Biosorption the Possible Alternative to Existing Conventional Technologies for Sequestering Heavy Metal Ions from Aqueous Streams: A Review
Journal Title: Universal Journal of Environmental Research and Technology - Year 2012, Vol 2, Issue 4
Abstract
Transition metal ions in industrial effluent discharge are of great threat to the environment. Several conventional treatment technologies viz., ion exchange, membrane separation, ultra-filtration, ion flotation, electro-coagulation, electrodialysis, sedimentation and reverse osmosis have been employed. However these methods involve high operating cost and produce large volume of toxic chemical sludge. In this context, biosorption process could be helpful and is emerging as a potential alternative to the existing technologies for the removal and recovery of metal ions from aqueous solutions. The major advantages of biosorption over conventional treatment methods include high efficiency, minimization of chemical sludge, low cost in regeneration of biosorbents and possibility of metal recovery. Agricultural waste materials being cellulosic are an excellent source for metal biosorption. They have different functional groups viz. hydroxyl, carboxyl, phenolic, amino, acetamido etc. having affinity for metal ions to form chelates and metal complexes. The mechanism of biosorption process includes chemisorption, complexation, diffusion, ion exchange, micro precipitation and surface adsorption. The aim of this review article is to provide the information on biosorption as a possible alternative to other conventional technologies and to highlight the chemical composition of agricultural waste material along with adsorption models and mechanism for metal biosorption.
Authors and Affiliations
Rajvinder Kaur, Joginder Singh, Rajshree Khare and Amjad Ali
Keywords
Related Articles
- EP ID EP31751
- DOI -
- Views 368
- Downloads 1
Note on Observed Snakes in Satpura Tiger Reserve and Record of Psammophis Longifrons Boulenger, 1896 Madhya Pradesh, India
Scientific literature available on Satpura Tiger Reserve shows that extensive study has been conducted on mammals and birds but there is a lack of information on the herpetofaunal diversity. Fauna of Pachmarhi Biosph...
Effects of Cadmium on Digestive Organs of Teleost Fish Ophiocephalus (Channa)
Heavy metals and their salts constitute a very important group of environment pollutants. Since they are potent metabolic inhibitors of both terrestrial and aquatic plants and animals. The various heavy metals Zn, Cd a...
Effects of Vitamin C on Lead Induced Developing Thymus in Mice: A review
The present review deals with effects of vitamin C on lead intoxicated developing thymus in mice .In the world of environmental health and medicine, lead exposure remains one of the most important problems in terms of...
Ultrasound Assisted Oxidation Process for the Removal of Aromatic Contamination from Effluents: A Review
Chemicals are the building blocks for products that meet our most fundamental needs for food, shelter, and health. The chemical industries discharge contaminated waste water that requires appropriate treatment before s...
A Review on Household’s Carbon Dioxide Emission of Municipalities
The major issue of today’s era is to combat global warming and conserve environment. The emissions of different greenhouse gases from sources are major cause of concern. Municipalities are considered as one of the main...