A kind of wool fiber dyed with black fruit wolfberry extract for removing hexavalent chromium ions in water and its preparation method

Abstract

The invention relates to wool fiber dyed with wolfberry black fruit extract used for removing hexavalent chromium ions in water and a preparation method thereof. The method is characterized in that the wool fabric is dyed with the wolfberry extract, and the dyed wool fabric is post-mordanted with ferric ions, so that the reducing active ingredients in the wolfberry extract are fixed on the surface of the wool fiber, and then the finishing is carried out. Putting good dyed wool fabrics in waste liquid containing hexavalent chromium ions can effectively remove hexavalent chromium ions in wastewater. The raw materials of wool fiber dyed with black lycium barbarum extract prepared by the process of the present invention are all green and environmentally friendly materials, and the heterogeneous treatment system will not produce a large amount of chromium sludge, and has the characteristics of easy separation and reusability. It will not cause secondary pollution, so it is more advantageous to use wolfberry extract wool fiber to treat Cr(VI) pollution.

Description

technical field [0001] The invention relates to a heavy metal reduction technology, a wool fiber dyed with black fruit Lycium barbarum extract used for removing hexavalent chromium ions in water and a preparation method thereof. Background technique [0002] Heavy metal pollution in my country's water environment is becoming more and more serious, among which chromium pollution is more prominent. The sources of chromium pollution in the water environment can be roughly divided into three categories: industrial production, daily life and chemicals. Chromium mainly exists in trivalent (Cr(III)) and hexavalent (Cr(VI)) forms in water. Cr(VI) has high solubility and high toxicity in water, it is not easy to be biodegraded, and it will accumulate in humans and animals through the food chain, which will lead to serious gene mutation and cancer. Can cause death, usually Cr(VI) exists in water as anion. In contrast, Cr(III) is less toxic and is one of the essential nutrients for ...

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Problems solved by technology

The adsorption method can adsorb and treat wastewater containing hexavalent chromium ions to a certain extent, but due to the high water solubility of hexavalent chromium ions and the limitation of the adsorption and removal effect by the saturated adsorption capacity of the adsorbent, this method is difficult to meet the needs of actual wastewater treatment[ See 2. Wang Jiahong, Chang E, Ding Shaolan, et al. Research progress on the removal of hexavalent chromium in water by adsorption method [J]. Environmental Science and Technology, 2012, 35(2): 73-78.]; The toxicity of chromium ions is limited [see 3. Chen Lin, Qiu Tingxing, Chen Ming. Experimental research on biosorbent removal of hexavalent chromium in water [J]. Leather Science and Engineering, 2003, 13(4): 48 -51.]; Although the chemical precipitation method is relatively simple, there will be a large amount of sedimentation sludge, and the treatment of low-concentration hexavalent chromium ions and the subsequent sludge treatment need to increase investment, and the cost is relatively high; the ion exchange method is for treatment Those containing ionic and non-ionic impurities are limited, and the operating cost is also high; although the reverse osmosis method can effectively reduce the concentration of metal ions, the high operating cost and limited range limit its application

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