污泥基活性炭改性及其对污水的去除机理研究文献综述

 2022-07-11 10:07

污泥基活性炭改性及其对污水的去除机理研究

摘要:污泥作为各种水处理过程中的副产物易造成环境污染。污泥基活性炭能够使污泥得到资源化利用,且制备成本低,吸附效果强。但仅以污泥作为原料制备的活性炭比表面积较低、吸附性能不高,去除污水能力有限。表面改性能够有效改变活性炭的表面化学性质和纹理结构,进而提高对污染物的吸附效率。目前最常用且有效进行表面改性的方法就是添加增碳剂及负载。本文通过对国内外已有添加物进行总结与比较,拟采用花生壳、核桃壳和纳米二氧化钛作为添加物,与污泥按比例制备污泥基活性炭。

关键词:污泥基活性炭,花生壳,核桃壳,纳米二氧化钛

Study on Modification of Sludge-based Activated Carbon and Its Removal Mechanism for Wastewater

Water Supply and Drainage Science and Engineering Yang Can 150605223

Abstract:Sludge, as a by-product of various water treatment processes, is liable to cause environmental pollution. Sludge-based activated carbon (SBAC) can make sludge recycled, and has low preparation cost and strong adsorption effect. However, activated carbon from activated carbon sludge prepared only from sludge has low specific surface area, low adsorption capacity and limited wastewater removal capacity. Surface modification can effectively change the surface chemical properties and texture structure of activated carbon, thereby improving the adsorption efficiency of pollutants. At present, the most common and effective method of surface modification is to add carburizing agent and modifier. In this paper, the existing additives at home and abroad were summarized and compared. Peanut shell, walnut shell and nano-titanium dioxide were used as additives to prepare activated carbon based on sludge in proportion to sludge.

Keywords: sludge-based activated carbon, peanut shell, walnut shell, nano-titanium dioxide

  1. 前言

污泥是由水和污水处理过程中产生的副产物,若污泥处理处置不当,则会造成二次环境问题。利用污泥制备污泥基活性炭,不仅能使污泥得到资源化利用,更能以低成本方式制备出环境友好且进行废水处理的吸附剂。

1.1污泥的产生和危害

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