The water footprint of modern consumer society / Arjen Y. Hoekstra. Routledge, March 2013,  208 p. ISBN 978-1-84971-427-3 - £23 http://www.routledge.com/books/details/9781849714273 Presentation (© Routledge) : Water is not only used in the domestic context, but also in agriculture and industry in the production of commercial goods, from food to paper. The water footprint is an indicator of freshwater use that looks at both direct and indirect use of water by a consumer or producer. The wat...

The water footprint of modern consumer society

Spatial distribution of heavy metals for environmental and agricultural assessment in Badinan province, Kurdistan Region, Iraq

Samples of municipal waste water was taken and subjected to biological nitrogen transformation (BNT) of ammonification nitrification, and denitrification processes in order to remove the excesses level of harmful nitrogen forms and to improve physio-chemical properties of wastewater. Results revealed that the BNT is efficient in removing all forms of Nitrogen from waste water, especially in end of denitrification process, nitrite reduced about 96% and nitrate reduced to 75%. nitrification process can convert about 17 % to nitrate in one-month period while in the end of denitrifying process this range was elevated to 40 %. Total Kjeldahl nitrogen reduced by ammonification about 17%, and nitrifying bacteria are able to convert about 74% of total Kjeldahl nitrogen to nitrate. the denitrifying bacteria are able to convert this nitrate to gaseous form of nitrogen and to remove 92% of total Kjeldahl nitrogen. Different BNT process were able to reduce 24%, 64%, and 81% of organic nitrogen by ammonification, nitrification, and denitrification respectively. The COD/ N is 1 and the nitrogen removal efficiency is high. BNT is efficient in reducing TS, TSS, and TDS in the water was brought to the excellent ranges for drinking water between 50-150 mg/l. Regarding hardness, hard wastewater higher than 350 mg/l removed significantly by all BNT to bring it to soft water 180 mg/l in the end of experiment. Alkalinity was elevated by the BNT as CO3 react with H coming from nitrification to form more HCO3 ions in the water. EC values during whole experiment were changed about 10 units to return to its natural values around 160 ds.m-1 as the soluble salts cannot be removed by BNT. Turbidity of waste water was significantly removed by BNT process as microbes decompose the majority of total suspended and dissolved solid that create the turbidly.

https://iopscience.iop.org/article/10.1088/1755-1315/1120/1/012036/pdf

Biological Nitrogen Transformation Efficiency in Removing Nitrogen and Improving Water Quality from Zakho Municipal Wastewater in Kurdistan Region/Iraq

Samples of water were collected from the Khabur River in Zakho city in Iraqi Kurdistan Region in three seasons, the summer, autumn, and winter of 2021, at three different locations, before arriving at the city, inside the city, and after passing the city, and some Physio-chemical properties of water were determined to evaluate the spatial and seasonal variation effects on the renowned Khabur River properties. The result revealed the dissolved oxygen DO, biological oxygen demand is significantly (p<0.01) influenced by the summer season than autumn and winter, as the high temperature minimizes the dissolvability of oxygen necessary for life in the water, however, the level of BOD in Khabur river in three seasons not exceeded the recommended level of WHO and Iraqi slandered 3 mg/l. The pH of the Khabur River is not significantly affected by seasonal changes, while EC is significantly affected by seasonal variation. The alkalinity of the Khabur River is significantly higher in summer than in autumn and winter, and the opposite of almost all the studied parameters that increased in winter. The river has a total hardness greater than 200 mg/l as well as total calcium and magnesium. Hardness is significantly high in winter, as the dissolution of both Ca and Mg from bedrock and soil is increased by the action of heavy rainfall on the eroded soil. Regarding the spatial variation, the most studied parameters of the Khabur deteriorated when the river enters Zakho city, as approximately all the sewage water of this city is discharged into the river without any proper treatment.

https://iopscience.iop.org/article/10.1088/1755-1315/1120/1/012033/pdf

Influences of Spatial and Seasonal Variation on Khabur River Pollution by Municipal Wastewater in Zakho District, Iraq Kurdistan Region

Drinking water samples were taken from 18 villages around Zakho district, Kurdistan region, Iraq in annual seasons of 2018 year and chemical analysis of most important water quality parameters were carried out. Water temperature is varied about 13.2°C to 18.7°C, four villages have slight acidic water while other 15 locations are tend to be slight alkaline and highest pH value reaches 8.4, electrical conductivity (µs/cm) is over the permissible values of standard drinking water in two villages and high in 4 location while normal in the rest 13 locations, statistical analysis of dissolved oxygen ranges between 6.73 - 8.40 mg/l, statistical analysis of total hardness revealed that the all villages around Zakho district have hard to intensive hard water over 500 mg/l and gives them a slight bitter taste, calcium hardness gives extremely ranges between 72-392 mg/l, and Mg hardness between 39-250 mg/l, statistical analysis of chloride shows is around 250 mg/l which is typical standard for drinking water, SO4 is low and their means located between 18-58 mg/l and NO3 not exceeded 5 mg/l along year months reflecting their purity from pollution. The content of heavy metals Cd, Cu, Mn, Zn, Fe, Ag, Ni, Cr, Co, are below maximum permissible WHO guidelines and save for drinking while lead is over WHO permissible levels in this rank Mala> Jajoe >Easlam> Bntate> Banee villages and considered a dangerous indicators for drinking water quality in these villages.

Ahmed Al-Barwary

Papers

Seasonal variation of some chemical quality indicators of drinking water from selected villages around Zakho district Kurdistan region Iraq