Phytoextraction of uranium from contaminated soil by Macleaya cordata before and after application of EDDS and CA

• Published in: Environmental science and pollution research international Vol. 22; no. 8; pp. 6155 - 6163
• Main Authors: Li, Chang-wu, Hu, Nan, Ding, De-xin, Hu, Jin-song, Li, Guang-yue, Wang, Yong-dong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.04.2015; Springer Berlin Heidelberg; Springer Nature B.V
• Subjects: Acidic soils; Acids; application rate; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Biodegradation, Environmental; calcium; Carbon; Catalysis; Chelates; Chelating Agents - chemistry; Citric acid; Citric Acid - chemistry; College campuses; Contamination; Dissolved organic carbon; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Ethylenediamines - chemistry; greenhouse soils; Iron; Macleaya; Macleaya cordata; Manganese; Moisture content; Nitrates; Organic soils; Papaveraceae - metabolism; phytoremediation; polluted soils; Research Article; Seeds; Shoots; Soil; Soil (material); Soil contamination; Soil Pollutants - chemistry; Soil pollution; Soil solution; Solubility; Succinates - chemistry; Uptakes; Uranium; Uranium - chemistry; Uranium - pharmacokinetics; Waste Water Technology; Water Management; Water Pollution Control; China; [S,S]-Ethylenediaminedisuccinic acid; Uranium; Soil solution; Phytoextraction; Citric acid
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-014-3803-x

This is the first report on using Macleaya cordata for phytoextraction of uranium from the uranium contaminated soil in the greenhouse. Macleaya M. cordata was found to increase uranium concentration in the soil solution by increasing the dissolved organic carbon (DOC). The amendment experiments with citric acid (CA) and [S,S]-ethylenediamine disuccinic acid (EDDS) at the rates of 1.0, 2.5, 5.0, and 10.0 mmol kg⁻¹dry weight (DW) soil showed that EDDS was more efficient to increase uranium concentration in the shoot than CA when they were applied at the same rate. The applications of 5.0 mmol kg⁻¹EDDS and 10.0 mmol kg⁻¹CA were most appropriate for increasing uranium concentrations in the shoot of M. cordata. CA was more efficient to increase the solubility of uranium at the same application rates except for 2.5 mmol kg⁻¹application rate. There was a linear correlation between the uranium concentration in the shoot and the average uranium concentration of one planted pot during 14 days in soil solution after the application of different rates of EDDS and CA, respectively (r² = 0.972, P < 0.01; r² = 0.948, P < 0.01), indicating that uranium uptake was dependent on the soluble uranium concentration. The Fe-U-DOC and Mn-U-DOC complexes were probably formed after the application of CA. Soil solution pH and Fe, Mn, Ca, and DOC concentrations in soil solution were found to be changed by the chelates.