生物炭吸附性能的影响因素及其在土壤中的应用

Influencing factors of biochar adsorption properties and its application in soil

生物炭是通过高温热解处理制得的一种固体炭质材料,主要由碳元素组成,具有坚固、稳定和高孔隙度的特点。目前,生物炭可应用于水体中重金属和有机污染物的治理,以及土壤pH调节、土壤改良、碳封存、污染治理和农业生产增效等方面。本文综述了影响生物炭吸附性能的因素,以及生物炭在土壤中的应用,并对其在土壤中更加合理的应用做出展望。影响生物炭吸附性能的主要因素包括原料种类、热解温度、热解时间、pH、使用剂量和改性方法等。生物炭在土壤中的应用主要包括改善土壤理化性质、吸附土壤中重金属和有机物污染物、提供营养元素和促进植株生长等。

Biochar is a kind of solid carbon material produced by high temperature pyrolysis,mainly composed of carbon elements.It possesses characteristics of being sturdy,stable,and having high porosity.Currently,biochar can be applied to the treatment of heavy metals and organic pollutants in water bodies,as well as in soil for purposes including pH regulation,soil improvement,carbon sequestration,pollution control,and enhancement of agricultural production.The factors affecting the adsorption performance of biochar and the application of biochar in soil were reviewed,and the more reasonable application of biochar in soil was prospected.The main factors affecting the adsorption properties of biochar include raw material type,pyrolysis temperature,pyrolysis time,pH,dosage and modification methods.The application of biochar in soil mainly includes improving the physical and chemical properties of soil,adsorption of heavy metals and organic pollutants in soil,provide nutrients and promote plant growth,etc.