scholarly journals Characterization of Tannery Wastewater and Detoxification Potentials of Polysiloxane Immobilized Ligand Systems on Selected Heavy Metals

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Habila B
Keyword(s):  
Heavy Metals ◽  
Tannery Wastewater

scholarly journals Preparation and Characterization of NaA Zeolite Membranes and its Application for Removal of Heavy Metals

2013 ◽  
Vol 2 (3) ◽  
pp. 484-492 ◽  
Author(s):  
Najib Tijani ◽  
Hammou Ahlafi ◽  
Monique Smaihi ◽  
Abdeslam El Mansouri
Keyword(s):  
Heavy Metals ◽  
Zeolite Membranes ◽  
Naa Zeolite ◽  
Removal Of Heavy Metals

scholarly journals Arginase kinetic characterization of the ­gastropod Nacella concinna and its ­physiological relation with energy­requirement demand and the presence of heavy metals

2010 ◽  
pp. 131-136 ◽  
Author(s):  
Edson Rodrigues ◽  
Helena Passeri Lavrado ◽  
Lucélia Donatti ◽  
Cecília N. K. Suda ◽  
Edson Rodrigues ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Kinetic Characterization

scholarly journals PHYSICAL-CHEMICAL CHARACTERIZATION OF SOILS TREATED WITH SEWAGE SLUDGE COMPOST

2010 ◽  
Vol 2 (5) ◽  
pp. 87-92
Author(s):  
Milda Radžiūtė ◽  
Audronė Matusevičiūtė
Keyword(s):  
Heavy Metals ◽  
Water Treatment ◽  
Sewage Sludge ◽  
Organic Waste ◽  
Organic Fertilizer ◽  
Chemical Characterization ◽  
Waste Dump ◽  
Sludge Compost ◽  
Sewage Sludge Compost

Sewage dump is the main organic waste component accumulating in water treatment companies, and therefore the utilization of dump remains a burning issue. Fertilization is the most popular and cheapest way of using sewage dump a part of which is intended for agriculture in most European countries for composting purposes. Sewage dump or its compost are suitable for fertilizing the upper layers of the soil in cases the concentration of heavy metals is not greater than sanitarian standards can tolerate. The examinations were carried out using different waste dump rates from Vilnius water treatment facility in willow (Salix viminalis) grown cultivated fields. The analysis of the soil was executed after one and two years following the fertilization process. The obtained results indicate that waste dump is a valuable organic fertilizer which contains small amounts of heavy metals. Separate heavy metals migrate from sewage sludge compost to plants differently. It was noted that the concentration of heavy metals in willows was greater (except for Pb and Cd) than that in the soil.

scholarly journals MODIFICATION AND CHARACTERIZATION OF CEIBA PENTANDRA (L.) GAERTN. (KAPOK) FIBER: PHYSICAL PROPERTIES

2019 ◽  
Vol 7 (7) ◽  
pp. 381-390
Author(s):  
Eduart Wolok ◽  
Idham Halid Lahay ◽  
Buyung R. Machmoed ◽  
Fahriadi Pakaya
Keyword(s):  
Heavy Metals ◽  
Physical Properties ◽  
Protective Layer ◽  
Absorption Capacity ◽  
Natural Material ◽  
Cellulose Content ◽  
Kapok Fiber ◽  
Fiber Properties ◽  
Kapok Fibers

Kapok fiber is a natural material that has unique properties, can be renewed with a large lumen, it has hydrophobic properties, as an absorbent in oil, heavy metals, and sound. To increase the absorption capacity of heavy metals, physical properties, and chemical resistance, modifications were made to change the fiber properties from hydrophobic to hydrophilic. One way is through the process of soaking the kapok fibers in a solvent to remove non-cellulose compounds. In this study, to improve the properties of kapok fiber, soaking has been done with various solutions, there are HCl, NaOH, NaClO, NaClO-NaOH-NaClO, and NaClO2-NaOH-NaClO2 solution. Immersion of kapok fibers in NaClO2-NaOH-NaClO2 solution can increase cellulose content up to 93.69% with porosity content of 4.75%. NaClO2-NaOH-NaClO2-treated can absorb water up to 211.27%, the second highest after treatment with the NaClO-NaOH-NaClO-treated solution of 285.29%. Immersion in NaClO-NaOH-NaClO and NaClO2-NaOH-NaClO2 solvents also causes damage to the kapok fiber protective layer which indicates the loss of lignin, so that a significant change of the hydrophobic fiber becomes hydrophilic as seen in the SEM results.

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