1. An Y, Zhang R, Yuan S, Jin H, Wang G, Pei X, Liu Y (2016) Health risk assessment of heavy metals in farmland soil in Hebei Province. Occup Health 32(9):1252–1255
2. Chen S (2014). Spatiotemporal modeling of heavy metal pollution in soil and its environmental risk warning. Dissertation, Central South University
3. Li Y (2011). Experimental study on emission and high-temperature control of trace elements during coal gasification. Dissertation, Huazhong University of Science and Technology
4. Li Y, Yu T, Li Y, Zhao Z (2014). Analysis of prediction model of soil heavy metal. In: Academic annual meeting of China Society of Environmental Science
5. Liang P, Li CX, Qin YC, Hu B, Jiang ZC (2000) Selective adsorption on nanometer size TiO2 powders for the chromium speciation using ICP-AES. J Anal Sci 16(4):300–303