Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userThe effect of Some factors (pH, contact time, the concentration of the initial solution) in the adsorption and kinetics of chrome
تأثير بعض العوامل (الرقم الهيدروجيني، زمن التلامس، و تركيز المحلول الأولي) في حركية و ادمصاص معدن الكروم
1080
1 43
0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
نُفذت التجربة مخبرياً من خلال تجربة الباتش حيث تم دراسة تأثير كلاً من الرقم الهيدروجيني ( 5.5- 7- 8.5 )، و زمن التلامس بين المحلول و التربة ( 1 - 5 - 10 /د ) و تركيز المحلول من معدن الكروم ( 13.4- 22.84 - 47.57 ملغ/ل) في حركية و ادمصاص الكروم. بينت نتائج تجربة الباتش ان كمية الكروم المدمصة من المحلول المائي تزداد مع الزمن، و تكون هذه الكمية أكبر في الدقيقة الأولى، و ذلك في جميع درجات الرق الهيدروجيني للمحلول و مهما كان تركيز الكروم في المحلول الأولي، و كذلك درجة الادمصاص أو نسبة الإزالة، و أن كمية الكروم المدمصة من المحلول تكون أكبر عندما يكون الرق الهيدروجيني للمحلول 8.5 ، و ذلك مهما كان تركيز المحلول الأولي، و كذلك درجة الادمصاص أو نسبة الإزالة.
Carried out the experiment in the laboratory through the experience of the patch where they were both studying the effect of pH (5.5-7- 8.5), and the time of contact between the solution and the soil (05.01.10 / d) and the concentration of the solution of the metal chromium (13.4-22.84-47.57 mg / l) in the adsorption kinetics and chrome. The results of the patch test showed that the amount of chromium adsorbed from the aqueous solution increases with time, and be this quantity greater in the first minute, and in all degrees of the pH of the solution Whatever the chromium concentration in the initial solution, as well as the degree of adsorption or removal ratio, and chrome amount adsorbed from The solution is greater when the pH of the solution is 8.5, and that whatever the initial concentration of the solution, as well as the degree of adsorption or removal ratio.
References used
FAN, Q., JIANG H., HONGXI., X., CHANGWIE L., YING L. S., YING S., LILI S., 2007-Competitive adsorption, release and speciation of heavy metals in the Yellow River sediments, China. Environ Geol. 53:239-251
AGBOZU, I. E., EMORUWA, F. O., 2014- Batch Adsorption of heavy metals Cu, Pb, Fe, Cr, Cd, from aqueous solutions using coconut husk. Afr. J. Environ. Sci. Tecnol. Vol. 8(4), pp. 239-246
HORSFALL M, SPIFF AI., 2004- Studies on the effect of pH on thesorption of Pb2+ and Cd2+ ions from aqueous solutions by Caladiumbicolor (Wild cocoyam) biomass. Elec. J. Biotechnol. 7 (3): 313-323
rate research
Read More
Carried out a laboratory experiment in order kinetics study of adsorption
of cadmium and lead in the soil, using soil columns experiment, with the
use of concentration 26.25 mg / l for cadmium, and 27.81 mg / l for lead,
and two degrees of pH 5.5, 0.7, with the use of five parameters.
Experiments were conducted on field (2014) for knowing the effect
of nitrogenous fertilizers (Ammonium Nitrate, Urea, Ammonium
Sulfate) in increased concentrations with
two ways of fertilization (Scattered, local) in growth of the young
Beet plan
ts class Dita (dry weight, density rooty, content of soil and
plant from nitrogen) under condition of soil and climate in Deir
Ezoor.
The research aims to study the differences of some aspects of physiological
activities in three ornamental plants, Conocarpus erectus L., Hibiscus rosasinensis
L, and Vinca rosea L. grown in Makkah. These plants are founded in
similar environmenta
l circumstances (drought and rewatering). Through
studying and comparing: Photosynthetic activity, maximal productivity,
strategies of drought tolerance, transpiration and hardening. Determining of
the most suitable environmental and agricultural conditions of each plant
species mentioned above have been achieved.
hybrid commercial chicks (Hubbard Flex) were A total of /450/
reared from 1 to 42 days of age. Chicks were distributed into five
groups; each group contained 90 birds within three replicates. Five
diets were used; the first was the traditional die
t (control group) and
the others differed in the growth promoters added and were as
following: nutritional antibiotic (Lincomycin) for the second group,
probiotic (Bacillus subtilis) for the third group, prebiotec (manna
oligosaccharide) for the forth group and finally a mixture of organic
acids for the fifth group.
The substance, Na٢-EDTA, disodium salt of Ethylene Diamine Tetra Acetic
acid, has big influence on the setting time of both Portland cement, and clinker.
The time of initial, and final setting is remarkably changed in the presence of a
small perce
ntage of Na٢-EDTA (less than ١٪ of the cement weight).
The chemical analysis indicates that the total concentration of calcium in the
aqueous phase of cement increases in the presence of Na٢-EDTA. While, the
concentration of free calcium ions in the aqueous phase decreases as the
percentage of Na٢-EDTA increases. Na٢-EDTA forms chelating complexes with
calcium, and some other metals such as iron and magnesium at high PH values,
as in the case of a mixture of cement and water.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
