title: 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].
abstract: This commentary concerns some inaccuracy in recently published paper "Arsenic mobility in the arsenic-contaminated Yangzonghai Lake in China". Yang et al. raised an incorrect conclusion that after treatment with FeCl3 using the flocculation method, the sediments in the Yangzonghai Lake released As in the summer. The fundamental flaws of the paper which led to the incorrect conclusion were unreasonable sampling method for determining As concentration at various water depth and the wrong lake water volume of 6.04×10(8)m(3) (actually 4.8×10(8)m(3)) for calculating inventory of As in Yangzhonghai in August 2012. Then the authors attribute the As release in summer to the high concentration of HCO3(-) without any support of experimental data. Meanwhile, the authors designed a microbiological experiment to illustrate that increasing capacity of anaerobic microorganism could lead to As releasing from sediments. In our view point, this microbiological experiment was nonsense for evaluating the stability of As in sediments of Yangzonghai lake since the experimental conditions were greatly different from the natural conditions. Therefore, we conclude that the conclusions put forward by YANG are incorrect.
authors.affiliation: School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China. Electronic address: chjing626@yeah.net.
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.affiliation: School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
authors.forename: Shixiong
authors.initials: S
authors.lastname: Wang
authors.affiliation: School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
authors.forename: Xiangjun
authors.initials: X
authors.lastname: Yang
authors.affiliation: School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
authors.forename: Zhangjie
authors.initials: Z
authors.lastname: Huang
authors.affiliation: School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
authors.forename: Fengzhi
authors.initials: F
authors.lastname: Jiang
authors.affiliation: School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan Province, PR China.
authors.forename: Qunyan
authors.initials: Q
authors.lastname: Wei
mesh_terms: D001151:Arsenic / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: Arsenic mobility; Arsenic removal; Ferric chloride; Flocculation method; Yangzonghai Lake