The treatment of dye wastewater is a common concern all over the world and there are countless methods to deal with this problem. Biochar adsorption is popular for its convenience and efficiency, but the high price is a deterrent. Some renewable resources that are considered as waste, such as agricultural and forestry waste, marine waste, livestock manure and municipal wastewater, can compensate for this shortcoming. Photocatalytic degradation is an emerging approach to remove dyes with environmental friendliness. This paper provides an overview of the preparation of dye adsorbents from renewable resources and photocatalytic degradation. Hope to provide some new ideas for the relevant industries.
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