Department of Environmental Engineering

ZHAO, Huazhang

ZHAO, Huazhang

Associate Professor
Department: Environmental Engineering
Research interests: Water and wastewater treatment
Tel/fax: 86-10-62754292, ext. 815 / 86-10-62756526


Ph.D., Environmental Engineering, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 2003
M.S., Environmental Engineering, Shandong University, 2000 
B.S., Environmental Engineering, China University of Petroleum, 1995


2007-present, Associate Professor, Peking University
2005-2007, Lecturer, Peking University
2003-2005, Postdoc Research Fellow, Tsinghua University


Undergraduate course: Water Treatment Engineering (I)
Graduates: Process Chemistry for Water and Wastewater Treatment



Technology and material for water and wastewater treatment


1. Zhao H.Z., Peng J.X., Lin S.S., Zhang Y. Covalently bound organic silicate aluminum hybrid coagulants: preparation, characterization and coagulation behavior. Environmental Science & Technology, 43(6): 2041-2046, 2009.
2. Zhao H.Z., Zhao B., Yang W., Li T.H. Effects of Ca2+ and Mg2+ on defluoridation in the electrocoagulation process. Environmental Science & Technology, 44(23): 9112-9116, 2010.
3. Zhao H.Z., Zhang Y., Zhao B., Chang Y.Y., Li Z.S. Electrochemical reduction of carbon dioxide in an MFC-MEC system with a layer-by-layer self-assembly carbon nanotube/cobalt phthalocyanine modified electrode. Environmental Science & Technology, 46(9): 5198-5204, 2012.
4. Zhao H.Z., Zhang Y., Chang Y.Y., Li Z.S. Conversion of a substrate carbon source to formic acid for CO2 emission reduction utilizing series-stacked microbial fuel cells. Journal of Power Sources, 217: 59-64, 2012.
5. Sun J.J., Zhao H.Z.*, Yang Q.Z., Song J., Xue A. A novel layer-by-layer self-assembled carbon nanotube-based anode: Preparation, characterization, and application in microbial fuel cell. Electrochimica Acta, 55(9): 3041-3047, 2010
6. Zhao H.Z., Sun J.J., Song J., Yang Q.Z. Direct electron transfer and conformational change of glucose oxidase on carbon nanotube-based electrodes. Carbon, 48(5): 1508-1514, 2010.
7. Zhao B., Zhao H.Z.*, Dockko S., Ni J.R. Arsenate removal from simulated groundwater with a Donnan dialyzer. Journal of Hazardous Materials, 215-216: 159-165, 2012.
8. Zhao H.Z., Yang W., Zhu J., Ni J.R. Defluoridation of drinking water by combined electrocoagulation: Effects of the molar ratio of alkalinity and fluoride to Al (III). Chemosphere, 74(10): 1391-1395, 2009.
9. Zhao H.Z., Liu C., Xu Y., Ni J.R. High-concentration polyaluminum chloride: Preparation and effects of the Al concentration on the distribution and transformation of Al species. Chemical Engineering Journal, 155(1-2): 528-533, 2009.
10. Yang Q.Z., Chang Y.Y., Zhao H.Z.* Preparation and antibacterial activity of lysozyme and layered double hydroxide nanocomposites. Water Research, DOI information: 10.1016/j.watres.2013.09.002.


1. Zhao H.Z., Peng J.X., Sun J.J. A method for preparation of covalently bound inorganic-organic flocculants, Patent Number: ZL 200810115990.8.
2. Zhao H.Z., Peng J.X., Sun J.J. The preparation process and application of organic silicate aluminum hybrid flocculants, Patent Number: ZL 200810115989.5.
3. Zhao H.Z., Yang W., Ni J.R. Combined electrocoagulation process for defluoridation and its application, Patent Number: ZL 200810240043.1.
4. Zhao H.Z., Zhao B., Ni J.R. The selective membrane for synchronous adsorption and desorption: apparatus, method, and application, Patent Number: ZL 200810240044.6.
5. Zhao H.Z., Xu Z.K., Chen P., Ni J.R., A method for high-efficient treatment of yellow ginger processing waste water, Patent Number: ZL 200510132060.X.
6. Zhao H.Z., Jiang Z.P., Yang H.W., Shi S.Q. A method for separation and determination of low concentration dissolved/colloid aluminum in water, Patent Number: ZL 200410042534.7.


1. New Century Excellent Talent in University of Ministry of Education of China, 2010.
2. P&G prize for excellent teacher, Peking University, 2008.
3. Nova of Beijing Science and Technology, 2007.
4. “High-concentration Ammonium Wastewater Treatment by Immobilized Microorganism”, the first-prize of Science and Technology Progress of Education, Ministry of Education, 2007.
5. “High-efficient and Multi-functional Organic Polymer Flocculant”, Science and Technology Development Award, Science and Technology Development Award Committee of Shandong Province, 2002.
6. “High-efficient and Multi-functional Organic Polymer Flocculant”, Award for Excellent Scientific Researcher of Colleges and Universities, Shandong Education Office, 2001.



It is difficult to efficiently remove certain new pollutants from water by flocculation. In the past 15 years, Dr. Zhao has been focusing on an exploration of efficient flocculants and flocculation process by developing the species and structure regulation methods and probing process mechanisms based on analyzing the structure-activity relationship. Three kinds of species and structure regulation methods for flocculants–namely ethanol-acetone fractional precipitation, organic silicone modification, and covalently bound for inorganic and organic components – have been proposed. An efficient species of polyaluminum chloride – Al13 – solid with a purity higher than 99%, and the organosilicone modified poly (diallyldimethyl ammonium chloride) (PDADMAC) have been obtained, which can enhance the colloidal pollutant removal. The industrial production of PDADMAC series flocculants has been realized. The covalently bonded organic-inorganic composite flocculants have also been obtained and used for dissolved organic matters removal, which alter the traditional opinion that flocculants are ineffective in removing the dissolved low-molecular weight organic matters. Regarding the in-situ flocculation based on electrochemistry, the mechanisms of “defluoridation by the formation of layered double hydroxide” and “defluoridation by direct anode attachment” have been revealed, and the coupling principle of “nascent” iron species and electrochemistry for pollutant removal has been proven. He has been responsible for more than 10 projects including National Natural Science Foundation. He has published 82 journal articles, in which 39 are SCI papers (as the first or the corresponding author in 22 papers), among which 5 papers are published on Environmental Science & Technology. The SCI papers are cited by others for 400 times. He has gained 9 authorized invention patents, 3 provincial and ministerial science and technology awards (placed 3, 3 and 8, respectively). In the following years, he will engage himself in the research on the construction and the flocculation mechanism of flocculants aiming at the removal of new pollutants.