Activated biochar derived from Opuntia ficus-indica for the efficient adsorption of malachite green dye, Cu+2 and Ni+2 from water.

Hazardous contaminants in the environment and their laccase-assisted degradation - A review.

Persistence of pesticides-based contaminants in the environment and their effective degradation using laccase-assisted biocatalytic systems.

Novel polysulfone ultrafiltration membranes incorporating polydopamine functionalized graphene oxide with enhanced flux and fouling resistance

Elucidating the choice for a precise matrix for laccase immobilization: A review

Green synthesis of Moringa oleifera gum-based bifunctional polyurethane foam braced with ash for rapid and efficient dye removal

Modification of biomass or natural polymers is an attractive strategy to develop efficient bioadsorbents for toxic metal ions removal from polluted water as these have inherent biodegradability after use. In the present study, Moringa oleifera gum (MOG), a natural stem exudate was modified via acryloylation reaction to nano-polyacryloyl MOG (NPAMG). The latter was characterized by different techniques (FTIR, FE-SEM, EDX, XRD, TEM, AFM and particle size analysis) and evaluated as adsorbent for Hg2+ ions as a function of contact time, temperature, pH and initial ion concentration. NPAMG has been observed to be an efficient adsorbent with the maximum adsorption capacity of 840.34 mg g−1 calculated by applying the Langmuir model. The high desorption tendency was also observed as reusability study was carried out for 20 repeated cycles with adsorption capacity of 71.25 mg g−1 after 20th cycle and cumulative 1606.25 mg g−1 of Hg2+ ions were adsorbed with the same dosage of adsorbent. Langmuir model fitted the equilibrium adsorption data better than Freundlich isotherm model. Adsorption kinetic data were best fitted by pseudo-second order kinetic model as confirmed by high correlation coefficients (0.9995) and low chi-square values (0.0009).

Functionalization of Moringa oleifera gum for use as Hg2+ ions adsorbent

Drug-polymer conjugation is a simple and efficient approach to synthesizing new, effective, and potent antimicrobial agents to counter the problem of microbial resistance. In the present study, a PEGylated dopamine ester (PDE) was synthesized using the PEGylation process and synthesis of PDE was confirmed by Fourier-transform infrared spectroscopy, elemental analysis (CHNS-O), and atomic force microscopy techniques. Later, the antimicrobial activity of PDE was assessed against four strains of bacteria (Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, and Proteus vulgaris; Gram (-)) and two fungi (Aspergillus niger and Aspergillus fumigatus) by the agar well diffusion method. The minimum inhibitory concentration (MIC) of PDE was also determined by the broth dilution method against bacteria. PDE showed significant zones of inhibition ranged from 21 to 27 mm for bacteria and 16 to 20 mm for fungi under study, which were much higher than those for dopamine hydrochloride. MIC values of PDE showed its potential antimicrobial property.

Synthesis of a PEGylated Dopamine Ester with Enhanced Antibacterial and Antifungal Activity.

Nanoparticles of oxidized-cellulose synthesized by green method

Preparation, characterization and trifluralin degradation of laccase-modified cellulose nanofibers

Dharamender Kumar

Papers

Green synthesis of Moringa oleifera gum-based bifunctional polyurethane foam braced with ash for rapid and efficient dye removal

Functionalization of Moringa oleifera gum for use as Hg2+ ions adsorbent

Synthesis of a PEGylated Dopamine Ester with Enhanced Antibacterial and Antifungal Activity.

Nanoparticles of oxidized-cellulose synthesized by green method

Preparation, characterization and trifluralin degradation of laccase-modified cellulose nanofibers