Geoecological Analysis of Threats of Using Phosphogypsum in Construction of Roads

IF 0.4 Q4 GEOSCIENCES, MULTIDISCIPLINARY
O. Krainiuk, Y. Buts, R. Ponomarenko, V. Asotskyi, V. Barbashyn, Andrii Y. Kalynovskyi
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引用次数: 0

Abstract

The problem of recycling and storage of phosphogypsum is relevant for many coun- tries of the world, as it is associated with environmental problems such as pollution of water bodies, soil and atmosphere. This study analyzes the possibility of using phosphogypsum for the construction of roads. The objective was a geoecological analysis of the danger of phos-phogypsum stockpiles and a study of the possibility of using phosphogypsum in road construction to solve the problem of its accumulation in the environment. The chemical composition of phosphogypsum samples of the Sumyhimprom and Rivneazot companies was studied using the method of X-ray diffractometry. The content of heavy metals (HM) was analyzed using atomic absorption spectros-copy. An extremely high level of chromium was determined, accounting for more than 20-33 Maximum Concentration Values (MCV). The content of cuprum in the phosphogypsum samples of Rivneazot was 2 MCVs. The contents of other heavy metals did not exceed the MCVs, the synergistic effect should be taken into account. Migration of heavy metals is one of the main problems associated with phosphogypsum stockpiles. The increased acidity of phosphogypsum promotes the formation of soluble HM compounds. Depending on the solubility of toxicants, they accumulate in the ecosystem or migrate, dissolve, and enter plants. The traditional methods of storing phosphogypsum, both from an environmental and economic points of view, are less acceptable than the methods of its recycling and reuse in various sectors of the national economy. The paper theoretically substantiates that the reuse of accumulated phosphogypsum and the implementation of new technological solutions in road construction would reduce the level of technogenic loading that phos- phogypsum imposes on the environment. Based on the analysis of the content of heavy metals and the development of concentration logarithmic diagrams, mobile forms of metals were studied and the harmful effect of metals leaching from phosphogypsum was considered. We determined the positions of toxic substances in the engineering road construction – environment. We recommended dividing hydroxides and hydroxocomplexes of heavy and toxic metals into three groups according to their solubility, having the ability to migrate in acidic, neutral and alkaline environments, respectively. Strict regulations are needed to protect soil cover in areas with acidic soils. We grouped soils on which it is not recommended to use engineered road structures with phosphohypsum due to increased migration of HMs into the ecosystem: sandy; soils rich in humus components, acidic soils (sod-podzolic) or in case of existing proba- bility of an increase in soil acidity (unorganized ingress of industrial waste, acid rain, etc.); acidic soils salinized with chlorides; soils containing ammonia; soils containing sulfates.
磷石膏在道路建设中的地质生态威胁分析
磷石膏的回收和储存问题与世界上许多国家有关,因为它与水体、土壤和大气污染等环境问题有关。本研究分析了磷石膏用于道路建设的可能性。目的是对磷-磷石膏库存的危险进行地质生态学分析,并研究在道路建设中使用磷石膏以解决其在环境中积累问题的可能性。用x射线衍射法研究了Sumyhimprom和Rivneazot公司磷石膏样品的化学成分。采用原子吸收光谱法对样品中重金属(HM)含量进行了分析。铬含量极高,超过20-33个最大浓度值(MCV)。Rivneazot磷石膏样品中铜的含量为2 mcv。其他重金属含量未超过mcv,应考虑协同效应。重金属的迁移是与磷石膏库存相关的主要问题之一。磷石膏酸度的增加促进了可溶性HM化合物的形成。根据毒物的溶解度,它们在生态系统中积累或迁移、溶解并进入植物。从环境和经济的角度来看,磷石膏的传统储存方法不如其在国民经济各部门的回收和再利用方法更令人难以接受。本文从理论上论证了磷石膏的再利用和新技术方案在道路建设中的实施将降低磷石膏对环境的技术负荷水平。通过对磷石膏中重金属含量的分析和浓度对数图的编制,研究了磷石膏中金属的流动形态,并对磷石膏中金属浸出的危害进行了探讨。确定了工程道路施工环境中有毒物质的位置。我们建议将重金属和有毒金属的氢氧化物和氢氧配合物根据其溶解度分为三组,分别在酸性、中性和碱性环境中具有迁移能力。在酸性土壤地区,需要严格的规定来保护土壤覆盖。我们将由于土壤微生物向生态系统的迁移增加而不建议使用磷质工程道路结构的土壤分类为:沙质;富含腐殖质成分的土壤、酸性土壤(灰化土)或存在土壤酸度增加可能性的土壤(工业废物、酸雨等的无组织进入);用氯化物盐化的酸性土壤;含氨土壤;含硫酸盐的土壤。
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来源期刊
Journal of Geology Geography and Geoecology
Journal of Geology Geography and Geoecology GEOSCIENCES, MULTIDISCIPLINARY-
自引率
40.00%
发文量
57
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