Preparation and Using Modified Nanohydroxyapatite Molecules for Wastewater Treatment

The Influence of Groundwater Desalination by Modified Active Carbon/Bentonite on Its Application in Agriculture

It cannot be denied the importance of groundwater (Gw) as a source for irrigation. It is considered the only source of water in some locations such as newly reclaimed lands. However, the groundwater quality could be affected by salinity or heavy metals because of human activities or natural reasons. Thence, groundwater desalination comes to above as a part of the solution. In this study, the modified active carbon by inorganic iron polymer (Fex(OH)y) (Fe-AC) and bentonite (Ben) were used in groundwater desalination. The treatment process of 2 liters of groundwater was carried out by using a fixed-bed column where the flow rate was 120 mL/hour for each 20 grams sorbent. The results showed that the EC value of groundwater (2.54 dS/m) was reduced to 1.12 dS/m for treated groundwater (TGw) by Fe-AC/Ben mixture. Furthermore, the effect of irrigation by Gw and TGw was tested on the Faba bean and soil properties. The vegetative characters were significantly affected by irrigation by saline Gw while plant characters were much better after irrigation with TGw as well as soil chemical properties. Accordingly, the desalination of groundwater by Fe-AC/Ben mixture considers an effective and economic method that can be applied to reduce groundwater salinity and its impact on soil and crop.

Nanoadsorbents for water and wastewater remediation

Water has a wide-ranging effect on all aspects of human life, such as health and food. However, the water has often become polluted by the waste of our industrial, agricultural, and day-to-day activities due to the impact of humans. Therefore, there is an urgent need for new technologies to remove the contaminants from water and wastewater. Thence, many ways and techniques have been developed for water and wastewater remediation. Among all the methods of water and wastewater remediation techniques, the adsorption process has gained tremendous importance as a suitable water and wastewater remediation. The application of nanoadsorbent materials is a growing solution to solving this environmental problem. The unique physical and chemical properties of nanoadsorbents enhance their application due to its higher in ranking, status, and quality and beneficial in different fields compared to traditional adsorbents. Recently, numerous studies reported that the nanosorbent materials have a great and quite promising effect on water and wastewater treatment such as carbon tube, polymeric, zeolites, metal and metal oxides nanosorbents. Thus, the aim of this review article is to provide new data on the study and the improvement in this specific field, and to provide a version of the uses, benefits and restrictions of nanosorbents in water and wastewater remediation.