Opole University of Technology, Prószkowska 76 Street, 45-758, Opole, Poland.
Environ Monit Assess. 2022 Aug 16;194(10):671. doi: 10.1007/s10661-022-10320-4.
The microbiological activity of three types of landfilled foundry wastes, i.e. biologically reclaimed foundry waste (BFW), foundry waste landfilled since the 1990s (LFW) and fresh foundry waste (FFW), was investigated. The wastes originated from a Polish iron and steel foundry which uses organic binders based on phenol-formaldehyde resins and mineral binders to casting production. The physical and chemical properties and dehydrogenase activity (DHA) were determined in the waste samples and local soils. In addition, a pot experiment was performed to determine the effect of the addition of FFW with no microbial activity on soils. Additional correlation analysis was conducted between DHA and other parameters. It was found that biologically reclaimed foundry waste (BFW) showed the highest microbial activity, similar to soils from garden allotments and agricultural fields. The DHA in LFW was about a half lower than BFW. On the other hand, FFW did not show any microbial activity. A pot experiment showed that increasing the percentage of foundry waste relative to soil had a negative effect on DHA, probably as a result of soil dilution rather than the inhibitory effect of contaminants. It was concluded that the optimum addition of FFW to soils is 10% wt, due to the highest value of DHA among the other variants.
研究了三种类型的填埋铸造废物的微生物活性，即生物回收的铸造废物（BFW）、20 世纪 90 年代以来填埋的铸造废物（LFW）和新鲜的铸造废物（FFW）。这些废物来自于一家波兰的钢铁铸造厂，该铸造厂使用基于酚醛树脂的有机粘合剂和矿物粘合剂来进行铸件生产。在废物样本和当地土壤中测定了物理化学性质和脱氢酶活性（DHA）。此外，还进行了盆栽实验以确定没有微生物活性的 FFW 对土壤的影响。还对 DHA 与其他参数之间的相关性进行了分析。结果表明，生物回收的铸造废物（BFW）表现出最高的微生物活性，类似于花园分配地和农田的土壤。LFW 中的 DHA 比 BFW 低约一半。另一方面，FFW 没有显示出任何微生物活性。盆栽实验表明，随着铸造废物相对于土壤的百分比增加，DHA 呈下降趋势，这可能是由于土壤稀释而不是污染物的抑制作用。结论是，由于其他变体中 DHA 的含量最高，FFW 最佳的土壤添加量为 10%wt。
