Optimization of adsorption performance by mesoporous materials developed from local clays and zeolite. Application in the treatment of real pharmaceutical effluents.

The treatment of effluents from the pharmaceutical industry currently remains a major challenge due to their impact on the environment and public health along with the cost of treatments. Considering these issues, our work focused on the development of materials with effective adsorption properties to treat industrial effluents based on locally available and inexpensive clays and zeolite. Local Algerian kaolin (Djebel Debbagh), palygorskite (Ghoufi) and zeolite (Tinbdar) were treated thermally and chemically prior to synthesis into mesoporous materials of hexagonal structure using pluronic P123 as surfactant.

Development of Ultrafiltration Kaolin Membranes over Sand and Zeolite Supports for the Treatment of Electroplating Wastewater.

A high cost of high-purity materials is one of the major factors that limit the application of ceramic membranes. Consequently, the focus was shifted to using natural and abundant low-cost materials such as zeolite, clay, sand, etc. as alternatives to well-known pure metallic oxides, such as alumina, silica, zirconia and titania, which are usually used for ceramic membrane fabrication.

Mesoporous silica synthesized from natural local kaolin as an effective adsorbent for removing of Acid Red 337 and its application in the treatment of real industrial textile effluent.

This paper presents a synthesis of mesoporous silica (MS) from natural clay as a silica source using Pluronic L35 (EO11PO16EO11) as a structure-directing agent. The prepared material was characterized by XRD, X-ray fluorescence, thermogravimetric analysis, SEM, TEM, and N2 adsorption-desorption analyses. Then, mesoporous material was used for the removal of Acid Red 337 (AR337) from aqueous solution, and the treatment of real textile effluent.

Treatment of textile wastewater using monolayered ultrafiltation ceramic membrane fabricated from natural kaolin clay.

Fabrication, characterization and application of ceramic membrane developed from Tunisian natural kaolin clay for textile wastewater treatment are presented in this study. The morphology and properties of the resulting membrane sintered at 1000°C for 3 h were then determined by Scanning Electron Microscopy (SEM), mechanical and chemical resistance and water permeability. Separation performance of the membrane was evaluated during the treatment of textile wastewater.

Bioenergy crop induced changes in soil properties: A case study on Miscanthus fields in the Upper Rhine Region.

Biomass as a renewable energy source has become increasingly prevalent in Europe to comply with greenhouse gas emission targets. As one of the most efficient perennial bioenergy crops, there is great potential in the Upper Rhine Region to explore biomass utilization of Miscanthus to confront climate change and land use demand in the future. Yet, the impacts of Miscanthus cultivation on soil quality have not been adequately explored.

Copper in soil fractions and runoff in a vineyard catchment: Insights from copper stable isotopes.

Understanding the fate of copper (Cu) fungicides in vineyard soils and catchments is a prerequisite to limit the off-site impact of Cu. Using Cu stable isotopes, Cu retention in soils and runoff transport was investigated in relation to the use of Cu fungicides and the hydrological conditions in a vineyard catchment (Rouffach, Haut-Rhin, France; mean slope: 15%). The δ(65)Cu values of the bulk vineyard soil varied moderately through the depth of the soil profiles (-0.

Textile dye removal by natural clay--case study of Fouchana Tunisian clay.

A significant amount of unused dyes remain in textile industry wastewater, the treatment of which presents a great challenge, particularly in semi-arid countries where water resources are of great concern. Liquid-phase adsorption is highly efficient for the removal of dyes and adsorbents, for example, activated carbons are used to treat wastewater, but are expensive. Clays are cheaper and several works have showed their high pollutant adsorption capacity in cases of environmental problems.

[The narrow lumbar canal. Study of a surgical series of 139 cases].

Over a period of 9 years, 139 patients with a mean age of 61 years were operated upon for disorders due to narrow lumbar vertebral canal. Clinical expression varied: lumbago, movement sciatica, intermittent claudication..

[Epidermoid cysts of the cranial vault in children. Apropos of 6 cases].

Six observations of epidermoid cysts of the cranial vault in children are reported. The main clinical sign is a cranial tumefaction; the radiological data consist in an edged osseous gap; the surgical extraction of this evolutional tumor is indicated.

[Proposal for a numerical prognostic evaluation in intracerebral hematoma].

From 300 cases of spontaneous intracerebral hematomas, 5 parameters are extracted they are: Age, sex, level of consciousness, localisation of hematomas and risk factors. A value, varying from 1 to 5 is attributed to each parameter, the sum of values give a score for each patient. This score allows the clinician to predict, within the early 48 hours, the vital prognosis.

[Semiology of spinal meningiomas and neurinomas (author's transl)].

The last 60 patient who underwent surgery for neurinoma or meningioma of the spine provide the basis for this report. One-fourth of all cases of spinal cord compression are due to meningioma or neurinoma. Attention is drawn to the characteristic clinical features of these tumors, particularly their time-course, since diagnosis if often delayed.

[Cystic dilatations of the subarachnoid space at the lumbo-sacral level. Clinical and therapeutic aspects].

The cystic dilation of the sub-arachnoidal space individualised by Tarlov in 1938, may be integrated in the diagnosis of non discal surgical sciatica. The classification proposed by Lazorthes sumes up the eventualities encountered at the lombo-sacral level. The clinical study of five personal observations and the analysis of literature enable the establishment of a clinical picture evoking the anomaly.

[Radio-anatomical study of the main trunk of the middle cerebral artery (author's transl)].

This work corroborates anatomical data well known since G. Lazorthes about the main trunk of the middle cerebral artery. The data are interesting in various fields: Sylvian aneurysms, big sphenoïd ridge meningiomas, extra-intra cranial micro neurosurgical anastomoses.