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81.
Ashraf MY Azhar N Ashraf M Hussain M Arshad M 《Journal of environmental biology / Academy of Environmental Biology, India》2011,32(5):659-666
Canola (Brassica napus L.) is commonly used as a hyper-accumulator for phytoextraction of heavy metals from soil and water. Like many other heavy metals, lead (Pb) contaminates soil, water and air and thus it is a great problem. This study was conducted to investigate toxic effects of Pb on growth and nutrient uptake in four canola cultivars. Each of four cultivars of canola (Con-II, Con-III, Legend and Shiralee) was subjected to four levels of Pb (0, 30, 60 and 90 mg Pb kg(-1) of soil) from lead chloride [PbCl2]. Due to Pb toxicity, plant growth was adversely affected and relatively a severe reduction in root biomass (45.7%) was recorded. The Pb accumulation increased both in shoot and root, the highest being in root. The uptake of different nutrients, i.e., N, P, K, Ca, Mg, Zn, Cu and Mn was reduced (38.4, 32.8, 33.1, 49.6, 7.78, 52.0, 42.6 and 45.9%, respectively) in the shoots and that of N, Fe, Zn, and Cu in the roots (48.5, 33.2, 24.3 and 44.8%, respectively) of all canola cultivars. The root K, P, Zn and Mn and shoot P, Mg and Fe contents were less affected, the concentration of Pb, Ca and Mg in roots of all cultivars. Among canola cultivars Con-II and Con-III performed better than Legend and Shiralee in terms of growth (26.03%) and nutrient accumulation. Overall, plant growth and nutrient accumulation in the canola cultivars was hampered due to the presence of Pb. 相似文献
82.
M. Waseem Mumtaz Ahmad Adnan Hamid Mukhtar Khalid Nawaz Ahtisham Raza Zahoor Ahmad 《Environmental monitoring and assessment》2011,172(1-4):581-587
The present work deals with the assessment of bacteriological contamination along with some physico-chemical parameters of water samples from Lahore canal. ANOVA showed that the observed p values of log-transformed viable plate counts, total suspended solids, turbidity, and biological oxygen demand are 0.000, 0.000, 0.000, and 0.000, respectively, which are <0.05, while the p value of total coliforms, total fecal coliforms, and Escherichia coli are 0.728, 0.827, and 0.081, respectively which are >0.05. Significant correlation was observed between log-transformed viable plate counts (CFU), biological oxygen demand, total suspended solids, and turbidity. Further regression analysis revealed that simple line regression model is fit for log-transformed viable plate counts and total suspended solids, log-transformed viable plate counts and turbidity, turbidity and total suspended solids, biological oxygen demand and total suspended solids, biological oxygen demand and log-transformed viable plate counts, and biological oxygen demand and turbidity. 相似文献
83.
84.
Occurrence, finger printing and ecological risk assessment of polycyclic aromatic hydrocarbons (PAHs) in the Chenab River, Pakistan 总被引:4,自引:0,他引:4
Farooq S Eqani SA Malik RN Katsoyiannis A Zhang G Zhang Y Li J Xiang L Jones KC Shinwari ZK 《Journal of environmental monitoring : JEM》2011,13(11):3207-3215
Seventeen polycyclic aromatic hydrocarbons (PAHs) were studied in surface waters (including particulate phase) from the Chenab River, Pakistan and ranged from 289-994 and 437-1290 ng l(-1) in summer and winter (2007-09), respectively. Concentrations for different ring-number PAHs followed the trend: 3-rings > 2-rings > 4-rings > 5-rings > 6-rings. The possible sources of PAHs are identified by calculating the indicative ratios; appropriating petrogenic sources of PAHs in urban and sub-urban regions with pyrogenic sources in agricultural region. Factor analysis based on principal component analysis identified the origins of PAHs from industrial activities, coal and trash burning in agricultural areas and municipal waste disposal from surrounding urban and sub-urban areas via open drains into the riverine ecosystem. Water quality guidelines and toxic equivalent factors highlighted the potential risk of low molecular weight PAHs to the aquatic life of the Chenab River. The flux estimated for PAHs contaminants from the Chenab River to the Indus River was >50 tons/year. 相似文献
85.
Malik Vivek Singh Ravindra Khaiwal Rattan Preety Dayal Devi Attri Savita Verma 《Environmental science and pollution research international》2021,28(23):29085-29095
Environmental Science and Pollution Research - This study investigates the effect of environmental risk factors among North Indian children aged between 6 and 16 years associated with body mass... 相似文献
86.
Malik Bilal Ahmad Shah Mohammad Yousuf Sawant Vishwas A. 《Environmental science and pollution research international》2021,28(35):48274-48283
Environmental Science and Pollution Research - Micropiles, on account of their versatility, can serve as both a new foundation and a long-term option for prevailing foundations without disturbing... 相似文献
87.
Ara Talat Nisa Waqar-Un Aziz Rukhsanda Rafiq Muhammad Tariq Gill Rafaqat Ali Hayat Malik Tahir Afridi Uzma 《Environmental geochemistry and health》2021,43(10):4345-4345
Environmental Geochemistry and Health - A correction to this paper has been published: https://doi.org/10.1007/s10653-021-00910-5 相似文献
88.
Mucus released by scleractinian corals can act as an important energy and nutrient carrier in coral reef ecosystems, and a
distinct isotopic signature would allow following the fate of this material. This study investigates the natural C and N stable
isotopic signatures of mucus released by four scleractinian coral genera (Acropora, Fungia, Pocillopora and Stylophora) in comparison with those of suspended particulate organic matter (POM) in seawater of a Northern Red Sea fringing coral
reef near Aqaba, Jordan. The natural δ13C and δ15N signatures of coral mucus differed significantly from seawater POM for the majority of seasonal comparisons, but were inappropriate
for explicit tracing of mucus in the coral reef food web. Thus, a labeling technique using stable isotope tracers (13C and 15N) was developed that produced δ13C values of up to 122 ± 5‰ (mean ± SE) and δ15N of up to 2,100 ± 151‰ in mucus exuded by Fungia corals. 13C and 15N-enriched compounds were rapidly (within 3 h) and light-dependently transferred from the endosymbiotic zooxanthellae to the
mucus-producing coral host. The traceability of 15N-labeled mucus was examined by evaluating its uptake and potential utilization by epizoic acoelomorph Waminoa worms naturally occurring on a range of scleractinian coral taxa. This tracer experiment resulted in uptake of coral mucus
by the coral-associated acoelomorphs and further demonstrated the possibility to trace stable isotope-labeled coral mucus
by revealing a new trophic pathway in coral reef ecosystems. 相似文献
89.
Jandu Anchal Malik Anju Dhull Sanju Bala 《Environmental geochemistry and health》2021,43(10):3997-4026
Environmental Geochemistry and Health - In arid and semiarid regions, groundwater is required for the drinking, agriculture, and industrial activities due to scarcity of surface water. Groundwater... 相似文献
90.
Mumtaz Shumaila Ali Shaukat Khan Rida Shakir Hafiz Abdullah Tahir Hafiz Muhammad Mumtaz Samiara Andleeb Saiqa 《Environmental science and pollution research international》2020,27(9):8953-8964
Environmental Science and Pollution Research - Due to industrial and urban sewage, the metal contaminations in aquatic and terrestrial environments are increasing day by day, especially in... 相似文献