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Method for improving phytoremediation efficiency of chromium contaminated soil

A chromium-contaminated soil and phytoremediation technology, applied in the field of environmental protection, can solve the problems of affecting the efficiency of hyperaccumulation phytoremediation, difficult plant absorption, and low bioavailability of heavy metals

Inactive Publication Date: 2019-08-16
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0002] The phytoremediation efficiency of hyperaccumulators to heavy metal-contaminated soils depends on their ability to absorb and transport heavy metals in the soil. Because the bioavailability of heavy metals in soil is usually not high, it is difficult to be absorbed by plants, which affects the phytoremediation of hyperaccumulators. Repair efficiency

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  • Method for improving phytoremediation efficiency of chromium contaminated soil
  • Method for improving phytoremediation efficiency of chromium contaminated soil
  • Method for improving phytoremediation efficiency of chromium contaminated soil

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Experimental program
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Embodiment Construction

[0007] The embodiments provided below will describe the technical means and technical effects of the present invention.

[0008] 1.1. Test materials

[0009] 1.1.1. Test molasses

[0010] The molasses used in the test were all taken from a sugar factory, and the waste molasses was diluted by different multiples (1000 times, 5000 times and 10000 times) to obtain different concentrations of molasses aqueous solutions for the test.

[0011] 1.1.2. Test soil

[0012] Soil sample A: The test soil was taken from a simulated constructed wetland experimental system for chromium-containing wastewater treatment. It was naturally air-dried at room temperature, ground with an agate mortar, and passed through a 100-mesh nylon sieve for use; according to "Determination of Total Chromium in Soil by Flame Atomic Absorption" "Spectrophotometry" (HJ 491-2009), using a microwave digestion instrument to digest the soil sample, using an atomic absorption spectrophotometer, using the flame method to determi...

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Abstract

The invention discloses a method for improving the phytoremediation efficiency of chromium contaminated soil. The method achieves the purpose of improving the phytoremediation efficiency by using Leersia hexandra as a hyperaccumulator and diluted cane molasses (1000-10000 folds) as a chromium activator. Activation test, hydroponic test and potting test with the cane molasses as the activator provethat molasses can effectively activate the insoluble chromium in the soil, and the exogenous addition of the molasses facilitates the absorption of hexavalent chromium by the roots of the Leersia hexandra, and also facilitates the transportation of chromium to the overground part in plants. The molasses used as the activator provides an economical and effective way for improving the phytoremediation efficiency of the soil contaminated with chromium especially hexavalent chromium.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a method for improving the phytoremediation efficiency of Cr, especially hexavalent Cr contaminated soil by using molasses as an activator. Background technique [0002] The phytoremediation efficiency of hyperaccumulator plants on heavy metal contaminated soil depends on their ability to absorb and transport heavy metals in the soil. Because the bioavailability of heavy metals in soil is usually not high, it is difficult to be absorbed by plants, which affects the Repair efficiency. How to effectively activate the heavy metals in the soil and which super-accumulating plants to choose has become a key factor in improving the efficiency of phytoremediation, especially to solve the problem of activation of insoluble chromium. Summary of the invention [0003] The method for improving the phytoremediation efficiency of chromium-contaminated soil provided by th...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 伍婵翠邓金铭韦肖兰玉秀荣张学洪梁英蒋永荣梁楚欣
Owner GUILIN UNIV OF ELECTRONIC TECH
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