Geochemical fractions and modeling adsorption of heavy metals into contaminated river sediments in Japan and Thailand determined by sequential leaching technique using ICP-MS

Wijaya, Anugrah Ricky; Ohde, Shigeru; Shinjo, Ryuichi; Ganmanee, Monthon; Cohen, Michael D.

doi:10.1016/j.arabjc.2016.10.015

Cited by 29 publications

(11 citation statements)

References 21 publications

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“…The K F and n values in the Freundlich equation for samples supplemented with external HS suggest that HS interaction with clay plays the main role in Cd adsorption and therefore the higher K F , considering that MO sediment shows Fe concentration five times higher than in that of RB but a clay percentage almost 50% lower. Wijaya et al (2016) suggested that Cd solubility aids Cd adsorption onto HS as organic particulate in sediment and confirmed that the adsorption capacity of the sediment is increased by organic matter contents. Our results support this conclusion when considering that the sediment with higher organic carbon percentage (RB) seems to magnify the effects of adding HS, in terms of K F values.…”

Section: Sandmentioning

confidence: 63%

Dissolved humic substances supplied as potential enhancers of Cu, Cd, and Pb adsorption by two different mangrove sediments

et al. 2018

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Purpose The external supply of humic substances has been recently suggested for the remediation of metal-polluted sediments; however, little is known about how to supply them and their effects on metal mobility. The study sought to investigate the sediment-metals-humic substance interaction in mangrove forest sediments. We aimed to evaluate the sediment adsorption potential in the case of large and rapid metal loads, as recently occurred in the Doce River (Brazil). Materials and methods In each mangrove forest sampling point of the Benevente River (RB) and Vitoria bay (MO), sediments were collected randomly along the river banks at a depth of 0-10 cm. Samples were characterized in terms of pH, CEC, organic carbon, texture, specific surface area, and elemental composition. The heavy metal content was measured by mass absorption spectrophotometry. Humic substances were extracted from the sediments according to the International Humic Substances Society (IHSS) method, avoiding separation of fulvic and humic acids. Original sediments were supplemented with humic substances and six Cu, Cd, or Pb concentrations. Freundlich and Langmuir equations were employed to create adsorption isotherms. Results and discussion The two sediments are significantly different, specifically with regard to organic carbon and Fe content, texture, and specific surface area. External humic substances increased the Cu adsorption capacity in both sediments but without an important change in Cu adsorption dynamics. Humic substances slightly increased the sediment adsorption capacity of Pb in RB sediment while they decreased in MO sediment, characterized by lower specific surface area, probably due to coverage of the active adsorption sites. Cd isotherms showed that the different characteristics of sediments alone do not affect Cd adsorption, but coupled with humic substances; Cd affinity for the soil surface increased five times in RB sediments confirming sediment-metalhumic substance interactions. Conclusions Humic substances affect soil metal retention mainly by altering the ion affinity for sediment surface, leading to contrasting results. The Fe concentration could be important depending on specific surface area and humic substance percentage, due to its capacity to form spheroids linked to molecules of humic substances on the clay surface. Several works have been carried out on this research area, but due to the many variables and different metal ions, we recommend further studies.

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Section: Sandmentioning

confidence: 63%

Dissolved humic substances supplied as potential enhancers of Cu, Cd, and Pb adsorption by two different mangrove sediments

et al. 2018

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“…Finally, the fine-grained fraction samples were also kept enclosed in a clean plastic bag to prevent contamination. We used the total leaching metal contents for these samples using microwave digestion, 6 as follows: 10.0-11.0 mg of dry sediment, grouper fish, moss, seaweed, soil, and sharp grass samples were leached with 1 mL of HNO 3 (15.3 M) in 7 mL vials, subjected to continuous shaking for 24 h, put in a sonic bath for 30 min and centrifuged for 10 min, respectively. The supernatant solution was then put in a sonic bath for 30 min and then centrifuged at 100 rpm for 10 min.…”

Section: Sample Collection and Pretreatment For Analysismentioning

confidence: 99%

“…Some researchers investigated the metal contents, stable isotopes and their geochemical fractions of sediment in the river adjacent sea for monitoring seawater pollution. [1][2][3][4][5][6] The status of seawater can be monitored using their level of metal contents in water, sediment, seaweed, coral reefs and then identified to investigate their source of metal contents using stable isotopes analysis, such as δ 11 B, δ 18 O, δ 13 C, δ 15 N and Pb isotope ratios ( 208 Pb / 206 Pb vs. 207 Pb / 206 Pb). The contaminant of [F -] in seawater is reflected by the F / Ca in non-symbiotic corals (Flabellum sp.).…”

Section: Introductionmentioning

confidence: 99%

Metal Contents and Pb Isotopes in the Surface Seawater of the Gulf of Prigi, Indonesia: Detection of Anthropogenic and Natural Sources

Wijaya¹,

Semedi²,

Lusiana³

et al. 2018

J. Braz. Chem. Soc.

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In order to investigate the anthropogenic and natural sources of metals in the Gulf of Prigi, Indonesia, it was analyzed their metal contents and Pb isotopes of surface seawater together with sediment, grouper fish, mosh, seaweed, soil, and sharp grass for protecting the environmental pollution of the study area. Samples were leached using a microwave digestion technique. Metal (Ca, Fe, Mn, Cu and Pb) concentrations and 206 Pb, 207 Pb and 208 Pb in the leached solutions were analyzed using inductively coupled plasma-mass spectrometry (ICP-MS). The level concentrations of Ca (491436 μg kg-1), Fe (12123 μg kg-1), Mn (37.2 μg kg-1), Cu (84.0 μg kg-1) and Pb (34.5 μg kg-1) in the surface seawater were low compared with those of background seawater levels issued by World Health Organization (WHO). The range of Pb isotope ratios (207 Pb / 206 Pb = 0.7966-0.9945 and 208 Pb / 206 Pb = 2.2600-2.8243) in surface seawater was higher in the plotted Pb growth curve suggesting unpolluted Pb reflected by natural sources such as mineral sources or lithogenic from marine sediment.

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“…Recently, industrial activities and urbanization in estuary regions have led to an increased pollution, especially with heavy metals, which can impact the ecosystem due to their toxicity and adsorptive behaviors (Jain, 2001;Zhang et al, 2012;Costa-Böddeker et al, 2017). This includes physical and chemical processes such as the adsorption on sediments, the precipitation with ferrous and manganese oxides, with carbonate and the adsorption by organic matters or by covalent bonds in minerals (Wijaya et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cu2+ and Pb2+ spiked sediment for sediment toxicity tests: a case study from Soai Rap estuary in Sai Gon - Dong Nai river system

et al. 2019

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Heavy metals contamination in river sediment is becoming more severe, as is also the case in Soai Rap estuary, Vietnam, where Cu and Pb polution is significant. The evironmental risks posed by heavy metals are usually assessed by toxicity tests using sediment spiked with contaminants in different concentrations. In order to recreate natural conditions, the preparation of sediment samples spiked with heave metals must be carried out following strict procedures. The objective of the study is therefore to determine the adsorption kinetic and equilibrium parameters of two heavy metals (Cu2+ and Pb2+) on surface sediment collected from an intertidal mudflat in the Soai Rap estuary of Vietnam. The experiments were conducted with a liquid (Cu2+ and Pb2+ solutions) to solid (sediment) ratio of approximately 1:10. Elutriates were prepared by shaking the spiked sediment sample in artificial seawater at a ratio of 1:4 (wet sediment/water). The Cu2+ solution reached equilibrium after about 12 hours and the maximum adsorption capacity of 0.86 mg/g while the Pb2+ solution reached equilibrium after 10 hours, with the maximum adsorption capacity of 35.2 mg/g. The regression analysisof experimental data of Cu2+ and Pb2+ adsorption on sediment has shown good consistency with both Langmuir and Freundlich models, whereas the Langmuir model was found to be more appropriate. The adsorption kinetic of both heavy metals was well described by the pseudo second-order adsorption kinetic model and the desorption processes were characterised using the Langmuir and Freundlich models (both models were suitable for Cu2+ desorption but only Freundlich for Pb2+). Using the present methodology, the concentrations of heavy metals spiked on sediment could be calculated, however the maximum adsorption capacity for both substances was not yet achieved. Further findings include the determination of the equilibrium time for adsorption, very relevant when spiking sediments for toxicity tests to evaluate the environmental risks of polution with heavy metals in the Soai Rap estuary, Vietnam. Ô nhiễm kim loại nặng trong trầm tích cửa sông ngày càng trầm trọng, như trường hợp ở cửa sông Soài Rạp, Việt Nam, nơi mà ô nhiễm Cu, Pb là đáng kể. Rủi ro môi trường do kim loại nặng gây ra thường được đánh giá bằng các thử nghiệm độc tính sử dụng trầm tích kết hợp với các chất gây ô nhiễm ở các nồng độ khác nhau. Để tái tạo các điều kiện tự nhiên, việc chuẩn bị các mẫu trầm tích kết hợp với kim loại nặng phải được thực hiện theo những quy trình nghiêm ngặt. Do đó, mục tiêu của nghiên cứu là xác định các thông số động học và cân bằng hấp phụ của hai kim loại nặng (Cu2+ và Pb2+) lên trầm tích mặt được thu thập từ một bãi bồi tại cửa sông Soài Rạp, Việt Nam. Các thí nghiệm được thực hiện với tỷ lệ chất lỏng (dung dịch Cu2+ và Pb2+) và chất rắn (trầm tích) xấp xỉ 1:10. Dung dịch rửa giải được chuẩn bị bằng cách lắc mẫu trầm tích đã kết hợp trong nước biển nhân tạo theo tỷ lệ 1: 4 (trầm tích ướt/nước). Dung dịch Cu2+ đạt trạng thái cân bằng sau khoảng 12 giờ và dung lượng hấp phụ tối đa 0,86 mg/g trong khi dung dịch Pb2+ đạt trạng thái cân bằng sau 10 giờ, với dung lượng hấp phụ tối đa 35,2 mg/g. Phân tích hồi quy dữ liệu thực nghiệm của quá trình hấp phụ Cu2+ và Pb2+ lên trầm tích đã cho thấy phù hợp với cả hai mô hình Langmuir và Freundlich, nhưng mô hình Langmuir được tìm thấy là phù hợp hơn. Động học hấp phụ của cả hai kim loại nặng được mô tả là phù hợp với mô hình động học hấp phụ bậc hai giả và các quá trình giải hấp được đặc trưng bằng mô hình Langmuir và Freundlich (cả hai mô hình đều phù hợp với giải hấp Cu2+ nhưng chỉ Freundlich cho Pb2+). Sử dụng phương pháp hiện tại, nồng độ kim loại nặng kết hợp lên trầm tích có thể được tính toán, tuy nhiên khả năng hấp phụ tối đa của cả hai chất vẫn chưa đạt được. Hơn nữa, việc xác định thời gian cân bằng cho hấp phụ, rất phù hợp khi sử dụng trầm tích kết hợp cho thử nghiệm độc tính để đánh giá rủi ro môi trường ô nhiễm kim loại nặng ở cửa sông Soài Rạp, Việt Nam.

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Geochemical fractions and modeling adsorption of heavy metals into contaminated river sediments in Japan and Thailand determined by sequential leaching technique using ICP-MS

Cited by 29 publications

References 21 publications

Dissolved humic substances supplied as potential enhancers of Cu, Cd, and Pb adsorption by two different mangrove sediments

Dissolved humic substances supplied as potential enhancers of Cu, Cd, and Pb adsorption by two different mangrove sediments

Metal Contents and Pb Isotopes in the Surface Seawater of the Gulf of Prigi, Indonesia: Detection of Anthropogenic and Natural Sources

Preparation of Cu2+ and Pb2+ spiked sediment for sediment toxicity tests: a case study from Soai Rap estuary in Sai Gon - Dong Nai river system

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