Factory Area Research Articles

Pollution Characteristics, Risk Assessment, and Source Analysis of Heavy Metals in Soil from a Typical Abandoned Antimony Smelting Factory

Considering the surface soil （0-20 cm） from a typical abandoned antimony smelting factory area in Dachang Town, Qinglong County, Guizhou Province, as a case study, a total of 14 soil samples were systematically collected from both within and outside the smelting factory area. The analysis focused on the pollution status, distribution characteristics, and potential ecological risks of heavy metals such as Sb, As, Cd, Cr, Pb, Cu, Zn, Ni, and V in the soil. Additionally, an evaluation and analysis of pollution sources were conducted. The results showed that the mean concentrations of heavy metals including ω（Sb）, ω（As）, ω（Cd）, ω（Cr）, ω（Pb）, ω（Cu）, ω（Zn）, ω（Ni）, and ω（V） in the surface soil of the abandoned antimony smelting factory ranged from 4.58 to 15 049.33 mg·kg-1. With the exception of Cr and Ni, all values exceeded the background values of soils in Guizhou province. The single factor pollution indices of Sb and As were 83.61 and 7.01, respectively, indicating severe contamination. In contrast, Pb fell within the non-polluted to slightly polluted range. The comprehensive potential ecological risk of soil heavy metals was characterized by severe potential ecological risk levels for Sb, As, and Cd, while the remaining heavy metals fell within a range of moderate to substantial potential ecological risk levels. The assessment of the geoaccumulation index revealed that the soil in the study area was primarily contaminated by Sb and As, predominantly exhibiting contamination levels ranging from moderate to severe. The results from the RAC method suggested that Sb was the dominant focus for remediation in this abandoned smelting factory. The two primary pollutants, Sb and As, exhibited elevated levels in leachate toxicity, acid-soluble fraction, available fraction, gastric phase, and intestinal phase in terms of bioavailable content, indicating a certain potential hazard. Further, correlation analysis indicated a certain correlation between the total amount of heavy metals and leachate toxicity, available fraction, acid-soluble fraction, reducible fraction, oxidizable fraction, gastric phase extractable fraction, and intestinal phase extractable fraction. The APCS-MLR model indicated that the sources of Sb, As, Zn, Cu, and Cd were primarily industrial, while the sources of Cr and V were mainly natural, and Pb originated mainly from mixed sources.

Persepsi Cantik di Kalangan Karyawan Milenial (Analisis AISAS atas Pengaruh Terpaan Iklan Kecantikan di Kalangan Karyawati Pabrik Cikarang Selatan Kabupaten Bekasi Jawa Barat)

The concept of beauty always changes from time to time. One of the main factor determine is the rapid development of the advertising media industry, which led to the perception of beauty in society. This study aims to describe advertisment element exposure of Wardah “Feel the beauty” version and perceptions of beauty among millennial employees and explain the effect of Wardah advertisement elements exposure that formed the perceptions of beauty among factory employees in South Cikarang, Bekasi, West Java.This research uses AISAS theoretical framework that shows Attata, Attention, Interest, and the desire to search (Search), to decide (Action) and finally encourage customers to share (Share). The concept develop by tow theories with indicators of Frekuensi, duration, visual and audio and perception theory involving sensation, attention, expectations, motivation and memory.This study use positvism paradigm with quantitative approach and causal explanatory research design. The data collected by survey conducted for millennial employees who working in the factory area in South Cikarang District Bekasi West Java. About 381 respondent involved as sample of this research that defined using cluster sampling in the industrial area, i.e.: BIIE Hyundai, Delta Silicon, EJIP, and Jababeka II.

Simplified Assessment of Deterioration in Old Industrial Buildings: A Case Study of Jiaxing Metallurgical Machinery Factory

Under the background of the national policy of revitalizing old industrial areas by shutting down two-thirds of outdated factories, a significant number of aged industrial facilities are poised for adaptive reuse. Determining whether these old industrial buildings and their ancillary structures need to be "retained, renovated, or demolished" before reuse is a critical step in heritage conservation. The assessment of structural integrity is a prerequisite for evaluating whether to retain or demolish old buildings, which typically involves considerable time, effort, and high costs. In order to save costs and enhance the efficiency of inspections for each building, a simplified assessment method is employed to evaluate the integrity of buildings. Fuzzy evaluation method is utilized to assess the structural integrity of entire buildings, while the Analytic Hierarchy Process (AHP) is applied to determine the weights of the main load-bearing structures (slabs, beams, columns) and enclosing structures (exterior walls). Taking the Jiaxing Metallurgical Machinery Factory as a case study, the degree of deterioration of 61 buildings within the factory area is evaluated and ranked to provide technical support for subsequent demolition or preservation.

Distribution, risk evaluation, and source allocation of cesium and strontium in surface soil in a mining city.

Radioactive nuclides cesium (Cs) and strontium (Sr) possess long half-lives, with 135Cs at approximately 2.3 million years and 87Sr at about 49 billion years. Their persistent accumulation can result in long-lasting radioactive contamination of soil ecosystems. This study employed geo-accumulation index (Igeo), pollution load index (PLI), potential ecological risk index (PEPI), health risk assessment model (HRA), and Monte Carlo simulation to evaluate the pollution and health risks of Cs and Sr in the surface soil of different functional areas in a typical mining city in China. Positive matrix factorization (PMF) model was used to elucidate the potential sources of Cs and Sr and the respective contribution rates of natural and anthropogenic sources. The findings indicate that soils in the mining area exhibited significantly higher levels of Cs and Sr pollution compared to smelting factory area, agricultural area, and urban residential area. Strontium did not pose a potential ecological risk in any studied functional area. The non-carcinogenic health risk of Sr to the human body in the study area was relatively low. Because of the lack of parameters for Cs, the potential ecological and human health risks of Cs was not calculated. The primary source of Cs in the soil was identified as the parent material from which the soil developed, while Sr mainly originated from associated contamination caused by mining activities. This research provides data for the control of Cs and Sr pollution in the surface soil of mining city.

Nowcasting economic activity with mobility data

We develop high-frequency indices to measure sales in service industries and production in the manufacturing sector using GPS mobility data from mobile applications. First, by utilizing the point of interest data, we develop indicators to capture sales in amusement parks, shopping centers, and food services. Second, we construct indicators for nowcasting production based on the foot traffic in factory areas that are identified by using the Economic Census and mobility patterns. We find that the mobility data allow us to nowcast sales in the service sectors and have the potential to be used to nowcast the production in labor-intensive industries.

Analisis Biaya Transportasi dalam Pendistribusian Singkong Menggunakan Metode Northwest Corner dan Least Cost

Transportation plays an important role in supply chain management, where transportation is the process of determining how and when goods should be delivered to consumers. In the transportation method used, it is necessary to consider efficiency and speed in delivering goods. The object of this research is cassava plantations, which are in the Bogor district, especially in the Jonggol, Cariu and Sukamakmur sub-districts. The harvest from this plantation is allocated to 3 factory areas in the Bekasi district. The problem faced is the high transportation costs in allocating the harvest. So, the minimum distribution costs that will be incurred in allocating the harvest to various chip factories are not yet known, and the route and quantity of cassava that will be sent is not yet known. One method of transportation is the Northwest Corner (NWC) and Least Cost Method. The Northwest Corner and Least Cost methods are used in determining goods delivery routes, so that you can calculate the lowest transportation costs from one place to another. Based on the research results, the minimum distribution cost allocated for cassava is IDR 5,410,000.00 with distribution channels namely Cariu to Muktijaya as much as 90 tons, Sukamakmur to Cijengkol as much as 100 tons, Cariu to Ciledug as much as 10 tons, Jonggol to Ciledug as much as 140 tons, and Sukamakmur to Ciledug as much as 20 tons.

Respiratory Effects and Pulmonary Functions Related to Wood Dust Exposure among Workers in a Rubber Wood Factory

This study aimed to determine the effects of wood dust exposure on respiratory symptoms and pulmonary functions in wood dust factory workers and the association between wood dust exposure and pulmonary functions. This cross-sectional study comprised of one hundred workers who answered a self-reported questionnaire. Two factory areas, the production department and the back office, were explored using stationary air sampling. The wood dust concentration was collected using NIOSH Method 0600. Pulmonary function parameters were evaluated through spirometry. A descriptive statistics analysis was done for personal information. Binary logistic regression determined the association between wood dust exposure and respiratory symptoms. The prevalence of respiratory symptoms related to wood dust exposure at work was 49.00 percent. Three major symptoms in the exposed group includes chest pain, shortness of breath, and asthma. The average amount of PM10 in the saw mill area was significantly higher than in the back office (7.23 vs. 1.60 mg/m3). There was a significant difference in forced expiratory capacity between the reference and exposure groups (mean difference = -4.03, p-value = 0.011). The adjusted odd ratio showed that the high wood dust-exposed group had a lower runny nose and dry cough than the reference group. All workers need to consider using personal protective equipment with appropriate specifications in the sawmill area and also the other areas where wood dust levels are high. To control the concentration of respirable particles, resource and pathway control must be applied to reduce the concentration of respirable particles in the workplace.

Estimation of Some Major and Trace Elements in Human Hair in the Vicinity of Ashaka Cement Factory, Gombe State, Nigeria

This study aimed to estimate some major and trace elements in human hair samples obtained from humans living in the vicinity of Ashaka Cement Factory, Gombe State to identify the proportion of some major and trace elements in human hair samples. The samples collected from humans were kept in air-tight polyethene bags immediately. Then, they were washed with detergent to remove external dust and socked in distilled water for 10 minutes and transferred it into Acetone to remove stubborn dirt. The samples were analyzed using atomic absorption spectrometry (AAS) after several processes of determination and the graphical solution was plotted using MATLAB software package 2018a. The result of the analysis shows that 0.0091 ± 0.184, 0.169 ± 0.15, 0.16 ± 0.0102, 0.0014 ± 0.0025 mg/kg for Ca, Fe, Mg, Na and 0.085 ± 0.38, 0.0049 ± 0.0046, 0.0091 ± 0.0029, 0.099 ± 0.0069 mg/kg for Pb, Cu, Zn, Cd in human hair samples obtained in the vicinity of Ashaka cement factory. The findings of the study is greatly importance to the entire society, especially those in the area of Ashaka cement factory and it also informs people about the positive and negative effects of trace elements on human life. Based on this result, it is recommended amongst other things that, there should be a need for a study on the assessment of the elements content of cement dust using a variety of analytical approaches since; some of the elements such as Al, Si, Ni, and Hg were not detected in the sample obtained in the study using atomic absorption spectrometry.

REUSE OF SPUN PILE PRODUCTION WASTE FOR PAVING BLOCK DEVELOPMENT BY TAGUCHI METHOD

The production of precast spun piles generates solid and liquid waste products. The solid waste consists of stone, sand, and mud materials, while the liquid waste consists of K-600 grade concrete cement mixed with water. It is poured into a 1m3 container and solidifies within 3 hours. The production process of precast concrete piles is fast, which results in quick waste accumulation in the factory area. This research aims to transform the waste into paving blocks suitable for road construction. The Taguchi method is employed to determine the optimal strength of the paving blocks using three variables: (1) the ratio of solid to liquid waste in three levels - 70:30%, 60:40%, and 50:50%, (2) mixing time in three levels - 5, 10, and 15 minutes, and (3) curing time in three levels - 3, 7, and 14 days. The strength of the paving blocks is tested by measuring the maximum compressive strength. The results indicated that the best combination for achieving maximum compressive strength was using (1) a 50%:50% ratio of solid to liquid waste, (2) a curing time of 14 days, and (3) a mixing time of 5 minutes, resulting in a maximum compressive strength of 125.72 Kg/cm2. It is equivalent to Grade D paving blocks that are suitable for road application.

Utilization of Unmanned Aerial Vehicle (UAV) Technology to Identify Land Cover in Kedai Damar Village, Serdang Bedagai, North Sumatera

Remote sensing has been widely used in various fields, one of which is to provide information related to land cover classification Kedai Damar Village is one of 13 villages in the Tebing Tinggi sub-district, Serdang Bedagai Regency. The settlement of Kedai Damar is the one that is most remote from the headquarters of the high cliffs sub-district. This settlement is situated in the center of the PT.Perkebunan Nusantara-IV plantation region in Pabatu North Sumatera. As a result, several rural towns have opened shops providing food and other essentials to farmers and farmworkers in order to rely on PT. Perkebunan Nusantara-IV plantation. This research was conducted in the Kedai Damar Village administrative center area using unmanned aircraft technology and then visually interpretation of aerial photos and mapping administrative area land cover in the Kedai Damar Village administrative center area using processed data in the form of orthophoto from agisoft metashape software. Based on the results of the study, the Kedai Damar Village area has 5 types of land cover classifications that can be identified visually based on 9 elements of interpretation (hue, color, shape, size, texture, pattern, shadow, site and association) as well as ground checks or data collection and observations. In the field. there are 5 types of land cover that can be visually identified, including non-oil Palm, open land, factory Area, settlement, oil palm plantations.

Characterizing Microplastic Pollution and Microbial Community Status in Rice Paddy Soils Across Varied Environmental Settings in Songjiang, Shanghai: An Analysis of Morpho-Chemical Characteristics

Microplastic (MP) pollution poses a huge threat to rice fields, but the distribution characteristics of MPs in farmlands of different types of areas are still uncertain. In this work, 24 samples from 12 rice fields of four different land-use types (Factory, highway, greenhouse/mulching and normal fields) were collected from Songjiang, Shanghai. From our selected sites, it was found that MP abundances were in the range of 233.33- 173.33 particles/kg in rhizosphere and bulk soil. MP distribution results showed that over 40% of particles were less than 1 mm and MP sizes ranging between 1 and 5 mm represented the greatest proportion. According to our study, MP in rhizosphere soil has the highest abundance (233.33 ± 57.73 particles/kg) than bulk soil. The particle shape classified as fragment (with edges and angular) was the most frequent shape found near factory areas, with an abundance of approximately 37.10%. Copolymers of polypropylene- polyethylene (PP/PE) at 24.30% were the most abundant polymers in rice lands in both bulk and rhizosphere soils; following is polystyrene (PS) at 21.40%, respectively. Most of the particles found in soils were white. Statistical analyses showed that fields near factories and fields where plastic mulching (mulch film and greenhouse crops) was used had a significantly higher particle abundance for bulk and rhizosphere soils, hence identifying plastic mulching as a major contributor to MP pollution in paddy soils. In industrial areas, MP can also be generated by released waste or by air. Microbial studies in rice roots, rhizosphere soil, and bulk soil show variation in the abundance of different species and genera. The dominant bacterial phyla in rice roots are Proteobacteria, Actinobacteriota, Firmicutes, and Bacteroidota. These microbes have been observed and can be impacted by the presence of MPs. Rhizosphere soil and bulk soil have an abundance of Chloroflexi, Actinobacteriota, Proteobacteria, Firmicutes, and Acidobacteriota. The specific effects on the microbial community structure depend on factors like MP type, concentration, and exposure duration. As our study was field-based, the significant effect of a specific type or concentration of MP was difficult to identify. Variation analyses of MP characteristics revealed that paddy lands were more likely to contain fragment shapes and large MP particles (1-5 mm). Also, rhizosphere soils were likely to contain fragment shapes and pony-size MPs (0.02-0.2 mm). Differences among rice fields may depend on various reasons, such as using slow- release fertilizers, mulching plastic application, irrigation, atmospheric fallout, etc. This study provides some proper evidence about the characteristics of MP pollution in rice fields of Songjiang and explores some probable conditions and predominant MP sources in rice fields.

Emphasizing worker identification with skills to increase helping and productivity in production: A field experiment

AbstractCan productivity improve if workers identify more with the skills they use in their work environment? This paper reports the results of an experimental design that was peer‐reviewed prior to collecting data. The research setting is a global manufacturer using a novel smartwatch‐based system for distributing work tasks among factory floor workers. Drawing on the concepts of identification and helping in organizations, we hypothesized that fostering workers' identification with their own skills could serve as a mechanism to enhance helping behavior on the factory floor, which should improve productivity. We designed a compound skill‐fostering treatment consisting of communication, meetings, and exercises regarding individual skills. We treat one large factory area for 2 weeks and keep a similar area in a sister factory as a control group for comparison in a difference‐in‐difference model. The results show that nudging skill identification increases workers' identification with skills, but we do not find evidence for increased helping behavior or increased productivity. Our results help develop theory around multiple sub‐identities and provide guidance for future studies seeking to enhance identification in organizations.

The Effect of Material Flow Cost Accounting on Company Sustainability: Moderating Role of Green Accounting in Consumer Goods Industry Companies

This study analyzes the influence of material flow cost accounting in improving company sustainability. Material flow cost accounting. This research uses proxies for production costs, factory area, and output or production value. The population used in this research is all goods and consumption companies listed on the IDX for the 2015-2021 period. Through Purposive sampling, the samples obtained were 6 companies in that period, so 42 data were obtained. Data processing in this research was carried out using multiple regressions and moderated regression methods with an absolute difference value approach. This research concludes that MFCA (production costs) negatively and significantly affects company sustainability. This means that reducing production costs to get higher profits will increase the company's sustainability. Meanwhile, MFCA (factory area and output or production value) positively and significantly influences company sustainability. This shows that the wider the company's area and every time there is an increase in production results, the company's sustainability can increase. Besides, green accounting cannot moderate material flow cost accounting on company sustainability.

Study of factory settlements of the Perm region near the Kama river

The formation in the Urals of domestic factory production, which began with the salt industry, as a fundamental fishery in the territory, was considered, and was fully realized in mining industrial metallurgy, which received a whole direction called «Mining civilization». This period gave rise to the spread of new types of settlements City-plants, which were formed around the enterprise, and the territory developed as originally industrial. However, the problem of preservation of some factory settlements and as such enterprises arose for the authorities of the former Molotov region (1940-1957) «Gordian knot», due to the construction of the Kama hydroelectric power plant and the creation of a reservoir, As a result, not only agricultural land and pastures, but also historical settlements, factory areas and many unexplored archaeological sites were flooded. Therefore, in this article the historical, cartographic analysis of former factory settlements was also conducted and the damage of flooding and flooding of territories was revealed, as well as the preserved heritage of «factory civilization».

Study of factory settlements of the Perm region near the Kama river

The formation in the Urals of domestic factory production, which began with the salt industry, as a fundamental fishery in the territory, was considered, and was fully realized in mining industrial metallurgy, which received a whole direction called «Mining civilization». This period gave rise to the spread of new types of settlements City-plants, which were formed around the enterprise, and the territory developed as originally industrial. However, the problem of preservation of some factory settlements and as such enterprises arose for the authorities of the former Molotov region (1940-1957) «Gordian knot», due to the construction of the Kama hydroelectric power plant and the creation of a reservoir, As a result, not only agricultural land and pastures, but also historical settlements, factory areas and many unexplored archaeological sites were flooded. Therefore, in this article the historical, cartographic analysis of former factory settlements was also conducted and the damage of flooding and flooding of territories was revealed, as well as the preserved heritage of «factory civilization».

Thermodynamic evaluation of a novel renewable energy system that simultaneously provides electricity, freshwater, and syngas using a multiobjective optimization approach

AbstractThis research entails the simulation and thermodynamic evaluation of a combined solar‐powered system that is intended to achieve the energy necessary to construct factories in areas where other sources of energy are not available. The system comprises five major circuits: (1) a parabolic trough that collects solar energy and passes it to downstream circuits via an evaporator, (2) an organic Rankine cycle that generates electricity for devices and factories, (3) a proton exchange membrane electrolysis unit that produces hydrogen from pure water, (4) a methanation unit that produces gas by combining hydrogen and carbon dioxide, and (5) a reverse osmosis (RO) unit that purges seawater to produce freshwater. This investigation studies the efficiency of energy and exergy, the destruction rate of exergy, and the economic value of system components as a whole. The system is represented by the technical equation solver, and the results are obtained as a result. This research employs the genetic algorithm and Technique for Order of Preference by Similarity to Ideal Solution method to locate the most effective point. The achieved outcomes include a maximum total system efficiency of 54.935% and a minimum total cost of 2.578 $/GJ. Dated to the optimal point, the power generated is 305.5 kW, the required power of a single‐cell electrolyzer is 293.8 W, the mass flow rate of methane and hydrogen production is 448.92 and 225.64 kg/h, respectively. The water volume generated by RO is 35.25 m3/h, and the total cost of the investment is 85.57 $/h.

Research on emergency evacuation behavior rules of pedestrians under fire and explosion accidents in chemical parks considering social relationships

Chemical parks present a high risk of sudden accidents such as fires and explosions, given the significant number of hazardous sources present. This is why emergency evacuation after accidents is so essential. The behavior of crowds during evacuation is complex, and social relationships among pedestrians can have differentiated effects on the evacuation process. However, most of the current crowd evacuation research has focused on life scenarios and natural disaster contexts. Less attention has been paid to the emergency evacuation of crowds affected by social relations in the context of chemical accident disasters. A comprehensive evacuation model that considers the dynamic evolution of crowd transfer both within and outside the factory area is proposed in this paper. Using the Anylogic software based on the social force model, this study constructs emergency evacuation scenarios for crowd in the context of fire and explosion accidents, and toxic gas leakage incidents. Specifically, this study analyzes the impact of three factors, namely inter-personal distance, group size, and proportion of different group sizes in the total population, on the evacuation efficiency. It has been found that when large groups of pedestrians are split into smaller ones for evacuation, the evacuation efficiency can be effectively improved. The study includes calculations of the lethal range of a toxic gas and simulated the process of relocating large crowds of people to nearby shelters. In addition, a strategy for deploying pedestrian groups based on social relationships was developed for the context of mass evacuation. These measures have the potential to optimize the evacuation efficiency of pedestrian groups in chemical parks, including expanding and modifying shelters, diverting dense crowds from residential plots, using interpersonal spacing of 0.1 m, and splitting large groups of pedestrians into smaller ones. The research results can provide a reference for decision making for large-scale group evacuation in chemical parks, and improve the emergency evacuation capability and local risk response capability in chemical parks.

Pouring Vitality and Reconstructing Memory：Baosteel Industrial Heritage Landscape Renovation Design Study

[Objective]Taking the brownfield of Baosteel industrial site as an example, this study proposes a landscape renovation program based on the theoretical foundation of ecological restoration in response to the problems of soil destruction, water pollution, landscape fragmentation, and loss of field area memory. [Objective]Combine history and culture with ecological restoration in order to preserve special historical relics, so as to promote the reconstruction of the land ecosystem in the factory area and improve the utilization rate of the land in the field area. [Methods] 1. Soil was sampled by five-point sampling method to assess the degree and distribution of soil pollution. 2. Elemental content testing was carried out for Baosteel FGD wastewater. 3. Industrial landscape renovation cases were analyzed. 4. Landscape remediation measures at three levels: space, historical value of the plant, and biological level are proposed according to the soil and water conditions. [Conclusion] It will provide some references and lessons for industrial brownfield renovation, and help to improve the ecological quality and recreational value of brownfield sites of Baosteel industrial sites with multiple measures.

Measurement and Evaluation of Potential Ergonomic Hazards in the Packing Area of PT Tirta Investama Klaten Factory

PT Tirta Investama Klaten Factory is a company that produces bottled drinking water. Most production activities use machines, but there are still activities carried out manually, namely in the packing area during box lifting activities. Box lifting activities that are carried out repeatedly over a certain period can potentially cause occupational diseases, namely musculoskeletal disorders. After conducting initial interviews with workers, it was discovered that workers in the packing area felt pain and tingling in their bodies. Based on these problems, it is necessary to measure and evaluate potential ergonomic hazards to identify potential health and worker protection problems due to ergonomic hazards. The method used SNI 9011:2021, a tool for measuring and evaluating potential ergonomic hazards in the workplace, and used QEC (Quick Exposure Checklist) to measure posture load from two points of view. The research results showed that the box lifting activity had the worst percentage exposure value of 76.14% and the worst ERF score of 7 (hazardous conditions). Apart from having an awkward posture, the results showed that symptoms of musculoskeletal disorders experienced by workers were also caused by factors such as age and length of service.

INVESTIGATION OF SURFACE SOIL NICKEL CONTENT: A CASE STUDY OF ADIYAMAN PROVINCE

INVESTIGATION OF SURFACE SOIL NICKEL CONTENT: A CASE STUDY OF ADIYAMAN PROVINCE