Effects of Cd(II) on wastewater biological nitrogen and phosphorus removal》.pdfVIP

Chemosphere 117 (2014) 27–32 Contents lists available at ScienceDirect Chemosphere journal homepage: www.elsevier .com/locate/chemosphere Technical Note Effects of Cd(II) on wastewater biological nitrogen and phosphorus removal Hong-bo Chen, Dong-bo Wang ⇑, Xiao-ming Li ⇑, Qi Yang, Kun Luo, Guang-ming Zeng, Mao-lin Tang College of Environmental Science and Engineering, Hunan University, Changsha 410082, China Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China h i g h l i g h t s g r a p h i c a l a b s t r a c t Mechanisms for Cd(II) affecting the This study showed the long-term exposure to 10 mg L1 Cd(II) inhibited nitification and phosphorus biological treatment processes were uptake by decreasing the abundance of NOBs and PAOs and the activities of NOR and PPK. not well defined. Short-term exposure to Cd(II) did no affect biological nutrient removal. Long-term exposure to 10 mg L1 Cd (II) decreased NOBs and PAOs abundance. NOBs were more sensitive to Cd(II) than AOBs. Long-term exposure to Cd(II) inhibited NOR and PPK activities. a r t i c l e i n f o a b s t r a c t Article history: Short-term and long-term effects of Cd(II) on wastewater biological nitrogen and phosphorus removal Received 13 March 2014 were investigated with respect to microorganism abundances, enzyme activities, and polyhydroxyalk- Received in revised form 19 May 2014 anoates (PHAs) and glycogen trans