FTIR study and bioadsorption kinetics of bioadsorbent for the analysis of metal pollutants

Abstract

Elevated concentrations of heavy metals in groundwater cause many environmental problems. The present paper reports adsorption behavior of a green bioadsorbent (Trichoderma sp.) for the removal of heavy metal ions from industrial effluents. Sampling of the groundwater within a commissioned landfill site showed contamination of the groundwater with some toxic heavy metals. Fungal biomass of Trichoderma sp.was tested to treat contaminated groundwater and it was found that dried Trichoderma sp. demonstrated significant ability for the extraction of Cd 2+ , Ni 2+ and Cr 3+ ions compared to wet Trichoderma. Fourier transform infrared (FTIR) analysis was conducted on wet and dry biomass before and after treatment to observe the changes in functional groups. In addition, Freundlich and Langmuir adsorption isotherms were used to verify the adsorption performance of Trichoderma sp. The Langmuir adsorption isotherm was found to be a better fit than the Freundlich adsorption isotherm. The maximum adsorption capacities of Ni 2+ , Cd 2+ and Cr 3+ ions on Trichoderma were found to be 0.1353 (pH 4), 0.374 (pH 8) and 0.0527 (pH 10), respectively. The results of removal efficiencies of metal on Trichoderma indicate that it can be successfully applied for the removal and recovery of Cd 2+ , Ni 2+ and Cr 3+ ions from industrial effluents with 100% recovery.

A comparative study of metal contamination in soil using the borehole method

“…The contamination of heavy metal ions in the environment is caused by the anthropogenic activities which originated from mining, industrial emission, as well as traffic emission Rahman et al 2014). Developed countries such as the USA, Canada, and Europe provide the indications that a site may be potentially polluted depending on the historical risk studies, assessment of soil surface, and groundwater quality.…”

Supercritical Fluid CO2 Technique for Destruction of Pathogenic Fungal Spores in Solid Clinical Wastes

“…These fungi are frequently found in clinical waste samples [36]. The optimization of SC-CO 2 was carried out by using A. niger as a biological indicator recommended by STAATT [13].…”

“…According to STAATT [13], spores suspension containing 10 6 spore mL À1 was used as inoculum. If the numbers of spores are >10 6 , the dilution to the desired concentration was done according to Eq.…”

“…Consequently, the infectious agents that are abound in the clinical wastes must be inactivated by proper sterilization treatment. These concerns over the clinical wastes have been well established resulting in various treatment methods to ensure the wastes are made innocuous before safe disposal [7][8][9][10][11][12][13][14]. Some of the more common techniques that are reputable as means to treat the clinical wastes include incineration, autoclaving sterilization, irradiation, microwave, and chemical disinfection as attested by State and Territorial Association on Alternative Treatment Technologies (STAATT) [15] and United State Environmental Protection Agency (US EPA) [16] as well as other research work [17,18].…”

An indigenous Halomonas BVR1 strain immobilized in crosslinked chitosan for adsorption of lead and cadmium

“…More recently, multiwalled carbon nanotubes have also been studied for the adsorption of metals [13]. With the increasing hazards due to heavy metal pollution, biosorption is more effective as an eco-friendly option [14,15] for the sequestration of heavy metal ions. Microbial biomasses when used as such for metal remediation possess certain drawbacks such as small particle size, biomass swelling and poor mechanical strength [16,17].…”