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Leaching of phosphorus from incinerated sewage sludge ash by means of acid extraction followed by adsorption on orange waste gel

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Journal of Environmental Sciences 2009年第12期21卷 1753-1760页

作者： biplob kumar biswas Katsutoshi Inoue Hiroyuki Harada Keisuke Ohto Hidetaka Kawakita Department of Applied Chemistry Saga University

Ashes from sewage sludge incineration have a high phosphorus content, approximately 8% （W/W）, which indicates a potential resource of the limiting nutrient. Incineration of sewage sludge with subsequent recovery of phosphorus is a relatively new sludge treatment technique. In this article, the leaching of phosphorus by using sulfuric acid as well as hydrochloric acid by means of several batch experiments was presented. At the same time a selective recovery of phosphorus by adsorption was also discussed. The effects of acid concentration, temperature and time on extraction were studied. The phosphorus leaching increased with the increase in acid concentration and temperature. Kinetic studies showed that the complete leaching of phosphorus took place in less than 4 h. Selective adsorption of phosphorus by using orange waste gel provided a hint for recovery of this natural resource, which eventually could meet the ever-increasing requirement for phosphorus. The overall results indicated that the incinerated sewage sludge ash can be treated with acid to efficiently recover phosphorus and thus can be considered a potentially renewable source of phosphorus.

关键词： sewage sludge ash phosphorus metals acid extraction recovery

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Environmentally Benign Adsorption Materials for Removing Arsenic from Aquatic Environment

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Advances in Materials Physics and Chemistry 2018年第1期8卷 51-70页

作者： Katsutoshi Inoue Hiroyuki Harada Kedar Nath Ghimire biplob kumar biswas Hidetaka Kawakita Keisuke Ohto Department of Applied Chemistry Faculty of Science & Engineering Saga University Saga Japan Department of Environmental Science Prefectural University of Hiroshima Shobara Japan Central Department of Chemistry Tribhuvan University Kathmandu Nepal Department of Chemical Engineering Jessore University of Science and Technology Jessore Bangladesh

Adsorptive removal of arsenic using adsorption gels prepared from orange and apple juice residues was reviewed by summarizing the authors’ previous papers. Orange and apple juice residues contain a large amount of pectin, partly methyl-esterified pectic acid, which exhibits high affinity for high-valent metal ions such as iron(III), rare earths(III) and zirconium(IV). Anionic species of arsenic(III, V) are effectively and selectively adsorbed on pectic acid gel via loading these high-valent metal ions. Raw orange juice residue was saponified using calcium hydroxide to improve the loading capacity for these metal ions. It was found that zirconium(IV) exhibits the most suitable adsorption behaviors for arsenic(III, V). Similar result was obtained also for apple juice residue. An actual sample of acid mine drainage from the Horobetsu mine which contained a high concentration of iron and low concentration of arsenic, was tested using the adsorption gel prepared from orange juice residue and the results were compared with those from the current treatment process based on coprecipitation with iron hydroxide. The new process using the above- mentioned adsorption gel was proposed for treatment of such acid mine drainage.

关键词： Adsorbents Arsenic Orange Wastes Removal Aquatic Environment

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Prevalence and Associated Factors of Anemia among Pregnant Women Receiving Antenatal Care (ANC) at Fatima Hospital in Jashore, Bangladesh: A Cross-Sectional Study

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Food and Nutrition Sciences 2019年第9期10卷 1056-1071页

作者： Suzon Ahmed Md. Abdullah Al Mamun Niaz Mahmud Nisat Farzana Mosammat Sadia Akther Sathi biplob kumar biswas Amit Datta Tanvir Ahmad Department of Nutrition and Food Technology Faculty of Applied Science and Technology Jashore University of Science and Technology Jashore Bangladesh

Since anemia is one of the most skyrocketed public health problems worldwide, an investigation has thus been conducted to assess the prevalence and associated factors of anemia among the pregnant women receiving antenatal care (ANC) at Fatima Hospital in Jashore, Bangladesh. Facility-based cross-sectional study was carried out among 384 pregnant women at Fatima hospital, Bangladesh from February to April, 2019. Data were obtained using a structured questionnaire and participant’s current medical record card. Binary logistic regression analysis was used to identify factors associated with anemia and a P-value < 0.05 was considered as statistically significance. The overall prevalence of anemia among pregnant women was 58.9% (226/384). Out of 226 anemic pregnant mothers, 36.3% (82/226) were mildly anemic, 62.4% (141/226) were moderately anemic and 1.3% (3/384) was severely anemic. Binary logistic regression analysis revealed that the following variables were significantly associated with anemia: Monthly family income (11,000 - 20,000 Taka) [AOR (95% CI) = 0.45 (0.21 - 0.98)], Family size (joint) [AOR (95% CI) = 1.59 (1.03 - 2.45)], Gestational age (third trimester) [AOR (95% CI) = 2.18 (1.40 - 3.40)], birth spacing < 2 years [AOR (95% CI) = 2.87 (1.51 - 5.44)], Excessive blood loss during previous surgery (Yes) [AOR (95% CI) = 2.08 (1.14 - 4.17)], Food group eaten 24 hours (1 - 4 groups) [AOR (95% CI) = 3.43 (1.84 - 6.39)], Breakfast regularly (No) [AOR (95% CI) = 3.64 (1.36 - 9.75)]. The results obtained showed that the prevalence of anemia among pregnant women is severe at Fatima Hospital in Jashore, Bangladesh.

关键词： Anemia Antenatal Care (ANC) Socio-Demographic Characteristics Maternal Characteristics Dietary Characteristics Nutritional Characteristics

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Pharmaceutical amorphous solid dispersion: A review of manufacturing strategies

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Acta Pharmaceutica Sinica B 2021年第8期11卷 2505-2536页

作者： Sonal V.Bhujbal biplob Mitra Uday Jain Yuchuan Gong Anjali Agrawal Shyam Karki Lynne S.Taylor Sumit kumar Qi(Tony)Zhou Department of Industrial and Physical Pharmacy College of PharmacyPurdue University Oral Product Development Bristol Myers Squibb Material Science and Engineering Bristol Myers Squibb

Amorphous solid dispersions(ASDs)are popular for enhancing the solubility and bioavailability of poorly water-soluble *** approaches have been employed to produce ASDs and novel techniques are *** review provides an updated overview of manufacturing techniques for preparing *** physical stability is a critical quality attribute for ASD,the impact of formulation,equipment,and process variables,together with the downstream processing on physical stability of ASDs have been *** strategies are proposed to identify suitable manufacturing methods,which may aid in the development of ASDs with satisfactory physical stability.

关键词： Amorphous solid dispersions Stability Drug delivery Manufacturing Solvent evaporation Melting process Co-precipitation Downstream processing Selection criteria

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Low-cost mobile hatchery produced silver barb(Barbodes gonionotus)fingerling:it's growth and economic performance in intensive culture system

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Journal of Coastal Life Medicine 2014年第8期 601-605页

作者： S.M.Mustafizur Rahman biplob Basak Siddhwartha kumar Basak Md.Rushna Alam Md.Mohsin Ali Mohammad Mahfujul Haque Departmen of Aquaculture Bangladesh Agricultural UniversityMymensinghBangladesh Department of Aquaculture Patuakhali Science and Technology UniversityPatuakhaliBangladesh

Objective:To explore the growth performance of low-cost mobile hatchery produced silver barb(Barbodes gonionotus)fingerling comparing with typical one,field laboratory complex ***:Assigning Treatment I and Treatment II stoked with low-cost mobile hatchery and field laboratory complex hatchery originated fingerling of silver barb in plastic circular ***:The average weight gain(g/day)of fish was 0.18 and 0.16 g,length gain(cm/d)0.03 and 0.02,gross yield 0.09 and 0.08 kg/tank per month,net yield 0.03 and 0.01 kg/tank per month respectively in Treatment I and Treatment *** growth of low-cost mobile hatchery produced silver barb was higher(P<0.05)although SGR(%/d)was 1.63 and 1.89 and FCR was 2.57 and 2.55 for Treatment I and Treatment II,correspondingly and survival was 100%in both *** case of economic efficiency,total operating cost were BDT 68.91 and 67.41,revenue BDT 107.35 and 89.30,net profit BDT 38.44 and 21.89 and BCR 1.55 and 1.32 respectively in low-cost mobile hatchery and field laboratory complex hatchery produced ***:The fry from both origins showed more or less similar growth performance and none of them was *** the economic feasibility in both cases,it is assumed that the intensive culture of silver barb is possible at field level.

关键词： Fingerling Mobile hatchery Growth performance Barbodes gonionotus

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