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Mohammad Ashik Iqbal Khan Kihachi Ueno Sakae Horimoto Fuminori Komai Takashi Someya Koichi Inoue Kinji Tanaka Yoshitaka Ono 《Waste management (New York, N.Y.)》2009,29(12):2969-2975
The composting process of different organic wastes both in laboratory and on a large-scale was characterized using CIELAB color variables to evaluate compost stability for the better application in agriculture. The time courses of the CIELAB variables of composting materials were determined directly from the bottom of a glass petri dish filled with dried and ground samples using a Minolta Color Reader (CR-13) calibrated with clean empty petri dishes placed on a white tile. To compare the proposed method with conventional methods, the same materials were also evaluated using commonly used compost stability evaluation indices. Most of the CIELAB variables of a compost made from a mixture of green tea waste and rice bran reached a plateau after 84 days of composting and showed strong relationships with the commonly used compost stability evaluation indices. The time needed for CIELAB variables, especially the L*and b* values, to stabilize at large-scale composting plants of cattle litter, farmyard manure, kitchen garbage and bark compost, were more or less similar to the times of maturation evaluated by the respective compost producers. The CIELAB color variable offers a new, simple, rapid and inexpensive means of evaluating compost stability and its quality prior to agricultural use. 相似文献
23.
Iqbal Farheena Wilson Robyn Ayub Qasim Song Beng Kah Krzeminska-Ahmedzai Urszula Talei Amin Hermawan Andreas Aditya Rahman Sadequr 《Environmental science and pollution research international》2023,30(13):35715-35726
Environmental Science and Pollution Research - Urban-dwelling birds can be useful biomonitors to assess the impact of the urbanisation on both public and wildlife health. Widely distributed urban... 相似文献
24.
Jean Leroux Mazhar Mahmud 《Journal of the Air & Waste Management Association (1995)》2013,63(6):402-404
Methods previously published by this laboratory for analyzing thin dust coatings of airborne particulates have been further evaluated, as applied to vast air pollution surveys. It was demonstrated that choice of glass fiber filters adapted to high-volume samplers restricts the analysis to a limited number of elements, such as lead. More flexibility and versatility are attained through the use of organic membrane filters mounted in small plastic monitors which permit multi-elemental analysis at least as accurately as with other popular but time-consuming techniques. These qualities of speed and accuracy allow shorter intervals of sampling which are normally required for better statistical assessment of broad air pollution surveys. Sensitivity of the technique reaches a value close to 0.05 μg/m3, while time of analysis required is about five minutes per element after receipt of the sample. 相似文献
25.
Differences in nitrous oxide fluxes from red soil under different land uses in mid-subtropical China 总被引:1,自引:0,他引:1
Shan LinJaved Iqbal Ronggui Hu Leilei RuanJinshui Wu Jinsong ZhaoPengju Wang 《Agriculture, ecosystems & environment》2012,146(1):168-178
Red soil may play an important role in nitrous oxide (N2O) emissions due to its recent land use change pattern. To predict the land use change effect on N2O emissions, we examined the relationship between soil N2O flux and environmental determinants in four different types of land uses in subtropical red soil. During two years of study (January 2005-January 2007), biweekly N2O fluxes were measured from 09:00 to 11:00 a.m. using static closed chamber method. Objectives were to estimate the seasonal and annual N2O flux differences from land use change and, reveal the controlling factors of soil N2O emission by studying the relationship of dissolved organic carbon (DOC), microbial biomass carbon (MBC), water filled pore space (WFPS) and soil temperature with soil N2O flux. Nitrous oxide fluxes were significantly higher in hot-humid season than in the cool-dry season. Significant differences in soil N2O fluxes were observed among four land uses; 2.9, 1.9 and 1.7 times increased N2O emissions were observed after conventional land use conversion from woodland to paddy, orchard and upland, respectively. The mean annual budgets of N2O emission were 0.71-2.21 kg N2O-N ha−1 year−1 from four land use types. The differences were partly attributed to increased fertilizer use in agriculture land uses. In all land uses, N2O fluxes were positively related to soil temperature and DOC accounting for 22-48% and 30-46% of the seasonal N2O flux variability, respectively. Nitrous oxide fluxes did significantly correlate with WFPS in orchard and upland only. Nitrous oxide fluxes responded positively to MBC in all land use types except orchard which had the lowest WFPS. We conclude that (1) land use conversion from woodland to agriculture land uses leads to increased soil N2O fluxes, partly due increased fertilizer use, and (2) irrespective of land use, soil N2O fluxes are under environmental controls, the main variables being soil temperature and DOC, both of which control the supply of nitrification and denitrification substrates. 相似文献
26.
Malik Summaira Iqbal Asim Imran Asma Usman Muhammad Nadeem Muhammad Asif Saira Bokhari Awais 《Environmental science and pollution research international》2021,28(26):34017-34026
Environmental Science and Pollution Research - The utilization of economic capabilities to raise production in the economy enhances the industrial activities and use of transportation. These... 相似文献
27.
Zhang Yaming Abbas Majed Koura Yaya Hamadou Su Yanyuan Iqbal Wasim 《Environmental science and pollution research international》2021,28(6):6913-6928
Environmental Science and Pollution Research - As a major source of pollution and the cause of climate change, greenhouse gas emissions are attracting the attention of scholars, policymakers, and... 相似文献
28.
Chang Lei Mohsin Muhammad Iqbal Wasim 《Environmental science and pollution research international》2023,30(9):22145-22158
Environmental Science and Pollution Research - This study examines China’s budgetary policy during the COVID-19 pandemic as a result of China’s insufficient ability to deal with a new... 相似文献
29.
Shanwei Ma Hang Li Guan Zhang Tahir Iqbal Kai Li Qiang Lu 《Frontiers of Environmental Science & Engineering》2021,15(2):25
30.
A highly sensitive enzyme immunoassay was standardized for aflatoxin B1 determination in poultry feed and its components using Riedel-de-Haen, ELISA Systems. A microtitration plate method was optimized using anti-aflatoxin B1 antibodies and peroxidase – aflatoxin B1 conjugate, based on competitive enzyme immunoassay principle. Standards of concentrations of 5, 10, 20, 50, 100, 500?ng/L aflatoxin B1, prepared in phosphate-buffered saline, were used. Standard curves showed that as the concentration of antigen decreased, absorbance values increased. Fifty percent inhibition was observed at 37?ng/L. Regression analysis showed that log concentration was inversely related to %B/B0, with a highly significant negative correlation (?0.980). The lowest detection limit for aflatoxin B1 was 5?ng/L. Using this standardized ELISA, aflatoxin B1 was detected in most of the commercially available poultry feed samples and their components. The data suggest that this test is suitable for the accurate determination of aflatoxin B1 concentrations in poultry feed and its components. 相似文献