钛石膏土壤化利用的安全风险及前景分析

Safety risk and prospect analysis of titanium gypsum on soil utilization

目前,钛石膏的资源化利用率不足10%,缺乏可大规模消纳的应用领域,而土壤化可能是一个重要的方向。提出将钛石膏作为土壤化的资源利用途径,分析其作为土壤资源化利用时面临的安全性问题,探究其用作土壤的基本性质及安全风险。通过浸出毒性对钛石膏进行安全风险评价,分析其理化性质及在土壤利用方面的可行性,以及通过内梅罗指数(P)等方法探究其土壤风险与营养性。研究结果表明,钛石膏的理化性质适宜将其作为土壤母质进一步资源化利用,在国家农用土与绿化土标准规定的8种重金属限制范围内没有严重的环境风险,但钒等部分重金属含量超出了绿化用有机基质的标准,可能成为新的污染物。鉴于以上结果,可以考虑在经过营养性等改良、排除重金属污染风险后,作为土壤化进行资源化利用。为钛石膏资源化利用作土壤资源,进而实现大规模消纳提供了参考。

Up to now,the resource utilization rate of titanium gypsum is less than 10%,and there is no application field that can be consumed on a large scale,and soilization may be an important direction.In this paper,titanium gypsum was proposed as a soil resource,and the safety problems faced by it as a soil resource utilization were analyzed,and the basic properties and safety risks of it as soil were explored.The safety risk of titanium gypsum was evaluated by leaching toxicity,its physicochemical properties and feasibility in soil utilization were also analyzed,and its soil risk and nutritivity were investigated by Nemero index(P).The results show that the physical and chemical properties of titanium gypsum are suitable for further resource utilization as soil parent material,and there is no serious environmental risk within the limit range of 8 heavy metals stipulated in the national agricultural soil and green soil standards.However,the content of heavy metals such as vanadium exceeds the standard of organic substrates used in greening and may become new pollutants.In view of the above results,it can be considered as a soil resource utilization after the nutritional improvement and the elimination of heavy metal pollution risk.This study provides a reference for the utilization of titanium gypsum as soil resources and the direction of large-scale consumption.