Characterization of coal bio ash from wood pellets and low-alkali coal fly ash and use as partial cement replacement in mortar

Sigvardsen, Nina Marie; Ottosen, Lisbeth M.

doi:10.1016/j.cemconcomp.2018.10.005

Cited by 47 publications

(14 citation statements)

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“…The predominant crystalline phase in LKD was calcite (CaCO 3 ) (Markgraf and Reeder, 1985), accompanied by smaller quantities of quartz (SiO 2 ) (Levien et al, 1980) and calcium hydroxide (Ca(OH) 2 ) (Desgranges et al, 1993). Interestingly, the main crystalline phase in BA was CaO (Carevic et al, 2019; Liodakis et al, 2005; Sigvardsen and Ottosen, 2019) with notable peaks due to the CaSiO 3 (Bajare et al, 2011). The results of XRD patterns in biofuel ash granules (BAG) are given in Figure 5(b).…”

Section: Resultsmentioning

confidence: 99%

Granulated biofuel ash as a sustainable source of plant nutrients

et al. 2020

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Recovery of nutrients from biomass combustion ash is of great importance for sustainable bioenergy waste use. In this work, granulated fertilizer materials were engineered from biofuel bottom ash, lime kiln dust and water, analysed for their chemical complexity and tested in pot experiments (2017–2018) for their propensity to release nutrients. The results obtained in this work showed that spring barley yield was observed to be the highest for granulated biomass ash with 30% of ash in the granule. The yield increased 3.99 t ha−1 per 100 kg ha−1 potassium oxide (K2O) in 2017 and 1.23 t ha−1 per 100 kg ha−1 K2O in 2018. Straw yield varied between 1.39–5.08 t ha−1/100 kg ha−1 in 2017 and 0.36–1.23 t ha−1/100 kg ha−1 in 2018. Calcium concentration significantly increased in soil. No significant changes in soil mobile phosphorus (P) were obtained as well as for the heavy metal concentrations in soil. This suggests that biofuel ash can be a significant source of certain major nutrients for crops that can also beneficially affect soil pH. The results of this work can provide policy-makers with the information needed to diversify existing and enable new biomass bottom ash utilization routes which currently vary significantly between the countries.

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Section: Resultsmentioning

confidence: 99%

Granulated biofuel ash as a sustainable source of plant nutrients

et al. 2020

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“…Exposure of heavy metals from coal combustion and high-temperature processes in the industry will release harmful particles (gas, dust, and metals) [14]. Cement dust has a significant correlation with health outcomes.…”

Section: Skin Diseasementioning

confidence: 99%

Heavy Metal Contributions on Human Skin Disease near Cement Plant: A Systematic Review

Rauf

Mallongi

Astuti

2020

Open Access Maced J Med Sci

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AIM: The aim of this systematic review was to investigate heavy metal roles at skin disease of humans in the cement industrial area. METHODS: All research reporting a specific heavy metal, which could be increasing the risk of the disease, cause cement induced to skin. Fourteen selected articles from our inclusion criteria rated using eight quality-appraisal criteria derived from Strengthening the Reporting of Observational Studies in Epidemiology checklist and following preferred reporting items for systematic reviews and meta-analyses methodology. RESULTS: We performed a systematic review of published articles between 2009 and 2019 from ten case–control, two cohort, one ecological study, and one cross-sectional study showed the heterogeneity of the study design. The studies are focusing on the relationship between heavy metal and skin disease that appeared in cement plant areas such as dermatitis, skin cancer, eczema, and other allergies. Chromium, nickel, cobalt, zinc, cadmium, mercury may present and play an important role for human skin disease. CONCLUSION: Heavy metals have been found in the skin of human living and work around the cement industry. Chromium, cobalt, and nickel are almost certainly present in every case of dermatitis and eczema. Signs and mild symptoms of skin disease include redness, itching, starch, and dryness. Elements such as cadmium, lead, and mercury usually are found in chronic skin disease (psoriasis and skin cancer) on a biologic test. These findings should raise an important concern and recommendation policy for controlling raw materials contains heavy metal in cement industrial areas and proper protection for workers and non-worker.

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“…A technology to cope with these problems has been recently proposed by burning wood biomass (pellets, chips and sawdust) in the presence of low-alkali CFA (≤4 wt%). 20 The by-product of this combustion process has been referred to coal bio ash (CBA). Notably, it has been demonstrated that CBA is a better substitute for cement compared to CFA.…”

Section: Introductionmentioning

confidence: 99%