Chitosan (CS) and nanocomposite 5%bentonite/chitosan (5%Bt/CS) prepared from the natural biopolymer CS were tested to remove Cu(II) ions using a batch adsorption experiment at various temperatures (25, 35 and 45°C). X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis/differential thermal analysis (TGA/DTA) were used in CS and the nanocomposite characterisation. This confirmed the exfoliation of bentonite (Bt) to form the nanocomposite. The adsorption kinetics of copper on both solids was found to follow a pseudo-second-order law at each studied temperature. The Cu(II) adsorption capacity increased as the temperature increased from 25 to 45°C for nanocomposite adsorbent but slightly increased for CS. The data were confronted to the nonlinear Langmuir, Freundlich and Redlich–Peterson models. It was found that the experimental data fitted very well the Langmuir isotherm over the whole temperature and concentration ranges. The maximum monolayer adsorption capacity for the Cu(II) was 404–422 mg/g for CS and 282–337 mg/g for 5%Bt/CS at 25–45°C. The thermodynamic study showed that the adsorption process was spontaneous and endothermic. The complexation of Cu(II) with NH2 and C = O groups as active sites was found to be the main mechanism in the adsorption processes.
5 Mistakes companies make when adopting EQMS
When a person has been in industry for a while, they tend to see the same patterns repeat themselves.How businesses deploy Enterprise Quality Management Software (EQMS) is one example; companies tend to experience a common pathway, and take a similar approach. Often, it takes a lot of time and effort to get the budget for an EQMS deployment, and the budget award is greeted with excitement! All too often this initial euphoria is replaced by disillusionment or disappointment over the course of the project. As...
MBBR Wastewater Treatment - 5 Top Advantages
Modular wastewater treatment solutions have become very important to treat waste water. Water scarcity has become an important issue worldwide, requiring strategies for both water conservation and effective water and wastewater treatment. Several technologies have been in practice for generations including the conventional activated sludge process.MBBR wastewater treatmentis a relatively new water treatment process being used for filtering waste water in both industrial and domestic sectors with excellent performan...
A Faster and Better FluidScan with Version 5
Measure water contamination in turbine oils down to 300 ppm The latest version of FluidScan software can detect total water presence as low as 300 ppm in turbine oils. The method provides an alternative to laboratory tests such as Karl Fischer titration when fast, simple, and reagent-free analysis is needed.In addition to measuring water contamination, the FluidScan analyzer provides immediate, reagentless measurement of acid number (AN), base number (BN), oxidation, glycol, and other parameters. Water contaminat...
5 Essential tips about snowmobile safety
Extreme conditions and fast speeds are what make riding so much fun, but they come with risks. When you ride with your family and friends, you need to be aware of potential risks. A modern snowmobile can weigh over 600 pounds and travel up to 90 mph. Due to poor judgment, excess speed, and alcohol — approximately 200 deaths and 14,000 injuries occur every year. But this does not mean riding is dangerous. You can ensure that you have a safe and enjoyable trip while protecting yourself from the potential...
Top 5 incineration myth busters
There are a lot of myths and misconceptions out there when it comes to incinerators and with many people feeling uncertain of what they actually need when in a position to purchase a incinerator, it is sometimes difficult to tell fact from fiction. Every day we have multiple phone calls from existing and potential customers asking the same questions that have arisen from receiving false information through researching the Internet and/or our competitors. Below are the top 5 myths that we seem to debunk everyday....