[1]马腾冲,李贵伟,陈祺,等.不同管材表面锰的微生物氧化沉积与释放特征[J].中国给水排水,2024,40(19):52-57.
　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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不同管材表面锰的微生物氧化沉积与释放特征

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第19期 页码: 52-57 栏目: 出版日期: 2024-10-01
Title:
Microbial Oxidation, Deposition and Release Characteristics of Manganese on Surfaces of Diverse Pipe Materials
作者:
马腾冲1,2， 李贵伟2， 陈祺2， 王毅力1， 侯加豪2， 张堯2,3， 石宝友2,3
（1.北京林业大学 环境科学与工程学院，北京 100083；2.中国科学院生态环境研究中心 饮用水科学与技术重点实验室，北京 100085；3.中国科学院大学，北京 100049）
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）
关键词:
锰沉积;  锰释放;  管材;  微生物氧化锰
Keywords:
manganese deposition;  manganese release;  pipe materials;  microbial manganese oxidation
摘要:
锰氧化物的累积与再释放是导致给水管网黄水问题的一个重要原因。在管道中消毒剂浓度较低的区域，锰氧化细菌能将出厂水中的残余Mn（Ⅱ）氧化成颗粒态锰氧化物（MnOx），致使锰沉积在管道内壁。使用实际给水厂中未消毒的滤后水探究微生物作用主导下不同管材［不锈钢、混凝土、聚氯乙烯（PVC）、聚乙烯（PE）］表面锰的氧化沉积和释放特征。142 d的管片沉积实验表明，Mn（Ⅱ）的微生物氧化过程分为三个阶段，启动需约50 d，第51~120天开始加速，其后投加的Mn（Ⅱ）被完全氧化。不同材质管片表面锰氧化菌的种类相似且丰度无明显区别，但锰沉积物的量差异较大，混凝土管片表面积累的锰沉积物最多，为（160.84±28.02） mg/m2（P<0.01），不锈钢、PVC、PE管片表面锰沉积量分别为（46.82±12.04）、（47.08±12.88）、（49.80±5.38） mg/m2。在水力扰动条件下，不同材质管片表面锰沉积物相对释放量排序为不锈钢>PE>PVC>混凝土。
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.
更新日期/Last Update: 2024-10-01