Pub Date : 2015-10-09DOI: 10.2174/1874123101509010113
Song Fengmin, Xingchang Zhang, Wang Yanmin, Chen Li
Heavy metal pollution was a dynamic changing process for a long period and on large spatial scale. The heavy metal content in tailing soil varied with time changing. The distribution and cumulative characteristics of heavy metals in different time and surrounding soil caused by ore dressing and smelting activities were different. The aim of this study was to assess the geochemical characteristics and pollution status of heavy metals in soil around 2 iron tailing areas at different using status. Samples were collected around the 2 different iron tailing and sieved through nylon sieves. Metals were measured in digested solutions by a atomic emission spectrometer. The concentration of all heavy metals (Fe, Mn, V, Cu, Ni) in the soil around using M tailing area exceeded local soil background value; however, the content of all metals except Fe in soil around closed W tailing areas were lower than background value. BCR results showed that average exchangeable fraction of Mn in soil around W and M accounted for 11.87%, 11.78% of the total concentration, respectively; average exchangeable and reducible fractions of Ni accounted for 26.97% and 13.59%, respectively; average oxidizable fraction of Cu accounted for 18.6%, 31.63% in soil around W and M, respectively, which were higher than other metals; residual fraction of Fe, V accounted for more than 80% of the total concentration. The results indicate the soil was moderately contaminated by heavy metal around M and unpolluted around W. However, the risk assessment results performed that Mn showed moderate potential ecological risk and other metals showed low potential risk.
{"title":"Soil Heavy Metal Pollution Around Iron Tailing Areas at Different UsingStatus","authors":"Song Fengmin, Xingchang Zhang, Wang Yanmin, Chen Li","doi":"10.2174/1874123101509010113","DOIUrl":"https://doi.org/10.2174/1874123101509010113","url":null,"abstract":"Heavy metal pollution was a dynamic changing process for a long period and on large spatial scale. The heavy metal content in tailing soil varied with time changing. The distribution and cumulative characteristics of heavy metals in different time and surrounding soil caused by ore dressing and smelting activities were different. The aim of this study was to assess the geochemical characteristics and pollution status of heavy metals in soil around 2 iron tailing areas at different using status. Samples were collected around the 2 different iron tailing and sieved through nylon sieves. Metals were measured in digested solutions by a atomic emission spectrometer. The concentration of all heavy metals (Fe, Mn, V, Cu, Ni) in the soil around using M tailing area exceeded local soil background value; however, the content of all metals except Fe in soil around closed W tailing areas were lower than background value. BCR results showed that average exchangeable fraction of Mn in soil around W and M accounted for 11.87%, 11.78% of the total concentration, respectively; average exchangeable and reducible fractions of Ni accounted for 26.97% and 13.59%, respectively; average oxidizable fraction of Cu accounted for 18.6%, 31.63% in soil around W and M, respectively, which were higher than other metals; residual fraction of Fe, V accounted for more than 80% of the total concentration. The results indicate the soil was moderately contaminated by heavy metal around M and unpolluted around W. However, the risk assessment results performed that Mn showed moderate potential ecological risk and other metals showed low potential risk.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"224 1","pages":"113-120"},"PeriodicalIF":0.0,"publicationDate":"2015-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80055347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-10-09DOI: 10.2174/1874123101509010121
Qilin Liu
Nowadays global water quality pollution has become extremely serious, and solving water pollution has been extremely urgent, so researches on water pollution solutions have become even urgent. And flocculating method is the most traditional water purification method, research and create new high performance flocculating agent is one of floccu- lating method inherent problems. The paper mainly describes adding iron, zinc two kinds of metal captions together in polysyllabic acid, well controlling all aspects requirements in technology, researching and creating new water purification substance—poly iron and zinc silicate sulfate flocculants (PFZSS). PFZSS making method is weighting proper amount sodium silicate into container, and meanwhile putting it into water to dissolve, then utilizing dilute euphoric acid and so- dium hydroxide to adjust silicic acid solution pH value and arrive at regulated scope, letting it to activate and arrive at cer- tain time, slowly importing activated proper silica acid solution into moderate iron sulfate and zinc sulfate on the condi- tion of fully blending, and finally putting and curing for a while. And implement experiment research on how mixed solu- tion metal cations matching; making method, pH value, and silicon dioxide concentration these factors affect PFZSS overall performance. PFZSS application mainly takes catering industry sewage solution as an example to get PFZSS has very strong absorption capacity, owns good cleaning effects on extremely turbid catering industry treatment sewage COD and turbidity acquiring, its reaction formed flock density is great, sedimentation rate is very fast, so PFZSS will have great application prospects in the aspect of treating urban sewage.
{"title":"New Water Treatment Chemical PFZSS Preparation and Application","authors":"Qilin Liu","doi":"10.2174/1874123101509010121","DOIUrl":"https://doi.org/10.2174/1874123101509010121","url":null,"abstract":"Nowadays global water quality pollution has become extremely serious, and solving water pollution has been extremely urgent, so researches on water pollution solutions have become even urgent. And flocculating method is the most traditional water purification method, research and create new high performance flocculating agent is one of floccu- lating method inherent problems. The paper mainly describes adding iron, zinc two kinds of metal captions together in polysyllabic acid, well controlling all aspects requirements in technology, researching and creating new water purification substance—poly iron and zinc silicate sulfate flocculants (PFZSS). PFZSS making method is weighting proper amount sodium silicate into container, and meanwhile putting it into water to dissolve, then utilizing dilute euphoric acid and so- dium hydroxide to adjust silicic acid solution pH value and arrive at regulated scope, letting it to activate and arrive at cer- tain time, slowly importing activated proper silica acid solution into moderate iron sulfate and zinc sulfate on the condi- tion of fully blending, and finally putting and curing for a while. And implement experiment research on how mixed solu- tion metal cations matching; making method, pH value, and silicon dioxide concentration these factors affect PFZSS overall performance. PFZSS application mainly takes catering industry sewage solution as an example to get PFZSS has very strong absorption capacity, owns good cleaning effects on extremely turbid catering industry treatment sewage COD and turbidity acquiring, its reaction formed flock density is great, sedimentation rate is very fast, so PFZSS will have great application prospects in the aspect of treating urban sewage.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"93 1","pages":"121-124"},"PeriodicalIF":0.0,"publicationDate":"2015-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73409290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-09-30DOI: 10.2174/1874123101509010103
Xiaowen Hao, Zhijun Zhang, Ran Liu
Chemical agglomeration can reduce the particulates (including PM2.5) concentration emitted from fly ash par- ticulates and the wet flue gas desulfurization (WFGD) system. However, the calcium-based slurries affect the regulation of agglomeration compare to water, in particular, the wettability of the particulates and the viscosity of the calcium-based slurry. The wettability and the viscosity are of the important factors affecting agglomeration, conversely. This manuscript studied the two factors in the calcium-based slurries. The sessile drop method was used to measure the contact angle. Four kinds of calcium-based slurries (CaCO3, CaSO3, CaSO4, Ca(OH)2) respectively mixed with five kinds of wetting agents wet particles, and the wetting regulation was studied. The viscometer was used to measure the viscosity of the calcium- based slurry with the wetting agents, and the variation of the viscosity was analysed as well. The results showed that the smaller the particle size was, the more difficult to be wet, and the wetting agents could enhance the wettability greatly, but the effect was related to the properties of the calcium-based material and the wetting agents. There were variable viscosi- ties for different calcium-based slurries after adding the wetting agents. Overall, the Compound No. 3 had the optimal qualities in improving particle wettability and maintaining the calcium-based slurry with a high viscosity. Thereby the Compound No. 3 is optimal in facilitating chemical agglomeration.
{"title":"Study on Particles Wetted by the Calcium-Based Slurries and the SlurriesViscosity with the Wetting Agents","authors":"Xiaowen Hao, Zhijun Zhang, Ran Liu","doi":"10.2174/1874123101509010103","DOIUrl":"https://doi.org/10.2174/1874123101509010103","url":null,"abstract":"Chemical agglomeration can reduce the particulates (including PM2.5) concentration emitted from fly ash par- ticulates and the wet flue gas desulfurization (WFGD) system. However, the calcium-based slurries affect the regulation of agglomeration compare to water, in particular, the wettability of the particulates and the viscosity of the calcium-based slurry. The wettability and the viscosity are of the important factors affecting agglomeration, conversely. This manuscript studied the two factors in the calcium-based slurries. The sessile drop method was used to measure the contact angle. Four kinds of calcium-based slurries (CaCO3, CaSO3, CaSO4, Ca(OH)2) respectively mixed with five kinds of wetting agents wet particles, and the wetting regulation was studied. The viscometer was used to measure the viscosity of the calcium- based slurry with the wetting agents, and the variation of the viscosity was analysed as well. The results showed that the smaller the particle size was, the more difficult to be wet, and the wetting agents could enhance the wettability greatly, but the effect was related to the properties of the calcium-based material and the wetting agents. There were variable viscosi- ties for different calcium-based slurries after adding the wetting agents. Overall, the Compound No. 3 had the optimal qualities in improving particle wettability and maintaining the calcium-based slurry with a high viscosity. Thereby the Compound No. 3 is optimal in facilitating chemical agglomeration.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"20 1","pages":"103-108"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85586387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-09-10DOI: 10.2174/1874123101509010098
Huiyan Gao, Lu-Hua Yang
Field experiment was carried out to study on the spatial and temporal distribution of soil nitrate nitrogen at Ranzhuang water resources experiment station in Hebei piedmont plain from 2011 to 2012. The results show that nitrate nitrogen content varies in sinusoidal curve at shallow tilth soil and shows in "W" shape at deep soil profile during the wheat-maize rotation period. Nitrate nitrogen is mainly accumulated in 0~100cm soil and the maximum value occur at reviving stage in the wheat growth period. In the maize growth period, the distribution of nitrate nitrogen is double peak curve in 0~500cm soil profile. The maximum peak emerges at 150~260cm, the peak of soil nitrate content is between 36.7~106.36mg/kg. In 0~500cm soil layers, the cumulative amount of nitrate nitrogen is 1430.56~5126.05 kg/hm 2 . The amount of nitrate nitrogen leaching is 1294.13kg/hm 2 , which is 52.29% of the total amount of annual fertilization. It is scientific and technical groundwork to improve the utilization efficiency of nitrogen fertilizer and protect groundwater environment.
{"title":"Variations Regularity of Soil Nitrate Nitrogen in Hebei Piedmont Plain","authors":"Huiyan Gao, Lu-Hua Yang","doi":"10.2174/1874123101509010098","DOIUrl":"https://doi.org/10.2174/1874123101509010098","url":null,"abstract":"Field experiment was carried out to study on the spatial and temporal distribution of soil nitrate nitrogen at Ranzhuang water resources experiment station in Hebei piedmont plain from 2011 to 2012. The results show that nitrate nitrogen content varies in sinusoidal curve at shallow tilth soil and shows in \"W\" shape at deep soil profile during the wheat-maize rotation period. Nitrate nitrogen is mainly accumulated in 0~100cm soil and the maximum value occur at reviving stage in the wheat growth period. In the maize growth period, the distribution of nitrate nitrogen is double peak curve in 0~500cm soil profile. The maximum peak emerges at 150~260cm, the peak of soil nitrate content is between 36.7~106.36mg/kg. In 0~500cm soil layers, the cumulative amount of nitrate nitrogen is 1430.56~5126.05 kg/hm 2 . The amount of nitrate nitrogen leaching is 1294.13kg/hm 2 , which is 52.29% of the total amount of annual fertilization. It is scientific and technical groundwork to improve the utilization efficiency of nitrogen fertilizer and protect groundwater environment.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"23 1","pages":"98-102"},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76939739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-31DOI: 10.2174/1874123101509010084
Chengli Zhang, Dezhi Liang, Hai-qing Cui, D. Yin, Guoliang Song
Based on mass conservation, foam total amount balance thought and foam properties characterization model, a foam flooding mathematical model with three-phase and five components is established and numerically solved, the ex- plicit is used to solve the saturation equation and the implicit is used to solve the pressure equation in this model. By fit- ting the results of foam plugging capacity experiments and numerical calculation, the correctness of the model is verified. On this basis, the conceptual model is established to simulate and evaluate the sensitivity of influencing parameters of foam flooding plugging ability. The results show that: the plugging ability of foam system increases with the increase of foaming agent concentration. When the concentration of foaming agent is more than 0.3%, the resistance coefficient tends to steady; when gas-liquid ratio is 2:1, the foam plugging ability is the strongest. The plugging ability of foam system in- creases with the increase of permeability showing good permeability selectivity. If the permeability in the reservoir is higher then the profile control capability will also be stronger.
{"title":"Establishment of Mathematical Model and Sensitivity Analysis of PluggingCapacity of Multi-Component Foam Flooding","authors":"Chengli Zhang, Dezhi Liang, Hai-qing Cui, D. Yin, Guoliang Song","doi":"10.2174/1874123101509010084","DOIUrl":"https://doi.org/10.2174/1874123101509010084","url":null,"abstract":"Based on mass conservation, foam total amount balance thought and foam properties characterization model, a foam flooding mathematical model with three-phase and five components is established and numerically solved, the ex- plicit is used to solve the saturation equation and the implicit is used to solve the pressure equation in this model. By fit- ting the results of foam plugging capacity experiments and numerical calculation, the correctness of the model is verified. On this basis, the conceptual model is established to simulate and evaluate the sensitivity of influencing parameters of foam flooding plugging ability. The results show that: the plugging ability of foam system increases with the increase of foaming agent concentration. When the concentration of foaming agent is more than 0.3%, the resistance coefficient tends to steady; when gas-liquid ratio is 2:1, the foam plugging ability is the strongest. The plugging ability of foam system in- creases with the increase of permeability showing good permeability selectivity. If the permeability in the reservoir is higher then the profile control capability will also be stronger.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"38 1","pages":"84-89"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80153989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-31DOI: 10.2174/1874123101509010090
Liu Feng, Ma Fengshan, Guo Jie, Ding-Yuan Kuo
Water-rock interaction of the groundwater in aquifer system has been analyzed and inferred with hydrochemical and isotopic datum in Laizhou Bay, eastern China. 32 samples of groundwater from three boreholes (96-5#, 96-6#, 112- 1#), couples of seawater, saline water, fresh water, surface water and rainfall are obtained in study area for hydrochemical and isotopic analyses. The origin of groundwater is generally concluded by stable isotope (δ 18 O and δD) and the analytic results of Na + , Ca 2+ , Mg 2+ , Cl - , SO 4 2- , HCO 3 - changing with depth, combined with total dissolved solids (TDS), electrical conductivity (EC), can be apparently proofs for serious water-rock interaction. The conclusion reveals that the origin of 96-5#, 112-1# is most likely saline water different from that the groundwater of 96-6# which is possible originated from fresh water, surface water or mixing of both. Compared the ion content of same borehole at different depth and different boreholes with same depth, the optimal area for building main well and mining area is determined eventually is around 96-5#.
{"title":"Study of Water-rock Interaction with Hydrochemical and Isotopic Datum in Laizhou Bay","authors":"Liu Feng, Ma Fengshan, Guo Jie, Ding-Yuan Kuo","doi":"10.2174/1874123101509010090","DOIUrl":"https://doi.org/10.2174/1874123101509010090","url":null,"abstract":"Water-rock interaction of the groundwater in aquifer system has been analyzed and inferred with hydrochemical and isotopic datum in Laizhou Bay, eastern China. 32 samples of groundwater from three boreholes (96-5#, 96-6#, 112- 1#), couples of seawater, saline water, fresh water, surface water and rainfall are obtained in study area for hydrochemical and isotopic analyses. The origin of groundwater is generally concluded by stable isotope (δ 18 O and δD) and the analytic results of Na + , Ca 2+ , Mg 2+ , Cl - , SO 4 2- , HCO 3 - changing with depth, combined with total dissolved solids (TDS), electrical conductivity (EC), can be apparently proofs for serious water-rock interaction. The conclusion reveals that the origin of 96-5#, 112-1# is most likely saline water different from that the groundwater of 96-6# which is possible originated from fresh water, surface water or mixing of both. Compared the ion content of same borehole at different depth and different boreholes with same depth, the optimal area for building main well and mining area is determined eventually is around 96-5#.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"65 1","pages":"90-97"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83133500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-25DOI: 10.2174/1874123101509010071
S. Guoqing, Xiang Qisen, Zhao Wenen, Fang Yichao, Ma Tiantian, L. Ke, Li Yanqi
In order to effectively extract specific flavonoids with high biological activity from onionskin, NaNO 2 - Al(NO 3 ) 3 -NaOH coloration method, spectrophotometry and MTT method were adopted to study the yield rate and content of flavonoids obtained from alcohol water and alkali water extraction processes, and the antioxidant activities and the in vitro effects on K562 cell viability. The results indicate that yield rates of flavonoids obtained by alcohol water and alkali water extraction methods was 3.76% and 2.37% respectively, solid flavonoids contents were 42.20% and 76.21%; under the same concentration of total flavonoids, alkali water extract has weaker effect in removing superoxide anions and DPPHradicals, they have similar effect in removing nitrite and hydroxyl free radicals; in the test concentration range (40 ~ 200 µg / mL), they have similar effect in inhibiting the proliferation activity of K562 cells, the maximum inhibition rate of flavonoids obtained by alkali water extraction method is 77.71%, while maximum inhibition rate of flavonoid obtained by alcohol water extraction method is 70.64%. Both the flavonoids obtained from onionskins by alcohol water extraction method and alkali water extraction method have good biological activity. The alkali water extraction method is simple without any alcohol consumption, and the product purity is high, although the yield rate and certain biological activity of flavonoids obtained by alkali water extraction method are lower than those obtained by alcohol water extraction method, it still has certain significance in industrial production.
{"title":"Antioxidant Activities and the In Vitro Effects on K562 Cell Viability ofFlavonoids Obtained from Onion Skin by Different Extraction Methods","authors":"S. Guoqing, Xiang Qisen, Zhao Wenen, Fang Yichao, Ma Tiantian, L. Ke, Li Yanqi","doi":"10.2174/1874123101509010071","DOIUrl":"https://doi.org/10.2174/1874123101509010071","url":null,"abstract":"In order to effectively extract specific flavonoids with high biological activity from onionskin, NaNO 2 - Al(NO 3 ) 3 -NaOH coloration method, spectrophotometry and MTT method were adopted to study the yield rate and content of flavonoids obtained from alcohol water and alkali water extraction processes, and the antioxidant activities and the in vitro effects on K562 cell viability. The results indicate that yield rates of flavonoids obtained by alcohol water and alkali water extraction methods was 3.76% and 2.37% respectively, solid flavonoids contents were 42.20% and 76.21%; under the same concentration of total flavonoids, alkali water extract has weaker effect in removing superoxide anions and DPPHradicals, they have similar effect in removing nitrite and hydroxyl free radicals; in the test concentration range (40 ~ 200 µg / mL), they have similar effect in inhibiting the proliferation activity of K562 cells, the maximum inhibition rate of flavonoids obtained by alkali water extraction method is 77.71%, while maximum inhibition rate of flavonoid obtained by alcohol water extraction method is 70.64%. Both the flavonoids obtained from onionskins by alcohol water extraction method and alkali water extraction method have good biological activity. The alkali water extraction method is simple without any alcohol consumption, and the product purity is high, although the yield rate and certain biological activity of flavonoids obtained by alkali water extraction method are lower than those obtained by alcohol water extraction method, it still has certain significance in industrial production.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"47 1","pages":"71-77"},"PeriodicalIF":0.0,"publicationDate":"2015-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77144980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-25DOI: 10.2174/1874123101509010078
Hua-rui Hao, Yanqing Miao
To seek for new acidic corrosion inhibitor, this work used aliphatic amine, formaldehyde and sodium lignosulphonate as the raw materials to prepare new Mannich bases as eco-friendly corrosion inhibitors. The inhibition of these Mannich bases for mild steel corrosion in 2M HCl solution was investigated by weight loss technique. Through the single factor experiments, the optimal mole ratio was determined. Meanwhile, the influences of temperature and inhibitor dosage on the corrosion inhibition performance of the products were studied. The adsorptions on the surface of mild steel and inhibition mechanism were also discussed. Potentiodynamic polarization studies indicate that extracts are mixed-type inhibitors.
{"title":"Investigation of Lignosulphonate Mannich Bases as Corrosion Inhibitors","authors":"Hua-rui Hao, Yanqing Miao","doi":"10.2174/1874123101509010078","DOIUrl":"https://doi.org/10.2174/1874123101509010078","url":null,"abstract":"To seek for new acidic corrosion inhibitor, this work used aliphatic amine, formaldehyde and sodium lignosulphonate as the raw materials to prepare new Mannich bases as eco-friendly corrosion inhibitors. The inhibition of these Mannich bases for mild steel corrosion in 2M HCl solution was investigated by weight loss technique. Through the single factor experiments, the optimal mole ratio was determined. Meanwhile, the influences of temperature and inhibitor dosage on the corrosion inhibition performance of the products were studied. The adsorptions on the surface of mild steel and inhibition mechanism were also discussed. Potentiodynamic polarization studies indicate that extracts are mixed-type inhibitors.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"305 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82880333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-31DOI: 10.2174/1874123101509010067
Geng Di, Xuan Ma, L. Weng, Yi Litao, Y. Han, Xin Yang
A new acetophenone trimer, named ebracteolatain C, along with two known diterpenoids was isolated from Euphorbia ebtacteolata. The structure of the compound 1 was elucidated as 1-(3, 5-bis-(3-acetyl-2, 6-dihydroxy-4- methoxy-benzyl)-4, 6-dihydroxy-2-methoxy-phenyl)-ethanone on basis of spectroscopic methods.
{"title":"A New Acetophenone Trimer From Roots of Euphorbia ebracteolata","authors":"Geng Di, Xuan Ma, L. Weng, Yi Litao, Y. Han, Xin Yang","doi":"10.2174/1874123101509010067","DOIUrl":"https://doi.org/10.2174/1874123101509010067","url":null,"abstract":"A new acetophenone trimer, named ebracteolatain C, along with two known diterpenoids was isolated from Euphorbia ebtacteolata. The structure of the compound 1 was elucidated as 1-(3, 5-bis-(3-acetyl-2, 6-dihydroxy-4- methoxy-benzyl)-4, 6-dihydroxy-2-methoxy-phenyl)-ethanone on basis of spectroscopic methods.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"40 1","pages":"67-70"},"PeriodicalIF":0.0,"publicationDate":"2015-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85745788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-31DOI: 10.2174/1874123101509010058
Gao Yanjiao, Huang Runzhu, Song Tiehong
Hydrogen peroxide and ferrous sulfate were used to advanced treatment of landfill leachate effluent from biochemical tanks. Some influences on removing COD and chroma including the pH value of solution, the dosage of ferrous sulfate, the dosage of hydrogen peroxide and reaction time were investigated. The test results showed that for removal of COD and chroma the optimal pH was 3.0, the best ferrous sulfate and hydrogen peroxide dosage was 1500mg/L, 20mL/L respectively, and the optimal reaction time was 60min. Under optimal conditions, COD and chroma removal rate could reach 79.7% and 95.2% respectively.
{"title":"Using Fenton Oxidation Method to Advanced Treatment of Landfill Leachate","authors":"Gao Yanjiao, Huang Runzhu, Song Tiehong","doi":"10.2174/1874123101509010058","DOIUrl":"https://doi.org/10.2174/1874123101509010058","url":null,"abstract":"Hydrogen peroxide and ferrous sulfate were used to advanced treatment of landfill leachate effluent from biochemical tanks. Some influences on removing COD and chroma including the pH value of solution, the dosage of ferrous sulfate, the dosage of hydrogen peroxide and reaction time were investigated. The test results showed that for removal of COD and chroma the optimal pH was 3.0, the best ferrous sulfate and hydrogen peroxide dosage was 1500mg/L, 20mL/L respectively, and the optimal reaction time was 60min. Under optimal conditions, COD and chroma removal rate could reach 79.7% and 95.2% respectively.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"33 1","pages":"58-61"},"PeriodicalIF":0.0,"publicationDate":"2015-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77280371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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