Goldmann Eryk, Kudlek Edyta, Bialas Oktawian, Górski Marcin, Adamiak Marcin, Klemczak Barbara
Department of Structural Engineering, Faculty of Civil Engineering, Silesian University of Technology, 44-100 Gliwice, Poland.
Department of Water and Wastewater Engineering, Faculty of Energy and Environmental Engineering, Silesian University of Technology, 44-100 Gliwice, Poland.
Materials (Basel). 2025 Mar 6;18(5):1176. doi: 10.3390/ma18051176.
The addition of carbon nanotubes (CNTs) to cement matrix brings multiple beneficial effects ranging from improving mechanical and physical properties to the creation of smart materials. When subjected to an erosive environment or as end-of-life waste, mortars with CNT addition might get released into the environment and come in contact with surface waters. The assessment of the environmental impact of mortars reinforced with carbon nanotubes is an important factor concerning their sustainability, as it has not yet been addressed in the literature. The presented paper aims to assess the water toxicity of cement mortars with various dosages of 0.05 wt.%, 0.1 wt.%, and 0.2 wt.% of carbon nanotube. The effect of the quality of water dispersion of CNTs was also considered through two sonication times of the suspension: 20 min and 60 min. Tests using indicator organisms, , , and , were conducted on shredded and non-shredded mortars. The results reveal no to low toxicity for all tested mortars under the assumed framework of toxicity assessment. The toxicity results for samples containing CNTs were comparable to those without CNTs, indicating that the toxicity of mortars incorporating CNTs is not greater than that of conventional cement-based materials. The water toxicity of the cement mortars is rather connected with the washing away of the hydration products more than with the presence of carbon nanotubes.
在水泥基体中添加碳纳米管（CNTs）会带来多种有益效果，从改善机械和物理性能到创造智能材料。当暴露于侵蚀性环境或作为报废废弃物时，添加了碳纳米管的砂浆可能会释放到环境中并与地表水接触。评估碳纳米管增强砂浆的环境影响是关乎其可持续性的一个重要因素，因为这在文献中尚未得到探讨。本文旨在评估添加了0.05 wt.%、0.1 wt.%和0.2 wt.%不同剂量碳纳米管的水泥砂浆的水毒性。还通过对悬浮液进行20分钟和60分钟的两种超声处理时间来考虑碳纳米管水分散质量的影响。使用指示生物、、和对切碎和未切碎的砂浆进行了测试。结果表明，在假定的毒性评估框架下，所有测试砂浆的毒性均为无至低毒性。含碳纳米管样品的毒性结果与不含碳纳米管的样品相当，这表明掺入碳纳米管的砂浆的毒性不大于传统水泥基材料。水泥砂浆的水毒性与其水化产物的冲走有关，而不是与碳纳米管的存在有关。
