Hafizhul Khair

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• Doctor of Engineering
• Resercher/Lecturer at University of North Sumatra

Mesoplastics are plastic particles with dimensions ranging from 0.5 cm to 2.5 cm. The objective of this study is to examine the concentration of Pb and Cd in existing mesoplastics and the water of the Deli River in Medan City, as well as investigate the correlation between these two variables. The sampling was conducted using grab samples, and the...

Gas and Steam Power Plant PT. PLN (Persero) Belawan Generation Control Implementation Unit (UPDK) is the main supplier of electricity needs in the Northern Sumatra System. In the early days of Gas and Steam Power Plant PT. PLN UPDK Belawan, the fuel used was diesel oil. However, since 2015, this Gas and Steam Power has started to use natural gas as...

Owing to the inability of the material to biodegrade, the handling of plastic waste presents a considerable challenge. Pyrolysis is a plastic waste management method that solves the problem of plastic waste volume through chemical recycling. This study aims to assess the quantity and quality of the density, viscosity, and calorific value of oil pro...

Siombak Lake is an artificial lake in Medan City. We investigated microplastic pollution in tropical tidal lake waters in the current research. Grab samples of water and sediments were taken by Indonesian standards. Organic digestion and density separation were used in the preparation of the sample. The categorization of the polymer was determined...

Household solid waste processing through incinerators may pose environmental problems, as gas emissions from combustion are released. Air Pollution Control Devices (APCD), such as cyclones and cyclone scrubbers, are frequently utilized to mitigate these issues. This study aims to evaluate the efficacy of cyclones and cyclone scrubbers as APCD for i...

The existence of open dumping in Medan City’s final waste processing since 1993 has certainly had a negative impact in the form of a decrease in air quality which has a further impact on public health problems. This study aims to analyse and maps the distribution of PM 10 and PM2 .5 concentrations in the Terjun Landfill and to examine the relations...

Pangambatan Village, as part of the Lake Toba National Strategic Area and a tourist destination, still lacks facilities, infrastructure, and professional human resources to manage its cultural and tourism potential. An initial mapping of the conditions and potential of the area is needed to drive tourism in Pangambatan Village towards sustainable t...

Open waste burning (OWB) is a common disposal practice in several countries. However, this activity can serve as a source of particulate matter and black carbon, which possess a greater greenhouse effect potential than CO2. Moreover, particulates can produce chronic health impacts on residents around the burning areas. Therefore, the present study...

Illegal municipal waste dumping practices in developing countries may be impacted by many factors such as socioeconomic, demographic, availability of waste collection facilities, recycling sites, and spatial characteristics. This study uses spatial regression analysis to identify which factors primarily impact illegal waste dumping practices. For t...

Restaurants are one of the largest organic waste sources in a region, but waste from restaurants has not been treated well, resulting in it ends directly in a landfill. Black soldier fly (BSF) treatment is an emerging technology that can turn organic waste into high-protein feed. The utilization of BSF is carried out by converting organic waste int...

Lake Toba area is one of the priorities for developing tourist destinations in Indonesia. As a strategic national tourism area, it is necessary to identify aspects of the tourism area development that are not yet optimal to increase the number of tourist visits to that location. This study aims to assess the cleanliness of tourist sites in Lake Tob...

This study identifies and quantifies floating macro litter and macro plastic from Deli River Medan during pandemic Covid-19. Macro litter transport consists of floating items at surface, suspended in water column and transport over on riverbed. Litter was collected from 5 location along 11.6 km using static trawls with a height of 150 cm and width...

In preparation for a new habit adaptation era, Covid-19 infectious waste of self-isolation (SI) patient at home may become a concern in Indonesia. Therefore, the current study evaluates the implementation of the infectious waste management of SI patients (households) in Padang, Medan and Banda Aceh City, Sumatera, through online questionnaires and...

This study identifies and quantifies floating macro litter and macro plastic from Deli River Medan during pandemic Covid-19. Macro litter transport consists of floating items at surface, suspended in water column and transport over on riverbed. Litter was collected from 5 location along 11.6 km using static trawls with a height of 150 cm and width...

The increase in population is directly proportional to the use of goods/materials, resulting in the volume of waste produced. If it is not processed, an increase in the volume of waste will lead to the emergence of piles of waste and the need for landfill land to accommodate waste is higher. One solution to solve the waste problem is to convert was...

Lake Toba is a tourist area that continues to be developed, attracting local and foreign tourists. The increase in tourists visiting lake Toba affects the social and economic aspects and impacts the environment, one of which is the increase in waste generation. On the other hand, waste in the Tourist area is not well managed. This study determines...

Girsang Sipangan Bolon and Merek do not have basic data for solid waste management design. This research aimed to analyze the generation, composition of domestic and non-domestic waste. Sampling methods are determined based on SNI 19-3962-1994. The average amount of waste generation in units of volume for the area divider factor and the number of i...

WHO announced a new outbreak disease, COVID-19, as a public health emergency that has plagued the world since January 30, 2020. Critical readiness and response are needed, such as equipping healthcare workers and facility management with important information, procedures, and tools to be safe and working effectively in responding to the outbreak. O...

The increase in population and changes in community consumption patterns are one of the triggers for the increasing volume of waste. Therefore, changes are needed to manage waste so that the accumulation of waste can be handled properly. Government cooperation is considered important in solving problems. The volume of waste from its source has to b...

The development of a reduce-reuse-recycle (3R) based solid waste management system was studied in the Pariaman City Beach Tourism Area which consists of Gandoriah Beach, Cermin Beach, Kata Beach, Angso Duo Island and Tangah Island. Solid waste managed is 2,646.813 m3/day. Development based on Permen PU No. 3 of 2013, with a scale of area management...

p> Aims: This study aims to investigate the material flow of waste bank activities in Medan Methodology and results: A semi-structured interview survey approach was conducted to collect the data. Applying MFA methodology, the result of this study found that of the total amount of the input material, 87.4% is a recyclable waste, and 12.6% is water....

This study aims to estimate solid waste generation and its composition of households in Medan City. Medan Labuhan and Medan Tuntungan sub-districts were selected as study area. Data of this study was collected in 2017. The estimation of waste generation was conducted based on Indonesian standard SNI 19-3964-1994. The study found that the household...

Waste management is still a serious issue in developing countries including Indonesia. Various policies have been initiated to address the problem. Indonesia has a target called “Waste-free Indonesia 2020”. The implementation of recycling through waste bank programs is one of the policies attempted. Medan is one of the big cities in Indonesia that...

The development of industry and the increase of transportation mode are directly proportional to the decrease in air quality. Some important pollutants have a negative impact on human health and the environment such as nitrogen dioxide (NO2) and ozone (O3). Distribution of NO2 and O3 concentrations from various sources of emissions in urban areas w...

Indonesia initiated “Waste-free Indonesia 2020” campaign, one of the implementations to reach the goal is through solid waste bank programs. The Government encourages the growth of solid waste banks nationwide. Adopting a bank system, the solid waste bank is a community-based activity to facilitate people in solid waste recycling. With this system,...

This paper describes the flood prediction along the Babura River, the catchment of which is within the comparatively larger watershed of the Deli River which crosses the centre part of Medan City. The flood plain and ensuing inundation area were simulated using HECRAS based on the available data of rainfall, catchment, and river cross-sections. The...

Municipal solid waste (MSW) management is still an issue in many cities in Indonesia including Medan. Understanding the waste generation, its characteristic and communities involvement could provide effective solid waste management. This research compares waste generation from people who live in the city center and suburban area. The research also...

Development of industries and increase in transportation usage directly affect air quality. Some pollutants have negative impacts on human health and the environment, such as particulate matter 10 microns (PM10) and ozone (O3). Distribution of PM10 and O3 concentrations from various emission sources in urban areas provide basic information to facil...

Bencana adalah peristiwa atau rangkaian peristiwa yang mengancam dan mengganggu kehidupan dan penghidupan masyarakat. Jika terjadi bencana, maka akan memunculkan permasalahan yang dapat dikategorikan menjadi 2 (dua), yakni (1) di saat bencana biasanya timbul korban dalam keadaan meninggal atau cedera yang membutuhkan pertolongan medis darurat dan (...

This study aims to map and analyze air quality index of carbon monoxide (CO) in Medan City. This research used 12 (twelve) sampling points around in Medan with an hour duration each point. CO concentration was analyzed using the NDIR CO Analyzer sampling tool. The concentration CO was obtained between 1 ppm - 23 ppm, with an average concentration w...

The regulation of Minister of Home Affairs Number 33 of 2006 about general directive of disaster mitigation is stating that one of important things to do in disaster mitigation is providing information and hazard map for all kind of disasters. This study mapped the inundation in Medan City from Babura River by integrating hydraulic model which simu...

The transportation is one of the largest contributor to air pollution in Indonesia, especially in large cities. Fuel gases from combustion in motor vehicles, such as oxides of nitrogen (NOx) will be emitted to the ambient air. Increasing the concentration of NOx in ambient air can be bad for human health, especially with regard to upper respiratory...

Groundwater if allowed to form a yellow precipitate indicates that contains high levels of Fe and Mn are high, so we need a method that is good in quality and economical way to improve the quality of groundwater. Experimental research that aims to determine the effect of aeration is terraced with a combination of sand, activated carbon and zeolite...

This study aims to map the concentration of carbon monoxide (CO) in Medan city and to estimate the potential reduction in carbon monoxide in some streets of Medan by applying mass transit based on simulation. This research was conducted by sampling CO in the 12 (twelve) points in Medan by grab sampling. CO concentration was analyzed using NDIR meth...

The transportation sector is the biggest contributor to air pollution in Indonesia, especially in metropolitan cities. Gases such as oxides of nitrogen (NOx) are produced during the combustion of fossil fuels in the internal combustion of vehicle engines. Oxides of nitrogen such as nitric oxide (NO) and nitrogen dioxide (NO2) are important air poll...