Imidazolium based ionic liquids (ILs) have been extensively used in the various industrial fields, however, the dependence of their structure on toxicity and bioavailability by plants is not clear. Thus, in this study, uptake of imidazolium based ILs with different alkyl chain lengths (e.g., [C₂mim]⁺ and [C₈mim]⁺) by ryegrass and their toxicity to plant growth were investigated. Results show that the two ILs could be removed by ryegrass with high efficiencies, and a higher uptake efficiency and accumulation was observed for [C₂mim]⁺ with shorter chain length compared with that for [C₈mim]⁺. A higher growth inhibition of ryegrass by [C₈mim]⁺ was observed compared with that by [C₂mim]⁺, indicating the long alkyl chain length of ILs had a negative effect on the plant growth. ILs taken up by ryegrass was retained in the roots and their translocation from roots to shoots was restricted. The IL concentration in roots was 0.68 mg/g-fresh weight for [C₂mim]⁺ and 0.08 mg/g- fresh weight for [C₈mim]⁺ when the ryegrass was exposed to 10 mg/L ILs. This study proved that plant assimilation of ILs depended on their alky chain lengths, which would be useful for understanding the fate of ILs with various structures in phytoremediation for ILs-contaminated water.

咪唑基离子液体（ILs）已广泛用于各种工业领域，但是，其结构对植物毒性和生物利用度的依赖性尚不清楚。因此，在这项研究中，研究了黑麦草对具有不同烷基链长度（例如[C ₂ mim] ⁺和[C ₈ mim] ⁺）的咪唑类ILs的吸收及其对植物生长的毒性。结果表明，黑麦草可高效去除两个IL，与[C ₈ mim] ⁺相比，链长较短的[C ₂ mim] ⁺观察到更高的吸收效率和积累。。黑麦草的较高生长抑制[C _8个MIM] ⁺观察与由[C相比_2个MIM] ⁺，表明离子液体的长烷基链长度对植物生长具有负面影响。黑麦草吸收的IL被保留在根中，并且它们从根到芽的转运受到限制。根的IL浓度对于[C ₂ mim] ⁺为0.68 mg / g-鲜重，对于[C ₈ mim] ⁺为0.08 mg / g-鲜重。当黑麦草暴露于10 mg / L ILs时。这项研究证明，IL的植物同化取决于它们的烷基链长度，这对于了解受ILs污染的水进行植物修复的各种结构的IL的去向是有用的。