Treatment method for water of molybdenum-containing water source
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A treatment method, water source water technology, applied in the direction of adsorption water/sewage treatment, neutralized water/sewage treatment, reduced water/sewage treatment, etc., can solve the problems of high cost and poor treatment effect, and achieve low cost and high adsorption capacity Strong, large specific surface area effect
Active Publication Date: 2014-03-12
HARBIN INST OF TECH
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[0005] The purpose of the present invention is to provide a treatment method for molybdenum-containing source water in order to solve the problem of high cost or poor treatment effect of the existing molybdenum-containing source water
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specific Embodiment approach 1
[0022] Specific implementation mode one: the treatment method of molybdenum-containing source water in this embodiment is implemented according to the following steps:
[0023] 1. Add divalent iron salt and oxidant to the molybdenum-containing water to obtain the dosing water;
[0024] 2. Dosing water flows into the coagulation tank, adding acid and alkali agents to control the pH of the system between 3 and 10 for coagulation treatment;
[0025] 3. After the coagulation is completed, it will be treated by sedimentation and filtration to complete the treatment of molybdenum-containing source water;
[0026] Wherein the ferrous salt described in step 1 is one or more in ferrous chloride, ferrous sulfate, ferrous nitrate and ferrous perchlorate; Oxidant is potassium permanganate, sodium permanganate, chlorine One or more of , ozone or hydrogen peroxide.
[0027] In this embodiment, the ferrous ions are oxidized in situ to ferric ions by the oxidant, and the ferric ions are hyd...
specific Embodiment approach 2
[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that when the oxidant is potassium permanganate or sodium permanganate, the ferrous salt and oxidant described in step 1 have a molar ratio (2.5-4): 1 Add to molybdenum-containing water. Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that when the oxidizing agent is chlorine, ozone or hydrogen peroxide, the molar ratio (1.6-2.4) of ferrous salt and oxidizing agent described in step 1: 1 Add to molybdenum-containing water. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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Abstract
The invention relates to a treatment method for water of a molybdenum-containing water source and aims to solve the problem of an existing treatment method for the water of the molybdenum-containing water source that the cost is high or the treatment effect is poor. The treatment method comprises the following steps: adding a ferrous salt and an oxidant into the molybdenum-containing water or adding a hexavalent iron salt or a reducing agent; or directly adding a ferric salt to obtain medicine-added water; then controlling the pH (Potential of Hydrogen) value of a system in a coagulating tank and carrying out coagulation treatment; and finally, precipitating and filtering to finish the treatment of the water of the molybdenum-containing water source. According to the treatment method, the added iron salts are conventional reagents and the cost is low; nascent state nano iron oxide (hydroxide) generated by oxidization, reduction methods and the like in situ has the characteristics of small grain diameter, large specific surface area and strong adsorption capability, and has positive charges on the surface; the nascent state nano iron oxide (hydroxide) has excellent adsorption and removing effects on molybdenum existing in a form of an oxygen-containing acid radical with negative charges.
Description
technical field [0001] The invention relates to a treatment method for source water containing molybdenum, in particular to a water treatment method for absorbing and removing molybdenum in water by adopting in-situ generation of new ecological nano-iron oxides (hydroxides). Background technique [0002] Molybdenum is a transition metal element with seven valence states of -2, +1, +2, +3, +4, +5, +6, with +6 valence (molybdate, MoO 6 2- ) for its stable valence. Molybdenum is mainly used in the iron and steel industry and can be used to produce special steel. It is also an important material in the electronic industry, and its application in other alloy fields and chemical fields is also expanding. Excessive intake of molybdenum by the human body will affect the metabolism of copper, calcium, and phosphorus in the body, resulting in bone metabolism disorders, causing children to suffer from rickets and rickets; too much molybdenum content will also increase the amount of s...
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