MATeng-chong,LIGui-wei,CHENQi,et al.Microbial Oxidation, Deposition and Release Characteristics of Manganese on Surfaces of Diverse Pipe Materials[J].China Water & Wastewater,2024,40(19):52-57.
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Microbial Oxidation, Deposition and Release Characteristics of Manganese on Surfaces of Diverse Pipe Materials

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第19期 Page: 52-57 Column: Date of publication: 2024-10-01
Author(s):
MA　Teng-chong1; 2;  LI　Gui-wei2;  CHEN　Qi2;  WANG　Yi-li1;  HOU　Jia-hao2;  ZHANG　Yao2; 3;  SHI　Bao-you2; 3
（1. College of Environmental Science and Engineering， Beijing Forestry University， Beijing 100083， China； 2. Key Laboratory of Drinking Water Science and Technology， Research Center for Eco-Environmental Sciences， Chinese Academy of Sciences， Beijing 100085， China； 3. University of Chinese Academy of Sciences， Beijing 100049， China）
Keywords:
manganese deposition;  manganese release;  pipe materials;  microbial manganese oxidation
Abstract:
The accumulation and re-release of manganese oxides constitute an important cause of the yellow water issue in the water distribution network. In regions where the disinfectant concentration is low within the pipeline, manganese oxidizing bacteria can oxidize the residual Mn(Ⅱ) in the product water into particulate manganese oxide (MnOx), thereby causing manganese deposition on the inner wall of the pipeline. The characteristics of oxidation, deposition, and release of manganese on the surfaces of various pipe materials including stainless steel, concrete, polyvinyl chloride (PVC), and polyethylene (PE) under the influence of microorganisms were explored using undisinfected post-filtration water from an actual water treatment plant. The 142-day duct piece deposition experiment indicated that the microbial oxidation process of Mn(Ⅱ) was categorized into three stages. It took approximately 50 days to commence, and accelerated during the period from the 51st to the 120th day. Subsequently, the added Mn(Ⅱ) was completely oxidized. The species of manganese oxidizing bacteria on the surface of diverse duct pieces were analogous, and no conspicuous disparity was witnessed in their abundance. Nevertheless, the quantity of manganese deposits on the surface of concrete segments exhibited a marked dissimilarity. The manganese deposits on the surface of concrete segments were the highest, reaching (160.84±28.02) mg/m2 (P<0.01), while those on the surface of stainless steel, PVC, and PE segments were (46.82±12.04) mg/m2, (47.08±12.88) mg/m2, and (49.80±5.38) mg/m2, respectively. Under hydraulic disturbance, the relative release amount of manganese deposits on the surface of different materials in descending order was stainless steel, PE, PVC and concrete.
Last Update: 2024-10-01