4[1]Andrey B, Teresa J B, 2002. H2 S adsorption on materials obtained using sulfuric acid activation of sewage sludge-derived fertilizer[J]. Journal of Collid and Interface Science, 252: 188-194.
5[2]Bacaoui A, Yaacoubi A, Dahbi A, 2001. Optimization of conditions for the preparation of activated carbons from olive-waste cakes [ J ]. Carbon, 39:425-432.
6[3]Box G, Hunter W G, Hunter J S, 1978. Statics for experimenters, an introduction to design, data analysis and model building [ M ]. New York:Wiley. 306-604.
7[4]Chen X G, Jeyaseelan S, Graham N, 2002. Phyical and chemical properties study of the activated carbon made from sewage sludge [ J ]. Waste Management, 22: 755-760.
9[6]Inguanzo M, Domingguez A, Blanco C G, 2002. On the pyrolysis of sewage sludge: the influence of conditions on solid, liquid and gas fractions [ J ].Journal of Analytical and Applied Pyrolysis, 63: 209-222.
10[7]Myers R H, Montgomery D C, 1995. Response suface methodology: process and product optimization using designed experiments [ M ]. New York: John Wiley & Sons.