The sol-gel technique has many advantages over the other mechanism for synthesizing metal oxide nanoparticles such as being simple, cheap and having low temperature pressure. Utilization of waste materials a precursor synthesis makes whole process cheaper, green sustainable. Calcium Oxide have been synthesized from eggshell through method. Raw was dissolved by HCl to form CaCl2 solution, adding NaOH solution dropwise agitate Ca (OH)2 gel finally drying at 900 °C 1 h. nanoparticle...

Eggshells are one of the solid wastes in world and considered hazardous according to European Commission regulations. The utilization wastes, like eggshells, will help create a sustainable environment by minimizing that disposed into environment. eggshell powder cement also helps reduce carbon dioxide emissions from factories reducing clinker production. In this study, effect on hydration products was investigated using X-ray diffraction (XRD), thermogravimetric analysis (TGA),...

One of the undesirable characteristics some ground and natural water sources is hardness. Hard can cause many problems around world, including increased scaling on pipes, boilers, atopic eczema odd-tasting drinking water. Hardness in caused by dissolved minerals, mainly calcium magnesium compounds. According to Water Quality Association (WQA) United States Geological Survey (USGS), hard classified based Ca2+ Mg2+ ion concentration waters, as follows: 0–60 ppm soft; 61–120 moderately hard;...

This paper studies the utilization and management of waste mollusk shell. The two major export countries shell are Southeast Asia’s Thailand Philippines. First, aquaculture oysters bivalve shells has been studied as background understanding. effect global climate change on farming consequences nearby environment neighborhoods have also discussed. technologies available a small scale not industrialized. study offers an enabling context under which suitable method can take action to solve...

Heap leaching is a low-cost technology used in industrial mining to recover precious metals such as gold and uranium, along with several other highly sought after like copper, from their primary resources (ores minerals). For many decades, there has been growing demand for heap due its environmental benefits. provides operators benign, effective economical solution the environment produces only minor emissions furnaces. The cost of process low, making this an attractive option financial...

In this study, we utilized lime mud waste from paper mills to synthesize calcium hydroxide (Ca(OH)2) nanoparticles (NPs) and investigate their application for the removal of phosphorus aqueous solution. The NPs, composed green portlandite with hexagonal shape, were successfully produced using a precipitation method at moderately high temperature. crystal structure characterization prepared Ca(OH)2 analyzed by field emission scanning electron microscopy, Fourier transform infrared...

Coal-derived power comprises over 39% of the world’s production. Therefore, a mass volume coal combustion byproducts are generated and shifted extra burden onto economy environment. Circulating fluidized bed (CFBC) has been found to be clean ultimate technology for Korea’s coal-fired plants have effective generation from low-grade imported with reduced emissions. Efforts made broaden utilization CFBC ash, promote sustainable development technology. Investigations provided numerous evidences...

As technology keeps developing, India has become an emerging market in the world consuming lithium-ion battery (LIB) numerous applications such as portable electronics, energy storage system (ESS) and latest into electric vehicles. The high-end consumption of batteries would generate a significant quantity end-of-life coming seven to eight years. Currently, there is no dedicated legislation or infrastructure handle waste stream, which could be beneficial economically, environmentally...

The synthesis of pure calcium carbonate nanocrystals was achieved using a simultaneous injection method to produce nano particles uniform size. These were characterized scanning electron microscopy and powder X-ray diffraction. needle-shaped aragonite polymorphs, approximately 100-200 nm in length. polymorph prepared aqueous solutions CaCl2 Na2CO3, which injected simultaneously into double distilled water at 50°C then allowed react for 1.5 h. resulting whisker-type with high aspect ratio...

In the present work, waste eggshells were used as a precursor for synthesis of aragonite crystals through wet carbonation method. Cadmium (Cd2+) and lead (Pb2+) removed by synthesized from synthetic wastewater. The influence initial solution pH, contact time, Cd2+ Pb2+ concentration, sorbent dosage evaluated. major sorption was observed in first 100 mins 360 Pb2+and respectively reaching equilibrium at 720 (12 hr). capacity toward much higher than Cd2+. Both heavy metals displayed high...

Coffee is one of the most popular and consumed beverages in world, which leads to a high contents solid residue known as spent coffee grounds (SCG). As known, beans contain several classes health related chemicals, including phenolic compounds, melanoidins, diterpenes, xanthines carotenoids. The waste water coming out industries has concentration organic pollutants very harmful for surrounding bodies, human aquatic life if discharged directly into surface waters. Hence it essential treat...

In this study, we present a low-cost and simple method to treat spent lead–acid battery wastewater using quicklime slaked lime. The sulfate lead were successfully removed the precipitation method. structure of quicklime, lime, resultant residues measured by X-ray diffraction. obtained results show that removal efficiencies more than 97% for both lime 49% 53% in non-carbonation process. After carbonation step, slightly decreased but 68.4% 69.3% which significantly increased compared with This...

Municipal solid waste is being produced in large quantities, keeping with a dramatic population increase and the growth of industrialization. Most this sent to landfills South Korea. However, current treatment methods including incineration recycling limited owing insufficient landfill space generation leachates soil contamination. Generally, 250–300 kg bottom ash 30–50 fly are generated from one ton incinerated municipal waste. This study seeks determine degree influence several main...

The effect of heavy metals in aqueous solutions has been addressed by several methods. Precipitation using lime, slaked or quick, is one the commonly used techniques. In this work, KR-slag was addition to Ca(OH)2 that served as a seeding material. Furthermore, CO2 injected into suspensions for pH stabilization, which further increases removal efficiency. Accordingly, results have shown great performance regarding both efficiency and reduced sludge production. More than 99% Cd2+ Pb2+ removed...