Pakistan Journal of Chemistry最新文献_第8页

Antibacterial and Enzyme Inhibition Studies of N'-Substituted Benzylidene-2-(2, 4- Dimethylphenoxy) Acetatohydrazides N'-取代苄基-2-(2,4 -二甲基苯氧基)乙酰肼的抑菌和酶抑制研究

Pakistan Journal of Chemistry Pub Date : 2014-09-01 DOI: 10.15228/2014.V04.I03.P01

Aziz‐ur‐Rehman, S. Nadeem, M. Abbasi, S. Z. Siddiqui, S. Rasool, I. Ahmad, S. Afzal

引用次数: 1

Future of New Generation Aluminium and Composites in Aerospace Industry 新一代铝及复合材料在航空航天工业中的应用前景

Pakistan Journal of Chemistry Pub Date : 2014-06-30 DOI: 10.15228/2014.V04.I02.P05

W. Akhtar, N. Akhtar, S. J. Wu

引用次数: 3

Biochemical Response of Glycine Max after Inoculation of Different Concentrations of Fusarium Solani 接种不同浓度枯萎菌对甘氨酸Max的生化响应

Pakistan Journal of Chemistry Pub Date : 2014-06-30 DOI: 10.15228/2014.V04.I02.P07

A. Rehman, N. Hamid, B. Kanwal

引用次数: 0

Utilization of Activated Carbon for the Removal of Ni Metal from Industrial Liquid Waste 活性炭去除工业废液中金属镍的研究

Pakistan Journal of Chemistry Pub Date : 2014-06-30 DOI: 10.15228/2014.V04.I02.P06

H. Tahir, M. Qadri, Uroos Alam, N. Akhtar, M. Sultan

{"title":"Utilization of Activated Carbon for the Removal of Ni Metal from Industrial Liquid Waste","authors":"H. Tahir, M. Qadri, Uroos Alam, N. Akhtar, M. Sultan","doi":"10.15228/2014.V04.I02.P06","DOIUrl":"https://doi.org/10.15228/2014.V04.I02.P06","url":null,"abstract":"Environmental pollution caused by toxic metals seems to occur globally. Metal intoxicated wastewater can be challenging to health safety. The high concentration of pollutants is required to be removed before the discharge of wastewater into open waste streams. The present study relates the monitoring of heavy metals in the industrial waste coming from Shairshah, Lyari SITE industrial area and control sites selected from Clifton beach of Karachi (Pakistan). Concentrations of selected trace metals, Cr, Fe, Hg, Na, K, Cd, Pb, Ni, Zn, Mo, Mn and Cu were estimated by using Atomic Absorption Spectrophotometer, Flame Photometer and 200 Multi parameter Ion Specific Meter under standard analytical conditions. Statistical methods of relevance were applied to check the accuracy of the system. Selective removal of Ni metal from waste water was carried out by adsorption process using activated carbon prepared from agricultural waste. The effectiveness of the adsorption process has been tested under the optimized conditions of temperature, concentration, stay time and amount of adsorbent. Adsorption isotherm models like Freundlich and Langmuir were applied to determine the feasibility of process by finding the values oftheir respective constants. The R values show that Langmuir model was the best fitted adsorption model. The feasibility of adsorption process was determined by RL factor. Thermodynamic parameters such as free energy (ΔG ), enthalpy (ΔH ) and entropy (ΔS ) of the system were calculated. The sorption free energy (Es) was also estimated. The pHpzc of adsorbent was also estimated by adopting pH drift method. The percentage removal and distribution coefficient (KD) values for Ni removal were also determined. The present system represents that Ni and other metals can be effectively removed by employing adsorption method using low cost natural adsorbents.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"13 37 1","pages":"83-91"},"PeriodicalIF":0.0,"publicationDate":"2014-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80559402","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}

引用次数: 0

Comparative Studies of Various Phytonutrients in Citrus Fruits 柑橘类水果中各种植物营养素的比较研究

Pakistan Journal of Chemistry Pub Date : 2014-06-30 DOI: 10.15228/2014.V04.I02.P04

Shaukat Ali, S. Salman, M. Jan, M. S. Afridi, M. S. Malik

引用次数: 4

Synthesis, Spectral Characterization and biological activity of N-Substituted Derivatives of Tetrahydrofuran-2-ylmethylamine 四氢呋喃-2-甲基胺n取代衍生物的合成、光谱表征及生物活性研究

Pakistan Journal of Chemistry Pub Date : 2014-06-30 DOI: 10.15228/2014.V04.I02.P02

Aziz‐ur‐Rehman, S. Rasool, M. Abbasi, K. Khan, I. Ahmad, S. Afzal

引用次数: 0

Synthesis and Characterization of New Schiff Base and Its Metal (Cu, Ni, Co, Zn, Mn) Complexes 新型席夫碱及其金属(Cu, Ni, Co, Zn, Mn)配合物的合成与表征

Pakistan Journal of Chemistry Pub Date : 2014-06-30 DOI: 10.15228/2014.V04.I02.P03

I. Yıldırım, M. Şekerci, M. Karatepe

引用次数: 0

Search of Organochlorine Pesticide Residues (Pocs) in Bodies of Water in Cotton- Growing Area of Benin by GC-ECD GC-ECD法测定贝宁棉区水体中有机氯农药残留

Pakistan Journal of Chemistry Pub Date : 2014-06-22 DOI: 10.15228/2014.V04.I02.P01

Man Gbaguidi, L. Dovonon, A. Youssao, Mickael Saizonou, R. Djibril, Y. Mohamed, H. Soclo, B. Fayomi

{"title":"Search of Organochlorine Pesticide Residues (Pocs) in Bodies of Water in Cotton- Growing Area of Benin by GC-ECD","authors":"Man Gbaguidi, L. Dovonon, A. Youssao, Mickael Saizonou, R. Djibril, Y. Mohamed, H. Soclo, B. Fayomi","doi":"10.15228/2014.V04.I02.P01","DOIUrl":"https://doi.org/10.15228/2014.V04.I02.P01","url":null,"abstract":"Despite their incontestable services in agriculture, the use of pesticides is not without consequences on the environment. So, in an attempt to access the impacts of pesticides usage in agriculture in Benin, research of some residual organochloride pesticides have been conducted both in rainy and dry seasons in two cotton growing areas: the northern and central part of Benin. The analytical technique used is GC-ECD. During the dry season we notice that the DDT and its metabolites (DDE and DDD) represent 36% of all organochlorine pesticides (POCs) against 64 % of cyclodiens. Endosulfan comes first representing 57% of all organochlorine pesticides (POCs), then follows DDT with 17 %. During the rainy season these two types of organochlorine pesticides (POCs) represent 73% for cyclodiens and 23% for DDT and its by-products. Endosulfan comes first by representing 47% of all organochlorine pesticides (POCs) followed by DDT representing 12%. In the sediments and regardless of the season, the cyclodiens come first by representing 70% of all organochlorine pesticides (POCs) and then follows the DDT and its by-products which represent 30%. Since in the water column, the sediments are more contaminated in rainy season than in dry season (25273 ppb of all organochlorine pesticide (POCs) in rainy season against 2.256 ppb in dry season), it is derived from this study that northern areas are more contaminated than the central areas. Also a strong correlation has been established between the content of different moleculars of organochlorine pesticide (POCs). This means that the famers still use prohibited pesticides in the two areas despite existing laws like “Stockholm convention” which strictly ban the usage of those moleculars.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"100 1","pages":"49-61"},"PeriodicalIF":0.0,"publicationDate":"2014-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80314516","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}

引用次数: 2

Adsorption Studies of Phenol Using Thermally and Chemically Modified Rice Husk as Adsorbents 热改性和化学改性稻壳对苯酚的吸附研究

Pakistan Journal of Chemistry Pub Date : 2014-03-30 DOI: 10.15228/2014.V04.I01.P06

M. Yousaf, Ibrahim

{"title":"Adsorption Studies of Phenol Using Thermally and Chemically Modified Rice Husk as Adsorbents","authors":"M. Yousaf, Ibrahim","doi":"10.15228/2014.V04.I01.P06","DOIUrl":"https://doi.org/10.15228/2014.V04.I01.P06","url":null,"abstract":"* M. M. Yousaf and Ibrahim * Dept. of Chemistry, Islamia College University, Peshawar, Pakistan. Dept. of Chemistry, Post Graduate Jehanzeb College, Swat, Pakistan. E-mail: * Yousaf672010@hotmail.com ABSTRACT Most of the Phenols are hazardous substances and some are supposed to have carcinogenic activity. Thus it is necessary to remove Phenolics and other aromatics from the aqueous ecosystem. Traditional processes for the removal of Phenolics compounds are extraction, adsorption on granulated activated carbon, steam distillation, chemical and bacterial techniques. Literature survey show a number of methods like oxidation, ion exchange, reverse osmosis, electrochemical oxidation and adsorption. Phenol removal by process like, adsorption is the best method of choice as it can remove most of phenols in simple and easy way. In recent past; agricultural by-products such as, maize cob, date stone, apricot Stones, rice bran, and bagass pith have been extensively studied and used as adsorbents for the adsorption of hazardous substances from wastewater. In the present study we tried modified rice husks as potential adsorbents for the removal of Phenol from aqueous system. Batch mode studies were carried out. Isotherm data was generated and fitted in Freundlich and Langmuir equation to explain the phenomenon of adsorption. The adsorption capacities based on Langmuir model (Qm) of the 3 adsorbents were found to be 0.81 for raw husk (RH), 0.395 for the Grafted (G) and 2.306 mg/g for the Charred (C). The R 2 values were 0.92 for raw husk, 0.97 for grafted and 0.91 for charred husk. Based on Freundlich model the adsorption capacities (K) were 2.94, 2.29 and 1.25mg/g for Raw husk, grafted husk and charred husk. The R values were found to be 0.72, 0.95 and 0.83 for the raw husk, grafted husk and charred husk respectively. Our result showed that modified rice husks could be used as potential adsorbents for Phenol removal from aqueous system.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"6 1","pages":"31-38"},"PeriodicalIF":0.0,"publicationDate":"2014-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86882816","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}

引用次数: 1

Synthesis and Pharmacological Activities of N-(3-Hydroxyphenyl)Benzamide and its 3-O-Derivatives N-(3-羟基苯基)苯甲酰胺及其3- o衍生物的合成及药理活性

Pakistan Journal of Chemistry Pub Date : 2014-03-30 DOI: 10.15228/2014.V04.I01.P05

M. Abbasi, Aziz‐ur‐Rehman, M. Irshad, S. Z. Siddiqui, M. Ashraf

引用次数: 2