Specific treatment method for wastewater containing heavy metal ions

Abstract

The invention discloses a specific treatment method for wastewater containing heavy metal ions. The specific treatment method is realized by adding a heavy metal ion specific adsorbent into the wastewater. The heavy metal ion specific adsorbent is obtained by modifying functional molecules capable of specifically interacting with ions such as Cu < 2 + >, Fe < 2 + >, Fe < 3 + > and Hg < 2 + > on bacterial cellulose. According to the method, specific functional molecules are modified in a bacterial cellulose three-dimensional network, and specific soft acid-soft alkali interaction is scientifically utilized, so that different functional molecules and different types of heavy metal ions are subjected to specific interaction, and the purpose of specifically and deeply purifying the heavy metal ions in water is achieved; after treatment, the content of heavy metal ions serving as an adsorption target is lower than 0.10 ppm, and the problems that in the prior art, an adsorption material is weak in heavy metal ion combining capacity and lack of specific ion removing capacity are fundamentally solved.

Description

technical field [0001] The invention belongs to the technical field of industrial organic wastewater treatment, and in particular relates to a specific treatment method for wastewater containing heavy metal ions and a specific adsorbent used therefor. Background technique [0002] The demand and quality of water in the fields of industry, agriculture, energy and municipal administration are getting higher and higher, and the freshwater resources in nature are extremely limited, which makes people continue to try to explore new sources of clean water. The researchers noticed that the huge presence of industrial and agricultural wastewater, brackish water and seawater provides the potential for the acquisition of clean water. However, such water often contains heavy metal ions such as copper ions, iron ions, ferrous ions and lead ions, which not only makes these water sources unreasonable, but may even pose a threat to human health. For example, the accumulation of excess iro...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a specific treatment method for wastewater containing heavy metal ions, which can quickly, efficiently and deeply Cu in purified water 2+ , Fe 2+ , Fe 3+ and Hg 2+ and other specific ions; the adsorbent used to achieve specific treatment chooses bacterial cellulose as the adsorption matrix, taking advantage of its unique properties such as ultra-high specific surface area, three-dimensional network structure, strong affinity and rich modifiable groups, which significantly improves The adsorption capacity of the adsorbent for heavy metal ions, and it can be recycled and reused conveniently; the scientific use of specific soft acid-soft base interaction, by modifying specific functional molecules in the three-dimensional network of bacterial cellulose, it can be combined with Cu 2+ , Fe 2+ , Fe 3+ and Hg 2+ Waiting for different ions to interact specifically to achieve the purpose of specifically separating ions

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