Two biopolymer-bentonite composites, namely, bentonite-alginate beads (BAB) and bentonite-alginate-double walled carbon nanotube beads (BACB) were prepared. The synthesised adsorbent beads were characterised using Brunauer-Emmet-Teller (BET) analysis, Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD) and Thermogravimetric Analysis (TGA). Batch adsorption studies were performed to assess the dye removal capacity of both adsorbents. Three cationic dyes, namely, Methylene blue (MB), Crystal violet (CV) and Rhodamine B (RB) were used to evaluate the adsorption capacities of the prepared adsorbents. Thermodynamic studies were carried out at different temperatures to assess the adsorption behaviour of both adsorbents. Various kinetic models, i.e., pseudo-first-order (PFO), pseudo-second-order (PSO), Elovich and intra-particle diffusion (IPD) models were studied to determine the adsorption kinetics whereas Freundlich and Temkin isotherm models were utilised to study adsorption at equilibrium. Adsorption data of both BAB and BACB fitted well with Freundlich as well as Temkin isotherm for all dyes under investigation. Kinetics data of BAB and BACB followed PSO model and both adsorbents exhibited the highest adsorption capacity for MB (267.14 mg g⁻¹ and 400.55 mg g⁻¹, respectively) amongst the dyes under study. The dye removal efficiency of both the adsorbents followed the order MB > CV > RB. Regeneration studies revealed that the dye removal percentage ranged from 51% to 93% up to six adsorption-desorption cycles.

Cancer treatment using platinum has vastly been associated with numerous side effects and resistance generation. As a result, current medicinal chemistry is now emphasized on the development of novel metal based drugs bearing diverse pharmacological profile. There has been an increasing interest in the drafting of Au(III) complexes as new metal based drugs. Au(III) complexes have been observed to be especially steady under different physicochemical situations. Dithiocarbamato-Au(III) complexes show antiproliferative property against specific human tumor cells because of their inhibiting effect towards the tumor cell augmentation. The review focuses on the results obtained in the field of anticancer and antimicrobial efficacy of Au(III) complexes. The represented Au(III) complexes as anticancer agents have been classified as (a) complexes containing Au-N bonds, (b) complexes containing Au-S bonds and (c) complexes containing Au-O bonds. Au(III) complexes as antimicrobial agents have been subdivided as (a) antibacterial and antifungal (b) antimalarial and (c) antitrypanosomial Au(III) complexes. The results obtained from the analysis of anticancer and antimicrobial Au(III) complexes could possibly lead to the design and development of novel potent Au(III) complexes exhibiting enhanced activities.