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首页> 外文期刊>Journal of Residuals Science & Technology >Integration of Solid Residues from the Steel and Pulp and Paper Industries for Forest Soil Amendment
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Integration of Solid Residues from the Steel and Pulp and Paper Industries for Forest Soil Amendment

机译：钢铁，纸浆和造纸工业中的固体残留物用于森林土壤改良的整合

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摘要

Beneficial utilisation of process industry residues provides possibilities to reduce energy consumption, to avoid environmental impacts caused by increasing landfilling and promotes sustainable management of natural resources. As traditional utilisation of steel industry residues lies within the realm of civil construction, complementary applications could be found from the integration with pulp and paper industry residues to promote sustainable forest management through forest soil amendment. In our study we show that three different soil amendment matrices, providing slow release and materials handling advantages, were successfully produced according to conventional cement testing practices. The concepts we develop for forest soil amendment incorporate the use of fly ash in tandem with granulated blast furnace or steel slag as binder materials, the utilisation of paper mill sludge as reactive aggregate and the use of green liquor dregs and lime waste from chemical pulping as alkaline components. The neutralising (35.8–38.6%) and reactivity (33.3–38.0%) values (expressed as Ca-equivalents d.w.) with supporting high pH-values (12.9–13.0) indicate liming and buffering capacities of the test matrix materials are comparable to commercial ground limestone products. Additionally, concentrations of Ca, K and Mg and concentrations of Cu, Mn and Zn were found to be higher than organic and mineral soils normally found in the Ostrobothnia region of Northern Finland. Only under severe leaching test conditions (HNO3 and HCl microwave digestion) did the total concentration of Cr in the soil amendment matrix exceed respective Finnish statutory limit value set for the use of fertilisers in forestry. However, as illustrated by the leaching procedure, less than a fifth of the total Cr is likely to become mobile in conditions normally found in nature.
机译：有益地利用加工业残渣可以减少能源消耗，避免由于填埋而造成的环境影响，并促进自然资源的可持续管理。由于钢铁工业残余物的传统利用属于民用建筑领域，因此与纸浆和造纸工业残余物的整合可以发现互补的应用，以通过森林土壤改良促进可持续森林管理。在我们的研究中，我们表明，根据常规水泥测试实践，成功生产了三种不同的土壤改良剂基质，具有缓释和材料处理的优势。我们为森林土壤改良开发的概念包括使用粉煤灰与颗粒状高炉或钢渣串联作为粘合剂材料，利用造纸厂污泥作为反应性骨料以及使用化学制浆中的绿液渣和石灰废料。碱性成分。具有支持高pH值（12.9–13.0）的中和值（35.8–38.6％）和反应性（33.3–38.0％）值（表示为Ca当量dw）表明，测试基质材料的石灰和缓冲能力可与商用地面石灰石产品。此外，发现钙，钾和镁的浓度以及铜，锰和锌的浓度高于芬兰北部Ostrobothnia地区通常发现的有机和矿物土壤。仅在严格的浸出试验条件下（HNO3和HCl微波消解），土壤改良剂基质中Cr的总浓度才超过芬兰针对林业使用肥料设定的法定法定限值。但是，如浸出程序所示，在自然界通常发现的条件下，总铬中不到五分之一可能会变成可移动的。

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