Removing of Heavy Metals from Sewage Water Using Chitosan Extracted from Crustacean Waste

The biological role of chitosan which was prepared by chemical method from shrimp waste Penaeus semisulcatus and the outer skeleton for marine crab Portunus pelagicus in some industrial and agricultural applications were studied. The concentration of prepared chitosan was 1% (w/v) at pH (4 and 8) for 12 hours in precipitation and chelating heavy metals (Lead, Zinc, Iron, Cupper and Cadmium) from of sewage water. Concentration of elements was measured by Flame Atomic Absorption Spectrophotometer ) FAAS). The results of the study indicated that the concentration of the water elements was high before treated with chitosan. The results showed a significant (p<0.05) decrease in element concentration percentage after treated with crab chitosan. In contrast, shrimp chitosan displayed a minimum effect on decreasing the amount of heavy metals. Moreover, the results showed that the higher percentage for mineral adsorption was at pH (4 as compared with 8). The results confirmed the possibility of using chitosan in chelate and precipitate the mineral ions from polluted water.

Effect of using non - conventional and traditional organic wastes on some physical properties of clay soil and peanut productivity in Akkar Plain

This research was conducted in 2016c, at the Zahid Western Research Station in Akkar Plain region of Tartous Governorate, the objective of this research is study the effect of non-conventional organic waste (compost of garbage, sewage sludge) and cow manure on the physical properties of clay soil in the region. Wastes was added to the soil at a rate of (0 - 10 - 20 – 30) t/ha, in order to determine the effect of the difference in the quantity added on physical properties of the soil and peanut productivity.

Investigation of spatial & temporal variations of nutrient in the coastal Water of Banias city

Half quarterly water samples were collected during the period between March 2015 and February 2016 of four different stations from Banias city water that is subject to the effect of sewage and estuaries. The concentrations of nutrients (H3SiO4 -, PO4 -3, NO3 -, NO2 - , NH4 + ) and the concentrations of chlorophyll a were determined to find out how affected by the temporal and spatial variability. The highest concentrations of phosphate and ammonia ions were observed at station St3 (close to the sewage), while the highest concentrations of nitrate ions were registered at the stations St1 and St2 (estuaries). The results showed high values of chlorophyll a in April (due to spring bloom of phytoplankton) and October (autumn bloom). The ions ratio ΣN/P revealed that phosphorus ions are limiting factor of the phytoplankton growth at St1 and St2, and that nitrogen ions are limiting factor of growth at the stations St3 and St4. The ratio Si/ΣN revealed that silicate ions are limiting factor of the growth of diatoms in all the stations.

The Syrian Water Situation – An Analytical Study with Future Prospects

This research aims to shed a light on the current state of the Syrian water resource through studying the present resources and analyzing the demand on them and their availability during the period (1992-2012). This study focues at deriving the future forecast on the development of the demand on these resources in order to better conceptualize their current state. This in turn will lead to concluding a set of results and recommendations that could contribute to improve the state of the water resource in the sense of achieving sustainability and prohibiting its depletion through the efficient and planned usage.

Effects of Sewage Sludge Application on Dry Biomass and Wood Volume of Eucalyptus Camaldulensis Plantation in Fedio (Lattakia)

This study was carried out during 2013 – 2015 and aimed to assess the effects of applying dry sewage sludge on dry biomass production and wood volume of Eucalyptus camaldulensis plantation established on sandy soil in Fedio plantation-Lattakia at April - 2013. Four experimental treatments were compared at age 22 months: SS1 (sewage sludge 3 kg/tree), SS2 (sewage sludge 6 kg/tree), MF (mineral fertilizer), and C (no fertilizer applications). Aboveground dry biomass production and wood volume in the SS1 treatment were about 107.60 t/ ha and 121.13 m3/harespectively, MF treatment (87.52 t/ha, 96.98 m3/ha) and SS2 treatment (91.12 t/ha, 103.42 m3/ha)and higher than in the control treatment (43.89 t/ha, 51.32 m3/ha ).

The Effect of Applying Sewage Sludge on Biomass Production and Wood Volume of Eucalyptus camaldulensis

Generally, sewage sludge is dumped into sanitary landfills, even though its use in forest stands as a fertilizer and soil conditioner might be an interesting option. However, sewage sludge must be applied with care to avoid soil and water pollution. The aim of this study was to assess the effects of applying dry sewage sludge on wet biomass production and wood volume of short rotation Eucalyptus camaldulensis plantation established on sandy soil in Fedio plantation.

Microbiology pollution in some irrigated agricultural vegetables with treatment sewage from Sheikh Saeed station

The research was conducted with the aim of investigating in the most important pathogens (coliform_ E.coli_ Salmonella), which moves from irrigation water to many types of vegetables which irrigated from it. And compared the extent of contamination by irrigation source (treatment sewage, wells), and according to the type of vegetable (fruit plants, tuberous vegetables), and the irrigation method(surface irrigation, modern irrigation).

Visual Analysis of Flocculation by Microthrix parvicella

Visual analysis of flocculation caused by the bacteria Microthrix parvicella isolated from domestic sewage was studied in the laboratory using synthetic sewage with the addition of different coagulants: FeCl٣, AICI٣, AI٢ (SO٤)٣ and FeSO٤.