Variation and removal efficiency of assimilable organic carbon (AOC) in an advanced water treatment system

Lou, Jie-Chung; Chen, Bi-Hsiang; Chang, Tien‐Chien; Hu, Yang; Han, Jianqiao

doi:10.1007/s10661-010-1673-3

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…In addition, petroleum substances that might leak from an underground shearer will not readily dissolve in water due to their small polarity. When an emulsi er with a polar micelle hydraulic support is added to the in uent, the solute molecules are wrapped and positioned in a lipophilic core of the micelle because the solute molecules have an a nity for the nonpolar tail of the normal micelle phase; then, a stable boundary lm is formed on the oil-water interface (Lou et al 2011). Conventional physical methods cannot break the boundary membrane between oil and water, resulting in the continuous accumulation of oil molecules throughout the life cycle of the mine water (Soonglerdsongpha et al 2011).…”

Section: Dom Stripping Rulesmentioning

confidence: 99%

Study on the occurrence characteristics and removal of DOM based on the mine water treatment station

Dong

Yang

Huang

2022

Preprint

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In order to find out the status of organic pollutants in coal mine area of Ordos Basin in northwest China, we used an excitation emission matrix combined with parallel factor analysis to study the compositional characteristics and fluorescence intensity of dissolved organic matter (DOM) in mine water. In this way, we found that the DOM in the Mongolia-Shaanxi border mining area of Ordos Basin has four main components: two that resemble fulvic acid (C1/C3), a protein-like tryptophan substance (C2), and a protein-like tyrosine substance (C4). The fluorescence intensity of the fulvic acid-like component increased from 334.73 a.u to 440.33 a.u after treatment, and the fluorescence intensity of the protein-like tyrosine-component decreased from 330.18 a.u to 295.78 a.u. And then we investigated the removal efficiency of DOM and other pollution in the Caojiatan mine water treatment plant’s coagulation - filter – ultrafiltration process. In this process, the removal efficiency of the protein-like tryptophan components reaches 90%, while that of chemical oxygen demand / NO2− and the total organic carbon is about 50%. The removal efficiency of the Cu2+ and F−is less than 30%, and almost none of the protein-like tyrosine components, electrical conductivity, total dissolved solids, and NH4+. Thus, It’s proved that aliphatic hydrocarbons such as alkanes and cycloalkanes in mine water were removed in the treatment process, whereas macromolecular aromatic hydrocarbons and other groups were not removed. In the end, we put forward the ozone air flotation process, ozone effect makes the water of oxygen functional groups such as carboxyl, hydroxyl content increased, allowing more of the aluminum, iron, magnesium, and calcium ion complexing, precipitation, leading to desorption from the particulate organic matter, reduce the space steric hindrance and electrostatic repulsion, the effect of enhanced coagulation, Promote the condensation of particulate matter by means of adsorption bridge. This provides theoretical support for research on the source and fate of the carbon trajectory in the water cycle in a coal mine area and provides guidance on the removal of DOM from mine water.

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Section: Dom Stripping Rulesmentioning

confidence: 99%