In this work, removal of C. I. Acid Red 14 was investigated by Pumice stone as a low cost adsorbent. Various parameters such as initial dye solution, contact time and pH were studied. Removal of dye were increased by increasing of contact time and initial dye solution and deceased by increasing of pH. Three isotherm models were studied. Linear and non-linear regression analyses were used fo...

Abstract The building sector benefits from high-strength lightweight concrete (HSLWC) in various aspects, particularly reducing the structure’s dead load. Incorporating waste materials into HSLWC encourages sustainable practices, reduces their environmental effect, and decreases product’s costs. This research focuses on producing using a pumice stone additive such as sugar molasses, silica fume...

Background: Petroleum hydrocarbons that are released from industrial processes cause damage to aquatic life and degrade ecosystems by accumulating in the food chain, allowing living organisms produce toxic secretions. Methods: In this study, a pumice stone was used remove total petroleum (TPHs) wastewater south refinery company Iraq/Basrah coagulation flocculation using design of experiments (D...

Abstract. Due to its unique properties as compared ordinary concrete, lightweight concrete play a major role in construction sector. Here, this research explain the development of self-compact by replacing coarse aggregate together pumice stone, which is used material various proportions. An investigation on effect partially replaced with stone carried out. The fresh and hard property self-comp...

OBJECTIVE To evaluate the in vitro changes on the enamel surface after a micro-abrasion treatment promoted by different products. MATERIAL AND METHODS Fifty (50) fragments of bovine enamel (15 mm × 5 mm) were randomly assigned to five groups (n=10) according to the product utilized: G1 (control)= silicone polisher (TDV), G2= 37% phosphoric acid (3M/ESPE) + pumice stone (SS White), G3= Micropo...

The exploitation of natural quarries generates a high amount waste as result the extraction, screening and segmentation processes. These usually inert wastes are not typically reused end up in landfills. There is an urgent need for sustainable solutions aiming at valorisation these mineral through development innovative products with greater added value active functionalities. In this work, app...

Pumice rafts are floating mobile accumulations of low-density pumice clasts generated by silicic volcanic eruptions. Pumice in rafts can drift for years, become waterlogged and sink, or become stranded on shorelines. Here we show that the pumice raft formed by the impressive, deep submarine eruption of the Havre caldera volcano (Southwest Pacific) in July 2012 can be mapped by satellite imagery...

Proteases represent the most important kind of enzymes from an industrial point of view. Alkaline proteases have applications in leather processing, laundry detergents, production of protein hydrolysates, and food processing. In this study, cell immobilization has been used for enhancing enzyme titer. Our aim was to choose carriers, methods, and optimal conditions for immobilization of growing ...

Abstrak Beton yang mengalami kebakaran pada suhu 400˚C akan degradasi kekuatan hingga kuat tekan sisa 58,40% Hal ini mempengaruhi kualitas/kekuatan struktur beton tersebut dan menyebabkan menjadi getas, memungkinkan kegagalan. Diperlukan upaya proteksi pasif dengan menggunakan material memiliki ketahanan terhadap api. Salah satu api baik adalah batu pumice. Penelitian bertujuan untuk mengetahui...