This page has only limited features, please log in for full access.

Unclaimed
Zeeshan Ajmal
Key Laboratories for Clean Utilization of Renewable Energy, College of Engineering, China Agricultural University, 100083 Beijing, China

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 23 January 2021 in Surfaces and Interfaces
Reads 0
Downloads 0

Porous flowers-like magnesium oxide (MgO) was prepared using a facile and low-cost method. The structure, morphology and pore properties of prepared MgO were investigated. The results revealed that as-prepared MgO possesses hierarchical flowers-like structural features with a large surface area of 117.48 m2 g−1. Excellent adsorption capacity, towards phosphate and methyl orange, was exhibited by the fabricated MgO having an adsorption capacity of 724 mg g−1 and 1715 mg g−1 for phosphate and methyl orange respectively. The experimental data better fitted the pseudo-second-order and Freundlich isotherm model demonstrating multilayer adsorption of pollutants onto MgO adsorbent with endothermic nature. In five consecutive adsorptions/desorption cycles, the regenerated particles retained their adsorption performance. This work provides a pathway for the large-scale development of efficient adsorbent materials to overcome the sustainable problems.

ACS Style

Saeed Ahmed; Habib Ur Rehman; Zahid Ali; Abdul Qadeer; Abdul Haseeb; Zeeshan Ajmal. Solvent assisted synthesis of hierarchical magnesium oxide flowers for adsorption of phosphate and methyl orange: Kinetic, isotherm, thermodynamic and removal mechanism. Surfaces and Interfaces 2021, 23, 100953 .

AMA Style

Saeed Ahmed, Habib Ur Rehman, Zahid Ali, Abdul Qadeer, Abdul Haseeb, Zeeshan Ajmal. Solvent assisted synthesis of hierarchical magnesium oxide flowers for adsorption of phosphate and methyl orange: Kinetic, isotherm, thermodynamic and removal mechanism. Surfaces and Interfaces. 2021; 23 ():100953.

Chicago/Turabian Style

Saeed Ahmed; Habib Ur Rehman; Zahid Ali; Abdul Qadeer; Abdul Haseeb; Zeeshan Ajmal. 2021. "Solvent assisted synthesis of hierarchical magnesium oxide flowers for adsorption of phosphate and methyl orange: Kinetic, isotherm, thermodynamic and removal mechanism." Surfaces and Interfaces 23, no. : 100953.

Review article
Published: 19 April 2020 in Advances in Colloid and Interface Science
Reads 0
Downloads 0

Semiconductor photocatalysis is regarded as most privileged solution for energy conversion and environmental application. Recently, photocatalysis methods using bismuth-based photocatalysts, such as BiPO4, have been extensively investigated owing to their superior efficacy regarding organic pollutant degradation and their further mineralization into CO2 and H2O. It is well known that BiPO4 monoclinic phase exhibited better photocatalytic performance compared to Degussa (Evonik) P25 TiO2 in term of ultraviolet light driven organic pollutants degradation. However, its wide band gap, poor adsorptive performance and large size make BiPO4 less active under visible light irradiation. However, extensive research works have been conducted in the past with the aim of improving visible light driven BiPO4 activity by constructing a series of heterostructures, mainly coupled with π-conjugated architecture (e.g., conductive polymer, dye sensitization and carbonaceous materials). However, a critical review of modified BiPO4 systems using π-conjugated materials has not been published to date. Therefore, this current review article was designed with the aim of presenting a brief current state-of-the-art towards synthesis methods of BiPO4 in the first section, with an especial focuses onto its crystal-microstructure, optical and photocatalytic properties. Moreover, the most relevant strategies that have been employed to improve its photocatalytic activities are then addressed as the main part of this review. Finally, the last section presents ongoing challenges and perspectives for modified BiPO4 systems using π–conjugated materials.

ACS Style

Y. Naciri; A. Hsini; Z. Ajmal; J.A. Navío; Bahcine Bakiz; A. Albourine; M. Ezahri; A. Benlhachemi. Recent progress on the enhancement of photocatalytic properties of BiPO4 using π–conjugated materials. Advances in Colloid and Interface Science 2020, 280, 102160 .

AMA Style

Y. Naciri, A. Hsini, Z. Ajmal, J.A. Navío, Bahcine Bakiz, A. Albourine, M. Ezahri, A. Benlhachemi. Recent progress on the enhancement of photocatalytic properties of BiPO4 using π–conjugated materials. Advances in Colloid and Interface Science. 2020; 280 ():102160.

Chicago/Turabian Style

Y. Naciri; A. Hsini; Z. Ajmal; J.A. Navío; Bahcine Bakiz; A. Albourine; M. Ezahri; A. Benlhachemi. 2020. "Recent progress on the enhancement of photocatalytic properties of BiPO4 using π–conjugated materials." Advances in Colloid and Interface Science 280, no. : 102160.

Journal article
Published: 29 March 2020 in Journal of Colloid and Interface Science
Reads 0
Downloads 0

Well-crystallized Ca3(PO4)2 doped and un-doped nano-particles with the maximum strontium content (40 wt% Sr) followed by calcination at 800 °C for 3 h were synthesized via facile co-precipitation method. DTA/TGA, X-ray diffraction (XRD), energy dispersive scanning electron microscopy (SEM/EDX), UV–vis diffuse reflectance spectrum (UV–vis DRS), Raman spectroscopy and photoluminescence (PL) techniques were used for material characterization. The (XRD) patterns of as-synthesized Sr-doped Ca3(PO4)2 solid solution samples exhibited a systematic shift toward lower angles by possessing a single rhombohedral crystal structure without any secondary phases. The UV light driven photocatalytic activity was assessed for rhodamine B (RhB) degradation. As a result, ultrafast photodegradation activity was observed after Sr doping. Moreover, the 30 wt% Sr-Ca3(PO4)2 sample showed the highest photocatalytic degradation among the Sr-doped Ca3(PO4)2 samples toward RhB. It was further suggested that as-synthesized 30 wt% Sr-Ca3(PO4)2 superior photocatalytic performance is ascribed to the more proficient partition of photogenerated electron-hole pairs. Furthermore, the involved mechanism of superior photocatalytic performance of the 30 wt% Sr-Ca3(PO4)2 solid solution was also investigated. In addition, regeneration cycles indicated the higher stability of the photocatalyst to be effectively recycled up to four times without any considerable reduction in photocatalytic performance. Thus, these informations further provides us a scalable pathway to fabricate Sr doped Ca3(PO4)2 and its consequent use as an efficient photocatalyst for rhodamine B (RhB) contaminated wastewater treatment.

ACS Style

Y. Naciri; A. Hsini; Z. Ajmal; A. Bouddouch; Bahcine Bakiz; J.A. Navío; A. Albourine; J-C. Valmalette; M. Ezahri; A. Benlhachemi. Influence of Sr-doping on structural, optical and photocatalytic properties of synthesized Ca3(PO4)2. Journal of Colloid and Interface Science 2020, 572, 269 -280.

AMA Style

Y. Naciri, A. Hsini, Z. Ajmal, A. Bouddouch, Bahcine Bakiz, J.A. Navío, A. Albourine, J-C. Valmalette, M. Ezahri, A. Benlhachemi. Influence of Sr-doping on structural, optical and photocatalytic properties of synthesized Ca3(PO4)2. Journal of Colloid and Interface Science. 2020; 572 ():269-280.

Chicago/Turabian Style

Y. Naciri; A. Hsini; Z. Ajmal; A. Bouddouch; Bahcine Bakiz; J.A. Navío; A. Albourine; J-C. Valmalette; M. Ezahri; A. Benlhachemi. 2020. "Influence of Sr-doping on structural, optical and photocatalytic properties of synthesized Ca3(PO4)2." Journal of Colloid and Interface Science 572, no. : 269-280.

Journal article
Published: 14 November 2019 in Sustainable Cities and Society
Reads 0
Downloads 0

Lahore and Faisalabad are two highly populated metropolitans of Pakistan. The increasing number of vehicles and urbanization resulted in the contamination of urban road dust with heavy metals, which can expose residents to health hazards. The aim of this research was to determine the road dust heavy metal (Cu, Ni, Cd, Pb, and Zn) concentrations, their distribution, comparison, and their potential health risk assessment for local people. Herein, two sampling methods, namely deposit gauge method (DGM) and sweeping tools method (STM), were used to collect road dust samples in eight similar major road intersections. Dust collected by DGM (gravitational pull of air dust) showed higher heavy metals concentration than STM in both cities, which might be associated to the smaller dust particles collected in the DGM. Among sites, concentrations of heavy metals were the highest in dust obtained from the General Bus Stand in both cities. Dominant metals were Zn and Pb with an average concentration of 95.5 and 56.8 mg kg−1, respectively while Cd was the lowest in Lahore. Similarly, the concentration of Pb and Zn were also high in Faisalabad with an average of 90.4 and 49.5 mg kg−1 and Cd was the lowest. Overall, Lahore showed higher pollution levels than Faisalabad. The risk assessment results of the DGM indicated that there were potential carcinogenic health risks associated with Cd, as his values were close or exceeded the permissible limit of 1 × 10−4. Non-carcinogenic risk assessment results were lower than value 1 for both cities which means there were no non-carcinogenic hazards for the residents. Higher Enrichment ratio (ER) and geo accumulation index (Igeo) showed increasing heavy metal pollution in both cities is a serious concern. Therefore this research provides a vital base and help to authorities for pollution control strategies, remediation, and regular monitoring in order to improve eco-sustainable cities and health of urbanites.

ACS Style

Abdul Qadeer; Zulfiqar Saqib; Zeeshan Ajmal; Chen Xing; Saira Khan Khalil; Muhammad Usman; Yanping Huang; Safdar Bashir; Zulfiqar Ahmad; Saeed Ahmed; Khalid Hussain Thebo; Min Liu. Concentrations, pollution indices and health risk assessment of heavy metals in road dust from two urbanized cities of Pakistan: Comparing two sampling methods for heavy metals concentration. Sustainable Cities and Society 2019, 53, 101959 .

AMA Style

Abdul Qadeer, Zulfiqar Saqib, Zeeshan Ajmal, Chen Xing, Saira Khan Khalil, Muhammad Usman, Yanping Huang, Safdar Bashir, Zulfiqar Ahmad, Saeed Ahmed, Khalid Hussain Thebo, Min Liu. Concentrations, pollution indices and health risk assessment of heavy metals in road dust from two urbanized cities of Pakistan: Comparing two sampling methods for heavy metals concentration. Sustainable Cities and Society. 2019; 53 ():101959.

Chicago/Turabian Style

Abdul Qadeer; Zulfiqar Saqib; Zeeshan Ajmal; Chen Xing; Saira Khan Khalil; Muhammad Usman; Yanping Huang; Safdar Bashir; Zulfiqar Ahmad; Saeed Ahmed; Khalid Hussain Thebo; Min Liu. 2019. "Concentrations, pollution indices and health risk assessment of heavy metals in road dust from two urbanized cities of Pakistan: Comparing two sampling methods for heavy metals concentration." Sustainable Cities and Society 53, no. : 101959.

Journal article
Published: 06 September 2016 in Water
Reads 0
Downloads 0

Ammonium stripping has gained increasing interest for nitrogen recovery in anaerobically digested effluents. However, the stripped effluents often still do not meet discharge standards, having high pH and residual pollutants. Constructed wetlands (CWs) are an easy to operate ecosystem and have a long history of application in treatment of wastewaters with extreme pH, such as acid mine drainage. However, knowledge of the mechanistic details involved in the use of CWs to treat high alkaline drainage, such as stripped effluent, is insufficient. This study explored the feasibility and effectiveness of using three sub-surface horizontal flow CWs to treat high alkaline stripped effluent (pH > 10). Two intensification strategies—intermittent aeration and effluent recirculation—were evaluated to enhance nitrogen depuration performance. The results show that the treatment of alkaline stripped effluent is feasible due to the high buffering capacity of the wetlands. Effluent recirculation combined with intermittent artificial aeration improves nitrogen removal, with 71% total nitrogen (TN) removal. Ammonia volatilization from the surface of the wetlands in high alkaline conditions only contributed to 3% of the total removed ammonium. The microbial abundance and activity had significant diversity for the various enhancement strategies used in the constructed wetland systems. Anammox is an important process for nitrogen removal in CWs treating alkaline stripped effluent, and possible enhancements of this process should be investigated further.

ACS Style

Keli He; Tao Lv; Shubiao Wu; Luchen Guo; Zeeshan Ajmal; Hongzhen Luo; Renjie Dong. Treatment of Alkaline Stripped Effluent in Aerated Constructed Wetlands: Feasibility Evaluation and Performance Enhancement. Water 2016, 8, 386 .

AMA Style

Keli He, Tao Lv, Shubiao Wu, Luchen Guo, Zeeshan Ajmal, Hongzhen Luo, Renjie Dong. Treatment of Alkaline Stripped Effluent in Aerated Constructed Wetlands: Feasibility Evaluation and Performance Enhancement. Water. 2016; 8 (9):386.

Chicago/Turabian Style

Keli He; Tao Lv; Shubiao Wu; Luchen Guo; Zeeshan Ajmal; Hongzhen Luo; Renjie Dong. 2016. "Treatment of Alkaline Stripped Effluent in Aerated Constructed Wetlands: Feasibility Evaluation and Performance Enhancement." Water 8, no. 9: 386.