Method for restoring tailings pond through cooperation of Cassia alata and charcoal

A joint restoration technology of Cassia pterygium, applied to the restoration of contaminated soil, etc., to achieve the effects of vegetation restoration, reduction of poisonous effects, and cost reduction

Inactive Publication Date: 2018-07-27
SUN YAT SEN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, how to effectively use Cassia chinensis for reclamation poses a difficult problem

Method used

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  • Method for restoring tailings pond through cooperation of Cassia alata and charcoal
  • Method for restoring tailings pond through cooperation of Cassia alata and charcoal
  • Method for restoring tailings pond through cooperation of Cassia alata and charcoal

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Experimental program
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Effect test

Embodiment 1

[0039](1) Heterogeneity Analysis of Tailings Pond

[0040] Through field surveys, samples were collected for analysis of physical and chemical properties, so as to gain an in-depth understanding of the heavy metal pollution status and pollution characteristics of the remediation site. The lead-zinc tailings are mined from the tailings pond of the lead-zinc mine in Bingcun, Meixian County (116°13′0″E, 24°23′10″N), with an annual average temperature of 21.2°C, an annual average rainfall of 1472.9mm, and a relative humidity of 78% , frost-free period 306d. The tailings pond is a fourth-class pond, the total dam height of the tailings pond is 36m, and the accumulated tailings in the mine are about 38×10 4 m 3 .

[0041] (2) Preparation of biochar

[0042] Raw material preparation: Kenaf stalks were collected from the heavy metal-polluted vegetation restoration test base in Shangba Village, Dabaoshan, Shaoguan, Guangdong. Chicken manure was purchased from the market. The sludge...

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Abstract

The invention provides a method for restoring tailings pond through cooperation of Cassia alata and charcoal, and belongs to the technical field of mining wasteland ecological restoration. The methodcomprises the steps that 1, charcoal is added in tailings pond soil to prepare mixed tailings soil for balance; and 2, Cassia alata plants are planted in the mixed tailings soil. The Cassia alata andthe charcoal are cooperated to for tailings reclamation, charcoal is comprehensively utilized for improving the tailings matrix and reducing the toxic effect of heavy metal on plants, the biological nitrogen fixation effect of the Cassia alata is achieved, adverse effects of tailings acid, toxicity and barren on plant reclamation are relieved, improvement of physical and chemical properties of soil is promoted, and the tailings restoring cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration of abandoned mine lands, and in particular relates to a method for jointly repairing tailings ponds with leguminous plants and biochar, in particular to a method for jointly repairing tailings ponds with cassia cassia and biochar. Background technique [0002] Tailings refer to the residue after ore extraction and beneficiation, which are rich in primary minerals. Strictly speaking, it is not soil, but a parent material. Most of the tailings ponds have serious water erosion and wind erosion, and often become bare land, resulting in a large amount of migration and diffusion of pollutants, which brings serious hidden dangers to the food safety, ecological safety and even social harmony of residents in the surrounding areas of the mine, seriously affecting ecological safety and mining. sustainable development. The reclamation rate of land affected by mining in my country is only 13.3%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/08B09C1/105B09C2101/00
Inventor 王诗忠黄礼格李元媛丁铿博赵曼杨璐仇荣亮晁元卿汤叶涛
Owner SUN YAT SEN UNIV
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