In this research, Polyaniline coated sawdust (Polyaniline nano composite) was synthesized via direct chemical polymerization and used as an adsorbent for the removal of acid dye (Acid Violet 49) from aqueous solutions. The effect of some important parameters such as pH, initial concentration of dye, contact time and temperature on the removal efficiency was investigated in batch adsorption system. The adsorption capacity of PAC was high (96.84 %) at a pH of 3-4. The experimental data fitted well for pseudo second order model. Langmuir model is more appropriate to explain the nature of adsorption with high correlation coefficient. The Energy of activation from arrehenius plot suggested that the adsorption of AV49 onto PAC involves physisorption mechanism.

This study analyses the feasibility of removing Direct Blue 71 from aqueous solution by different adsorbents such as activated carbon (TPAC) and Poly pyrrole polymer composite (PPC) prepared fromThevetia Peruviana. Batch mode adsorption was performed to investigate the adsorption capacities of these adsorbents by varying initial dye concentration, temperature, agitation time and pH. The performance of TPAC was compared with PPC. Among the adsorbents, PPC had more adsorption capacity (88.24%) than TPAC (58.82%) at an initial concentration of 50 mg/L and at 30°C. The experimental data best fitted with pseudo second order kinetic model. The adsorption data fitted well for Langmuir adsorption isotherm. Thermodynamic parameters for the adsorbents were also evaluated. The carbon embedded in conducting polymers matrix show better adsorptive properties than activated carbon.

Aluminates are chemicals made up of ceramic materials based on aluminum oxide as the main constituent. Aluminate materials are widely used in high-technology applications due to their unique properties, for instance, in magnetic materials, ceramic catalysis, absorbent materials, and so forth. 1-4 Spinel is a ceramic oxide with three elements which its general chemical formula is AB 2 O 4 where, in normal spinels, A stands for a bivalent metal cation (A 2+) which occupies a tetrahedral site and B represents a trivalent (B 3+) metal cation which occupies an octahedral site of a cubic lattice. In the same time, in inverse spinels, bivalent cation (A 2+) occupies an octahedral site and a trivalent (B 3+) cation occupies both octahedral and tetrahedral site. 4-6 Nowadays, cobalt aluminate (CoAl 2 O 4) are used as a color pigment in digital ceramic printing, cobalt and gibbsite precursor, catalyst, and color filter. 1-6 Moreover, this kind of spinel is one of the great interests among spinels due to its significant properties such as thermal and chemical stability, 6 optical host matrix, 4 high ability of cation diffusion, 4-7 catalytic application, to name but four. 8-10 Cobalt aluminate conventionally was synthesized by mixing alumina and cobalt oxide, and calcination of the mixture at ~1200°C for an extended period. This type of synthesis requires a long distance diffusion of metal ion that could lead to inhomogeneous and nonstoichiometry spinel. 3 Many novel synthesis methods, like combustion synthesis, 2,11-13 sol-gel, 14,15 low-temperature combustion synthesis (LCS), 3,16 reverse micelle processing, 5 polymeric precursors method, 4 etc. are used to solve these drawbacks. Combustion synthesis (CS) or Self-propagating high-temperature synthesis (SHS) is a potent, and low-cost technique for the synthesis of numerous industrially valuable materials and is used in the fabrication of several ceramic powders for

The wastewater treatment has been a main problem of the textile industry for long time. These effluents contain various kinds of synthetic dyestuffs. Owing to the good solubility, synthetic dyes are common water pollutants and they are frequently found in trace quantities in industrial wastewater 1 . Dyes may have chronic and acute effects on living organisms, affect the nature of water and inhibit sunlight penetration into the stream which reduces photosynthesis 2 .Reactive dyes are extensively used in dyeing process. However about 10 to 40 % of these dyes remain in the effluent 3,4 . Because of the more solubility of reactive dyes, removal from wastewater is difficult by conventional coagulation and the activated sludge process 5 . Adsorption is an effective treatment method that is widely used for the removal of contaminants from water and wastewater. This method has also been proven to be an important way to treat coloured effluents 6 .Activated carbon is the most commonly used adsorbent due to its high adsorption capacity 7 . However the high cost of activated carbon restricts its use largely in developing countries. This has led many researchers to search for the use of low cost and efficient alternative materials such as coal 8 , fly ash 9 , rice husk 10 , bagasse pith 11 , date pits 12 , fruit stones and nutshells 13 .

Iron oxide nanoparticles (IONPs) were synthesized by co-precipitation method with Commiphora berryi latex as stabilizing agent. The IONPS were coated with PEG2K and then loaded with silymarin drug. The synthesized IONPs, PEG2K and silymarin loaded nanoparticles were analyzed by FTIR, XRD, SEM and TEM techniques. The FTIR results indicated the coating of plant materials and the drug on the nanoparticles. The XRD results showed that the synthesized particles have a crystalline structure and controlled size of about 14.5 nm. Surface morphology of the iron oxide nanoparticles and drug loaded IONPs from SEM and TEM results show the cubic shaped particles with less agglomeration. The silymarin loaded IONPs were tested against liver and lung cancer cells by MTT assay and fluorescence microscopic analysis using various concentrations such as 10 μL, 25 μL and 50 μL. Results confirmed that the cell apoptosis was done by nucleus fragmentations. Further, the quantitative cell apoptosis was done by flow cytometric method. The results confirmed that the silymarin loaded IONPs disclosed excellent anticancer activity against lung cancer cells with 30.47% of post apoptotic cells over liver cancer cells with 30.27% post apoptosis.