naveed ahmed - Academia.edu (original) (raw)

Papers by naveed ahmed

Journal of The Air & Waste Management Association, 1991

The California Air Resources Board (ARB) completed a series of source tests of eight operating bi... more The California Air Resources Board (ARB) completed a series of source tests of eight operating biomedical waste incinerators (BMWI) under conditions of typical operation. The emissions of certain metals, and chlorinated dioxins and furans in the flue gases of BMWI are relatively high in comparison to emissions from other combustion sources, such as hazardous waste or municipal waste incinerators of modern design. This study reports on an analysis of the status of the existing regulatory framework and the California data base. Clarification of definitional issues at the federal level is needed to effectively treat BMWI management issues. Although few relationships among combustion parameters and emissions were uncovered, patterns of emissions were evident, suggesting commonality and relationships among the waste stream constituents and emissions. Potential implications for future research, operation of BMWI, controls and source reduction and waste segregation strategies are also discussed.

Environmental Science & Technology, 1996

ABSTRACT A composite approach involving wind sector analyses, receptor modeling, and dispersion m... more ABSTRACT A composite approach involving wind sector analyses, receptor modeling, and dispersion modeling has been developed to estimate the impact of a biomedical waste incinerator (BWI). This is presented using measurements of 12-h ambient air particulate matter and acid gases from a versatile air pollutant sampler, with meteorological data obtained near the BWI as part of a larger short-term respiratory effects study. Monitoring was performed in the same time frame for three consecutive years, the first year being prior to installation of air pollution control devices (APCDs) at the BWI, the next year with the BWI having APCDs, and the final year with the BWI being “mothballed”. Use of integrated wind sector analyses and receptor/dispersion modeling provided evidence of reduced emission impacts at the monitoring site during the 3-year period. Principal component analysis combined with linear−angular correlation and regression provided further evidence of reduced BWI impacts in addition to information about the nature of emission sources. The effectiveness of applying a wind direction-based receptor/dispersion model approach to assess emission abatement plans is demonstrated.

Waste Management & Research, 2006

Waste Management & Research, 1990

Incineration of biomedical wastes is the preferred option in many areas . Wastes from hospitals a... more Incineration of biomedical wastes is the preferred option in many areas . Wastes from hospitals are frequently incinerated on site, but current air pollution limits are difficult to comply with in small incinerators. The problems arising from incineration and the methods used to deal with them are summarized . A case is made for regional biomedical waste incinerators in the U .S .A .

The Canadian journal of infection control: …, 1996

As hospitals face severe financial constraints, the need to review programs to ensure cost-effect... more As hospitals face severe financial constraints, the need to review programs to ensure cost-effectiveness is critical. Waste management practices have come under scrutiny because inappropriate waste disposal is very costly. The Wellesley Hospital in Toronto, Ontario conducted a waste audit in July 1993 and found that 18.5% of waste was being disposed of as biomedical waste. Because the hospital pays nine times more to dispose of biomedical waste than it does landfill waste, a goal was set to reduce biomedical waste to 8% of total waste. A program, which included redefining biomedical waste, reviewing waste practices throughout the hospital, educating staff and monitoring outcomes, resulted in biomedical waste levels decreasing to 7.9% of total waste within 18 months. Savings realized were approximately $67,000. This program is easily reproducible.

Medical Journal Armed …, 2004

In accordance with the rules, every hospital generating BMW needs to set up requisite BMW treatme... more In accordance with the rules, every hospital generating BMW needs to set up requisite BMW treatment facilities on site or ensure requisite treatment of waste at common treatment facility. No untreated BMW shall be kept stored beyond a period of 48 hours. The cost of construction, operation and maintenance of system for managing BMW represents a significant part of overall budget of a hospital if the BMW rules have to be implemented in their true spirit. Two types of costs are required to be incurred by hospitals for BMW Mgt, internal and external. Internal cost is the cost for segregation, mutilation, disinfection, internal storage and transportation including hidden cost of protective equipment. External costs are off site transportation, treatment and final disposal.

Indian journal of dental …, 2000

All 64 dentists working in a teaching hospital of New Delhi participated in a survey. A pre-teste... more All 64 dentists working in a teaching hospital of New Delhi participated in a survey. A pre-tested self-administered questionnaire was used to assess knowledge and practices of biomedical waste management and infection control among these dentists. The results show that not all dentists were aware of the risks they were exposed to and only half of them observed infection control practices. In addition to this, majority of them were not aware of proper hospital waste management. The dentists need to be educated on Biomedical Waste (Management &amp;amp; Handling) Rules, 1998 through extensive training programme.

Waste Management, 2005

The objectives of this study were: (i) to assess the waste handling and treatment system of hospi... more The objectives of this study were: (i) to assess the waste handling and treatment system of hospital bio-medical solid waste and its mandatory compliance with Regulatory Notifications for Bio-medical Waste (Management and Handling) Rules, 1998, under the Environment (Protection Act 1986), Ministry of Environment and Forestry, Govt. of India, at the chosen KLE SocietyÕs J. N. Hospital and Medical Research Center, Belgaum, India and (ii) to quantitatively estimate the amount of non-infectious and infectious waste generated in different wards/sections. During the study, it was observed that: (i) the personnel working under the occupier (who has control over the institution to take all steps to ensure biomedical waste is handled without any adverse effects to human health and the environment) were trained to take adequate precautionary measures in handling these bio-hazardous waste materials, (ii) the process of segregation, collection, transport, storage and final disposal of infectious waste was done in compliance with the Standard Procedures, (iii) the final disposal was by incineration in accordance to EPA Rules 1998, (iv) the non-infectious waste was collected separately in different containers and treated as general waste, and (v) on an average about 520 kg of non-infectious and 101 kg of infectious waste is generated per day (about 2.31 kg per day per bed, gross weight comprising both infectious and noninfectious waste). This hospital also extends its facility to the neighboring clinics and hospitals by treating their produced waste for incineration.

Annals of Occupational Hygiene, 1993

DNA-damaging effects of asbestos in the presence of organic peroxides and hydroperoxides were inv... more DNA-damaging effects of asbestos in the presence of organic peroxides and hydroperoxides were investigated. The destabilization of the secondary structure of DNA, damage to deoxyribose sugar and DNA fidelity were measured, respectively, by S-1 nuclease hydrolysis, the formation of thiobarbituric acid (TBA)-reacting species and a melting temperature (Tm) profile using calf thymus DNA. S-1 nuclease hydrolysis and Tm determinations have shown that the presence of benzoylperoxide (BOOB), cumene hydroperoxide (COOH) or tertiary-butyl hydroperoxide (t-BOOH) increased asbestos-mediated DNA damage by a large factor compared either to asbestos alone or to peroxide or hydroperoxide alone. However, no formation of TBA-reacting species could be observed in this system. The quenchers of reactive oxygen species (ROS) afforded protection against DNA damage. These results suggest that asbestos in the presence of organic peroxides and hydroperoxides damage the DNA which is mediated by the generation of oxygen free radicals. The significance of these results in relation to the development of cancer of the respiratory tract among the asbestos exposed population is discussed.