ELIZA

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392826 occurrences (No.45 in the rank) during 5 years in the PubMed. [no cache] 500 found

7) Biosorption equilibrium times for Cu (II) ions were observed in 30 min.

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PMID:23222695 DOI:10.1177/0748233712468016

2015 Toxicology and industrial health

* Uptake of copper ions from aqueous solutions by Bacillus strain isolated from desert soil.

- Biosorption of copper (Cu) ions from aqueous solutions has been studied in a batch system using a Bacillus species AEJ-89 isolated from Maranjab desert soil. The optimum conditions of biosorption were determined by investigating the initial pH, contact time, and the initial concentrations of metal ions at constant temperature (25°C). The maximum biosorption of Cu ions was observed at pH 5.0 ± 0.1. Biosorption equilibrium times for Cu (II) ions were observed in 30 min. The maximum biosorption capacities of Cu (II) ions on Bacillus species AEJ-89 were determined to be 0.48 mmol g(-1) at 200 mg l(-1) concentration. The experimental adsorption data were fitted to Langmuir isotherm model. The interactions between metal ions and functional groups on the cell wall surface of the biomass were confirmed by Fourier transform infrared spectroscopy analysis. Cu (II) ions were removed from metal-laden biomass after desorption treatments by the addition of different desorbing solutions. The results indicated that the bacterial isolate Bacillus species AEJ-89 is a suitable biosorbent for the removal of Cu (II) ions from aqueous solutions.

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(1)155 in	(9)9 on	(17)4 a	(25)2 data
(2)48 null	(10)8 by	(18)4 during	(26)2 experimentally
(3)36 that	(11)8 to	(19)4 the	(27)2 reduction
(4)19 for	(12)8 when	(20)3 variation	(28)2 significant
(5)18 at	(13)6 among	(21)2 as	(29)2 through
(6)16 between	(14)6 following	(22)2 changes	(30)2 throughout
(7)11 with	(15)5 after	(23)2 clinical	(31)2 up
(8)9 and	(16)5 from	(24)2 compared	(32)2 using

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--- WordNet output for observed --- Overview of verb observe The verb observe has 9 senses (first 8 from tagged texts) 1. (39) detect, observe, find, discover, notice -- (discover or determine the existence, presence, or fact of; "She detected high levels of lead in her drinking water"; "We found traces of lead in the paint") 2. (17) note, observe, mention, remark -- (make mention of; "She observed that his presentation took up too much time"; "They noted that it was a fine day to go sailing") 3. (12) note, take note, observe -- (observe with care or pay close attention to; "Take note of this chemical reaction") 4. (10) observe -- (watch attentively; "Please observe the reaction of these two chemicals") 5. (4) respect, honor, honour, abide by, observe -- (show respect towards; "honor your parents!") 6. (3) observe, celebrate, keep -- (behave as expected during of holidays or rites; "Keep the commandments"; "celebrate Christmas"; "Observe Yom Kippur") 7. (2) watch, observe, follow, watch over, keep an eye on -- (follow with the eyes or the mind; "Keep an eye on the baby, please!"; "The world is watching Sarajevo"; "She followed the men with the binoculars") 8. (1) observe, keep, maintain -- (stick to correctly or closely; "The pianist kept time with the metronome"; "keep count"; "I cannot keep track of all my employees") 9. observe, keep -- (conform one's action or practice to; "keep appointments"; "she never keeps her promises"; "We kept to the original conditions of the contract") Overview of adj observed The adj observed has 1 sense (first 1 from tagged texts) 1. (7) ascertained, discovered, observed -- (discovered or determined by scientific observation; "variation in the ascertained flux depends on a number of factors"; "the discovered behavior norms"; "discovered differences in achievement"; "no explanation for the observed phenomena") --- WordNet end ---