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Search Results (2)

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Keywords = desorbed pollutants disposal

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29 pages, 10210 KiB  
Article
Sustainable Solutions for Pollutants Removal with a Hybrid Multifunctional Adsorbent Based on Recycled Expanded Glass
by Ali Abdussalam Almazoug, Slavko Mijatov, Marija M. Vuksanović, Milutin Milosavljević, Asifa Jasim Mohammed Mohammed, Milena D. Milošević, Aleksandar Marinković and Mirjana Bartula
Appl. Sci. 2025, 15(6), 3093; https://doi.org/10.3390/app15063093 - 12 Mar 2025
Viewed by 879
Abstract
The removal of the As(V) and Iprodione fungicide onto EGS@APTES-GT, obtained by amino-modified expanded glass spheres (EGS) modified with goethite, was studied in this work. Material characterization was performed using SEM/EDS, XRD, and FTIR techniques. The adsorption capacities of 51.01 and 94.28 mg [...] Read more.
The removal of the As(V) and Iprodione fungicide onto EGS@APTES-GT, obtained by amino-modified expanded glass spheres (EGS) modified with goethite, was studied in this work. Material characterization was performed using SEM/EDS, XRD, and FTIR techniques. The adsorption capacities of 51.01 and 94.28 mg g−1, for As(V) and Iprodione removal at 25 °C, respectively, were achieved. A kinetic study indicated lower intraparticle diffusional transport resistance. Physisorption is the dominant mechanism for Iprodione removal, while surface complexation is for As(V). The disposal of effluent water after five adsorption–desorption cycles was attained through Iprodione photocatalytic degradation and arsenate precipitation. Exhausted EGS@APTES-GT, processed by goethite acidic dissolution and grinding, was used as a reinforcing filler in composites production based on commercial unsaturated polyester resin (UPe). An improvement in the mechanical properties was observed, with a gradual increase in the tensile strength, reaching a maximum of 25.9% for UPe with 10 wt.% of ground exhausted adsorbent compared to pure UPe. The overarching concept is defined by the aspiration to develop technologies that address all output flows of advanced processes. Thus, the combination of wastewater treatment technologies and the production of potentially marketable composites successfully achieved both a low environmental impact and the implementation of a circular economy. Full article
(This article belongs to the Section Green Sustainable Science and Technology)
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11 pages, 1691 KiB  
Article
Pre-Drying of Chlorine–Organic-Contaminated Soil in a Rotary Dryer for Energy Efficient Thermal Remediation
by Rui Chai, Jinqing Wang, Mingxiu Zhan, Dingkun Yuan, Zuohe Chi, Hailin Gu and Jiani Mao
Int. J. Environ. Res. Public Health 2022, 19(24), 16607; https://doi.org/10.3390/ijerph192416607 - 10 Dec 2022
Cited by 3 | Viewed by 1958
Abstract
In response to the current problem of the high energy consumption of direct thermal desorption systems when treating soils with a high moisture content, we propose using the waste heat of the system to pre-dry soil to reduce its moisture. Taking chlorine–organic-contaminated soil [...] Read more.
In response to the current problem of the high energy consumption of direct thermal desorption systems when treating soils with a high moisture content, we propose using the waste heat of the system to pre-dry soil to reduce its moisture. Taking chlorine–organic-contaminated soil as an object, an experimental study on the drying and pollutant desorption characteristics of soil in an indirect rotary dryer was carried out. The results show that the non-isothermal drying process was divided into warm-up and falling rate periods, and no constant period was observed. The higher the rotation speed, the lower the soil outlet temperature and the higher the drying tail gas temperature. Soil outlet and dry tail gas temperatures were lower for soils with a higher moisture content. Benzene and cis-1,2-dichloroethylene are easily desorbed. Therefore, the disposal of dry tail gas should be determined according to the type and concentration of soil pollutants present. The volumetric heat transfer coefficient was found to be 85–100 W m−3 °C−1, which provides a key parameter for the size design of a rotary dryer. Full article
(This article belongs to the Special Issue Air Pollution Control, Solid Waste Treatment, and Environmental Catalysis)
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