Adsorption Studies of Dyes from Aqueous Solution by Low-cost Bioadsorbents: A Review

Abstract

Toxic, carcinogenic, and create hazardous impact on ecosystem. but use of synthetic dyes isconvenient. because preparation of natural dyes is costly, time consuming, and complicated as compare to synthetic dyes.These synthetic dyes used in industries like pulp,paper, paints,plastic, cosmetic,medicine,rubber,food etc.waste water coming out from such industries contain synthetic dyes. for removal of such synthetic dyes from waste water researchers use many techniques in this review article we discuss limitations of this techniques [4] out of that technique’s adsorption technique is low-cost, simple,ecofriendly technique. But some adsorbents like CAC and CAA require high investment. To avoid this problem bio-adsorbents used as adsorbents. Plant biomass like rice husk, sawdust, dried, leaves,bark,root,seeds, are used as a bio adsorbent which are show superior adsorption capacity towards dyes. Treated and untreated powder of dried leaves shows significant adsorption capacity for dyes. The main intention of this review article is study of effect of temperature and contact time on various plant derived bioadsorbent.