劉教授的主要研究領域為環境工程，分離程序。目前進行之研究題目包括：

水及廢水之物理化學處理程序

1. 半導體業與光電業廢水處理與回收
2. 藻類分離技術

含稀有金屬的污泥與電子廢棄物

1. 稀有金屬自電子污泥之釋出行為
2. 自電子廢棄物回收稀有金屬

1. Luong, H.V. T. and J.C. Liu*, “Flotation separation of soluble and colloidal indium from aqueous solution”, Ind. Eng Chem. Res., Vol. 53, 1242-1248 (2014).

    

2. Kurniawati, A., H, S. Ismadji and J.C. Liu* “Microalgae harvesting by flotation using natural saponin and chitosan” Bioresource Technol. Vol. 132, 115-119 (2014).

    

3. Budyanto, S., Y.L. Kuo, and J.C. Liu*, “Adsorption and precipitation of fluoride on calcite nanoparticles: A spectroscopic study”, Sep. Purif. Technol., Vol. 150, 325-331 (2015).

    

4. Lee, M.T., C.W. Li, and J.C. Liu*, “Recovery of fluoride as perovskite-like minerals from industrial wastewater”, Sep. Purif. Technol., Vol. 156, 1057-1063 (2015).

    

5. Chen, J.Y., H.V.T. Luong, and J.C. Liu*, “Fractionation and release behaviors of metals (In, Mo, Sr) from industrial sludge”, Water Res., Vol. 82, 86-93 (2015).