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Articles 1 - 11 of 11
Full-Text Articles in Physical Sciences and Mathematics
Alleviation Of Nickel-Induced Stress In Mungbean Through Application Of Gibberellic Acid, Muhammad A. Ali, Hafiz N. Asghar, Muhammad Y. Khan, Muhammad Saleem, Muhammad Naveed, Nabeel Khan Niazi
Alleviation Of Nickel-Induced Stress In Mungbean Through Application Of Gibberellic Acid, Muhammad A. Ali, Hafiz N. Asghar, Muhammad Y. Khan, Muhammad Saleem, Muhammad Naveed, Nabeel Khan Niazi
Dr Nabeel Khan Niazi
Nickel (Ni) is the most eco-toxic and harmful metal for soil biological activity, plant metabolism and health of animals and human beings. Elevated level of Ni in plants causes many nutritional and physiological disorders as well as perturbs in normal balance of phytohormones. Exogenous application of phytohormones can regulate plant growth and reduce inhibitory effect of toxic metals on plants. Therefore present study was conducted to assess the effect of Ni contamination on growth and yield of mungbean and role of gibberellic acid (GA3) to counteract negative effects of Ni contamination. Mungbean seeds were sown in potted soil contaminated with …
Exogenous Application Of Ethylenediamminetetraacetic Acid Enhanced Phytoremediation Of Cadmium By Brassica Napus L., M Farid, S Ali, W Ishaque, M Shakoor, Nabeel Niazi, I Bibi, M Dawood, R Gill, F Abbas
Exogenous Application Of Ethylenediamminetetraacetic Acid Enhanced Phytoremediation Of Cadmium By Brassica Napus L., M Farid, S Ali, W Ishaque, M Shakoor, Nabeel Niazi, I Bibi, M Dawood, R Gill, F Abbas
Dr Nabeel Khan Niazi
Performance of B. napus in phytoextraction—an in situ environment friendly technique for the cleanup of contaminated soils—was evaluated through its response to cadmium (Cd) toxicity in combination with a chelator ethylenediamminetetraacetic acid (EDTA) while growing hydroponically in greenhouse conditions under three levels of Cd (0, 10, and 50 µM) and two levels of EDTA (0 and 2.5 mM). Cadmium presence decreased plant growth, biomass and chlorophyll concentrations, while the application of EDTA enhanced plant growth by reducing Cd-induced effects in Cd-stressed plants. Addition of EDTA improved the net photosynthetic and gas exchange capacity of plants under Cd stress. Presence of …
Evaluation Of Spatial Variability Of Soil Arsenic Adjacent To A Disused Cattle-Dip Site, Using Model-Based Geostatistics, Nabeel Niazi, Thomas Bishop, Balwant Singh
Evaluation Of Spatial Variability Of Soil Arsenic Adjacent To A Disused Cattle-Dip Site, Using Model-Based Geostatistics, Nabeel Niazi, Thomas Bishop, Balwant Singh
Dr Nabeel Khan Niazi
This study investigated the spatial variability of total and phosphate-extractable arsenic (As) concentrations in soil adjacent to a cattle-dip site, employing a linear mixed model-based geostatistical approach. The soil samples in the study area (n = 102 in 8.1 m2) were taken at the nodes of a 0.30 × 0.35 m grid. The results showed that total As concentration (0-0.2 m depth) and phosphate-extractable As concentration (at depths of 0-0.2, 0.2-0.4, and 0.4-0.6 m) in soil adjacent to the dip varied greatly. Both total and phosphate-extractable soil As concentrations significantly (p = 0.004-0.048) increased toward the cattle-dip. Using …
Soil Contaminants: Sources, Effects And Approaches For Remediation, Ghulam Murtaza, Behzad Murtaza, Nabeel Niazi, Muhammad Sabir
Soil Contaminants: Sources, Effects And Approaches For Remediation, Ghulam Murtaza, Behzad Murtaza, Nabeel Niazi, Muhammad Sabir
Dr Nabeel Khan Niazi
The contamination of soils with various inorganic and organic contaminants led to the degradation of large expenses of urban and arable lands throughout the world. The presence of toxic contaminants poses a significant health risk to humans and other ecological systems. Scattered literature is harnessed to critically review the various natural and anthropogenic sources and potential hazards and to identify the best possible remediation strategies for a number of contaminants, mainly those inorganic in nature such as arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb), mercury (Hg), nickel (Ni), and zinc (Zn) commonly found in the contaminated soils. …
Letter To The Editor Regarding, “First Evidence On Different Transportation Modes Of Arsenic And Phosphorus In Arsenic Hyperaccumulator Pteris Vittata” By Lei Et Al. (2012), Nabeel Niazi, Anthony Kachenko
Letter To The Editor Regarding, “First Evidence On Different Transportation Modes Of Arsenic And Phosphorus In Arsenic Hyperaccumulator Pteris Vittata” By Lei Et Al. (2012), Nabeel Niazi, Anthony Kachenko
Dr Nabeel Khan Niazi
No abstract provided.
Mechanisms Of Metal-Phosphates Formation In The Rhizosphere Soils Of Pea And Tomato: Environmental And Sanitary Consequences, Annabelle Austruy, Muhammad Shahid, Tiantian Xiong, Maryse Castrec, Virginie Payre, Nabeel Niazi, Muhammad Sabir, Camille Dumat
Mechanisms Of Metal-Phosphates Formation In The Rhizosphere Soils Of Pea And Tomato: Environmental And Sanitary Consequences, Annabelle Austruy, Muhammad Shahid, Tiantian Xiong, Maryse Castrec, Virginie Payre, Nabeel Niazi, Muhammad Sabir, Camille Dumat
Dr Nabeel Khan Niazi
Purpose: At the global scale, soil contamination with persistent metals such as lead (Pb), zinc (Zn), and copper (Cu) induces a serious threat of entering the human food chain. In the recent past, different natural and synthetic compounds have been used to immobilize metals in soil environments. However, the mechanisms involved in amendment-induced immobilization of metals in soil remained unclear. The objective of the present work was therefore to determine the mechanisms involved in metal-phosphates formation in the rhizospheric soils of pea and tomato currently cultivated in kitchen gardens. Materials and methods: Pea and tomato were cultivated on a soil …
Mid-Infrared Spectroscopy And Partial Least-Squares Regression To Estimate Soil Arsenic At A Highly Variable Arsenic-Contaminated Site, Nabeel Niazi, Balwant Singh, B Minasny
Mid-Infrared Spectroscopy And Partial Least-Squares Regression To Estimate Soil Arsenic At A Highly Variable Arsenic-Contaminated Site, Nabeel Niazi, Balwant Singh, B Minasny
Dr Nabeel Khan Niazi
The potential of mid-infrared spectroscopy in combination with partial least-squares regression was investigated to estimate total and phosphate-extractable arsenic contents in soil samples collected from a highly variable arsenic-contaminated disused cattle-dip site. Principal component analysis was performed prior to mid-infrared partial least-squares analysis to identify spectral outliers in the absorbance spectra of soil samples. The mid-infrared partial least-squares calibration model (n = 149) excluding spectral outliers showed an acceptable reliability (coefficient of determination, R2c = 0.75 (P < 0.01); ratio of performance to interquartile distance, RPIQc = 2.20) to estimate total soil arsenic. For total soil arsenic, the validation of final calibration model using 149 unknown …
Arsenic Speciation And Phytoavailability In Contaminated Soils Using A Sequential Extraction Procedure And Xanes Spectroscopy, Nabeel Niazi, Balwant Singh, Pushan Shah
Arsenic Speciation And Phytoavailability In Contaminated Soils Using A Sequential Extraction Procedure And Xanes Spectroscopy, Nabeel Niazi, Balwant Singh, Pushan Shah
Dr Nabeel Khan Niazi
In this study, a sequential extraction procedure (SEP) and X-ray absorption near edge structure (XANES) spectroscopy were used to determine the solid-phase speciation and phytoavailability of arsenic (As) of historically contaminated soils from As containing pesticides and herbicides and soils spiked with As in the laboratory. Brassica juncea was grown in the contaminated soils to measure plant available As in a glasshouse experiment. Arsenic associated with amorphous Fe oxides was found to be the dominant phase using both SEP and XANES spectroscopy. Arsenic predominantly existed in arsenate (As V) form in the soils; in a few samples As was also …
Phytoremediation Potential Of Pityrogramma Calomelanos Var. Austroamericana And Pterris Vittata L. Grown At A Highly Variable Arsenic Contaminated Site, Nabeel Niazi, Balwant Singh, Lukas Van Zwieten, Anthony Kachenko
Phytoremediation Potential Of Pityrogramma Calomelanos Var. Austroamericana And Pterris Vittata L. Grown At A Highly Variable Arsenic Contaminated Site, Nabeel Niazi, Balwant Singh, Lukas Van Zwieten, Anthony Kachenko
Dr Nabeel Khan Niazi
In this study, the phytoextraction potential of Pityrogramma calomelanos var. austroamericana (gold dust fern) was compared with the well-known arsenic (As) hyperaccumulator, Pteris vittata L. (Chinese brake fern) at a disused cattle dip site in northern New South Wales, Australia. Geostatistical analysis showed that the concentrations of total (at 0–20 cm depth) and phosphate-extractable (at 0–20, 20–40 and 40–60 cm depths) As were spatially variable at the site and this extreme variability (< 1 m) was also evident in the spatial maps of As. Gold dust fern produced greater frond dry biomass (mean=130 g/plant; n=40) than Chinese brake fern (mean=81 …
Phytoremediation Of An Arsenic-Contaminated Site Using Pteris Vittata L. And Pityrogramma Calomelanos Var. Austroamericana: A Long-Term Study, Nabeel Niazi, B Singh, L Van Zwieten, A Kachenko
Phytoremediation Of An Arsenic-Contaminated Site Using Pteris Vittata L. And Pityrogramma Calomelanos Var. Austroamericana: A Long-Term Study, Nabeel Niazi, B Singh, L Van Zwieten, A Kachenko
Dr Nabeel Khan Niazi
This field study investigated the phytoremediation potential of two arsenic (As) hyperaccumulating fern species, Pityrogramma calomelanos var. austroamericana and Pteris vittata over 27-month duration at a disused As-contaminated cattle-dip site located at Wollongbar, NSW, Australia. Ferns planted in January 2009 were harvested following 10, 22 and 27 months of growth. A detailed soil sampling was undertaken in June 2009 (initial, n = 42 per plot) and limited sampling in April 2011 (after 27 months, n = 15 per plot) to measure total and phosphate-extractable As concentrations in soil at 0 − 20-, 20 − 40- and 40 − 60-cm depths. …
Phytoremediation Potential Of Pityrogramma Calomelanos Var. Austroamericana And Pteris Vittata L. Grown At A Highly Variable Arsenic Contaminated Site, Nabeel Niazi, Balwant Singh, Lukas Van Zwieten, Anthony Kachenko
Phytoremediation Potential Of Pityrogramma Calomelanos Var. Austroamericana And Pteris Vittata L. Grown At A Highly Variable Arsenic Contaminated Site, Nabeel Niazi, Balwant Singh, Lukas Van Zwieten, Anthony Kachenko
Dr Nabeel Khan Niazi
This study examined the phytoextraction potential of two arsenic (As) hyperaccumulators, Pteris vittata L. and Pityrogramma calomelanos var. austroamericana at a historical As-contaminated cattle dip site in northern New South Wales (NSW), Australia. Total As concentration in the surface soil (0–20 cm) showed a better spatial structure than phosphate-extractable As in the surface and sub-surface soil at this site. P. calomelanos var. austroamericana produced greater frond dry biomass (mean = 130 g plant−1) than P. vittata (mean = 81 g plant−1) after 10 months of growth. Arsenic concentration and uptake in fronds were also significantly higher in P. calomelanos var. …