污泥生物炭处理水环境新兴污染物研究进展

Review on the application of sludge derived biochar in the treatment of emerging contaminants in water environment

我国污水处理厂每年产生大量市政污泥,其处理处置成本高昂。从污泥热解转化而来的生物炭可以用作吸附剂或催化剂等高价值产品。该工艺是在合理处置市政污泥的基础上实现"变废为宝"。不同制备方法制备的污泥生物炭的性能有较大差异。为了改善生物炭的物理和化学性质,可以采用改性方法增加表面活性位点的数量。污泥生物炭在废水处理中得到了广泛的应用,特别是在新兴污染物去除方面的应用受到了广泛的关注。综述了污泥生物炭的制备和改性方法,并对其在水环境中新兴污染物处理方面的应用进行了总结,为未来污泥基生物炭的生产和实际应用提供了理论指导。

A large amount of municipal sludge is produced in the sewage treatment plants every year,causing high treatment and disposal costs.Biochar,which is converted from the pyrolysis of sludge,could be used as high-value products such as adsorbents or catalysts.This process turns waste into treasure on the basis of rational disposal of municipal sludge.The properties of sludge biochar produced by different preparation methods are quite different.To improve the physical and chemical properties of the biochar,modification methods are used to increase the number of surface active sites.Sludge biochar has been widely used in wastewater treatment,especially the application in the removal of emerging pollutants has received extensive attention.This article reviews the preparation and modification methods of sludge biochar,and summarizes its application in the treatment of emerging pollutants in the water environment.These may provide a theoretical guidance for the production and practical application of sludge-based biochar in the future.