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11.
Plant-driven removal of heavy metals from soil: uptake,translocation, tolerance mechanism,challenges, and future perspectives 总被引:2,自引:0,他引:2
12.
Chia-Nan Lin Chih-Yi Chang Hung Ji Huang Din Ping Tsai Nae-Lih Wu 《Environmental science and pollution research international》2012,19(9):3743-3750
Introduction
Solar wastewater treatment based on photocatalytic reactions is a green process that utilizes renewable energy resources and minimizes secondary pollution. Reactor design plays an important role in promoting treatment efficiency and throughput density (based on unit volume of the reactor).Experimental
A rotating disk reactor that significantly increases the process efficiency has been designed and evaluated for application to photocatalytic decomposition of dye pollutants in aqueous solutions. In this process, a novel multi-layer rotating disk reactor (MLRDR) was presented. Photocatalyst (TiO2) particles are immobilized on the surfaces of disks. Within each layer of the reactor, methyl orange aqueous solution is allowed to flow from the center of the disk in a radial direction along the surface of the disk, which is rotating at high speed and is irradiated with UV lamps. The effluent is then directed to the center of another layer that lies underneath. Up to four stacked layers have been tested in this study, and the effects due to the number of the layers and volumetric flow rate on reaction conversion are investigated.Results and discussion
The efficiency of this photocatalytic reactor exhibits complex dependence on these parameters. With selected operating conditions, conversions greater than 95% can be achieved within seconds of residence time. Design equations of the reactor have been derived based on fluid dynamics and kinetic models, and the simulation results show promising scale-up potential of the reactor. 相似文献13.
The paper presents the application of thermal remote sensing for mapping hydrocarbon polluted sites. This has been achieved by mono-window algorithm for land surface temperature (LST) measurements, using multi-date band 6 data of Landsat Thematic Mapper (TM). The emissivity, transmittance and mean atmospheric temperature were used as critical factors to estimate LST. The changes in the surface emissivity due to oil pollution alter the apparent temperature, which was used as a recognition element to map out oil polluted surfaces. The LST contrast was successfully used to map spatial distribution of hydrocarbon pollution in the Burgan Oil field area of Kuwait. The methodology can be positively used to detect waste dumping, oil spills in oceans and ports, besides environmental management of oil pollution at or near the land surface. 相似文献
14.
Shahid Mahmood Baig Ayesha Azhar Hammad Hassan Jamshaid Mahmood Baig Muhammad Aslam Mohammad Amin Ud Din Javed Anver Qureshi Tariq Zaman 《黑龙江环境通报》2006,26(10):903-905
Pakistan has a large population of more than 150 million people with an overall carrier frequency of approximately 5.6% for β-thalassemia. Punjab is the largest province of the country having more than 50% of the population. The state of β-thalassemia is alarming as consanguinity is very high (>81%) and the literacy rate is low in South Punjab. A thalassemia prevention program is the need of the hour in this part of Pakistan. In this study, we initiated awareness, screening, and characterization of the mutations causing β-thalassemia as well as a genetic counseling program mainly in the districts of Faisalabad and D.G. Khan to establish prenatal diagnosis, a facility previously unavailable in this region for disease prevention. A total of 248 unrelated transfusion-dependent children and the available members of their families were screened to characterize the mutations and identify the carriers. Genetic counseling was provided to these families and prenatal diagnosis offered. In the samples analyzed, 11 β-thalassemia mutations and three hemoglobin variants were detected mainly by using the Monoplex and Multiplex ARMS-PCR. First-trimester prenatal diagnosis was carried out through chorionic villus sampling (CVS) in seven pregnancies at risk. As a result of our campaign, 145 carrier couples planning to have more children gave their consent to have retrospective prenatal diagnosis in every pregnancy in future. A cooperative trend and a positive attitude toward the prevention of β-thalassemia were noticed in the families with affected children and in the general population. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
15.
Khan Muhammad Hafeez Ullah Khattak Jabar Zaman Khan Jamil Muhammad Malook Ijaz Khan Shahid Ullah Jan Mehmood Din Ismail Saud Shah Kamran Muhammad Alharby Hesham Fahad Shah 《Environmental science and pollution research international》2017,24(30):23850-23863
Environmental Science and Pollution Research - Salinity is a worldwide environmental problem of agricultural lands. Smoke and plant growth-promoting bacteria (PGPR) are individually used to improve... 相似文献
16.
嘉陵江流域洪水区域分析 总被引:1,自引:0,他引:1
嘉陵江流域位于长江上游 ,是长江流域面积最大的支流 ,也是长江洪水的主要来源之一。用一种新的洪水区域分析方法———标度分析法对年最大洪峰流量区域变化的性质进行了研究。标度分析法的基本思想是认为在具有相似的地理、地质和气候条件的区域内洪水的空间变化满足标度不变性 ,将不同的地区划分成不同的区域 ,在同一子区域内用标度变换来对洪水资料进行处理 ,这种思想具有现实的普遍意义。对嘉陵江流域洪水资料研究的结果表明标度不变性在一定程度上确实存在 ,且表现出多标度性 ,也就是说不同频率 p下的标度指数θ(p)有不同的值。因此用标度分析法进行洪水区域分析是可行的。为了实际应用 ,最后还计算了嘉陵江流域不同频率p的标度指数θ(p)值 ,由这些结果可以实现由有资料地区的洪水资料对无资料地区洪水进行粗估 相似文献
17.
Imran Muhammad Islam Azhar Ul Tariq Muhammad Adnan Siddique Muhammad Hussnain Shah Noor Samad Khan Zia Ul Haq Amjad Muhammad Din Salah Ud Shah Ghulam Mustafa Naeem Muhammad Asif Nadeem Muhammad Nawaz Muhammad Rizwan Muhammad 《Environmental science and pollution research international》2019,26(24):24489-24502
Environmental Science and Pollution Research - The present study aims at evaluating the batch scale potential of cotton shell powder (CSP), Moringa oleifera leaves (ML), and magnetite-assisted... 相似文献
18.
Isotopes of uranium in the sea-water sediments collected from two different areas (El Hamraween harbour and Ras El Behar) on the Egyptian coast of the red sea have been studied using radiochemical separation procedures and alpha-particle spectrometry. Activity concentrations of 238U, 235U, 234U were calculated. The activities observed indicated enhanced radioactivity levels in sea-water sediments of El Hamraween harbour area due to the activities of phosphate shipment operation. Secular equilibrium between 234U and 238U was found in the analyzed samples. The average activity ratio of 235U/238U was close to the value 0.046 for uranium in nature. 相似文献
19.
Jamil Barkat Yaping Shen Ud Din Nizam Nazneen Shama Mushtaq Anila 《Environmental science and pollution research international》2021,28(37):51278-51296
Environmental Science and Pollution Research - Environmental degradation is being studied by linking with various factors depending upon the interest of researchers. Our interest is in... 相似文献
20.
Tran Thuan Van Nguyen Duyen Thi Cam Kumar Ponnusamy Senthil Din Azam Taufik Mohd Jalil Aishah Abdul Vo Dai-Viet N. 《Environmental Chemistry Letters》2022,20(2):1309-1331
Environmental Chemistry Letters - Pollution and diseases such as the coronavirus pandemic (COVID-19) are major issues that may be solved partly by nanotechnology. Here we review the synthesis of... 相似文献