نتایج جستجو برای: at first acid solution ph 35 and then soda solution ph 11
تعداد نتایج: 17494058 فیلتر نتایج به سال:
the removal ofxylenol orange from aqueous solution onto the coal ash was investigated at room temperature. the results show that the adsorption capacity of xylenol orange increased as the adsorption time increased and then equilibrium established after 30 min adsorption time. the results obtained revealed that the coal ash removed about 80 % of xylenol orange from the aqueous solution within 40...
Leaching of Arsenic from high Arsenic loaded iron oxide impregnated brick sands (IOI CBCM) was investigated using common household chemicals like common salt and soda ash, the industrial chemicals caustic soda and the phosphates used as fertilizers such as potassium hydrogen phosphate and TSP. Leaching by ordinary ground water was also investigated on the arsenic saturated iron oxide impregnate...
Carboxymethyl Cellulose (CMC) a compound made from starch of tubers ganyong flour with added methanol, propanol and water. Four process involving alkalization process, karboksimetilasi, neutralization in the making CMC. Carboxymethylization alkazation proess Alkazation is reaction between cellulose soda solution (alkaline) to become alkaline (cellulose soluble solution). rection sodium chloro a...
a simple, rapid and economic procedure was presented to remove lead(ii) from aqueous solution under the optimized conditions. it is based on the sorption of pb2+ ions from aqueous solutions onto limestone fines (ls), which is an inexpensive and widespread over the globe, followed by flotation with oleic acid (hol) surfactant. the different parameters (namely: solution ph, sorbent, surfactant an...
power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...
ion Ezchunye Resins-De-Acidite (The Permutit Company, New York), washed on a 40 mesh screen with distilled water, was treated several times with aqueous 4 per cent sodium carbonate and repeatedly washed with distilled water, by suspension and decantation, until the supernatant liquid was colorless and had a pH of 8.0 or less. The resin collected on a suction filter contained 70 to 80 per cent w...
Background and purpose: Phenol whose carcinogenic property has been evidenced is one the organic compounds found in industrial wastewater. Therefore, this effluent must be treated before it is discharged to the environment. The aim of this study was to investigate whether dried azolla can absorb phenol from aqueous solution. Materials and methods: First, the collected azolla was washed by dis...
the aim of this paper is eliminating cr(vi) by natural hap. hap is a inexpensive material which is used from bovine critical bone ash in order to remove heavy metal ions like cr(vi). some experiments in different ph are performed (ph=2,3,7). maximum adsorption was appeared at ph=2, dosage=0.3 gr, c0=10 mg/l. cr(vi) removal depends on ph value and initial amount of cr(vi) result of experiments w...
Abstract Dissolved hexamine in acetic acid is used as precursor in production of HMX explosive by Beckmann procedure. But, the gradual degradation of hexamine is occurred in acidic media, leading to decrease of purity and efficiency of HMX. In this research, the kinetic of degradation reaction of hexamine is studied in acetic acid media. The concentration of formaldehyde as product of degradati...
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