The Research of Petroleum Contaminated Site Media for Adsorption of Petroleum Pollutant

2011 ◽  
Vol 393-395 ◽  
pp. 1038-1041
Author(s):  
Wei Wang ◽  
Xiao Si Su
Keyword(s):  
Adsorption Equilibrium ◽  
Fine Sand ◽  
Contaminated Site ◽  
Hydrogeological Condition ◽  
Adsorption Experiment ◽  
Isothermal Adsorption ◽  
Equilibrium Time ◽  
Sandy Silt ◽  
Soil Media ◽  
Petroleum Pollutant

Base on the geological, hydrogeological condition survey of petroleum contaminated site, we choose benzene, dichloromethane, chloroform as target pollutants, and research the adsorption characteristics of target pollutant on the site soil media. Mainly design adsorption kinetics experiment and isothermal adsorption experiment of target pollutant on sandy silt, silt and fine sand. The result of the experiments show that the finer media the adsorption equilibrium time is shorter, the equilibrium time is sandy silt chloroform >dichloromethane, Migration is dichloromethane > chloroform > benzene. To same pollutant, the maximum adsorption of target pollutant is sandy silt >silt >fine sand.

Natural Attenuation of Diesel Pollution in Sand Layer of Vadose Zone

2011 ◽  
Vol 179-180 ◽  
pp. 174-178
Author(s):  
Bing Wang ◽  
Yong Sheng Zhao ◽  
Zhi Hui Qu
Keyword(s):  
Vadose Zone ◽  
Natural Attenuation ◽  
Adsorption Equilibrium ◽  
Life Time ◽  
Fine Sand ◽  
Diesel Oil ◽  
Total Petroleum Hydrocarbon ◽  
Sand Layer ◽  
Adsorption Experiment ◽  
First Order

The natural attenuation process was studied by vadose zone simulating indoor to quantify the adsorption, biodegradation and volatilization of diesel oil. Through adsorption experiment, adsorption equilibrium time of diesel sewage by fine sand was 24 h, and maximum theoretical adsorbance to Total Petroleum Hydrocarbon (TPH) was calculated to 234 mg/kg. Through the contrasts of three columns, the first-order attenuation kinetics equations of biodegradation and volatilization in the diesel polluted sand layer of vadose zone and the half-life time were established. According to the experiments, absorption, biodegradation and volatilization all played important roles, they were very major roles in natural attenuation.

Phytic Acid Sepiolite Compound Adsorbent on the Adsorption of Cd2+ Performance Research of Heavy Metals

2014 ◽  
Vol 707 ◽  
pp. 199-201
Author(s):  
Jiao Sheng ◽  
Shu Mei Yan ◽  
Xian Feng ◽  
Gui Hua Zeng
Keyword(s):  
Heavy Metals ◽  
Phytic Acid ◽  
Adsorption Equilibrium ◽  
Equilibrium Time ◽  
Adsorbent Dosage ◽  
Adsorption Performance ◽  
Heavy Metals Adsorption ◽  
Performance Research ◽  
Compound Adsorbent ◽  
Acid Compound

This paper studies the preparation of phytic acid with sepiolite compound phytic acid compound sepiolite adsorbent of heavy metals adsorption performance is good, and the adsorption of the optimum adsorption conditions was studied, the optimum adsorption conditions for adsorbent dosage 30 g/L, temperature 40°C, pH = 3, the adsorption equilibrium time 30 min, Cd6+, concentration is lower than 50 mg/L.

scholarly journals KANDUNGAN MINERAL PADA SEDIMEN PANTAI DAN LAUT, HUBUNGANNYA DENGAN BATUAN SUMBER DI PESISIR KABUPATEN REMBANG, JAWA TENGAH

2016 ◽  
Vol 9 (3) ◽  
pp. 135
Author(s):  
Deny Setiady ◽  
Ediar Usman
Keyword(s):  
Coastal Zone ◽  
High Resistance ◽  
Mineral Content ◽  
Fine Sand ◽  
Water Area ◽  
Coastal Sediment ◽  
Medium Sand ◽  
Surficial Sediments ◽  
Sandy Silt

Sedimen di sepanjang pantai Kabupaten Rembang terdiri atas sedimen muda (aluvial) dan sedimen tua (breksi dan batugamping). Sedimen muda merupakan sedimen lepas dan terdapat di daerah sedimentasi. Sedimen tua berupa sedimen kompak yang secara fisik mempunyai resisitensi tinggi terhadap abrasi Batuan yang terdapat di kawasan pesisir adalah: pasir kuarsa, andesit, tras kaolin, batugamping, batubara dan lempung. Peta sebaran sedimen dasar laut perairan Kabupaten Rembang, menunjukkan dominasi endapan pasir, lanau (pasir halus) dan lanau pasiran (pasir halus - kasar). Kandungan mineral yang terdapat di perairan Kabupaten Rembang terdiri dari: magnetit, pirit, hematit, zirkon, ilmenit diopsid, augit, hornblende, kuarsa, biotit, muskovit dan dolomit Kata Kunci: sedimen, mineral, Rembang The coastal sediment along the coastal of Rembang District consists of young sediment (alluvium) and old sediment (breccias and limestones). Young sediment is placer sediment that occupies the sedimentation area. Old sediment is massive sediment that has a high resistance to abrasion Rocks content in the coastal zone area consist of quarzt sand, andesite, caoline, limestone, trass, coal and clay. Seafloor surficial sediments map of the Rembang water area shows the domination of sand deposits, silt (fine sand) and sandy silt (fine to medium sand). Mineral content in Rembang waters area consists of magnetites, pyrites, hematites, zircons, ilmenite diopsides, augitse, hornblendas, quartzs, biotitse, muskovites and dolomites. Keywords: sediment, mineral, Rembang

In situ Biorestoration of an Oil Contaminated Subsoil

1988 ◽  
Vol 20 (3) ◽  
pp. 255-256 ◽  
Author(s):  
R. van den Berg ◽  
J H. A. M. Verheul ◽  
D. H. Eikelboom
Keyword(s):  
Microbial Activity ◽  
Contaminated Soil ◽  
Degradation Rate ◽  
Fine Sand ◽  
Contaminated Site ◽  
Literature Study ◽  
Limited Mobility ◽  
Gasoline Station ◽  
Oil Components

The feasibility of in-situ biorestoration of contaminated subsoils is being investigated by RIVM in co-operation with TNO. This project is aimed at optimizing the treatment of deeper layers of contaminated soil by enhancing microbial activity. The project consists of a literature study, research at laboratory-scale, detailed research of the selected experimental site and the actual clean-up of the contaminated site. In the literature study it was concluded that in-situ biological treatment offers reasonable prospects, concerning the technical aspects and the final results, but there were still questions about the efficiency of the clean-up of the soil itself. The selected site is a gasoline station, where the soil has been contaminated with gasoline, caused by a leaking tank. At least 30 m of normal gasoline have leaked and about 600 m3 of soil have been contaminated. Several monitoring wells have been placed to get an impression of the quantity and composition of the contamination. The soil consists of medium fine sand, without organic material and contains some clay-loam layers. The groundwater level is at about 2.5 m below the surface. Concentrations of the oil components in the soil(mainly between 1,000 and 5,000 mg/kg) as well as in the groundwater exceed the Dutch reference values which demand treatment of the site. In leaching experiments it was found that only very small quantities of the gasoline can be leached from the soil. Clean-up by percolation only would take at least 4 years. The leached quantity increased with the percolation rate, but was nearly independent of the gasoline concentration. The mobility could not be promoted by the addition of detergents. Numerous laboratory biodegradation experiments have been carried out in order to determine the degradation capacity of the contaminated soil, and to determine to what extent this biodegradation could be stimulated. The conlusions of these experiments are:In the soil there is low microbial activity and also the rate of degradation of the oil is low and constant in time. From mass balance studies it was determined that the degradation rate is determined by the availability of the oil components, which is a function of the dissoiution rate into the water and the volatilization. Availability turns out to be one of the determining aspects for this type of restoration technique.The degradation activity is most enhanced by the addition of seeding material from a landfarm, but is practically not feasible because of the limited mobility of microorganisms in soil.The presence of water and buffering at a neutral pH contribute to an optimal biodegradation rate.Some N and P additions are necessary. However, the C-N-P ratio had a very small influence on the degradation. A C-N-P ratio of 100-10-10 is recommended.As alternative oxygen source, hydrogen peroxide seems suitable, but the use of high concentrations of nitrate led to a decreased degradation.Detergents applied to increase the availability of the oil components did not stimulate the degradation. The degradation rate under stimulated conditions varied between 5 and 40 (mean 10) mg C/kg/day in comparison with an autonomous degradation rate of 3-4 mg C/kg/day. A stimulated clean-up duration of 1.5 years is expected. Column experiments are in progress now and are used to confirm the findings of the laboratory tests. They should also give answers about oxygen limitation and alternative oxygen sources. First examples of the hydrological set-up (infiltration by drains and withdrawal by wells, dimensioned by the desired degradation rate) confirm the feasibility of this project. It is expected that the actual clean-up operation will start in the fall of this year. In-situ treatment offers a very good alternative with advantages over excavation combined with various treatment techniques.

scholarly journals Effects of Dissolved Organic Matter on Sorption of Oxytetracycline to Sediments

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Zongzhou Wang ◽  
Qianli Jiang ◽  
Runze Wang ◽  
Xiaoyu Yuan ◽  
Shengke Yang ◽  
...  
Keyword(s):  
Adsorption Equilibrium ◽  
Sorption Kinetics ◽  
Chicken Manure ◽  
Isotherm Models ◽  
Sorption Characteristic ◽  
River Floodplain ◽  
Equilibrium Time ◽  
Dissolved Organic Matters ◽  
Weihe River ◽  
Adsorption Amount

The effects of two representative dissolved organic matters (DOMs) (derived from corrupt plants (PDOM) and chicken manure (MDOM)) on sorption characteristic of oxytetracycline to three typical sediments (first terrace (FT), river floodplain (RF), and riverbed (RB) sediments collected from the Weihe River) were investigated. Results showed that both DOMs can make the adsorption equilibrium time advance about 6 hours. The presence of DOMs changed the sorption kinetics model and the spontaneous degree of the reaction but did not change the sorption isotherm models. The adsorption of oxytetracycline (OTC) could be promoted by adding PDOM, and its maximum adsorption amount increased by 23.8% for FT, 38.0% for RB, and 28.3% for RF, respectively, whereas MDOM could inhibit the adsorption and maximum adsorption amount decreased by 23.3% for FT, 11.6% for RB, and 16.1% for RF, respectively. In addition, the DOM concentration also affected the adsorption. Overall, this study suggests that the humus-like DOM can promote the adsorption of OTC while the protein-like DOM can inhibit the adsorption of OTC to sediments, which is determined by the aromaticity, hydrophilicity, and polarity of the DOMs.

Kinetic Equilibrium and Adsorption Thermodynamics of Direct Dyes by Ca/CTS/FA Composite

2018 ◽  
Vol 913 ◽  
pp. 941-947
Author(s):  
Bei Gang Li ◽  
Li Wei Sun
Keyword(s):  
Fly Ash ◽  
Adsorption Equilibrium ◽  
Adsorption Thermodynamics ◽  
Direct Dyes ◽  
Isothermal Adsorption ◽  
Composite Adsorbent ◽  
Adsorption Processes ◽  
Different Temperatures ◽  
Ft Ir ◽  
Adsorption Rates

A novel composite material, calcium/chitosan/fly ash (Ca/CTS/FA) adsorbent prepared by adding a small amount of chitosan (CTS) and calcium ion(Ca) on fly ash (FA) was applied to the adsorption of three direct dyes including direct orange S (DO-S), direct green BE (DG-BE) and direct bordeaux BE (DB-BE). Adsorption equilibrium, isotherms and adsorption thermodynamics were studied . The results show that the adsorption rates of three direct dyes to Ca/CTS/FA are high and the adsorption equilibrium can be reached within 60 minutes. isothermal adsorption data agree with Langmuir model, and the saturated adsorption capacities are 1667mg/g for DO-S, 1111mg/g for DG-BE and 1111mg/g for DB-BE respectively at 298K. Dubinin-Radushkevich (D-R) model is used to investigate the adsorption behavior of direct dyes, and theaverage adsorption energy is in the range of 17.2 ~ 23.6kJ/mol at different temperatures. the thermodynamic parameters indicate that the adsorption processes of direct dyes to Ca/CTS/FA are spontaneous and endothermic from 298K to 328K. Characterization results by FT-IR indicate that Ca/CTS/FA composite is successfully prepared. As a low-value composite adsorbent, Ca/CTS/FA has very high adsorption capacity for direct dyes.

Modified Clay Adsorbent for the Adsorption of Cd2+ Research

2014 ◽  
Vol 707 ◽  
pp. 195-198
Author(s):  
Jiao Sheng ◽  
Shu Mei Yan ◽  
Xian Feng ◽  
Ai Cui He ◽  
Gui Hua Zeng
Keyword(s):  
Wastewater Treatment ◽  
Rice Bran ◽  
Mass Concentration ◽  
Adsorption Equilibrium ◽  
Microbial Fermentation ◽  
Adsorption Effect ◽  
Equilibrium Time ◽  
Adsorbent Dosage ◽  
Modified Clay ◽  
Adsorption Performance

The modified clay have excellent adsorption performance. This paper discussed the adsorbent dosage, pH, temperature, adsorption equilibrium time and so on the influence of factors on the adsorbent adsorption performance, the results show that the microbial fermentation of rice bran to Cd2+ has good adsorption effect. The best adsorption conditions for: dosage of microbial fermentation of rice bran 18 g/L, temperature 30 °C, pH = 3.8, Cd2 + mass concentration is lower than 50 mg/L, the adsorption equilibrium time 30 min, adsorption rate can reach 93.5%, and its application foreground is prospected in wastewater treatment.

scholarly journals PENJERAPAN LOGAM KADMIUM (Cd2+) DENGAN ADSORBEN CANGKANG TELUR BEBEK YANG TELAH DIAKTIVASI

2013 ◽  
Vol 2 (3) ◽  
pp. 29-32
Author(s):  
Krisnawati ◽  
Jasinda ◽  
Iriany
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Adsorption Isotherm ◽  
Adsorption Kinetics ◽  
Adsorption Equilibrium ◽  
Adsorption Kinetic ◽  
Equilibrium Time ◽  
First Order ◽  
As Adsorption ◽  
Cadmium Adsorption

Harzadous waste water is the waste that can be harmful to human’s health. One of heavy metals that contains in harzadous waste is cadmium. This research aims to investigate the characteristic of cadmium adsorption, equilibrium time, percentage adsorption, adsorption kinetic, adsorption isotherm and capacity of cadmium adsorption by using duck egg’s shell adsorbent. Duck egg’s shell adsorbent that had been activated at 600 oC were put into cadmium solution and mixed together. Every 10 minutes experimental samples were analyzed using AAS. The results indicated that percentage adsorption increases and the longer equilibrium time will be reached with an increase of adsorbent dosage. The Lagergen first order Models was applied as adsorption kinetics model and the Bangham Models was applied as adsorption isotherms models.

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