DNA from Plant leaf Extracts: A Review for Emerging and Promising Novel Green Corrosion Inhibitors.

With growing global awareness and concern for environmental protection through the use of less hazardous and environmentally-friendly extracts of plant origin, there has been a plethora of green corrosion inhibitors research with far reaching contributions to the science of corrosion prevention and control. Attention has increasingly turned towards green corrosion inhibitors, compounds of natural origin with anti-oxidant activity towards metals and their alloys. Green inhibitors have been investigated for their corrosion and adsorption properties with good results. The findings from these research works provide evidence of the adsorption behavior of green inhibitors which was confirmed by the adsorption isotherms that were proposed. Adsorption is the first step of any surface reaction and since corrosion is a surface phenomenon the effectiveness of green corrosion inhibitors is related to their ability to adsorb on metal surfaces. This review proposes the potential of plant dna as an emerging and promising novel inhibitor for mild steel. It begins with a list of plants that have been used in studies to determine corrosion inhibition properties and moves on to establish the adsorption behavior of bio macromolecules; protein, polysaccharides (chitosan) and dna. It reviews studies and investigation of dna interaction and adsorption on inorganic surfaces before focusing on the use of salmon (fish) sperm dna and calf thymus gland dna as green corrosion inhibitors for mild steel. It concludes that plant dna is a promising candidate for green corrosion inhibitor given the similarity between the plant and animal dna structure and function, and the fact that the use of plant is more environmentally sustainable than animal-based produc

Synthesis of fatliquor from waste bovine fat for use in small scale leather industry

116-120In this study, fatliquor has been synthesized from waste bovine fat for its use in small scale leather industry. The physico-chemical properties of bovine fat are determined before sulphation with sulphuric acid followed by the subsequently neutralization with ammonia to produce the fatliquor. The fatliquor is subjected to chemical and physical analyses. The degree of sulphation is found to be 90% and the surface active groups of the fatliquor are observed in anionic form. The fatliquor has been applied onto light leather and physical tests are carried out on the fixed leathers. The results of the physical tests on fixed leather conform to the standard leather specifications. It is observed that the synthesized fatliquor could be used as an alternative in leather fixation

Sorption of phenol from aqueous solution using chicken feathers

Concern is growing over the contamination of the water environments with organic pollutants, such as phenolic compounds because of their adverse effects on health and environment. In these studies, the ability to remove phenol from aqueous solution has been achieved using chicken feathers as an adsorbent. Batch studies were performed to evaluate the effects of process parameters such as initial concentration, contact time, adsorbent dosage, and temperature. Adsorption capacity for the adsorbent was dependent on the temperature since an increase in phenol removal efficiency with an increase in temperature was observed. Results have shown that an increase in the amount of adsorbent was followed by increased efficiency in phenol removal owing to a corresponding increase in adsorption sites. The equilibrium time for phenol removal was found to be 24 h. The experimental data were well represented by the Freundlich (R2 = 0.9869) and the Langmuir (R2 = 0.9997) isotherm models with data slightly better fitted to the Langmuir than the Freundlich isotherm model. The maximum sorption capacity was found to be 16.5 mg/g at 30°C and pH 8. Chicken feathers, an inexpensive and easily available material, can be an alternative to more costly adsorbents used for the removal of phenol from wastewater