Gasifier slag and humic acid-modified produced soil conditioner and soil improvement and remediation application thereof

Abstract

The invention discloses a gasifier slag and humic acid-modified produced soil conditioner and soil improvement and remediation application thereof. Firstly, when gasifier slag and / or ash is crushed, ahumid acid substance with a mixing ratio of a humid acid substance to heavy metal equal to (3 to 40) to 1 is added for in-situ reduction, passivation and curing, and ageing is conducted for more than24 hours to obtain detoxified gasifier slag and / or ash; secondly, the detoxified gasifier slag and / or ash is loaded with 1%-20% of biological bacterial fertilizer to obtain slag bacterial fertilizer;thirdly, when degraded soil is subjected to improvement and remediation, humid acid and the slag bacterial fertilizer are evenly thrown at soil surface separately, and through a rotary cultivator, even mixing is conducted.

Description

1. Technical field [0001] The humic acid modification production soil conditioner of gasification slag and its soil improvement and restoration application provided by the invention relate to the resourceful treatment of inorganic solid waste, in particular to the harmless and resourceful treatment of coal gasification slag. 2. Background technology [0002] For example, Shenhua Ningxia Coal Group consumes about 37 million tons of coal annually and produces about 4.8 million tons of gasification slag and ash (dry slag). The long-distance transportation is not cost-effective, and a large amount of gasification slag has to be landfilled for a fee. On the one hand, the environmental protection benefits are poor, and a huge landfill fee of about 230 million yuan needs to be paid, which is a heavy burden for the enterprise; May cause surface and groundwater pollution and affect human health. Therefore, it is urgent to carry out research on the comprehensive utilization technolo...

AI Technical Summary

Problems solved by technology

However, since the gasification slag and ash also contain trace harmful elements such as As, Cd, Cr, Ni, Pb, Ba, Hg, Co, Se, Ag, Be, etc., the gradually accumulated Pollution elements may cause soil, water and biological pollution, forming a potential hazard to the biological chain, thus restricting the application of gasification slag and ash in agricultural soil restoration and conditioning improvement