Synthesis technology of heavy metal adsorbent

Abstract

The invention relates to a synthesis technology of a heavy metal adsorbent. The technology comprises the following steps: stirring a triblock copolymer P123 adopted as a template and ethyl orthosilicate as a silicon source in an acidic medium at room temperature, crystallizing the obtained solution, calculating obtained crystals to synthesize an ordered meso-porous material SBA-15; adding a functional group compound to the SBA-15 to carry out primary modification in order to generate an amino group and / or mercapto group modified SBA-15; and adding a compound which can react with the amino group and / or the mercapto group to the primary modified SBA-15 to carry out secondary modification in order to obtain hydroxyl modified SBA-15. Reaction conditions for synthesizing pure silicon SBA-15 are mild, the reaction is carried out at room temperature, the obtained SBA-15 has thick hole walls, the mechanical stability and the hydrothermal stability of a meso-porous molecular sieve skeleton structure are improved, and the hydroxyl, amino and mercapto modified SBA-15 improves the adsorption effect and the selectivity of heavy metal ions.

Description

technical field [0001] The invention relates to a synthesis process of an adsorbent, in particular to a synthesis process of a novel heavy metal adsorbent. Background technique [0002] Heavy metals have a slow and long-term impact on the human body. Once they enter the human body, their metabolism is very difficult. Therefore, once the human body ingests excessive heavy metal elements, it will erode the health of the body and cause serious harm to the human body. Common heavy metals mainly include cadmium, mercury, lead, arsenic, chromium, aluminum and other elements. Mercury mainly harms the nervous system and damages the brain, causing numbness of the limbs, movement disorders, and visual acuity caused by "mercury encephalopathy". Symptoms such as narrowing and hearing difficulty, severe heart failure and death, severe poisoning may cause oral lesions, nausea, retting, abdominal pain, diarrhea and other symptoms, and may also cause damage to the skin, mucous membranes, ur...

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Problems solved by technology

[0003] In the research and development and production process of pharmaceutical, food and other fields, it is necessary to use heavy metal ion adsorbents to adsorb heavy metals, such as SBA-15, SBA-15 is a mesoporous silica material with a two-dimensional hexagonal columnar structure, and other Compared with mesoporous materials, it has larger pore size (5-30nm), thicker pore wall (3.1-6.4nm) and higher hydrothermal stability, but the chemical reactivity of SBA-15 is not high, and the adsorption of heavy metal ions Low selectivity, small ion exchange capacity, low acid content and strength, which limit its practical application range

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