Modified cinder adsorbent and preparing method and application
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An adsorbent and modification technology, applied in chemical instruments and methods, adsorption water/sewage treatment, silicate, etc., can solve environmental burden and other problems, achieve high adsorption efficiency, good effect, and reduce environmental burden
Inactive Publication Date: 2016-12-14
TIANJIN UNIV
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But after the reaction finishes, produce a large amount of high aluminosilicate (38-51%) content, the solid lignite slag of high carbon (20-30%) content, cause very big burden to environment
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Embodiment 1
[0022] A preparation method of a modified coal slag adsorbent, comprising the steps of:
[0023] 1) The lignite slag is washed with water, dried, mixed with pyrite slag equivalent to 0.1 times the quality of the dried lignite slag, and pulverized; particles between 60-100 mesh are taken;
[0024] 2) According to the ratio of 100g:400mL, immerse the mixture obtained in step 1) in the aqueous hydrochloric acid solution with pH=1, acidify and modify for 16 hours; stir once every 30min during the acidify and modify; filter, recover the filtrate, The solid was washed with water, dried, put into a muffle furnace, and roasted at 450° C. for 50 minutes to obtain a modified cinder adsorbent (sample 1).
Embodiment 2
[0026] A preparation method of a modified coal slag adsorbent, comprising the steps of:
[0027] 1) The lignite slag is washed with water, dried, mixed with pyrite slag equivalent to 0.1 times the quality of the dried lignite slag, and pulverized; particles between 60-100 mesh are taken;
[0028] 2) According to the ratio of 100g:400mL, immerse the mixture obtained in step 1) in the sulfuric acid aqueous solution with pH=1, acidify and modify for 16h; stir once every 30min during the acidify and modify; filter, recover the filtrate, The solid was washed with water, dried, put into a muffle furnace, and roasted at 450°C for 50 minutes to obtain a modified cinder adsorbent (sample 2)
Embodiment 3
[0030] A preparation method of a modified coal slag adsorbent, comprising the steps of:
[0031] 1) washing lignite slag with water, drying, mixing with pyrite slag equivalent to 0.15 times the quality of dried lignite slag, pulverizing, and getting particles between 50-70 mesh;
[0032] 2) According to the ratio of 100g: 300mL, soak the mixture obtained in step 1) in the aqueous solution of nitric acid with pH=1.5, acidify and modify it for 20h; stir once every 20min; filter, recover the filtrate, wash the solid with water, dry, put into a muffle furnace and roasted at 500°C for 30 minutes to obtain a modified coal slag adsorbent. (sample 3)
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Abstract
The invention discloses modified cinder adsorbent and a preparing method and application. The preparing method includes the steps that 1, ignite cinder is washed, dried and mixed with pyrite cinder, and the mixture is smashed; 2, the mixture obtained in the step 1 is soaked in inorganic acid water solution and is treated in a acidification modification mode; the solution is filtered, filter liquor is recovered, solid is washed with water, dried and calcinated to obtain the modified cinder adsorbent. The ignite cinder and pyrite cinder are used for preparing the modified cinder adsorbent which is uniform in particle size distribution and high in dispersity; the modified cinder adsorbent is high in adsorbability to heavy metal ions in waste liquid, high in adsorption efficiency and capable of being used for treating heavy metal in multiple kinds of industrial waste water and has the advantages of being easy to operate, low in cost and good in effect; the ignite cinder and pyrite cinder are residue waste. The two kinds of raw materials are wide in source, cheap and easy to obtain, are used for preparing the modified cinder adsorbent and have obvious price advantages. The adoption of the ignite cinder and pyrite cinder belongs to recycle of solid waste, and the environment burden is greatly reduced.
Description
technical field [0001] The invention relates to the field of adsorbents, in particular to a modified coal slag adsorbent and a preparation method. Background technique [0002] Heavy metals are common environmental pollutants. Accumulation of heavy metals in a certain concentration in water will cause serious harm to aquatic animals and plants, and may directly or indirectly affect human health through the food chain. Therefore, the treatment of heavy metal ion wastewater has always been a hot spot in the research of sewage treatment. [0003] Lignite is a low-quality coal with high water content, and its combustion produces little energy, so it is not suitable for conventional coal gasification or combustion for power generation. Therefore, the supercritical gasification process can be used for gas production, and direct gasification without drying can produce usable gas. However, after the reaction is finished, a large amount of solid lignite slag with high aluminosilica...
Claims
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