排序方式: 共有47条查询结果,搜索用时 15 毫秒
21.
22.
Makris KC Salazar J Quazi S Andra SS Sarkar D Bach SB Datta R 《Journal of environmental quality》2008,37(3):963-971
A growing body of literature reports 3-nitro-4-hydroxyphenylarsonic acid (roxarsone) degradation in poultry litter (PL) to the more toxic inorganic arsenic (As). Aluminum-based drinking-water treatment residuals (WTR) present a low-cost amendment technology to reduce As availability in PL, similar to the use of alum to reduce phosphorus availability. Batch experiments investigated the effectiveness of WTR in removing roxarsone and inorganic As species from PL aqueous suspensions. Incubation experiments with WTR-amended PL evaluated the effects of WTR application rates (2.5-15% by weight) and incubation time (up to 32 d) at two incubation temperatures (23 and 35 degrees C) on As availability in PL. Batch PL aqueous experiments showed the high affinity of As(V), As(III), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), and roxarsone for the WTR. The 10% WTR amendment rate decreased As availability in PL by half of that of the unamended (no WTR) PL-incubated samples. The reduction in dissolved As concentrations during incubation of WTR-amended PL samples was kinetically limited, being complete within 13 d. Parallel reductions in roxarsone, As(V), and DMA concentrations were observed with liquid chromatography-inductively coupled plasma mass spectrometry, whereas As(III) and MMA concentrations were always <5% of dissolved As. Incubation temperature did not significantly (p > 0.05) influence dissolved As concentrations in the WTR-amended PL. Potential formation of a copper-containing roxarsone metabolite was considered in PL aqueous suspensions with the aid of electrospray mass spectrometry. Further experiments in the field are necessary to ensure that sorbed As is stable in WTR-amended PL. 相似文献
23.
Wang Se Wang Shuwen Shah Shaheen Li Longyan Fang Hao Hao Ce 《Environmental science and pollution research international》2020,27(9):9297-9306
Environmental Science and Pollution Research - As the derivatives and structural analogs of polybrominated diphenyl ethers (PBDEs), hydroxylated polybrominated diphenyl ethers (OH-PBDEs)... 相似文献
24.
Shaheen Mohamed N. F. Elmahdy Elmahdy M. Chawla-Sarkar Mamta 《Environmental science and pollution research international》2019,26(21):21619-21628
Environmental Science and Pollution Research - Fresh produce irrigated with surface water that may contain pathogens such as enteric viruses can lead to outbreaks of foodborne viral illnesses. In... 相似文献
25.
Butt Muhammad Qasim Zeeshan Nadia Ashraf Naeem Mahmood Akhtar Muhammad Aftab Ashraf Hina Afroz Amber Shaheen Aqsa Naz Shumaila 《Environmental science and pollution research international》2021,28(39):54842-54851
Environmental Science and Pollution Research - Massive discharge of wastes produced by the processing of leather so far confers the most important environmental challenge facing the tanneries... 相似文献
26.
Elmahdy Elmahdy M. Shaheen Mohamed N. F. Rizk Neveen M. Saad-Hussein Amal 《Food and environmental virology》2020,12(3):218-225
Food and Environmental Virology - Environmental monitoring is critical in a developing country like Egypt where there is an insufficient framework for recording and tracking outbreaks. In this... 相似文献
27.
Siddiqui Shahida Anusha Wu Yuan Seng Saikia Trideep Ucak İlknur Afreen Maliha Shah Mohd Asif Ayivi Raphael D. 《Environmental Chemistry Letters》2023,21(5):2789-2823
Environmental Chemistry Letters - Issues of climate change, energy demand, and natural resources depletion are calling for circular methods to produce value-added products such as biomass, biofuel,... 相似文献
28.
Vasileios Antoniadis Evangelia E. Golia Sabry M. Shaheen Jörg Rinklebe 《Environmental geochemistry and health》2017,39(2):319-330
Elevated concentrations of potentially toxic elements (PTEs) are usually found in areas of intense industrial activity. Thriasio Plain is a plain near Athens, Greece, where most of the heavy industry of the country has been situated for decades, but it also is a residential and horticultural area. We aimed at measuring the levels of PTEs in soils and indigenous plant species and assessing the health risk associated with direct soil ingestion. Samples of soils at roadsides and growing plants were collected from 31 sites of that area. Concentrations of Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, V and Zn were measured in both soils (as pseudo-total) and aerial plant tissues. We found that As, Cd, Cr, Cu, Ni, Pb and Zn were higher than maximum regulatory limits. Element concentrations in plants were rather lower than expected, probably because indigenous plants have developed excluder behaviour over time. Copper and Zn soil-to-plant coefficients were highest among the other elements; for Cu this was unexpected, and probably associated with recent Cu-releasing industrial activity. Risk assessment analysis indicated that As was the element contributing more than 50 % of the health risk related to direct soil ingestion, followed by Cr, Pb, and, surprisingly, Mn. We concluded that in a multi-element contamination situation, elevated risk of PTEs (such as As, Cr and Pb) may reduce the tolerance limits of exposure to less-toxic elements (here, Mn). 相似文献
29.
This study in selected Pakistani populations was conducted to determine the blood lead levels (BLL) in mothers and their developing fetuses. Associated factors were correlated with the maternal BLL. Blood samples from 113 pregnant women and their umbilical cords were examined for BLL and cord blood lead levels through a graphite furnace-attached atomic absorption spectrophotometer. A structured questionnaire was also used to obtain sociodemographic and obstetric data based on basic demographic data, reproductive history, hemoglobin levels, gestational age, parity, mode of delivery, maternal and baby weight, drinking water, menarche age, blood pressure, lead (Pb)-containing eye liner use, smoking, and nutritional status. In order to assess the strength of the relationship between different parameters, Pearson's coefficient correlation was utilized and their significance was determined by applying the t-test. Data demonstrated that the maternal BLL were always higher than the recommended concentrations of 10 µg/dl and many factors contributed towards such results. Drinking water seemed to affect the Pb concentration as women using spring water had relatively higher BLL. The calcium concentration in pregnant women and their fetuses ranged from 9 to 13 mg/dl. Majority of the pregnant women were undergraduates with 12 years of education (equivalent to high school in the United States). Evidence indicates that the avoidance of Pb intake and its associated factors in the study area will diminish risk to newborns. 相似文献
30.
Sabry M. Shaheen Vasileios Antoniadis Eilhann E. Kwon Jayanta K. Biswas Hailong Wang Yong Sik Ok Jörg Rinklebe 《Environmental geochemistry and health》2017,39(6):1365-1379
The objective of this research was to investigate the effects of biosolids on the competitive sorption and lability of the sorbed Cd, Cu, Ni, Pb, and Zn in fluvial and calcareous soils. Competitive sorption isotherms were developed, and the lability of these metals was estimated by DTPA extraction following their sorption. Sorption of all metals was higher in the fluvial than in the calcareous soil. Sorption of Cu and Pb was stronger than that of Cd, Ni, and Zn in all soils. Biosolids application (2.5%) reduced the sorption of all metals especially Cu and Pb (28–43%) in both soils (especially the calcareous soil) at the lower added metal concentrations (50 and 100 mg L?1). However, it increased the sorption of all metals especially Pb and Cu in both soils (especially the calcareous soil; 15.5-fold for Cu) at the higher added concentrations (250 and 300 mg L?1). Nickel showed the highest lability followed by Cd, Zn, and Pb in both soils. Biosolids increased the lability of the sorbed Ni in the fluvial soils at all added concentrations and the lability of Cd, Pb, and Zn at 50 mg L?1, but decreased the lability of Cd, Pb, and Zn at 250 and 300 mg L?1 in both soils. We conclude that at low loading rate (e.g., 50 mg L?1) biosolids treatment might increase the lability and environmental risk of Cd, Cu, Pb, and Zn. However, at high loading rate (e.g., 300 mg L?1) biosolids may be used as an immobilizing agent for Cd, Cu, Pb, Zn and mobilizing agent for Ni. 相似文献