Method for removing pollutants from water by using action of biochar strengthened oxidant
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A technology of biochar and oxidant, applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of poor removal effect and low removal efficiency of organic matter, improve adsorption performance and strengthen oxidation effect. , the effect of increasing the specific surface area
Inactive Publication Date: 2019-07-16
HARBIN INST OF TECH
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[0006] The purpose of the present invention is to solve the problem of poor removal effect and low removal efficiency of total organic matter when the oxidants commonly used in water treatment, ferrate, permanganate, ozone and persulfate, are used to treat pollutants in water, and provide a biological A Method of Removing Pollutants in Water by Strengthening the Action of Oxidant with Carbon
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specific Embodiment approach 1
[0017] Specific embodiment one: In this embodiment, the method for removing pollutants in water by using biochar to strengthen the action of oxidant is realized according to the following steps:
[0018] 1. Add biochar to the water to be treated to obtain water containing biochar;
[0019] 2. (Quickly) stir the water body containing biochar, and add an oxidant to react at the same time;
[0020] 3. After the reaction is finished, filter the treated water body to complete the removal of pollutants in the water body;
[0021] Wherein said oxidizing agent is ferrate, permanganate, ozone or persulfate.
[0022] In this embodiment, after the biochar reacts with the oxidant, a variety of metastable oxides with stronger reactivity are produced, including reacting with ferrate to produce intermediate iron, reacting with permanganate to produce intermediate manganese, and reacting with ozone Generate singlet oxygen and hydroxyl radicals, etc., and react with persulfate to generate si...
specific Embodiment approach 2
[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the water to be treated in Step 1 is drinking surface water, drinking ground water, domestic sewage or industrial wastewater.
specific Embodiment approach 3
[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the pollutants in the water to be treated are trace (persistent) organic pollutants, humic acid organic pollutants, fulvic acid organic pollutants, protein organic pollutants or heavy metal pollutants.
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Abstract
The invention discloses a method for removing pollutants from water by using action of a biochar strengthened oxidant and relates to water treatment methods. The method is used for solving the problems that when oxidants frequently-used for water treatment at present, i.e., ferrate, permanganate, ozone and persulfate are applied to treatment on the pollutants in the water, the removal effect is poor, and the efficiency of removal of total organic matters is low. The method for removing the pollutants from the water comprises the steps: (1) adding biochar into the water to be treated, so as toobtain biochar containing water; (2) stirring the biochar containing water, and meanwhile, adding an oxidant for a reaction; and (3) filtering the treated water after the reaction ends up, thereby completing removal of the pollutants from the water. According to the method, based on a strengthened oxidation action and improved adsorption performance, after a combined action of the biochar and theoxidant, the rate of removal of typical organic pollutants from untreated water can reach 90% or more, the removal rate of TOC can reach 50% or more, or the content of COD in sewage can be lowered by60% to 90%.
Description
technical field [0001] The invention relates to a water treatment method, in particular to a method for removing pollutants in water by using biochar to strengthen the action of an oxidant. Background technique [0002] Ferrate, permanganate, ozone and persulfate all have a certain selectivity when reacting with organic matter, and can only selectively oxidize some organic pollutants (containing electron-rich groups) when removing organic pollutants in water bodies. ). For example, ferrate is more reactive with organic compounds containing sulfur and nitrogen groups, and permanganate tends to react with phenolic organic compounds. Moreover, when these oxides oxidize and degrade organic matter, most of them only change the structure and molecular weight, and the degree of mineralization is not high. This characteristic limits the application of these oxidants in the control of organic pollutants, so it is necessary to develop methods to enhance the ability of these oxidants...
Claims
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