20.500.12556/RUL-138851 Simultaneous removal of arsenic and toxic metals from contaminated soil laboratory development and pilot scale demonstration Soil chemistry of toxic metalloids and metals differs, making their simultaneous removal difficult. Soil contaminated with As, Pb, Zn and Cd was washed with oxalic acid, Na-dithionite and EDTA solution. Toxic elements were removed from the washing solution by alkalinisation with CaO to a pH 12.5: As was co-precipitated with Fe from Fe-EDTA chelate formed after the soil washing. The toxic metals precipitated after substitution of their EDTA chelates with Ca. The novel method was scaled up on the ReSoil® platform. On average, 60, 76, 29, and 53% of As, Pb, Zn, and Cd were removed, no wastewater was generated and EDTA was recycled. Addition of zero-valent iron reduced the toxic elements’ leachability. Remediation was most effective for As: phytoaccessibility (CaCl$_2$ extraction), mobility (NH$_4$NO$_3$), and accessibility from human gastric and gastrointestinal phases were reduced 22, 104, 6, and 51 times, respectively. Remediation increased pH but had no effect on soil functioning assessed by fluorescein diacetate hydrolysis, dehydrogenase, β-glucosidase, urease, acid and alkaline phosphatase activities. Brassica napus produced 1.9 times more biomass on remediated soil, accumulated no As and 5.0, 2.6, and 9.0 times less Pb, Zn and Cd, respectively. We demonstrated the novel remediation technology as cost-efficient (material cost = 41.86 € t$^{−1}$) and sustainable. heavy metals soil washing hazard mitigation soil functioning sustainable remediation toksični elementi remediacija tal čiščenje tal težke kovine pranje tal trajnostna sanacija sanacija tal true false true Angleški jezik Slovenski jezik Članek v reviji 2022-08-23 11:46:44 2022-08-23 11:46:45 2022-09-15 04:17:17 0000-00-00 00:00:00 2022 0 0 12 str. art. 118656 Vol. 294 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 502/504 0269-7491 10.1016/j.envpol.2021.118656 88795907 1-s2.0-S0269749121022387-main.pdf 1-s2.0-S0269749121022387-main.pdf 1 CFDC98ED770D96A5B7C60E423E1055E0 423713ed2a9770d023d07c81c430f24556c1759485c229dab7167e87a0842fa8 454efbae-22c9-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159321 https://www.sciencedirect.com/science/article/pii/S0269749121022387 0 0a67b689-22c9-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159320 Biotehniška fakulteta 0 0 0