Preparation and application of terpolymer metallic ion adsorbent

Abstract

The invention provides a method for preparing a powdery metallic ion adsorbent and belongs to the technical field of adsorption. The powdery metallic ion adsorbent is prepared from thiosemicarbazide, formaldehyde and urea through a one-step method in an aqueous solution. In the synthesis reaction of terpolymers, the charging ratio of the thiosemicarbazide to the formaldehyde is unchanged, and a series of thiosemicarbazide / formaldehyde / urea terpolymer adsorbents are prepared by changing the charging ratio of the urea. By adding the urea into the reaction system of the thiosemicarbazide and the formaldehyde, the performance of the adsorbent is improved, the hydrophilicity and the adsorptive selectivity of the adsorbent are improved; and moreover, the cost is lowered, and the application and the popularization are facilitated. By measuring the adsorption capacity of a plurality of metallic ions, the results show that the sequence of adsorption capacity of five kinds of metallic ions is Ag (I) >Hg (II) >Cu (II) >Cd (II) >Zn (II). The adsorbent can be used for concentration of noble metallic ions and sewage treatment.

Description

technical field [0001] The invention relates to the preparation of a powder-type metal ion adsorbent, relates to a reaction design and a synthesis method thereof, and belongs to the technical field of adsorption. Background technique [0002] With the development of industrial production and the advancement of science and technology, people inevitably leave a large number of metal ions in waste water after using various metal materials, some of which are expensive and rare, such as Ag + 、Pt 2+ 、Re 2+ 、Au 3+ etc. These metals are important resources and are extremely valuable in industrial production; some metal ions are poisonous, such as Hg 2+ 、Cu 2+ 、C 2+ Wait. If these metal ions are abandoned in wastewater and waste, it will damage the ecology and harm human health. Most heavy metals are toxic to the human body above a certain concentration. The heavy metals mentioned in terms of environmental pollution actually mainly refer to heavy metals with significant biolo...

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Problems solved by technology

For example, heavy metals discharged with wastewater, even if the concentration is small, can accumulate in algae and sediment, be absorbed by the body surface of fish and shellfish, produce food chain concentration, and cause public nuisance

my country's water environment is currently facing two serious problems: the rapid economic development has sharply increased the demand for water, resulting in excessive exploitation of water sources (including groundwater sources), and the shortage of water resources in many places, especially in the vast northern regions, is becoming increasingly serious; at the same time , due to the constraints of economic and technological factors, the urban wastewater treatment rate is still low

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