Abdulrahman I. Alabdula’aly

King Abdulaziz City for Science and Technology | KACST · scientific council

The presence of organic compounds in drinking water is well recognized in many developing countries; however, the occurrence of organic contaminants in the groundwater of Saudi Arabia, which is the main source of drinking water in the country, is not well documented. A national comprehensive study was carried out to assess the occurrence of organic...

Water samples were collected from 53 locations of Riyadh water distribution network and analyzed for total coliform and heterotrophic plate counts in addition to temperature, turbidity, and residual free chlorine. Water temperature was found to vary between 29-39P o P C, turbidity between 0.02-2.9 NTU, and residual free chlorine between 0.4-0.7 mg/...

A water treatment composition capable of effectively adsorbing pollutants from water is described. The composition includes magnetic extractants, which comprise magnetite nanoparticles containing functional groups. The composition is used to remove from water and aqueous streams oils and other contaminants. A process for removing contaminants from...

A water treatment composition capable of effectively adsorbing pollutants from water is described. The composition includes magnetic extractants, which comprise magnetite nanoparticles containing functional groups. The composition is used to remove from water and aqueous streams oils and other contaminants. A process for removing contaminants from...

Samples were collected from 1025 wells supplying drinking water to the 13 regions of Saudi Arabia and analyzed for radon concentrations. The weighted radon median value for the entire country was found to be 4.62 Bq L�1 with a range of 0.01e67.4 Bq L�1. The percentage of samples with radon concentration equal to or greater than 11.1 Bq L�1 (US EPA...

The USEPA radionuclides regulations have spurred significant research efforts for developing better technology for radium removal from groundwater. The use of barium chloride to remove radium from groundwater is a promising technique. For that, laboratory experiments were carried out to evaluate the effectiveness of different barium chloride doses...

The presence of elevated levels of fluoride in groundwater is considered a global problem. Fluoride in water derives mainly from dissolution of natural minerals in the rocks and soils with which water interacts. The most common fluorine-bearing minerals are fluorite, apatite and micas. Anthropogenic sources of fluoride include agricultural fertiliz...

Granular activated carbon (GAC) has proven its effectiveness in removing radon from water supplies. Laboratory and pilot plant studies were carried out using three different types of activated carbons (F-300, F-400, and HD-4000) to remove radon from water supply. From the experimental kinetic study, the data indicated that at least 6 h are needed...

Contamination of groundwater by nitrate is considered a global problem. Nitrates are introduced in the groundwater from a variety of sources like agricultural activities, poor sewer system, wastewaters, and industrial activities. In the present research, a survey of wells (n = 1,060) was undertaken in all 13 regions of the Kingdom of Saudi Arabia t...

Pilot studies were undertaken to quantify the total activity of radon that is eluted following no-flow periods from several Ra-226 adsorbents loaded to near exhaustion. The adsorbents studied included two types of barium sulphate impregnated alumina (ABA-8000 and F-1) and Dowex MSC-1 resin treated by either barium hydroxide or barium chloride. In p...

Water samples were collected from 400 coolers in Riyadh area. From each cooler, one feed and one cooled water samples were collected. These samples were analyzed for trace metals like Al, Cr, Cu, Fe, Mn, Ni, Pb, and Zn by Inductively Coupled Plasma (ICP) Spectrophotometer equipped with ultrasonic nebulizer. Out of 400 coolers, water from 382 (95.50...

Funding scientific research is important for accelerating the progress of science and technology, to fulfill the development objectives of the country. King Abdul-Aziz City for Science and Technology (KACST) was established in 1977 to support and promote applied scientific research and coordinate the activities of the scientific research institutio...

Twenty-three rain water samples were collected from 15 sampling locations in Riyadh during four rain events in 1994 and analyzed for pH, conductivity, TDS, alkalinity, Cl, NO(3), F, SO(4), Na, Mg, Ca, and 12 trace metals. The pH ranged between 6.83 and 8.21. The major cation and anion were Ca and SO(4), contributing with 30.5% and 20. 8%, respectiv...

The capital of Saudi Arabia, Riyadh is supplied with drinking water from both treated groundwater and desalinated sea water. Groundwater contributes about 35% to the total water supply and is treated in six treatment plants containing cooling, softening, filtration, reverse osmosis and posttreatment processes. An extensive two and a half years stud...

The removal efficiency of moderate levels of radon from groundwater supplies was evaluated using the diffused bubble aeration technique. An aeration system was designed, constructed and operated for that purpose. The effect of air-to-water ratio and detention time on radon removal were evaluated through 32 runs. The possibility to reduce the radon...

Radon levels were measured in eight water supply municipalities of the Central Region of Saudi Arabia. Samples were collected from 77 wells and 6 treatment plants supplying drinking water to over 500 000 inhabitants. The well water radon level was in the range of 0.89– 35.44 Bq/l with an overall weighted geometric mean value of 8.80 Bq/l. Most of t...

Fourteen domestic and seven imported bottled water brands were analysed in Saudi Arabia for various physico-chemical water quality parameters. The results of the analysis were compared with the drinking water standards set by Saudi Arabia and World Health Organization. The levels of different physico-chemical parameters like TDS, Ca, Mg, Na, K, NO3...

Trace metals were assessed in the raw and product waters of 8 water treatment plants in Riyadh, Buraydah and Unayzah (Saudi Arabia). Samples were analyzed for 12 trace metals by inductively coupled plasma spectrophotometer (ICP). All the detected metals were within the permissible limits of WHO. Cd, Ni and Se were absent in all plant waters. It was...

The capital city of Saudi Arabia, Riyadh, relies on both desalinated sea water as well as treated groundwater to meet all its water requirements. About 66% of the water demand is met by desalinated sea water, and the remaining is supplied by six groundwater treatment plants located in the vicinity of the city and supplied with water from 161 wells....

Riyadh, Saudi Arabia is supplied with drinking water fromboth desalinated sea water and treated groundwater sources. Sampleswere analysed for NO3 from selected deep and shallow wells, two locations within the city's six groundwater treatment plants, thedesalinated sea water and distribution network. Average nitrateconcentrations (as NO3) were 8.2 a...

Trace metal concentrations in the Riyadh water supplies were assessed. Samples were collected from groundwater wells, product waters of treatment plants, and the distribution network. These samples were analyzed for 10 trace metals. Trace metal concentrations in the product waters were within the drinking water standard limits. Aluminum concentrati...

Groundwater supplies about 34% ofthe total water demand for the capital city of SaudiArabia, Riyadh. The other 66% is desalinatedseawater. The fluoride level in Riyadh drinking watersupplies was evaluated. Samples were collected fromselected wells, treatment plants, desalinatedseawater, distribution network and 19 locally producedand imported bottl...

Saudi Arabia is the world largest producer of desalted water. Based on tlle 1992 statistics, Saudi Arabia has more than 30% of the total world desalting units producing more than 4000 m3/day and more than 24% of the world desalting units producing more than 100 m3/day. Most of the Saudi desalination plants are of multi-stage flash type, MSF. Saudi...

A study of 222Rn levels in the ground water supplies of the capital city of Saudi Arabia (Riyadh) was carried out. Such sources contribute up to 34% of the total city water demand. Samples were collected from 90 wells (75 deep and 15 shallow) out of 161 that supply water to six water treatment plants and from three locations within each plant. All...

The microbiological quality of sixty six bottled water samples representing 14 locally produced and six imported brands in Saudi Arabia have been examined for total coliform and heterotrophic plate count using membrane filtration method. Three local brands of large capacity (10–20 liters) were also used to observe the storage effect for 75 days. No...

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In an effort to search for the best available technology and solve current problems to treat groundwater supplies for drinking purposes in the central region of Saudi Arabia, King Abdulaziz City for Science and Technology (KACST) has initiated a program in the area of groundwater treatment. The program included the design, construction and operatio...

Groundwater is the main supply of water used in the Central Region of Saudi Arabia. With the exception of the capital city Riyadh, major cities in the region depend entirely on treated groundwater for drinking purposes. The groundwater of the region is characterized by high levels of TDS, with calcium, chloride, sodium, and sulfate being the domina...

Assessment of trace metals in ground water used for drinking purposes in Riyadh region in the kingdom of Saudi Arabia was carried out. Samples were collected from 200 wells supplying drinking water to the inhabitants in the region. All samples were analyzed for 17 trace and macro elements (Al, As, Ba, Be, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, Mo, Ag, Hg,...

Trace metals were assessed in the raw and product waters of 8 water treatment plants in Riyadh, Buraydah and Unayzah (Saudi Arabia). Samples were analyzed for 12 trace metals by inductively coupled plasma spectropho-tometer (ICP). All the detected metals were within the permissible limits of WHO. Cd, Ni and Se were absent in all plant waters. It wa...