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101.
Parameters e ect on heterogeneous photocatalysed degradation of phenol
in aqueous dispersion of TiO2
Photocatalytic degradation of phenol selected as model compound of organic pollutant had been investigated in aqueous titanium
dioxide (TiO2) dispersion under UV irradiation. The e ects of various parameters such as pH, catalyst concentration, phenol
concentration, anions, metal ions, electron acceptors, and surfactants on the photocatalytic degradation of phenol were investigated.
The degradation kinetics was determined by the change in phenol concentration employing UV-Vis spectrometry as a function of
irradiation time. The degradation kinetics of phenol follows pseudo first-order kinetics. The results showed a significant dependence of
the photocatalytic degradation of phenol on the functional parameters. The probable promising roles of the additives on the degradation
process were discussed 相似文献
102.
Aijuan Wang Yunshan Ge Jianwei Tan Mingliang Fu Asad Naeem Shah Yan Ding Hong Zhao Bin Liang 《环境科学学报(英文版)》2011,23(3):419-426
On-road emission and fuel consumption (FC) levels for Euro III and IV buses fueled on diesel and compressed natural gas (CNG)
were compared, and emission and FC characteristics of buses were analyzed based on approximately 28,700 groups of instantaneous
data obtained in Beijing using a portable emissions measurement system (PEMS). The experimental results revealed that NOx and
PM emissions from CNG buses were decreased by 72.0% and 82.3% respectively, compared with Euro IV diesel buses. Similarly,
these emissions were reduced by 75.2% and 96.3% respectively, compared with Euro III diesel buses. In addition, CO2, CO, HC,
NOx, PM emissions and FC of Euro IV diesel buses were reduced by 26.4%, 75.2%, 73.6%, 11.4%, 79.1%, and 26.0%, respectively,
relative to Euro III diesel buses. The CO2, CO, HC, NOx, PM emissions and FC factors all decreased with bus speed increased, while
increased as bus acceleration increased. At the same time, the emission/FC rates as well as the emission/FC factors exhibited a strong
positive correlation with the vehicle specific power (VSP). They all were the lowest when VSP < 0, and then rapidly increased as VSP
increased. Furthermore, both the emission/FC rates and emission/FC factors were the highest at accelerations, higher at cruise speeds,
and the lowest at decelerations for non-idling buses. These results can provide a base reference to further estimate bus emission and FC
inventories in Beijing. 相似文献
103.
Zhihua Liu Asad Naeem Shah Yunshan Ge Yan Ding Jianwei Tan Lei Jiang Linxiao Yu Wei Zhao Chu Wang Tao Zeng 《环境科学学报(英文版)》2011,23(5):798-807
The effects of continuously regenerating diesel particulate filter (CRDPF) systems on regulated gaseous emissions, and number-size
distribution and mass of particles emanated from a diesel engine have been investigated in this study. Two CRDPF units (CRDPF-1
and CRDPF-2) with di erent specifications were separately retrofitted to the engine running with European steady-state cycle (ESC).
An electrical low pressure impactor (ELPI) was used for particle number-size distribution measurement and mass estimation. The
conversion/reduction rate (RCR) of hydrocarbons (HC) and carbon monoxide (CO) across CRDPF-1 was 83% and 96.3%, respectively.
Similarly, the RCR of HC and CO and across CRDPF-2 was 91.8% and 99.1%, respectively. The number concentration of particles
and their concentration peaks; nuclei mode, accumulation mode and total particles; and particle mass were highly reduced with the
CRDPF units. The nuclei mode particles at downstream of CRDPF-1 and CRDPF-2 decreased by 99.9% to 100% and 97.8% to 99.8%
respectively; and the particle mass reduced by 73% to 92.2% and 35.3% to 72.4%, respectively, depending on the engine conditions.
In addition, nuclei mode particles increased with the increasing of engine speed due to the heterogeneous nucleation initiated by the
higher exhaust temperature, while accumulation mode particles were higher at higher loads due to the decrease in the air-to-fuel ratio
(A/F) at higher loads. 相似文献
104.
Husain Tahir Safdar Kousar Shazia Ahmed Farhan Rizwan Ullah Muhammad 《Environmental science and pollution research international》2021,28(35):47932-47941
Environmental Science and Pollution Research - Air pollution brings uncountable serious influences on human life during the last decade. This study is an attempt to compare economic liberalism with... 相似文献
105.
Jan Amin Ullah Hadi Fazal Shah Abdullah Ditta Allah Nawaz Muhammad Asif Tariq Muhammad 《Environmental science and pollution research international》2021,28(32):43417-43430
Environmental Science and Pollution Research - Soil pollution due to potentially toxic elements is a worldwide challenge for health and food security. Chelate-assisted phytoextraction along with... 相似文献
106.
Ullah Sana Ahmad Waheed Majeed Muhammad Tariq Sohail Sidra 《Environmental science and pollution research international》2021,28(47):66772-66786
Environmental Science and Pollution Research - This paper examines the relationship between deagriculturalization, economic growth, and CO2 emissions in Pakistan from the period 1975 to 2018 by... 相似文献
107.
Khan Ali Ahmad Adeel Shahid Azeem Muhammad Iqbal Naeem 《Environmental science and pollution research international》2021,28(37):51632-51641
Environmental Science and Pollution Research - Revival of natural colorants in textile dyeing is one of the important strategies to reduce synthetic chemical-based environmental pollution. The... 相似文献
108.
Aslam Bilal Hu Jinsong Majeed Muhammad Tariq Andlib Zubaria Ullah Sana 《Environmental science and pollution research international》2021,28(31):41923-41936
Environmental Science and Pollution Research - Since the nonlinear ARDL approach is introduced in advanced econometric, some old relationships are getting new empirical attention. Therefore, we... 相似文献
109.
Hafeez Muhammad Ullah Farman Khan Muhammad Musa Wang Zhangqian Gul Hina Li Xiaowei Huang Jun Siddiqui Junaid Ali Qasim Muhammad Wang Rui-Long Imran Muhammad Assiri Mohammed A. Rehman Muzammal Fahad Shah Lu Yaobin 《Environmental science and pollution research international》2022,29(40):60198-60211
Environmental Science and Pollution Research - Many species of devastating insect pests have acquired a high degree of resistance to insecticides in the field during the last few decades.... 相似文献
110.
Bibi Noorina Sayed Murtaza Shah Noor S. Rehman Faiza Naeem Abdul Mahmood Tahira Hussain Sajjad Iqbal Jibran Gul Ikhtiar Gul Saman Bushra Maleeha 《Environmental science and pollution research international》2022,29(42):63041-63056
Environmental Science and Pollution Research - Binary composite of zerovalent iron and titanium dioxide (Fe0/TiO2) was synthesized for the catalytic removal of dichlorophene (DCP) in the presence... 相似文献