This study investigates the accumulation and distribution of nickel in Arundo donax L. parts to assess the potential use of this plant in phytoremediation of Ni-contaminated soils. The effect of ethylene diamine tetra-acetic acid (EDTA) and nutrient solution containing NPK on the plant was proped. A 35-day pot experiment was performed in the laboratory and the pots were irrigated with Ni-contaminated solution combined or not with EDTA and NPK. The growth of plants was evaluated at the end of the experiment. The accumulation of Ni was analyzed by atomic absorption spectroscopy (AAS). The obtained results indicate that the plant was able to survive with high Ni content. The growth and the concentrations of Ni in the plant tissues were less affected. In the absence of the amendments, Ni was accumulated in the stems and leaves. However, the addition of NPK significantly reduced Ni concentration in the stems and leaves. The application of EDTA enhanced Ni uptake in roots. The translocation factor (TF) was greater than 1, which categorizes A. donax L. as a great candidate for Ni phytoextraction. A. donax L. is suitable for phytoremediation of Ni. This investigation contributes to the studies on the potential of phytoremediation technologies in Algeria.

The present work aims to study the physical, mineral and chemical properties of carbide lime residues for assessment as an acidic soil modification. Lime carbide waste is a byproduct of an acetylene generation plant located in Reghaia, east of Algiers, Algeria. This residue offers an effective and economical solution in the field of environmental protection, especially as raw materials for wastewater treatment and soil enrichment. Metallic content was studied using X-ray fluorescence (CubiX XRF/PANalytical). Toxic minerals was analyzed by atomic absorption spectroscopy (AAS). According to the comparative study, the characterization and total concentrations of minerals are significantly low and do not exceed the limit values for hazardous wastes and are in line with the standard recommendations of the agricultural field. Lime can be used both environmentally and economically as an amendment to stabilize acidic soils.

This work aims to a detailed study of the different biological activities of two extracts, ethanolic and aqueous extract, obtained from the aerial part of Matricaria chamomilla L. grown North West Algerian. Total phenolic and flavonoid contents were determined. HPLC was used to determine the quantity of phenolic compounds in these extracts. The results showed that the antioxidant, antimicrobial and anti-inflammatory activities were higher in the Aqueous Extract (AEC) in comparison with the ethanolic extract of chamomile. The AEC contained chlorogenic acid with a greater amount of other ingredients (2.45 mg/g). This plant had an antioxidant activity with IC50 values equal to 65.199 ?g/ml for AEC and 102.90 ?g/ml for the EEC. The AEC had an antimicrobial activity against Escherichia coli, and Candida albicans with a diameter of inhibition zone equal to 16.33 and 15.66 mm, respectively. Matricaria chamomilla was practically nontoxic with a median lethal dose (LD50) equal to 3800 mg/kg of EEC and superior to 5000 mg/kg of AEC). The Carrageenan method was used in the test of the anti-inflammatory activity which gave the best inhibition of edema, 86.30% at (100 mg/kg) after 6h of induced Carrageenan.