Disposal Point Research Articles

Study of Growth Rate in Nile Tilapia (Oreochromis niloticus)

This study shows the effect of wastewater of El-Sail Drain on the strength of Oreochromis niloticus gathered from two destinations of River Nile at Aswan Governorate. The physicochemical parameters of water such as pH, electric conductivity, complete broke down solids, disintegrated oxygen, organic and concoction oxygen requests; nitrite, nitrate and alkali were resolved. Substantial metals (Cu, Pb, Cd and Ni) fixations in water and fish tissues were recognized. The microbiological, parasitological and neurotic states of fish were likewise researched. Higher estimations of pH, EC, BOD and COD were recognized in site II than from site I. As opposed to DO, nitrite, nitrate and smelling salts which were lower in site II. Substantial metals focuses in water of both sites, particularly Ni, Pb and Cd surpassed as far as possible and its abundance followed the order: Pb>Ni>Cd>Cu. Total bacterial count, all out coliform, Salmonella sp., Shigella sp. and E. coli were recognized in higher numbers in water tests from site II. Additionally, the fish got from that site revealed higher bacterial and parasitic contamination. The bioaccumulation of Ni and Pb surpassed the most extreme allowable limit; in any case, Cu and Cd focuses were underneath as far as possible in various tissues. The bioaccumulation variable of Cu demonstrated its most noteworthy worth in liver. The histopathological injuries were more prominent in fish gathered from site II. Thus, expending fish got from the considered locales around El-sail drain disposal point speaks to serious risk on human health.

Contamination Composition of Fe, Mn and Al at 8 Different Profiles of Solid Waste Disposal Areas in Malaysia

Solid waste is a major issue in environmental management as it was generated by almost every single person in the world. In Malaysia, it is estimated 0.8 kg solid waste dumped by one person in rural area and 1.5 kg by person in urban area in a day. Landfill as a final waste disposal point is currently in critical number where it keeps on increasing every year. The most serious issues is landfill may cause air, water and soil pollution as waste disposed at landfill may produce leachate through water runoff at the area. Hence, this research aimed to assess the contamination level of three types of heavy metal which are Iron, Manganese and Aluminum (Fe, Mn, Al) at 8 selected contaminated landfill areas in Selangor, Perak and Melaka. As a result, Fe exhibited highly contamination level ranged from 0.15 mg/L to 0.77 mg/L followed by Mn ranged from 0.06 mg/L to 0.57 mg/L and the lowest is Al ranged from 0.04 mg/L to 0.08 mg/L. Interestingly Perak solid waste disposal area was found to have the highest Fe content (0.77 mg/L), substantially higher than all other areas tested. In contrast Mn was detected highest (0.57 mg/L) in Selangor landfill area. There was positive relationship between type and total content of heavy metals and location of landfill area. Therefore, collaboration and concern from authority and public in managing solid waste may help to reduce the pollution as these types of heavy metal may cause bad impact to the environment and surely human health.

LUSI MITIGATION IMPLICATIONS OF BPLS AND OTHER SUBSIDENCE MEASUREMENTS

Since the beginning of LUSI eruption, extrusion of mud has been accompanied by deformation of the land surface extending out as much as three km from the main vent. Deformation generally consists of subsidence, however also includes uplift in certain areas and minor surface faulting and cracking as surface blocks of sediment move. BPLS monthly leveling since 12/2007 by laser surveying gives the most reliable measure of vertical movement around the perimeter of the mud ponds. This has been augmented by differential GPS measurements that extends farther out. Subsidence beneath the mud within the levees is difficult to be measured accurately. Rapid subsidence, rising mud, and continuous addition of dirt to maintain the internal dikes make it impossible to maintain a system of benchmarks in the inner area. Shape of the surface beneath the mud can be estimated by indicators such as early GPS measurements, tilting of partially buried buildings, and the rate at which tiers of sandbags have disappeared beneath the mud. We have synthesized all available data to produce a contour map of estimated total deformation for the first 35 months of eruption despite limitations of the data such as variable quality, contradictions, poor point distribution, and observations over variable time intervals.
 
 Pre-eruption land surface near LUSI was a nearly level plain about 4 m above MSL sloping about 0.45 m/km NE toward the sea and away from the artificially high channel and levees of the Porong River. Land around the vent has subsided in the form of an asymmetrical shallow funnel where the gentle tilt of about 10 m/km around the margins increases dramatically near the vent. Early ITB continuous differential GPS measurements of horizontal movement indicated a point of maximum subsidence about 250 m northwest of the main vent. Our contours indicate 65 million m³ of mud is presently stored. About 60% occupies the subsidence depression, the rest is confined by the dikes. About 200 m south of the vent is a flexure zone trending generally east-west that separates fast subsidence from slower subsidence to the south. This flexure has caused difficulty in mitigation by blocking flow of mud southward towards disposal points along the Porong River.
 
 On the west side of the subsidence cone, flexure toward the vent area has stretched the ground surface, breaking it with steep north-northeast trending fractures that localize methane gas venting. These resulting blocks settle unevenly, creating horsts and grabens with offset less than 15 cm. This fracturing probably extends east beneath the levees although it is not clearly expressed there. Transverse to this pattern near the former toll road bridge is a 100 m-wide zone characterized by the highest subsidence rates outside the levees. This subsidence of about 1.5 m in three years is much less than an estimated 40 m subsidence beneath the mud near the vent, but lies across natural drainage and causes local flooding. At present rates of subsidence, this area will be below sea level in four years and become a pond unless constantly pumped. Until the road realignment is completed, most of the commercial traffic of East Java must travel through this area, and the proposed realignment still lies perilously close to northwesterly expanding subsidence. Increased methane venting and ground cracking has made West Siring Village too hazardous for continued habitation.
 
 Keywords: Subsidence, mitigation, LUSI, mud, eruption

Autonomous Vehicle Emergency Recovery Tool: A Cooperative Robotic System for Car Extraction

Vehicles have been proven to be an ideal means for terrorists because they can be meticulously prepared well in advance before being deployed in urban and public places. To increase the risk and burden of explosive ordnance disposal teams, third-party vehicles have also been used to block the access path to the explosive loaded vehicle. In this paper, we present a multirobot system that can remove vehicles from confined spaces with delicate handling, swiftly and in any direction to a safer disposal point. The new lifting robots, capable of omnidirectional movement, autonomously underride the identified vehicle and dock to its wheels for a synchronized lifting and extraction. The validity and efficiency of the novel robotic system is illustrated via experiments in an indoor parking lot, demonstrating successful autonomous navigation, docking, lifting, and extraction of a conventional car for a total covered distance of 20 m.

Transport and Retention of Polyvinylpyrrolidone‐Coated Silver Nanoparticles in Natural Soils

Transport and retention of polyvinylpyrrolidone‐coated silver nanoparticles (PVP‐AgNPs) were examined in water‐saturated columns packed with three types of natural soils: a clay loam red soil (RS), a sandy loam fluvo‐aquic soil (FS), and a loam huangni soil (HS). Specific factors investigated included monovalent K+ and divalent Ca2+ concentrations and the coupled effect of Ca2+ with humic acid (HA) at a PVP‐AgNP concentration of 10 mg L−1 and Darcy velocity of 0.182 cm min−1. Our results showed that transport of PVP‐AgNPs decreased with increasing K+ and Ca2+ concentrations, primarily due to enhanced aggregation of PVP‐AgNPs and reduced repulsive interactions between PVP‐AgNPs and soil grains. Consistent with the Derjaguin–Landau–Verwey–Overbeek theory, retention of PVP‐AgNPs was more pronounced in the presence of Ca2+ than K+. However, the presence of HA significantly weakened the mobility of PVP‐AgNPs with increasing Ca2+ concentration, probably due to increased aggregation of PVP‐AgNPs (forming a HA–Ca–PVP‐AgNPs complex). Irrespective of solution chemistry, the mobility of PVP‐AgNPs in all three soils remained in the order of RS < FS < HS. Principal components analysis indicated that the mobility of PVP‐AgNPs was positively correlated with pH, cation exchange capacity, and soil organic matter content and was negatively correlated with Fe oxide content and specific surface area of the soils. Overall, our findings highlight the dominant role of soil physicochemical properties in the mobility of Ag nanoparticles in natural soils and the importance of investigating these factors to better understand the fate of engineered nanoparticles in natural environments at the point of disposal and protecting groundwater resources.

Assessment Of Hair Barbing Salon Waste Management Practices In Bama Township Of Borno State, Nigeria

The study assessed hair barbing salon Waste Management Practices in Bama. A set of questionnaire was administered to barbing salon proprietors to obtain their current barbing salon waste management styles, viz a viz the types of waste generated and methods of waste disposal. Data obtained were analyzed descriptively and reveals hair as the dominant waste generated in barbing salon operations. The hair wastes are swept and packed using coconut brooms and plastic hand shovel and stored in paper cartons. They are hence disposed on weekly or monthly basis or whenever cartons are filled up at refuse disposal points along streets within the neigbourhood, outskirt of the town, a large trench left behind by Cubits Civil Engineering Construction Company and the Yedseram river valley or at best burnt or buried. The adoption of these disposal techniques is more or less the same technique used in the disposal of all forms of refuse in the study area where wastes are disposed with impunity. In the same vein, there is a significant level of awareness of the impact of salon waste management practices on the environment/society by perpetrators. The study recommended steps for better barbing salon waste management to include salon waste reuse and recycling by researching into how barbing salon wastes can be a resource.

Assessment of municipal solid waste management practices in Jimeta-Yola Adamawa State Nigeria

This paper presents an overview of the current solid waste management practices in Jimeta town and provides a brief discussion on the future challenges. Jimeta is the administrative headquarter of the Adamawa state. The population has been on a steady increase mainly due to influx of people and its strategic location along axial route linking major cities in the northeast region. Data for this study were obtained from the Adamawa State Environmental Protection Agency (ASEPA) and relevant literature. Records show that waste are neither sorted nor recycled but dumped in an open dumpsite 3 km away from the city. The performance of agency regarding waste evacuation from source of generation to final disposal point has improved but not been impressive from 2004 to date. Results shows that the agency performed below average as large tonnage of solid waste can be seen at designated dumpsites thereby blocking drainage channels and access road. Thus, 11,747 tons of solid waste was collected over the period of 4 years from 2004-2008. However, this figure increased to 16,151 tons in 2009-2013. This achievement was as a result of change in the leadership of the management team and better funding from the government. It is advocated that solid waste management should not be left in the hands of government agency alone. The public and related stakeholders should actively participate in the management of solid waste so as to have a functional environment for working, living and playing.

Waste collection routing—limited multiple landfills and heterogeneous fleet

This article deals with a real‐life waste collection routing problem. To efficiently plan waste collection, large municipalities may be partitioned into convenient sectors and only then can routing problems be solved in each sector. Three diverse situations are described, resulting in three different new models. In the first situation, there is a single point of waste disposal from where the vehicles depart and to where they return. The vehicle fleet comprises three types of collection vehicles. In the second, the garage does not match any of the points of disposal. The vehicle is unique and the points of disposal (landfills or transfer stations) may have limitations in terms of the number of visits per day. In the third situation, disposal points are multiple (they do not coincide with the garage), they are limited in the number of visits, and the fleet is composed of two types of vehicles. Computational results based not only on instances adapted from the literature but also on real cases are presented and analyzed. In particular, the results also show the effectiveness of combining sectorization and routing to solve waste collection problems. © 2015 Wiley Periodicals, Inc. NETWORKS, Vol. 65(2), 155–165 2015

Informal Collection of Household Solid Waste in Three Towns of Anambra State, Nigeria

Abstract Management of urban solid waste implies the collection, transfer, treatment recycle, reuse and disposal of such waste. Collection of urban household solid waste traditionally rests with government agencies designated with such responsibility. Solid waste collection begins from storage at the household level to the final treatment or disposal point and represents the most important aspect of urban solid waste management. Little has however been written on urban household solid waste collection in Nigeria. Using empirical data from three urban areas of Anambra State, Nigeria, the paper examines the place of informal private solid waste collectors in household solid waste collection. The ANOVA technique is used to test the null hypothesis that the sample means of the distance to designated community/street solid waste collection containers in the residential neighbourhoods of the three towns are equal. We conclude on household patronage of informal private solid waste collectors as against government provided community/street collection containers in the areas studied.

Pollution and Encroachment of Phuleli Canal along the Periphery of Hyderabad City of Pakistan

Rivers and canals are major source of irrigation and drinking water that have been badly polluted with industrial waste and sewage water. Fecally contaminated canal water is a major source of diarrheal diseases in Pakistan. Phuleli canal in Hyderabad is a main water supply source for both irrigation as well as human consumption. However, it is greatly polluted with industrial and domestic waste. This study reports the encroachments as well as sewage and solid waste disposal points along the periphery of the Phuleli River in Hyderabad city of Sindh. We report a high number of waste disposal points, and encroachments along the canal bank polluting the water. Water analysis by using standard tests also reveal high level of heavy metals and pollutants than the WHO recommended limits. We conclude that the situation may be largely improved by controlling the encroachments and disposal of solid waste and sewage into the canal.

Effect of El-Sail Drain Wastewater on Nile Tilapia (Oreochromis niloticus)from River Nile at Aswan, Egypt

This study demonstrates the impact of wastewater of El-Sail Drain on the health of Oreochromis niloticus collected from two sites of River Nile at Aswan Governorate. One of these sites is before (I) and the other is after (II) the disposal point of El-Sail drain. The physicochemical parameters of water (pH, electric conductivity, total dissolved solids, dissolved oxygen, biological and chemical oxygen demands, nitrite, nitrate and ammonia) were determined. Heavy metals (Cu, Pb, Cd and Ni) concentrations in water and fish tissues (gills, muscles, liver and gonads) were detected. The microbiological, parasitological and pathological conditions of fish were also investigated. Higher values of pH, EC, BOD and COD were detected in site II than from site I. In contrast to DO, nitrite, nitrate and ammonia which were lower in site II. Heavy metals concentrations in water of both sites, especially Ni, Pb and Cd exceeded the permissible limits and its abundance followed the order: Pb>Ni>Cd>Cu. Total bacterial count, total coliform, Salmonella sp., Shigella sp. and E. coli were detected in higher numbers in water samples from site II. Moreover, the fish caught from that site revealed higher bacterial and parasitic infection. The bioaccumulation of Ni and Pb exceeded the maximum permissible limit; however, Cu and Cd concentrations were below the permissible limit in different tissues. The bioaccumulation factor of Cu showed its highest value in liver. The histopathological lesions were more prominent in fish collected from site II. So, consuming fish caught from the studied sites around El-sail drain disposal point represents serious hazard on human health.

Confounding response of macrofauna from a confluence of impacts: brine and sewage pollution

Throughout the shores of the world, a confluence of different sources of pollution is common, e.g., through outlets releasing brine, industrial, and domestic sewage. In this study, we assessed whether a combined disposal of domestic sewage and brine altered the patterns of abundance and assemblage structure of subtidal macrofauna inhabiting sandy sea beds on the south coast of Gran Canaria (Canary Islands, NE Atlantic Ocean). Samples were collected in two surveys (May 2008 and January 2009) at three distances (0, 15, and 30 m) away from the discharge point. Macrofaunal abundances showed different patterns with varying proximity from the disposal point in the two surveys. In May 2008, lower abundances were observed at 0 m (53.89±46.82 ind.) than at 15 m (120±91.7 ind.) and 30 m (283.89±189.33 ind.) away from the disposal point. In January 2009, however, higher abundances were observed at 0 m (131.33±58.69 ind.) than at 30 m (100±24.44 ind.) and 15 m (84.78±58.39 ind.) away from the disposal point. Significant differences in macrofaunal assemblage structure were found with varying proximity from the discharge point in both surveys. The effect of proximity from the disposal point was confounded by changes in sedimentary composition between surveys, which contributed to explain differences in macrofaunal abundances and assemblage structure with varying proximity from the discharge point. As a result, confounding drivers of macrofaunal assemblage structure, here, changes in sediment composition, accounted for changes in macrofaunal abundances and assemblage structure with varying proximity from a combined disposal point of brine and sewage.

Ibuprofen adsorption in four agricultural volcanic soils

Ibuprofen (IB) is a high environmental risk drug and one of the most frequently prescribed in human medicine. Recently, IB has been detected in Gran Canaria in reclaimed water for irrigation and in groundwater. Adsorption was studied in four volcanic soils from three islands of the Canarian Archipelago. Once the biodegradation process has been excluded from the experimental conditions, a batch method was applied using initial concentrations of 1-5-10-20-50-100-200 mgL-1 and two soil/water ratios (w/V): 1:5 (OECD, 2000) and 1:1. Non-linear and linearized Langmuir and Freundlich equations were well fitted. The wide IB range tested in our batch studies allowed us to measure experimental adsorption values close to the maximum adsorption capacity (Smax) as estimated by Langmuir, making it possible thereby to validate the use of the Langmuir equation when there is a burst of contamination at high concentration. The distribution coefficient (Kd), Smax and Retardation Factor (RF) varied from 0.04 to 0.5 kgL-1, 4-200 mgkg-1 and 1.2-1.9, respectively. The lowest Smax and Kd values were found for the 1:1S/W ratio whereas most batch studies employ 1:5S/W ratios, thus obtaining higher adsorption parameters than when considering field conditions (1:1). Despite the high anion retention of andic soils, similar Kd and RF to those reported for other soils were obtained in 1:5, while high Smax was found. Our results demonstrate that IB adsorption in volcanic areas responds not only to the soil properties commonly cited in adsorption studies, but also depends on andic properties, sorbent concentration and Dissolved Organic Carbon, the higher values of which are related to the lower Kd and Smax. The low RF and low detection frequency of the IB in groundwater suggests that a) reclaimed water irrigation is not the main source of IB, and b) the existence of some uncontrolled water disposal points in the zone.

Using QFD in the Integrated Design for the Echelon Pattern of Urban Circle Solid Waste Disposal

Based o n the theory of QFD and a systematic description of the echelon pattern of urban circle solid waste disposal, a specific waterfall decomposition model for integrated design of the echelon pattern is brought forward, which is made of four houses of quality. The first house of the waterfall decomposition model- the HOQ of facilities planning for urban circle solid waste disposal is set as an example. From the angle of customer requirements, the importance of different kind of customer requirements is calculated quantitatively, using the method of Analytic Hierarchy Process. By analyzing the internal relationship of the echelon pattern, it’s concluded that the site selection of solid waste disposal points, stations and fields, and efficiency of solid waste disposal are the most important problems of the design for the echelon pattern of urban circle solid waste disposal. This work provides academic basis for the integrated design of the echelon pattern of urban circle solid waste disposal.

Environmental status and nutrients and dissolved organic carbon budget of two Saudi Arabian Red Sea coastal inlets: a snapshot statement

Two Red Sea coastal inlets situated on the Saudi Arabian western coast were visited 7 years after the implementation of a rehabilitation program including the official cessation of wastewater discharge, dredging of bottom sludge, and deployment of 28 air pumps to enhance water mixing and aeration. Visual observations indicated the presence of active sewage disposal points and apparent eutrophication. Chemical analysis of surface water supported this observation by providing measurable evidences, such as salinity lowering to about 30 and decrease of pH near the active effluents. Moreover, the extremely high concentrations of inorganic nitrogen (95 % as ammonium), phosphorus, and dissolved organic carbon are comparable to concentrations measured before the implementation of the program. Based on the apparent conservative behavior of phosphate, inorganic nitrogen, and dissolved organic carbon, concentrations of these variables at zero salinity were calculated and their budgets were estimated and compared with the measured quantities present in the surface mixed layer. The role of nitrogen and phosphorus as limiting elements was investigated using the nitrogen and phosphate ratio and the correlative plot of total inorganic nitrogen and phosphate against salinity. The pollution load, calculated using concentrations at zero salinity and nominal hydraulic flow of the effluents, amounted to 2,737 and 285 kg/day of inorganic nitrogen and phosphorus, respectively. Potential algal mass production that may result from the total assimilation of this nutrient influx is equivalent to 23–30 tons/day, which is several times higher than the direct organic matter input from the sewage effluents.

음료용 폐자동판매기에서의 HFC-134a 사용 및 폐기단계 탈루배출계수 결정에 대한 연구

Little information is available for emission pathway even if HFC-134a that is known as one of the major greenhouse gases has been broadly used in Korea. This paper attempts to clarify the emission characteristics of HFC-134a used for refrigerant of cold drinking vending machines (CDVMs) at the useand disposal-phase. We measured the residual amounts in the scrap CDVMs of 47 by applying commercial recover for refrigerant. The first-order kinetic model was introduced and the emission rate would be proportional to the remaining quantity of refrigerant. The emission factor at the use-phase was determined indirectly to be 6.9 ± 0.7 %/yr within a confidence interval of 95%, using information on residual amount and elapsed operation time at the disposal point. Correspondingly, the annual emission rate of HFC-134a per CDVM was determined to be 11.6 g. The average residual rate of HFC134a in scrap CDVMs was assessed to be 62.5 ± 2.2%, leading to a potential emission amount of 144.8 g per scrap CDVM. The chemical compositions of refrigerants from scrap passenger vehicles are quite similar to those of new refrigerants, suggesting that the refrigerants from scrap passenger vehicles could be reused. During the recovering process of refrigerant, the recovered refrigerant was contaminated by compressor lubricant that accounted for about 30% in weight. It is necessary to separate the refrigerant from the recovered material contaminated by lubricant for recycling and reuse the refrigerant.

Information and Education Campaign on Solid Waste Management and Household Practices

The study investigated the extent of information and education campaign (IEC) on solid waste management conducted by the government agencies in Butuan City and the solid waste practices among households. Descriptive design and stratified random sampling were used. Results reveal that the extent of IEC in both rural and urban villages of Butuan City was poor. Public forum or general assembly, focus group discussion, installation of tarpaulin and other signs, television ad and radio broadcast, house-to-house information campaign, and school campaign were seldom carried out. Lack of institutional support and inadequate provision of garbage disposal points and Mass Recovery Facilities (MRF) were evident. Majority of the households had their own garbage storage bin with a considerable number of them having separators for biodegradable and non-biodegradable wastes. Some opted to use plastic bags and sacks instead. Many of those in rural areas buried their biodegradable and non-biodegradable waste to the ground. A few of those in the urban areas disposed their bio-degradable wastes to the garbage station but burned those non-biodegradable waste materials. Some waste materials were sold to scrap shops for money. Keywords: Waste management, waste disposal, household waste management, solid waste management

Evaluating Truck Empty Running in Construction: A Case Study from Cape Town, South Africa

The efficiency of any transport operation isdependent on the degree to which vehiclecapacity is utilised on the forward and returntrips. Efficiency requirements create thelogistical challenges of finding backloads forreturning vehicles. In the absence ofbackloads, vehicles travel empty on the returnjourney. Construction is fundamentallydifferent from other freight services in thatapart from requiring large quantities of materialinputs, it also generates appreciable levels ofwaste. There is therefore, potential forreducing empty running by construction trucksthrough back-loading waste to points ofdisposal, reuse, recycling or reclamation.Back-loading, which is one of the reverselogistics processes is important for returningproducts that are damaged, obsolete or wornout and those unacceptable to buyers. Backloadingis also associated with utilising sparecapacity in the supply chain to increase returnon truck investment. This paper examines theoperations and processes associated withconstruction materials and waste logistics andassesses the potential for reduction in truckempty running through utilisation of thereverse logistics concept.

Level of Information and Education Campaign on Solid Waste Management and Household Practices on Solid Waste Disposal in Butuan City

This study investigates the level of Information and Education Campaign (IEC) on Solid Waste Management (SWM) conducted by the LGU and other government agencies in Butuan City. Moreover, it also considered the practices among households of Butuan City in relation to solid waste disposal. Descriptive survey design was used in this study. Using the stratified random sampling, ten (10) communities were selected with households as the main unit of analysis. From eighty-six (86) legitimate communities of Butuan City, five (5) communities were randomly selected from each of the rural and urban communities as classified by NEDA. Results revealed that, the level of IEC in both rural and urban communities of Butuan City was poor. Public forum or general assembly, focus group discussion, installation of tarpaulin and other signs, television ad and radio broadcast, house to house information campaign, and school campaign were seldom carried out. Lack of institutional support and inadequate provision of garbage disposal points and Mass Recovery Facilities (MRF) from other concerned government agencies, nongovernment organizations and HEIs were evident. It was also reported that majority of the households had their own garbage storage bin with considerable number of them having separators for biodegradable and non-biodegradable wastes. Some opted to use plastic bags and sacks instead. Many of those in rural areas buried their biodegradable and non-biodegradable waste on the ground.

Water chemistry and nutrient release during the resuspension of FeS-rich sediments in a eutrophic estuarine system

The objective of this study was to investigate the impact of resuspending FeS-rich benthic sediment on estuarine water chemistry. To address this objective, we conducted (1) a series of laboratory-based sediment resuspension experiments and (2) also monitored changes in surface water composition during field-based sediment resuspension events that were caused by dredging activities in the Peel–Harvey Estuary, Western Australia. Our laboratory resuspension experiments showed that the resuspension of FeS-rich sediments rapidly deoxygenated estuarine water. In contrast, dredging activities in the field did not noticeably lower O2 concentrations in adjacent surface water. Additionally, while FeS oxidation in the laboratory resuspensions caused measurable decreases in pH, the field pH was unaffected by the dredging event and dissolved trace metal concentrations remained very low throughout the monitoring period. Dissolved ammonium (NH4+) and inorganic phosphorus (PO4–P) were released into the water column during the resuspension of sediments in both the field and laboratory. Following its initial release, PO4–P was rapidly removed from solution in the laboratory-based (<1h) and field-based (<100m from sediment disposal point) investigations. In comparison to PO4–P, NH4+ release was observed to be more prolonged over the 2-week period of the laboratory resuspension experiments. However, our field-based observations revealed that elevated NH4+ concentrations were localised to <100m from the sediment disposal point. This study demonstrates that alongside the emphasis on acidification, deoxygenation and metal release during FeS resuspension, it is important to consider the possibility of nutrient release from disturbed sediments in eutrophic estuaries.