Coagulation efficiency and mechanism of hydrated manganese dioxide - Details

Author：

Yang, Yan-Ling (Yang, Yan-Ling.) (Scholars：杨艳玲) | Li, Xing (Li, Xing.) (Scholars：李星) | Yang, Wei (Yang, Wei.) | Jia, Feng (Jia, Feng.) | Zhao, Fu-Wang (Zhao, Fu-Wang.)

Indexed by：

EI Scopus PKU CSCD

Abstract：

Hydrated　manganese　oxide　(MnO)　is　prepared　with　potassium　permanganate　and　sodium　subsulfite.　Interface　performance,　charge　property　and　structure　topography　of　MnO　are　investigated.　Turbidity　and　organic　matters　removal　efficiency　by　coagulation,　and　coagulation　mechanism　of　MnO　are　approached.　Results　show　that　the　zero　charge　point　of　the　MnO　particles　is　about　1.8　of　pH　value　(pHPZC)　in　pure　water.　MnO　contains　with　rich　hydroxyl　with　specific　surface　area　of　131.59m2·g-1.　MnO　shows　extremely　strong　adsorption　action　and　chemical　adsorption　activity,　and　structure　topography　for　easy　adsorption　bridging　action.　MnO　is　provided　with　better　turbidity　and　organic　matters　removal　efficiency　by　coagulation.　Turbidity　and　TOC　removal　rate　of　the　settled　water　are　77.94%　and　49.15%　respectively.　MnO　is　provided　with　remarkable　filtration　aid　action.　The　filtered　water　turbidity　can　be　decreased　below　0.01NTU　under　lower　MnO　dosage　of　4mg·L-1.　The　main　mechanism　of　coagulation　for　turbidity　and　organic　matters　removal　is　the　actions　of　adsorption　bridging　and　enmeshment　rolling　sweeping.

Keyword：

Efficiency Adsorption Potash Chemical water treatment Manganese oxide Manganese removal (water treatment) Biogeochemistry Turbidity Potable water Topography Hydration Coagulation Organic compounds Oxides

Author Community：

[ 1 ] [Yang, Yan-Ling]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Li, Xing]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Yang, Wei]Department of Environment Engineering, Harbin University of Commerce, Harbin, Heilongjiang 150076, China
[ 4 ] [Jia, Feng]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Zhao, Fu-Wang]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China