scholarly journals Efficient Removal of Pb (П) from aqueous waste by manganese oxide/modified activated carbon composites

2020 ◽  
Vol 0 (0) ◽  
pp. 1-17
Author(s):  
Hafez El-Ahwany ◽  
Waleed Abddellah ◽  
Ragaa El-Sheikh
Keyword(s):  
Activated Carbon ◽  
Manganese Oxide ◽  
Carbon Composites ◽  
Efficient Removal ◽  
Modified Activated Carbon ◽  
Aqueous Waste

Efficient Removal of Pb(II) and Co(II) Ions from Aqueous Solution with a Chromium-Based Metal–Organic Framework/Activated Carbon Composites

2021 ◽  
Vol 60 (11) ◽  
pp. 4332-4341
Author(s):  
Hossein Shahriyari Far ◽  
Mahdi Hasanzadeh ◽  
Mina Najafi ◽  
Targol Rahimi Masale Nezhad ◽  
Mahboubeh Rabbani
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Metal Organic Framework ◽  
Carbon Composites ◽  
Efficient Removal ◽  
Metal Organic ◽  
Organic Framework

Removal of Trace Mercury in Water by Iron Manganese Oxide Modified Biochar

2021 ◽  
Vol 15 (5) ◽  
pp. 629-638
Author(s):  
Sheng Liu ◽  
Xujie Li ◽  
Zilin Su ◽  
Linya Yi ◽  
Zhanli Chen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Kinetic Model ◽  
Manganese Oxide ◽  
Low Cost ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Process Technology ◽  
Modified Activated Carbon ◽  
Modified Biochar ◽  
Iron Manganese

Mercury wastewater is a kind of heavy metal wastewater discharged from many industrial processes. The treatment of a large amount of mercury-containing wastewater increasingly requires high-efficiency, low-cost, and low-cost treatment materials, treatment processes and technologies to ensure compliance with mercury standards. This paper mainly studies the effect of iron-manganese oxide modified biochar on the removal of trace mercury in water. The prepared activated carbon is added to a mercury solution with a proper concentration, and a single factor adsorption experiment of pH, initial concentration, amount of activated carbon, particle size, temperature, and time is performed. In this paper, iron manganese oxide modified biochar is listed as the research object. The activated carbon is studied through the adsorption characteristics, adsorption mechanism and influencing factors of mercury in the solution, and the process technology and optimization parameters of the modified activated carbon to treat mercury-containing wastewater are explored. The maximum adsorption capacity of modified activated carbon calculated by Lagergren quasi-first-order kinetic model is 16.62 mg/g. This indicates that the adsorption kinetics of Hg by iron-manganese oxide modified biochar is more consistent with the Lagergren quasi-secondary kinetic model and is also more efficient.

Efficient removal of HCN through catalytic hydrolysis and oxidation on Cu/CoSPc/Ce metal-modified activated carbon under low oxygen conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 113834-113843 ◽  
Author(s):  
Langlang Wang ◽  
Xueqian Wang ◽  
Xuli Jing ◽  
Ping Ning
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Hydrogen Cyanide ◽  
Reaction Pathways ◽  
Catalytic Hydrolysis ◽  
Low Oxygen ◽  
Efficient Removal ◽  
Modified Activated Carbon ◽  
Oxygen Conditions

The hydrogen cyanide (HCN) removal efficiency of activated carbon modified with different metals (Cu(NO)3, cobalt sulfonated phthalocyanine (CoSPc) and Ce(NO3)3·6H2O) was studied under low oxygen conditions. The reaction pathways are also proposed.

Catalytic Decomposition Kinetics and Mechanism of Hydrogen Peroxide by Modified Activated Carbon

2011 ◽  
Vol 243-249 ◽  
pp. 4860-4863
Author(s):  
Zhen Zhong Liu ◽  
Hui Ping Deng ◽  
Zhan Li Chen
Keyword(s):  
Activated Carbon ◽  
Manganese Oxides ◽  
Catalytic Properties ◽  
Catalytic Decomposition ◽  
Carbon Composites ◽  
Order Kinetic ◽  
Modified Activated Carbon ◽  
First Order ◽  
Peroxide Decomposition ◽  
Iron And Manganese

Modified activated carbon composites were prepared and their catalytic properties were evaluated in the H2O2decomposition. Activated carbon alone showed very low activities compared to iron and manganese oxides / activated carbon composites, suggesting that the presence of Fe and Mn in the oxide plays an important role for the activation of H2O2. The presence of Mn in the composite structure produced a remarkable increase in the reactivity. The obtained results showed that the peroxide decomposition catalyzed by GACFM met pseudo-first-order kinetic and the maximum OH· production was on GACF1M3.The decomposition mechanism of H2O2was analyzed in detail.

Influence of Catalytic Conditions on Hydrogen Peroxide Decomposition by Modified Activated Carbon

2011 ◽  
Vol 243-249 ◽  
pp. 4793-4796
Author(s):  
Xiao Hua Huang ◽  
Zhen Zhong Liu
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Manganese Oxide ◽  
Opposite Effect ◽  
Carbon Composite ◽  
Hydrogen Peroxide Decomposition ◽  
Modified Activated Carbon ◽  
Usage Rate ◽  
Peroxide Decomposition ◽  
Iron And Manganese

Iron and manganese oxide /activated carbon composite (GACF1M3) was prepared and the experiment conditions including pH ,GACF1M3 dosage and organic effect were evaluated in the H2O2decomposition. The results showed that the decomposition of H2O2increased with time ,GACF1M3 can decompose H2O2about 75% in 120min . The amount of H2O2reflected the maximum usage rate of the GACF1M3 when the dose was 100mg. The highest H2O2decomposition of GACF1M3 was achieved at pH 8.5, the maximum OH· production was pH 5.0.The presence of HA can increase H2O2decomposition while TCP has the opposite effect.

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