title: Response to the Commentary on "Arsenic mobility in the arsenic-contaminated Yangzonghai Lake in China".
abstract: This is the response to "Commentary on 'Arsenic mobility in the arsenic-contaminated Yangzonghai Lake in China' by Changliang Yang et al. [Ecotoxicology and Environmental Safety, 107(2014)321-327]" (by Jing Chen et al.). To doubts and questions raised by Chen et al., we give further explanations and provide more relevant evidences. The water temperature stratification existed in Lake Yangzonghai in summer, and affected by which arsenic concentration with water depth was uneven and peaked in the bottom layer in summer. In the case of adding carbon source (glucose) and maintaining anerobic state, enhanced microbial activity promoted the release of arsenic from sediment to water which was observed in the laboratory experiments. Errors might exist in sampling, determination and calculation, but they would not change the main conclusions of the article.
authors.affiliation: Engineering Technology Institute, Yunnan University, Kunming 650091, Yunnan Province, PR China.
authors.forename: Shiyu
authors.initials: S
authors.lastname: Li
authors.affiliation: Engineering Technology Institute, Yunnan University, Kunming 650091, Yunnan Province, PR China. Electronic address: YANGCL227@163.com.
authors.forename: Changliang
authors.initials: C
authors.lastname: Yang
authors.affiliation: School of Life Science, Yunnan University, Kunming 650091, Yunnan Province, PR China.
authors.forename: Kai
authors.initials: K
authors.lastname: Liu
mesh_terms: D001151:Arsenic / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: Arsenic distribution; Arsenic release; Microorganism; Sediment; Stratification