Mukhopadhyay Soumyadeep, Mukherjee Sumona, Hayyan Adeeb, Hayyan Maan, Hashim Mohd Ali, Sen Gupta Bhaskar
Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
J Contam Hydrol. 2016 Nov;194:17-23. doi: 10.1016/j.jconhyd.2016.09.007. Epub 2016 Sep 20.
Deep eutectic solvents (DESs) are a class of green solvents analogous to ionic liquids, but less costly and easier to prepare. The objective of this study is to remove lead (Pb) from a contaminated soil by using polyol based DESs mixed with a natural surfactant saponin for the first time. The DESs used in this study were prepared by mixing a quaternary ammonium salt choline chloride with polyols e.g. glycerol and ethylene glycol. A natural surfactant saponin obtained from soapnut fruit pericarp, was mixed with DESs to boost their efficiency. The DESs on their own did not perform satisfactory due to higher pH; however, they improved the performance of soapnut by up to 100%. Pb removal from contaminated soil using mixture of 40% DES-Gly and 1% saponin and mixture of 10% DES-Gly and 2% saponin were above 72% XRD and SEM studies did not detect any major corrosion in the soil texture. The environmental friendliness of both DESs and saponin and their affordable costs merit thorough investigation of their potential as soil washing agents.
深共熔溶剂（DESs）是一类类似于离子液体的绿色溶剂，但成本更低且易于制备。本研究的目的是首次使用基于多元醇的DESs与天然表面活性剂皂角苷混合，从受污染土壤中去除铅（Pb）。本研究中使用的DESs是通过将季铵盐氯化胆碱与多元醇（如甘油和乙二醇）混合制备的。从无患子果皮中获得的天然表面活性剂皂角苷与DESs混合以提高其效率。由于pH值较高，DESs本身的效果并不理想；然而，它们将皂角苷的性能提高了多达100%。使用40% DES-甘油和1%皂角苷的混合物以及10% DES-甘油和2%皂角苷的混合物从受污染土壤中去除铅的效率高于72%。X射线衍射（XRD）和扫描电子显微镜（SEM）研究未检测到土壤质地有任何重大腐蚀。DESs和皂角苷的环境友好性及其经济成本值得对它们作为土壤洗涤剂的潜力进行深入研究。
