Method for adsorption and removal of heavy metals and dye of waste water by garlic waste

Abstract

The invention discloses a method for adsorption and removal of heavy metals and dye of waste water by garlic waste. The method provided by the invention comprises the following steps of washing a certain amount of garlic waste by water; mixing the washed garlic waste, one or more alkalis and water by stirring for 12 to 24 hours according to a mass ratio of 1: (0.05 to 0.2): (0.5 to 2) for a reaction, filtering to obtain a solid product, washing the solid product by water until the solid product has a pH value of 7, feeding the washed solid product into a vacuum baking oven, drying at a temperature of 60 to 120 DEG C, carrying out fragmentation and screening, collecting particles below 40 meshes, wherein the particles below 40 meshes are utilized as adsorbents, preparing a heavy metal ion or dye molecule aqueous solution having concentration of 0.1 to 10mmol / L, adding a certain amount of the adsorbents into the heavy metal ion or dye molecule aqueous solution according to a volume ratio of 0.5 to 10g / L, and shaking the mixed solution obtained by the previous step at a room temperature for 0.5 to 24 hours so that the adsorbents can fully adsorb heavy metal ions or dye molecules of the heavy metal ion or dye molecule aqueous solution. The method provided by the invention has a reasonable design and simple processes, realizes obvious effects, greatly reduces a treatment cost, wherein the treatment cost of the method is 10 to 15% of that of the traditional treatment method, greatly shortens a treatment period, does not produce secondary pollution after adsorption treatment, andcan be operated and popularized easily.

Description

technical field [0001] The invention relates to a preparation method of a garlic waste adsorbent material, which is used for deep purification of heavy metal ions and dye molecules in water. Background technique [0002] In recent years, environmental pollution caused by heavy metals and dye wastewater has increasingly threatened people's life, health and life safety. Although the traditional purification treatment methods, such as precipitation and flocculation, are simple to operate, they often need to consume a large amount of chemical reagents, and after purification, secondary waste residues containing toxic heavy metals or dye components will be produced, and the purification effect of wastewater with extremely dilute concentrations at the ppm level is insufficient. The shortcomings such as good; activated carbon adsorption or ion exchange resin purification have the disadvantages of high cost and easy failure; although membrane separation, electrodialysis and other ...

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Problems solved by technology

A large amount of garlic waste has not been well developed and utilized so far. At present, it is used to extract garlic polysaccharides (Chen Xiong. Research on extracting garlic polysaccharides from the waste of garlic essential oil. Food Industry Science and Technology, 2007, 28 (1): 117-119.), or comprehensively extract multiple beneficial components (Wei Jinfeng, Zeng Xiaolan, Wang Yudong, Chen Yongfei. Research on comprehensive utilization of waste after garlic essential oil extraction. Journal of Xinyang Normal University, 2002, 15 (1) : 95-97.), but after the extraction, a large amount of solid waste is still generated and cannot be properly utilized, and is often piled up and discarded, which not only occupies space, but also wastes resources. The rotten smell also pollutes the air

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