Layered adsorbent of wastewater containing thiosulfate and treatment method thereof

Abstract

The invention relates to a layered adsorbent of wastewater containing thiosulfate and a treatment method thereof, belonging to the technical field of wastewater treatment. The adsorbent of wastewatercontaining thiosulfate is layered double hydroxides (LDHs) and calcined products (CLDH) thereof, and the chemical formula is [M<2+>[1-x]M<3+>x(OH)2]<x+>(A<n->)x / 2.yH2O. By applying the LDHs and the CLDH to the treatment of wastewater containing thiosulfate, the invention enables the layered double hydroxides recovered after the thiosulfate is absorbed to be regenerated by sodium carbonate or sodium hydroxide or used for other applications such as agricultural sulfur-containing compound fertilizer and the like. The layered adsorbent can be used for recovery and the reclamation of the thiosulfate. The invention has good absorption effect of the thiosulfate and regeneration and recycle or direct reclamation of the adsorbent, and can solve the problem of eutrophia of the thiosulfate to soil and water bodies.

Description

technical field

[0001] The invention belongs to the technical field of water treatment and provides a layered adsorbent and a treatment method for wastewater containing thiosulfate, which are suitable for the treatment of wastewater containing thiosulfate. Background technique

[0002] Thiosulfate is a very important industrial raw material. Thiosulfate is used in industrial projects such as photography, gold and silver smelting, and leather tanning. But at the same time, thiosulfate exists in the form of pollutants in waste water in some industries. For example, there are about 40-180 g / L of thiosulfate in the coking desulfurization waste liquid of coking plants. Textile printing and dyeing industry, Thiosulfate also exists in the wastewater discharged from electroplating industry and organic synthesis industry. Finding a reasonable way to remove and recycle thiosulfate in wastewater will not only bring environmental benefits, but also economic benefits. At present, the m...