Environmental Research Center Research Articles

Case Study: Understanding H2S Occurrence: Bakken Production Using Sulfur Isotopes

_ Souring—or H2S generation—in the Bakken petroleum system (BPS) production is becoming problematic for oil producers and pipeline operators because of the sporadic occurrence and associated economic and HSE impacts. Paradoxically, crude oil produced from the tight Middle Bakken (MB) and underlying Three Forks (TF) reservoirs of the BPS has historically been light (40 °API to 50 °API) with low sulfur content (<0.2 wt.%), typically exhibiting nonexistent to low (<10 parts per million) H2S concentrations. Additionally, neither the MB nor the TF reservoirs have public records indicating the presence of H2S during drillstem tests (DST). However, based on previous work performed by the University of North Dakota Energy & Environmental Research Center (EERC), the frequency of H2S occurrence in BPS wells has increased from 2010 to 2023. Even though the observed H2S increases correlate with larger, multistage well stimulation and completion practices in the BPS, the unclear geographical and temporal trends make the exact mechanisms responsible for souring an open research question. At least five known mechanisms can potentially lead to H2S occurrence in the oil production stream of BPS wells, including: 1. Thermochemical sulfate reduction (TSR) 2. Bacterial sulfate reduction (BSR) 3. Source rock generation 4. Migration from deeper or shallower H2S reservoirs 5. Geochemical mechanisms related to reservoir stimulation work (Table 1). Understanding the mechanisms of H2S generation might reduce the risk of souring in new wells and enable more effective mitigation and management strategies in the wells already producing H2S. Samples Used in the Study This study is focused on oil and gas operations in the North Dakota portion of the Williston Basin and the H2S occurrences in the BPS, which includes two main oil-producing reservoirs: the MB and the TF. In the simplified stratigraphic sequence, the BPS comprises three distinctive lithofacies. From deepest to shallowest, those lithofacies are the Lower Bakken Shale (LBS), the MB reservoir, and the Upper Bakken Shale (UBS). Underlying the BPS is the TF, the upper part of which is the oil-rich TF reservoir, considered part of the BPS. The UBS and LBS are the source rocks for the oil in MB and TF reservoirs and consist of black, organic-rich, siliciclastic mudstones (i.e., shale). Directly overlying the BPS is the Madison Group, a carbonate-dominated Mississippian section that is subdivided into three formations—the Lodgepole (LP), Mission Canyon (MC), and Charles. The Birdbear Formation lies beneath the TF and on top of the Duperow Formation. Both the Duperow and Birdbear Formations produce oil and are dominated by carbonate deposits of shallow marine limestone and dolostones. A sampling program was developed to investigate areas of the BPS with varying levels of souring in the production stream and multiple organic-rich formations representing potential source rocks, including the UBS, LBS, LP, and MC. The samples were collected from locations and formations with different lithologies and maturity levels. Over 70 sour wells were identified for H2S sampling in western North Dakota.

Treatment of Domestic Wastewater Using Membrane Bioreactor (MBR) Pilot Plant: A Case Study of Wastewater from Kklung Hok’s Treatment Pond and The Environmental Research and Training Centre (ERTC), Pathumthani, Thailand

This research performant of Membrane Bioreactor (MBR) pilot plant for treatment of Wastewater from Khlung Hok’s treatment pond volume of 250 liter and The Environmental Research and Training Centre (ERTC) volume of 100 liter, both wastewater was mix on MBR. Aeration was fed at air flow rate 150 l/min over two hours to provide the oxygen for microorganisms. Further, Aeration was fed continuously for 6 hours. sample were collected every one hour. Result found that: the wastewater variation of pH, DO, BOD, COD, NH4+, NO2– concentration of the feed tank from Khlung Hok’s treatment pond were 7.16, 0.60 mg/l, 95mg/l, 157 mg/l, 34.96 ppm and NO2 not found and from ERTC’s wastewater were 6.87, 0.41 mg/l, 93 mg/l, 160 mg/l, 21.23 ppm and 0.043 ppm, respectively. After air flow in MBR over 2 hour the concentration of influent was found 6.64, 0.60 mg/l, 48 mg/l, 105.67 mg/l, 22.30 ppm and 0.031 ppm, respectively. And during the whole process effluent pH concentration were between 6.64-7.46, DO were between 1.11-5.8 mg/l. The removal BOD efficiency were over 89.58% (on 5th hour), COD were over 75.39% (on 4th hour), NH4 were over 53.61% of (on first hour) and were over NO2 48.71% of (on 2nd hour), respectively. Result indicated that effective removal BOD, COD, NH4+ and NO2– by MBR could be achieved and increased in scale for use in the fieldwork or the treatment of wastewater in the environment.

Preface

Proceeding of The 7th International Symposium on Green Technology for Value Chains (GreenVC) 2023 November 14-15, 2023 Bandung, West Java Indonesia Organized by: Research Center for Environmental and Clean Technology National Research and Innovation Agency (BRIN) The seventh International Symposium on Green Technology for Value Chains (GreenVC) 2023 was held on November 14-15, 2023, as a hybrid event in Bandung, West Java, Indonesia. The fundamental goals of this symposium were to exchange ideas and information, encourage technology development, and strengthen networking and collaboration among all attendees. The symposium was organized by the Research Center for Environmental and Clean Technology, National Research and Innovation Agency (BRIN). The GreenVC 2023 is an annual international symposium that was first held in 2016. This year’s theme is Unlocking a Sustainable Future through Green Technology Innovations. Due to the transition from the pandemic situation, the symposium should be held as a hybrid event, combining virtual and physical, with some attendees joining in person and others joining remotely online. On the positive side, we could gather 9 keynote speakers (5 attend in person and 4 attend virtually), 5 invited speakers (2 attend in person and 3 attend virtually), 102 presenters (46 attend in person and 56 attend virtually), and participants from various places including Japan, Sri Lanka, Australia, Taiwan, Netherlands, Malaysia, Italy, and of course Indonesia. We were gathered to share knowledge and exchange experiences through meaningful discussions on the latest innovations and technologies in environmental issues. The proceeding of GreenVC 2023 presents the original and unpublished results in all areas of interest. In total, 69 papers have been selected to be published based on the originality of the research and the relevance with the symposium topics: environmental remediation and reclamation; green material and sustainable nanotechnology; waste valorization and biorefineries; smart solutions for climate change and environmental monitoring; and water, sanitation, and hygiene. We would like to express our sincere gratitude to our Advisory Board, Scientific Board, Editorial Board, and Scientific Reviewers for their positive contribution to the quality of the articles presented in this proceeding. We also would like to appreciate all participants attending this symposium as well as the Organizing Committee, who made the symposium a success. Dr. Veny Luvita M.T. Chief Editor List of Committee, Main Rundown and Sponsorship are available in this Pdf.

Island Water Management Cyprus Facts Finding Mission and Gap Identifications

Water management on islands faces unique challenges due to limited size, isolation, climate change impacts, and economic development needs. These factors intensify water scarcity, highlighting the need for sustainable resource development through multidisciplinary approaches. Cyprus, the third-largest Mediterranean island, exemplifies these challenges, with the lowest water availability per capita in the region and severe water scarcity exacerbated by climate change. Addressing these issues requires a comprehensive master plan that integrates technical, environmental, social, and economic factors, focusing on climate change impacts on the water cycle. The Energy, Environment, and Water Research Center (EEWRC) plays a pivotal role in global resource management, emphasizing sustainable development goals and Integrated Water Resources Management Policy. EEWRC’s key initiatives include hydrodiplomacy and WEF Nexus and Integrated Water Resource Management IWRM, monitoring sediment transport pollution, water quality monitoring of basins and aquifers, smart water management of conventional and non-conventional water, and nature-based solutions for water and land management integration. To improve water management in Cyprus, establishing a National Commission for Water Experts is recommended. This commission would provide a detailed roadmap for water management, aligning with Sustainable Development Goals (SDGs) and the Climate Change Initiative coordinated by the Cyprus Institute. Additionally, organizing a conference focused on “Cyprus Island Water Management” would help launch this concept. In conclusion, it is crucial to develop a long-term strategy for optimal water resource management in Cyprus, addressing water issues, promoting conservation, launching climate-resilient initiatives, and fostering collaboration with national and international entities for success.

Evaluation of Acute Toxicity of Cardiovascular Drugs in Cases Presented to the National Environmental and Clinical Toxicology and Research Centre during 2022 - Egypt

Evaluation of Acute Toxicity of Cardiovascular Drugs in Cases Presented to the National Environmental and Clinical Toxicology and Research Centre during 2022 - Egypt

Modification of Hybrid Receptor Model for Atmospheric Fine Particles (PM2.5) in 2020 Daejeon, Korea, Using an ACERWT Model

Hybrid receptor models overestimate the contribution of background areas (no specific emission sources), like the Yellow Sea in Korea. This study aimed to improve model performances using Advanced Concentration Emission and Retention Time Weighted Trajectory (ACERWT). ACERWT was combined with a positive matrix factorization (PMF), back trajectory, and Regional Emission Inventory in Asia (REAS). The PMF receptor model used one year of data from Korea’s Central Air Environment Research Center. In the PMF receptor model, eight sources (dust/soil, secondary nitrate, biomass burning, vehicles, secondary sulfate, industry, coal combustion and sea salt) influenced PM2.5 pollution at the receptor site (Daejeon, Korea). Secondary sulfate was the most dominant source, followed by secondary nitrate and vehicle sources. ACERWT results showed high contributions from China, Japan, and Korean regions, while the contribution from the Yellow Sea was significantly lower. Several regions, such as the eastern and south-eastern areas of China, the southern area of Taiwan, the western area of Tokyo, and the central area of Korea, showed high contributions due to large-scale emission facilities and industrial complexes. In this study, the ACERWT model significantly improved its performance regarding regional contributions to PM2.5 pollution at the receptor site.

Effects of Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species

Coastal wetland communities provide valuable ecosystem services such as erosion prevention, soil accretion, and essential habitat for coastal wildlife, but are some of the most vulnerable to the threats of climate change. This work investigates the combined effects of two climate stressors, elevated temperature (ambient, + 1.7 °C, + 3.4 °C, and 5.1 °C) and elevated CO2 (eCO2), on leaf physiological traits of dominant salt marsh plant species. The research took place at the Salt Marsh Accretion Response to Temperature eXperiment (SMARTX) at the Smithsonian Environmental Research Center, which includes two plant communities: a C3 sedge community and a C4 grass community. Here we present data collected over five years on rates of stomatal conductance (gs), quantum efficiency of PSII photochemistry (Fv/Fm), and rates of electron transport (ETRmax). We found that both warming and eCO2 caused declines in all traits, but the warming effects were greater for the C3 sedge. This species showed a strong negative stomatal response to warming in 2017 and 2018 (28% and 17% reduction, respectively in + 5.1 °C). However, in later years the negative response to warming was dampened to < 7%, indicating that S. americanus was able to partially acclimate to the warming over time. In 2022, we found that sedges growing in the combined + 5.1 °C eCO2 plots exhibited more significant declines in gs, Fv/Fm, and ETRmax than in either treatment individually. These results are important for predicting future trends in growth of wetland species, which serve as a large carbon sink that may help mitigate the effects of climate change.

14C MEASUREMENT OF SAMPLES FOR ENVIRONMENTAL SCIENCE APPLICATIONS AT THE NATIONAL ENVIRONMENTAL ISOTOPE FACILITY (NEIF) RADIOCARBON LABORATORY, SUERC, UK

ABSTRACT The National Environmental Isotope Facility (NEIF) Radiocarbon Laboratory at the Scottish Universities Environmental Research Centre (SUERC) performs radiocarbon measurement of a wide range of sample matrices for applications in environmental research. Radiocarbon is applied to palaeoenvironmental, palaeoceanographic, and palaeoclimatic investigations, as well as work to understand the source, fate, turnover, and age of carbon in the modern carbon cycle. The NEIF Radiocarbon Laboratory supports users in the development and deployment of novel sampling techniques and laboratory approaches. Here, we give an overview of methods and procedures used by the laboratory to support the field collection, laboratory processing, and measurement of samples. This includes in-house development of novel and/or specialized methods and approaches, such as field collection of CO2 and CH4, hydropyrolysis, and ramped oxidation. The sample types covered include organic remains (e.g., plant material, peat, wood, charcoal, proteins), carbonates (e.g., speleothems, foraminifera, mollusc shell, travertine), waters (dissolved organic and inorganic carbon), gases (CO2 and CH4), soils and sediments (including sub-fractions).

Prediction of Atmospheric Carbon Dioxide Radiative Transfer Model based on Machine Learning

Global warming is caused by the increasing amount of greenhouse gases in the atmosphere. The Kyoto Protocol to the United Nations Framework Convention on Climate Change defines carbon dioxide (CO), methane (CH:), nitrous oxide (N0) fluorocarbons (HFC), holocarbon (PFC), and sulfur hexafluoride (SF.) Six gases are divided into the main greenhouse gases, of which CO, the largest proportion of emissions, is an important man-made greenhouse gas." As the main gas affecting the global greenhouse effect (75%), the amount of CO in the atmosphere has increased from 315 ppm in 1958 to 417 ppm in 2022, and global annual CO emissions have increased from 27 Pg to 49 Pg% over the past 40 years. Therefore, under the background of deep reinforcement learning, it is a problem that all countries pay more attention to predict the concentration emission of carbon dioxide to cope with the severe situation of climate warming. In order to obtain the radiative forcing value under the influence of carbon dioxide concentration, a simplified net radiative flux model is established. Based on the radiative transfer equation, this model can calculate the net radiative flux and radiative forcing of each layer of the atmosphere due to changes in carbon dioxide concentration. The results are compared with the RRTMG-LW long-wave radiative transfer model of American Center for Atmospheric and Environmental Research (AER) under the same factor, and the error is less than 1%.

An Integrated Frac Geometry Control Approach To Prevent H2S Production

_ Hydrogen sulfide (H2S) production has in recent years become a mounting issue facing operators and midstream companies in major US basins. At present, H2S production appears to be random and poorly understood. As such, H2S is considered by many to be an unpreventable nuisance and one that is largely addressed by treating the dangerous gas at surface before putting it to a sales line. This article highlights impacts of H2S, possible sources, and a successful case study of a completions operation designed specifically to prevent H2S production in North Dakota’s Williston Basin. H2S and Its Impacts H2S is a colorless gas known for its pungent “rotten egg” odor at low concentrations. It is extremely flammable, highly toxic, poisonous, and corrosive. H2S is commonly encountered during the drilling and production of crude oil and natural gas, as well as in wastewater treatment, utility facilities, and sewers. H2S is well-known for its significant health and safety risks, along with substantial financial implications in the event of an accidental release. The substance ranks as the second leading cause of workplace gas inhalation deaths in the US. This is according to the US Bureau of Labor Statistics, which concluded that H2S caused 46 worker deaths between 2011 and 2017. Due to its corrosiveness, wells that produce even small volumes of H2S may compromise wellbore integrity and lead to premature failure of production equipment. Sour oil and gas is considered to have about 10% lower profit margin than traditional sweet Bakken crude (SPE 141434). An electrical submersible pump replacement can cost an operator up to $250,000, plus production downtime. Additionally, according to one leading chemical company, it costs $2,250 per day to treat 200 ppm H2S at a typical gas production rate of 2,000 Mcf/D. H2S Sources A recent study, URTeC 3852794, published by the Energy and Environmental Research Center (EERC) at the University of North Dakota suggests three possible causes of H2S: geo-mechanical, thermochemical, and biogenic. Geo-mechanical: Mission Canyon organic-rich intervals could be a source of H2S for a limited number of the Bakken producing wells via communication between reservoirs caused by out-of-zone stimulation work. This conclusion was evidenced by matching the δ34S isotope between 30 H2S producing wells and formation cores. Thermochemical sulfate reduction (TSR): Another possible mechanism of H2S generation involves the presence of anhydrites and hydrocarbons at a higher reservoir temperature of 110° to 150°C. This mechanism is plausible for wells with the δ34S in the range from +10 to +19‰. The EERC research team is currently investigating the TSR existence in the Williston Basin. Biogenic: This third mechanism of reservoir souring is questionable in the Bakken because of the high reservoir temperatures (110° to 150°C) and elevated salinity of the formation water (TDS 200,000 mg/L) making microbial growth unlikely, especially in the context of the predominance of heavier 34S isotope (δ34S of +2 to +19‰) in produced H2S.

On-Site Risk Analysis is possible with drones...

The 66th period events of the 1 Topic 1 Guest event organized by Üsküdar University Occupational Safety, Occupational Health and Environmental Health Application and Research Center ÜSGÜMER were held.

Leaf traits linked to structure and palatability drive plant-insect interactions within three forested ecosystems.

Plant traits and insect herbivory have been highly studied within the modern record but only to a limited extent within the paleontological. Preservation influences what can be measured within the fossil record, but modern methods are also not compatible with paleobotanical methods. To remedy this knowledge gap, a comparable framework was created here using modern and paleobotanical methods, allowing for future comparisons within the fossil record. Insect feeding damage on selected tree species at Harvard Forest, the Smithsonian Environmental Research Center, and La Selva were characterized using the damage type system prevalent within paleobotanical studies and compared with leaf traits. Linear models and random forest analyses tested the influence of leaf traits on total, specialized, gall, and mine frequency and diversity. Structural traits like leaf dry mass per area and palatability traits, including lignin and phosphorus concentrations, are important variables affecting gall and mine damage. The significance and strength of trait-herbivory relationships varied across forest types, which is likely driven by differences in local insect populations. This work addresses the persistent gap between modern and paleoecological studies focusing on the influence of leaf traits on insect herbivory. This is important as modern climate change alters our understanding of plant-insect interactions, providing a need for contextualizing these relationships within evolutionary time. The fossil record provides information on terrestrial response to past climatic events and, thus, should be implemented when considering how to preserve biodiversity under current and future global change.

Enhancing Youth Capacities on Climate Change Adaptation and Drinking Water Management

This was a small study to improve knowledge and build capacity among the youths of the selected four secondary schools on the impacts of climate change and its adaptation and mitigation in drinking water management, as well as its use perspectives inside the Chitra-Nabaganga Area Water Partnership at Narail District in Bangladesh. The study was implemented by the Environment and Population Research Centre, Bangladesh, in financial collaboration with Bangladesh Water Partnership and the Global Applied Research Network - South Asia. The study included classroom training focusing on climate change and its impacts, water safety and its management, and knowledge about water disinfection methods during floods. This study found that knowledge about water disinfection methods during floods, such as "boiling arsenic-free water" and "using chlorine solution," improved significantly p &lt;.01) in the end-line from the baseline survey. The level of knowledge about flood preparedness, causes, and potential consequences of climate change also increased significantly p &lt;.01). According to the findings of this study, training can increase the skills of young students and turn them into active learners who are interested in gaining more knowledge about contemporary issues.

THE EFFECT OF TRAINING AND WORK MOTIVATION ON EMPLOYEE PERFORMANCE IN THE OFFICE OF THE INDONESIAN ENVIRONMENTAL AND FORESTRY RESEARCH AND DEVELOPMENT CENTER IN MAKASSAR

The purpose of this study was to test and analyze the effect of training and work motivation on employee performance at the Makassar Research and Development Center for Environment and Forestry. Data collection uses primary data obtained from questionnaires using saturated sampling techniques. The population is all permanent employees at the Makassar Research and Development Center for Environment and Forestry with a total of 51 people. The results of the questionnaire have been tested for validity and reliability, and the classical assumptions in the form of normality assumptions and heteroscedasticity assumptions have been tested. Methods of data analysis using multiple regression techniques. The results showed that the proposed hypothesis was accepted because it showed positive and significant results of hypothesis testing. This means that Training and Work Motivation have a positive and significant effect on Employee Performance.

Enhanced oil recovery through alternating gas Re-injection to reduce gas flaring in the Bakken

Environmental performance is a significant driver of energy production today, and providing attractive methods to reduce flaring remains a high priority for oil producers. The Energy & Environmental Research Center (EERC), with support from the Bakken Production Optimization Program (BPOP), is investigating the reinjection of the associated gas into producing wells to reduce flaring.The project's main objectives are to evaluate technically and economically the feasibility of deploying alternating gas re-injection in the Bakken formation as a means to increase oil recovery, reduce flaring and maintain compliance. The approach addresses the compression capacity constraints, mineral ownership types, and gas availability. Gas reinjection has the added benefit of producing incremental oil that can offset installation and operational costs associated with gas compression and nonproducing time for a well during injection. A flow simulation model is created to investigate alternating gas injection of a four-well pad and to assess the possibility of incremental oil production. Extensive numerical simulation is conducted. Capital expenditure, operating costs and the revenue from oil recovery were considered. Results indicate that gas injection within rates of 100–200 Mcfd can produce incremental oil. The gas volume needed is greater than what is typically flared from a facility, however, less than the total produced gas volume, and, therefore, possible. Communication of gas is likely to occur between wells within 1500 feet and wells positioned heel to heel that are common to the well-pad facility. The most promising injection period appeared to be within a 2-week to 1-month cycle. Thus, the proposed approach can be employed as an efficient Enhanced Oil Recovery (EOR) technique, alternating gas injection of 3 MMcfd may potentially increase the produced oil rate by 70 %. The findings support continued work to further investigate well configurations that can best benefit from the technique and to mature economic case studies.

Preface

Preface

On Regenerative African Futures

This think piece is a sensorial grappling with slippery paradoxes within Regenerative African Futures that persist in elusive ways. It hopes to trouble conditionalities (either /or thinkings) that stagnate our ability to move into Regenerative Futures. In a world where the tendency to bifurcate is part of our programming, this piece wonders how practicing a sense of awareness around the paradoxes of sovereignty, belonging, death and forgiveness might help us arrive at a more radical embrace. Perhaps by attending to the slippery edges of the continuum we can begin to be aware of the streams we are embroiled in, and make greater strides into praxis-based responses that do not shy from these. This piece reflects the collective work underway over the last few years for co- conspirators who have been working with and around the Environmental Learning Research Centre at Rhodes University, South Africa. It suggests that transcending these paradoxes requires a deep sense of soul-based grounding that can help us make home and sanctuary for our most expansive selves.

Round-Robin Interlaboratory Study on Rare-Earth Elements in U.S.-Based Geologic Materials

In a study funded by the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL), the University of North Dakota (UND) Energy and Environmental Research Center (EERC) performed a first-of-its-kind round-robin interlaboratory study (RRIS) to determine lab-to-lab and method-to-method variability in analyzing the rare earth element (REE) content of domestic resources. Analyses of REEs on eleven different materials were accomplished by the laboratories using four different procedures: ASTM D6357 (Procedure A), ASTM D4503 (Procedure B), an alternate in-house procedure for digestion and REE analysis (Procedure C), and neutron activation analysis (NAA). The results of the RRIS suggest that NAA is the most accurate and reliable method for many of the REEs in these types of materials; however, the method is limited in that it is able to determining only ten of the sixteen REEs. Five of the seven labs reporting data for Procedure A and three of the five labs reporting for Procedure B showed excellent performance in terms of repeatability, reproducibility, agreement with NAA, and SRM recoveries based on AOAC International guidelines on method performance. This indicates that when strictly followed these methods are suitable for REE determination in most materials, although are subject to the overall capabilities and experience of individual laboratories.

The Impact of COVID-19 on Intoxication Pattern by Drugs of Abuse in Egypt

Background: Drug abuse is considered a global and growing problem worldwide. Emergency medical care is required for acute intoxication, which adds to the threat of COVID-19. This study aims to evaluate the effect of the COVID-19 pandemic on the pattern of acute toxicity in drug abuse patients admitted to National Environmental and Clinical Toxicology and Research Center (NECTR), Cairo University. Methods: This comparative study included 978 cases admitted to NECTR during 12 months before the COVID-19 pandemic (2018-2019) and 12 months during the pandemic (2020-2021). Results: The number of cases during the pandemic was lower than before; adults and men predominate in both periods. During the pandemic, cannabis, heroin, opium, and alcohol showed a mild increase, while the new synthetic drugs, tramadol, and pregabalin, showed a mild decrease. A significant increase in discharges and a decrease in intensive care unit (ICU) admissions were observed during the pandemic. Besides, more oxygen (O2) therapy was required, and more cases died on mechanical ventilation. The worst outcome was associated with old age, male gender, heroin and opium toxicity, and the highest score of poisoning severity. Conclusion: The COVID-19 pandemic had a definite reforming effect on the pattern of intoxication by drugs of abuse in NECTR, Egypt.

SEBARAN KONSENTRASI LOGAM BERAT DI LAHAN PERTANIAN KABUPATEN WONOSOBO

The agricultural sector is still the leading sector of the economy in Wonosobo Regency. Its superior commodities include paddy rice, tea, tobacco, coffee, and vegetable plants. In the practice of agricultural activities, it is inseparable from the use of inorganic fertilizers and persistent chemical pesticides that cause heavy metal contamination in agricultural land. Industrial waste around agricultural land that enters the water body also contributes to the accumulation of heavy metals in the soil of the water for irrigation. This study aimed to determine the distribution of heavy metal content of Pb, Cd, Ni, Co, Cr, and As on the agricultural land of Wonosobo Regency. The study was conducted on the agricultural land of Wonosobo Regency. As many as 312 soil samples were taken from a layer of sports (depth of 0-20 cm) of agricultural land in ten sub-districts of Wonosobo Regency. Soil sample analysis included heavy metals Pb, Cd, Ni, Co, Cr, As, organic Carbon, CEC, and soil texture. The analysis was carried out in an integrated laboratory, the Agricultural Environment Research Center. The results showed the concentration of heavy metals detected in Wonosobo Regency agricultural land respectively Pb &gt; Co &gt; Ni &gt; Cr &gt; As &gt; Cd. These heavy metals in the soil are still in normal concentrations and are safe for agricultural land.