ground phosphate rock and the sawdust are combined, the obtained phytoremediation activator can significantly improve heavy metal arsenic and cadmium extraction capacity of Sedum alfredii and octopus, and soil remediation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a phytoremediation activator and a phytoremediation method aimed at heavy metal compound polluted soil. Background technique [0002] Arsenic and cadmium are one of the most toxic elements in the environment to plants, animals and humans. They can cause lesions or distortions in the internal organs of animals and humans, and are recognized carcinogenic elements. Mining and smelting processes are major sources of both heavy metals in the environment. According to statistics, from 1850 to 2000 in the industrial era, the cumulative discharge of arsenic reached about 3.289 million tons, of which about 30% arsenic entered the soil along with the discharge of waste water, waste gas and waste residue, causing farmland soil pollution. It is estimated that the warranty period for Cd pollution in China is about 80 million mu, and the cultivated land polluted by arsenic, cadmium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/00C09K101/00
Inventor 陈昆柏温俊明陈宝段德超张明赵怡阳董畅许建刚徐辰
Owner 浙江博世华环保科技有限公司
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