Feasibility of Chinese cabbage (Brassica bara) and lettuce (Lactuca sativa) cultivation in heavily metals−contaminated soil after washing with biodegradable chelators

Abstract

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Removal of Chromium from a Contaminated Soil Using Oxalic Acid, Citric Acid, and Hydrochloric Acid: Dynamics, Mechanisms, and Concomitant Removal of Non-Targeted Metals

“…After leaching by OX, the weight percentages of Al, Fe, Na, and Mg significantly decreased, while those of Ca and K were much higher than in original soil, indicating that OX has good retention effects on Ca and K. The elements Ca and K are not only essential for plant nutrition but are also important for maintenance of healthy soil structure [41,42]. Therefore, OX may be more environment-friendly than CA and HCl for soil washing, which is of great importance for subsequent applications of the remediated soil in plant growth and production [43].…”

Effect of multiple washing operations on removal of heavy metals from an alkaline farmland soil and the strategy for agricultural reuse

“…The speciation of heavy metals in soil samples was sequentially extracted according to Tessier et al (1979). The available concentrations of heavy metals in soil were assessed by chemical extraction method using 1M ammonium acetate solution (Wang et al 2018b). The plant samples (0.5 g aboveground part, or 0.1 g underground part) were digested with HNO 3 /H 2 O 2 (5:2 v/v) (Hu et al 2014).…”

“…After digestion, the solution was ltered through 0.45-μm lters and diluted with deionized water. The concentrations of heavy metals in plant were determined by AAS (Wang et al 2018b).…”

Screening of Heavy Metal-Immobilizing Bacteria and Its Effect on Reducing Cd2+ and Pb2+ Concentrations in Water Spinach (Ipomoea aquatic Forsk.)

“…Excessive Cd 2+ and Pb 2+ accumulation in water spinach can reduce yields and cause potential threats to human health through the food chain [6][7][8]. Therefore, to ensure the safety of agricultural products, it is urgent that we carry out the bioremediation of farmland to remove medium and light heavy metals exceeding standard levels [9,10].…”