Title:
METHOD FOR PREPARING IRON SILICON SULFUR MULTI-ELEMENT COMPOSITE BIOCHAR SOIL HEAVY METAL CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2017/147979
Kind Code:
A1
Abstract:
A method for preparing an iron silicon sulfur multi-element composite biochar soil heavy metal conditioner, comprising: adding silicate to agricultural wastes and roasting with air isolated to enable silicate to enter structural pores of biochar; enabling iron-containing slats to gather on kaolinite with a given proportion; enabling sulfate to gather on bentonite with a given proportion; mixing the three materials evenly according to a given proportion; and adding diatomite and starch to the mixture, and pelleting to prepare the iron silicon sulfur multi-element composite biochar soil heavy metal conditioner. The conditioner can be widely applied in soil heavy metal pollution abatement of rice fields, and it is able to synchronously passivate composite pollutants in acid or alkaline soils, such as cadmium, arsenic, and lead, so as to reduce the amount of pollutants absorbed by and accumulated in the rice, thereby achieving safe utilization of polluted farmland. By using the conditioner, the purpose of synchronous passivation of multi-heavy-metal composite pollutants can be achieved by the passivation effect of various effective components on various heavy metals.
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Inventors:
LIU CHUANPING (CN)
LI FANGBAI (CN)
WANG XIANGQIN (CN)
LI FANGBAI (CN)
WANG XIANGQIN (CN)
Application Number:
PCT/CN2016/079110
Publication Date:
September 08, 2017
Filing Date:
April 12, 2016
Export Citation:
Assignee:
GUANGDONG INST OF ECO-ENVIRONMENTAL SCIENCE & TECH (CN)
International Classes:
C09K17/40; C09K101/00
Domestic Patent References:
| WO2013126477A1 | 2013-08-29 |
Foreign References:
| CN103436265A | 2013-12-11 | |||
| CN104388094A | 2015-03-04 |
Attorney, Agent or Firm:
GUANGZHOU HUAXUE INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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