This study aimed to assess surface contamination levels of children’s playground equipment in two public parks in AL-Zawiya City, Libya (Jdayem Park and AL-Zawiya Park), using adenosine triphosphate (ATP) bioluminescence monitoring. The equipment surveyed included plastic slides, metal slides, iron swings, plastic swings, and rope swings. A total of 24 samples were collected from these surfaces using standardized ATP swabs, and results were classified based on established RLU thresholds (<100 RLU: clean, 100–300 RLU: marginally contaminated, >300 RLU: contaminated). The results revealed significant variability across equipment and surface types. The highest contamination level was observed on the iron swing at Jdayem Park (21–416 RLU), while the lowest levels were recorded on rope swings in AL-Zawiya Park (11–25 RLU). Plastic surfaces and rope swings generally exhibited lower contamination compared to metal surfaces, suggesting that surface material and design, combined with usage frequency, play a pivotal role in contamination accumulation. These findings align with previous studies that highlight the role of surface characteristics and environmental exposure in influencing microbial load. The results underscore the urgent need for targeted cleaning, disinfection, and regular quality

.monitoring of public playground equipment to maintain a safe, hygienic, and child-friendly recreational environment

Fishes are considered as good indicators of heavy metals pollution in aquatic ecosystem in addition to being a good source of protein. Thus the level of Mercury (Hg) in fish which become a health hazard, was examined. The aim of the study was to determine the concentrations of Hg in the studied tuna fish samples. Moreover, evaluation of associated health risks from fish consumption were conducted of which, the intake rates of Hg was gauged based on Hg concentrations in fish muscles and the rate of daily fish consumption by Libyan population. A total of Forty-five specimens (20 canned tuna samples, local and imported samples, five frozen tuna samples and 20 fresh tuna samples) were sampled from different markets, large commercial centers, and food distribution points in the Tripoli area. A quantity of 0.5 grams of muscle completely homogenized mixture of each canned, fresh, and frozen tuna were digested by a mixture of 5 ml of nitric acid and 5 ml of sulfuric acid. A cold vapor atomic absorption spectrometer was utilized for the tuna fish analysis. The results showed that the concentrations of Hg were at the limits set by WHO and FAO, except for three frozen tuna samples were higher than the safety limits for human consumption, (2.33, 0.64, and 1.45 mg/kg wet. weight), and one fresh tuna sample (0.51 mg/kg wet. weight). The results revealed that, the average concentration of Hg for canned, frozen, and fresh tuna samples were calculated as 0.12, 1.02, and 0.19 mg/kg wet weight, respectively. However, the target hazard quotient (THQ) for Hg was less than 1 in the analyzed canned, frozen, and fresh tuna samples indicating no potential health risks to the population in studied area. However, the risk of health effects is increased due to the presence of Hg in seafood. Therefore, groups most at risk, including young children, the elderly, and pregnant women, limit their consumption of certain types of seafood, especially tuna. further comprehensive monitoring programs should be conducted.

Professor Salem Aboglila                                                           

Geochemistry & Environmental Chemistry science Faculty – Azzaytuna University-Libya

Mobile : 00218913700361

            :00218923394183

Email: salem.aboglila@gmail.com 

Address: Salem Abdul Ghni Aboglila / TIP 52945, Aramex House Old Bath Road Colnbrook, Slough,Berkshire SL3 0NS 

Nov 2010 PhD degree Thesis title: Organic and Isotopic Geochemistry of Source-rocks and Crude Oils from the East Sirte Basin (Libya). Curtin University of technology (palaeoenvironment study)

Abstract: The Study aims to evaluate the quality of groundwater in the Ain Zara area, situated south of Tripoli, and assesses its suitability for drinking using the Canadian Water Quality Index (CCMEWQI) and the Weighted Arithmetic Index (WAWQI). A total of 40 well water samples were collected in March and April 2023, with GPS data collected for the wells and mapped accordingly. Key parameters measured included dissolved oxygen (DO), nitrite (NO2-), electrical conductivity (EC), total dissolved salts (TDS), pH, and concentrations of positive ions (Ca²⁺, Na⁺, K⁺, Mg²⁺) as well as negative ions (NO3-, SO4²-, Cl-, HCO3-). Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD) were calculated, with results compared against the Libyan Standard Specifications for Drinking Water No. 82 (2013). Analysis indicated an increase in TDS concentration in select samples, exceeding the maximum concentration (7100 mg/L) in well 10, alongside elevated sodium ion concentrations in wells (10, 11, 12, 13, 14, 16, 17, 18, 19, 32, 34, 35, 36, 37) and calcium ions in wells (7, 10, 13, 14, 15, 16, 17, 18, 32) and 35 in the northern and northwestern sections of the study area. Furthermore, increased concentrations of chloride and bicarbonate ions were observed in the wells to the north and northwest. Other parameters remained within the permissible limits according to the 2013 Libyan standard specifications. Wells (1, 2, 3, 6, 9, 21, 22, 23, 25, 26, 27, 28, 31, 38, 39, and 40), located in the southern and southeastern parts of the study area, were classified as excellent quality for drinking, according to both the CCMEWQI and WAWQI. In contrast, the remaining wells in the northern and northwestern areas were classified from good to acceptable to poor, rendering them unsuitable for drinking. The study demonstrated that both indices displayed similar spatial distributions.

Seven sedimentary rocks and seven crude oils undertook a geochemical analysis to describe their organic matter type and

then tag the Paleoenvironments based on the organic matter. The samples were collected from B1-NC151, A1-NC58, P1-

NC1, E1-NC174, D1-NC151, H29-NC115, and D1-NC174 boreholes, located in Murzuq Basin. The study was established to

understand life forms in the ecosystem based on biomarkers that biochemical techniques recognized. Microscopy was used

for kerogen typing and Spore Color Index reference. Organic matter (EOM) was extracted from cutting samples. Furthermore,

hydrocarbons were saturated and aromatic fractionated from the samples to investigate using Gas chromatograph system.

Spore color index (SCI), range between 1.5-3.5, Amorphous organic matter (AOM) from 42 to 95 percentage, Phytoclasts %

were 4-15.5, and Palynomorphs % range 0.5 to 7.5. The percentage of Carbon 85.66-86.29, Hydrogen 13.16-13.73, Nitrogen

0.06 -0.27, and Sulfur 0.31-0.70, besides wax were measured, ranging among 1.3 to 6.0 %. Pristine/n-C17, Phytane/n-C18,

Pristine/Phytane, carbon preference index measurements (CPI) and DBT/P as saturated hydrocarbon ratios from whole oil

chromatographs were established. Tricyclic terpanes, hopanes and n-alkanes were distinguishing as the most important oil

biomarkers that reserved the characteristics in the Paleoenvironments. 

Eighty-five rock samples corresponding to the Palaeozoic formations were taken from two wells in

the NC 200 Block of the Murzuq Basin. The study aimed to find out geochemical characteristics of

parameters and specific Gas Chromatography-Mass Spectrometry (GC-MS) biomarkers were 

applied to determine the potential hydrocarbon generation. Per se, Rocks are good sources and 

hold fair content of organic matter, crossing in the range of good accumulation, in which the very 

good source rocks have an organic carbon richness (TOC) reached of 3.7 wt%. The studied rocks 

are ranged from immature to late mature organic matter (OM) with total organic carbon richness 

(TOC) range between 0.4 – 3.7 wt%. Rock-Eval parameters S1, S2, S3, Tmax, S2/S3, OI, PI and HI 

of the source rock samples have values ranged from 0.02 – 0.3, 0.22 – 6, 0.36 – 4, 423 – 443, 24= 

350, 0 – 0.27 and 42 – 384 respectively. The range of hydrogen index (HI) related to oxygen index 

(OI) displays that all kerogen types from Type II to Type III are exist and increase with depth. The 

Tmax parameter is wide-ranging among studied formations, indicating different levels of organic 

matter maturity, from immature oil window and to late mature for the Devonian-Carboniferous and 

Silurian source rocks, associated with more depth. Molecular composition analysis of n-alkanes and 

other biomarkers supported the findings of Rock-Eval pyrolysis data, revealing varied hydrocarbon 

signatures across the formations. The Carbon isotope analysis (δ13C) suggested multiple sources 

contributing to the generated oil, including Type I to Type III kerogens. Silurian Bir Tlacsin/Tanezzuft Formations, the Devonian Awaynat Wanin/BDS II Formations, and

greetings, I Hope you are doing well. Professor. Salem Aboglila Head of the Department of Environmental Science School of Basic Sciences Libyan Academy for Postgraduate Studies Tripoli – Libya

https://wavejo.com/editiorial-board-mebers