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1. (WO2017147979) METHOD FOR PREPARING IRON SILICON SULFUR MULTI-ELEMENT COMPOSITE BIOCHAR SOIL HEAVY METAL CONDITIONER

Pub. No.:    WO/2017/147979    International Application No.:    PCT/CN2016/079110
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Apr 13 01:59:59 CEST 2016
IPC: C09K 17/40
C09K 101/00
Applicants: GUANGDONG INSTITUTE OF ECO-ENVIRONMENTAL SCIENCE & TECHNOLOGY
广东省生态环境与土壤研究所(广东省土壤科学博物馆)
Inventors: LIU, Chuanping
刘传平
LI, Fangbai
李芳柏
WANG, Xiangqin
王向琴
Title: METHOD FOR PREPARING IRON SILICON SULFUR MULTI-ELEMENT COMPOSITE BIOCHAR SOIL HEAVY METAL CONDITIONER
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.