Sedimentation studies have been carried out to optimize the dispersion conditions of aqueous alumina nanopowder suspensions with or without dispersants (ammonium salt of polymethacrylic acid or rhamnolipids at 15%). Different dispersant dosages, solid loadings, pulp densities and pH values were examined. The iso-electric point (IEP) of the alumina nanopowder was found to be pHiep= 9.2. The expe...

This study aimed to predict the CNC cutting conditions for best wood surface quality, energy, and time savings using artificial neural network (ANN) models. In process, walnut, ash were used as materials, while three different tool diameters (3 mm, 6 8 mm), spindle speed (12000 rpm, 15000 18000 rpm), feed rate m/min, 9 m/min) determined conditions. After processes completed with machine, energy...

It is demonstrated that the addition of organo-modified Na-bentonite (OMB) particles to Portland cement mortar can promote its physical and mechanical properties. A series of experimental works on some important physico-mechanical properties of Portland cement mortars mixed with various dosages of hydrophobic OMB were performed. The obtained results confirm that the OMB provides a dense packing...

The main purpose of the research is to study composition walnut shells. Walnut kernels are widely used in food industry, but, at same time, shell obtained stage cleaning usually disposed by burning. Given multi-ton volume fruit processing, output production waste also significant. When processing even one ton walnuts, an unused product remains – a weighing over 550 kg, which requires removal an...

Heavy metal contamination is a primary concern worldwide and it discharged from the industrial wastewater to large amount of heavy receiving environments. In recent years, effective use agricultural by-products definitely major challenge in waste management. The fact that residues are more easily obtained cheaper than commercial adsorbents makes attractive. this study, removal zinc using natura...

The effectiveness of low cost agro-based materials namely, Tamarindus indica seed (TS), crushed coconut shell (CS), almond shell (AS), ground nut shell (GS) and walnut shell (WS) were evaluated for Cr(VI) removal. Batch test indicated that hexavalent chromium sorption capacity (q(e)) followed the sequence q(e)(TS) > q(e)(WS) > q(e)(AS) > q(e)(GS) > q(e)(CS). Due to high sorptive capacity, tamar...

<p>Dinitrobutylphenol is a toxic and resistant pollutant that pollutes the environment by producing toxins chemical wastewater. Present paper aims to study efficiency of magnetic particles walnut hard shell ash as cheap bi-compatible adsorbent for removable DNBP from aqueous environments. This was conducted at laboratory scale studied most important parameters including contact time, pH, ...

PANDA2, a computer program for the minimum-weight design of elastic perfect and imperfect stiffened cylindrical panels and shells under multiple sets of combined loads, is used to obtain optimum designs of uniformly axially compressed elastic internal T-ring and external T-stringer stiffened cylindrical shells with initial imperfections in the form of the general buckling mode. The optimum desi...

Chitooligosaccharides could be produced from chitosan by a newly isolated microorganism, Bacillus thuringiensis ZJOU-010, which exhibited chitosanase activity using shrimp shell wastes as the carbon/nitrogen source. In this study, a 2 central composite experimental design was performed to improve the chitosanase activity by response surface methodology (RSM). The mathematical model developed wa...

Polyvinyl ester green composites were synthesized with walnut shell powder (WSP) by in-situ polymerization technique. The green composites have been evaluated for mechanical properties such as tensile strength, tensile modulus and hardness. Sliding wear loss, specific wear rate and coefficient of friction were investigated by using computerized pin-on–disc machine at normal applied loads of 20,...