Cogent Environmental Science最新文献_第7页

Immobilised apple peel bead biosorbent for the simultaneous removal of heavy metals from cocktail solution 固定化苹果皮珠生物吸附剂同时去除鸡尾酒溶液中的重金属

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1673116

Rishan Singh, Candace E Martin, D. Barr, R. Rosengren

{"title":"Immobilised apple peel bead biosorbent for the simultaneous removal of heavy metals from cocktail solution","authors":"Rishan Singh, Candace E Martin, D. Barr, R. Rosengren","doi":"10.1080/23311843.2019.1673116","DOIUrl":"https://doi.org/10.1080/23311843.2019.1673116","url":null,"abstract":"Abstract Low cost water purification methods are needed in developing countries. Therefore, we have examined the biosorption potential of apple peel immobilised on sodium alginate beads. This was performed using a solution containing seven toxic ions, namely arsenic, cadmium, chromium, copper, mercury, lead and nickel. The effects of pH, contact time, biosorbent concentration and the presence of co-ions was investigated. Results showed that biosorption of all the ions except As and Cr was pH-dependent. At neutral pH the biosorption order for apple peel beads was Cd > Cu > Pb > Ni > Hg > Cr > As with 90, 80, 73, 72, 70, 10 and 2% biosorption, respectively. Biosorption reached equilibrium for Pb (6 h), Hg (10 h), Cd and Ni (24 h), and Cu (48 h). Kinetic models for film diffusion, pore diffusion, pseudo-first order (PFO), pseudo-second order and Elovich equation were applied and PFO was found to be the best fitting model based on coefficient of determination values. The biosorption of ions by apple peel beads was significantly higher than with empty beads throughout the time course (15 min—72 h). Biosorption increased with increasing biosorbent concentration for all ions except As, Cr and Hg. A significant suppression in biosorption for all ions was observed in the presence of co-ions, except for Cd and Cu. In conclusion, apple peel beads have the ability to remove toxic ions from a cocktail solution that has properties that mimic drinking water.","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1673116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41264492","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: 17

Arsenic toxicity, bioaccumulation and risk assessment: A case study in Tolimique Dam, Aguascalientes, Mexico 砷的毒性、生物蓄积和风险评估:以墨西哥阿瓜斯卡连特斯Tolimique水坝为例

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1650630

Jesús Alvarado-Flores, I. Rubio-Franchini, A. Sanchez-Avila, Gabriel de Jesús Ramírez-Tlalolín, R. Rico-Martínez

{"title":"Arsenic toxicity, bioaccumulation and risk assessment: A case study in Tolimique Dam, Aguascalientes, Mexico","authors":"Jesús Alvarado-Flores, I. Rubio-Franchini, A. Sanchez-Avila, Gabriel de Jesús Ramírez-Tlalolín, R. Rico-Martínez","doi":"10.1080/23311843.2019.1650630","DOIUrl":"https://doi.org/10.1080/23311843.2019.1650630","url":null,"abstract":"Abstract We detected arsenic near the Tolimique Dam, an archaeological ecotourism area in Aguascalientes, México. Fortunately, the concentration range of this metalloid (0.001 to 0.003 mg L−1) did not exceed the total arsenic in water allowed by NOM-127-SSA1-1994 (0.025 mg L−1). However, because arsenic is a high-risk priority pollutant at low concentrations in aquatic ecosystems, we studied the acute toxicity, bioaccumulation, and endocrine disruption of arsenic using native species of Rotifera (Brachionus calyciflorus Pallas, 1766, Brachionus rubens Ehrenberg, 1838, and Lecane cornuta Müller, 1786), Oligochaeta (Aeolosoma hemprichi Ehrenberg, 1838), and fish (Oreochromis nilotica Linnaeus, 1758). We found 20 species in the Tolimique Dam, including 13 rotifer species, 4 cladocerans species, and one of each of the following species: copepods, oligochaetes, and fish. Environmental Risk Assessment (ERA) was performed using the Predicted No-Effect Concentration (PNEC) and the Measured Environmental Concentration (MEC) of arsenic. In conclusion, arsenic produced cellular necrosis in A. hemprichi at a concentration of 5.0 mg L−1 and endocrine disruption in B. calyciflorus at a concentration of 0.05 mg L−1. The detection of arsenic at an average of 2.05 ± 0.30 mg Kg−1 in O. niloticus fish suggests a probable biomagnification of arsenic.","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1650630","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43038991","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: 7

Evaluation of the community resources management area (CREMA) programme around Ankasa conservation area, Ghana 评估加纳安卡萨保护区周围的社区资源管理区（CREMA）方案

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1592064

G. Bempah, K. B. Dakwa, K. Monney

引用次数: 8

Effect of type and rate of urea fertilizers on nitrogen use efficiencies and yield of wheat (Triticum aestivum) in Northern Ethiopia 氮肥种类和用量对埃塞俄比亚北部小麦氮素利用效率和产量的影响

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1655980

Okubay Giday

{"title":"Effect of type and rate of urea fertilizers on nitrogen use efficiencies and yield of wheat (Triticum aestivum) in Northern Ethiopia","authors":"Okubay Giday","doi":"10.1080/23311843.2019.1655980","DOIUrl":"https://doi.org/10.1080/23311843.2019.1655980","url":null,"abstract":"Abstract A field experiment was conducted to evaluate the effect of type and rate of urea fertilizers on nitrogen use efficiency and yield of wheat (Triticum aestivum) in northern Ethiopia. The field experiment comprised five treatments, i.e. three treatments with the application of super granular urea (SGU) (application rates of 23, 46 and 69 kg N ha−1), one treatment with the application of conventional urea (CU) fertilizer (46 kg N ha−1) and one control (without any N fertilizer application) laid down in a randomized complete block design. All experimental units were supplied with a uniform rate of 46 kg phosphorus (P) ha−1in the form of triple superphosphate (TSP) at planting time. At harvest, the crop was partitioned into straw and grain for the determination of N concentration, uptake of N fertilizer recovery and use efficiency. Application of SGU fertilizer has affected the grain and straw N content and uptake of the crop. These showed an increasing trend with increasing N rate where the maximum was obtained at the highest rate of SGU (69 kg N ha−1) application. The application of 46 kg N ha−1 via SGU fertilizer revealed a yield advantage of 497.67 kg ha−1 compared to the application of 46 kg N ha−1 with conventional urea (CU) fertilizer. As a general conclusive remark, the results of the current study show that the application of SGU fertilizer can increase yield and nitrogen use efficiency of wheat crop compared with CU fertilizer. Moreover, the application with 46 kg N ha−1 with SGU fertilizer was the optimum rate.","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1655980","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47515233","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: 7

On the dominance of Pb during competitive biosorption from multi-metal systems: A review 多金属系统竞争性生物吸附过程中Pb的优势研究综述

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1635335

C. Mahamadi

{"title":"On the dominance of Pb during competitive biosorption from multi-metal systems: A review","authors":"C. Mahamadi","doi":"10.1080/23311843.2019.1635335","DOIUrl":"https://doi.org/10.1080/23311843.2019.1635335","url":null,"abstract":"Abstract Biosorption, despite being initially heralded as a technology offering great potential for detoxification, is still yet to be commercialized. One of the reasons given is the lack of universal understanding of the mechanisms involved. This review focused on the removal of heavy metals from solutions in which Pb(II) co-existed with other metals in binary, ternary and quaternary systems. Trends in sorption capacities were analysed using ratios of maximum adsorption capacities: , , and , where and represent the adsorption capacity in the presence and absence of the interfering metal ion, respectively, and is the metal ion co-existing with Pb(II). The data in literature were analysed for selected metal ions Pb(II), Cu(II), Zn(II), Cd(II), Ni(II) and Cr(III). It was shown that for all systems analysed, the ratio: < 1, thus confirming that the simultaneous presence of metal ions in solution reduced their adsorption capacities. For the selected Pb/Cu system it was shown that generally > , and , thus confirming antagonistic effects for the system. It was further shown that Pb(II) contributed to 70–77% of the total adsorption capacity, and the % change in adsorption capacity (ⵠ) was negative. In conclusion, these findings confirmed the superiority of Pb(II) adsorption across several metal-biosorbent systems, which has implications on the designing of model biotechnologies for possible practical applications.","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1635335","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45673981","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: 17

Factors affecting farm management adaptation strategies to climate change: The case of western Lake Tana and upper Beles watersheds, North West Ethiopia 影响农业管理适应气候变化策略的因素:以埃塞俄比亚西北部塔纳湖西部和贝勒斯上游流域为例

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1708184

Astewel Takele, Assefa Abelieneh, B. A. Wondimagegnhu

{"title":"Factors affecting farm management adaptation strategies to climate change: The case of western Lake Tana and upper Beles watersheds, North West Ethiopia","authors":"Astewel Takele, Assefa Abelieneh, B. A. Wondimagegnhu","doi":"10.1080/23311843.2019.1708184","DOIUrl":"https://doi.org/10.1080/23311843.2019.1708184","url":null,"abstract":"Abstract Ethiopia is vulnerable to climate change and variability. This research investigates the factors that affect farm management adaptation strategies to climate change in west of Lake Tana and Beles river watersheds of Northwest Ethiopia. A survey was conducted collecting data from 338 households through a semi-structured interview schedule. To analyze the data, the multivariate probit model was used. The results indicated that market distance, frequency of extension services and oxen ownership have highly influenced the choice of crop management adaptation strategies to climate change. The likelihood of adopting short- mature crops, high yielding crop variety, and crop compost preparation was relatively higher (95%) as compared to the probability of adopting other strategies. The joint probabilities of success of the adaptation of the crop management adaptation strategies were 15%. Hence, households are more likely to jointly adopt the crop management climate change strategies. Similarly, age of household head, market distance, and oxen ownership were important characteristics affecting the farmers’ choice of animal management as climate change adaptation strategy. The likelihood of adopting hay preparation (89.4%), cut and carry system (77.4%), herd size determination (69.6%) and rotational grazing (67%) were also relatively higher as compared to other strategies. The joint probabilities of adaptation of animal management as climate change adaptation strategy was more likely to be applicable if adoption of the technologies (16.8%) were made jointly compared to their failure to jointly adopt them. Therefore, promoting complementary farm management adaptation practices and considering the socioeconomic factors are crucial to mitigate climate change vulnerability in the study area.","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1708184","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45513862","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: 3

Evaluation of incorporating plastic wastes into asphalt materials for road construction in Ghana 将塑料垃圾掺入加纳道路施工沥青材料的评价

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1576373

Patricia Nana Ama Asare, F. A. Kuranchie, E. Ofosu

{"title":"Evaluation of incorporating plastic wastes into asphalt materials for road construction in Ghana","authors":"Patricia Nana Ama Asare, F. A. Kuranchie, E. Ofosu","doi":"10.1080/23311843.2019.1576373","DOIUrl":"https://doi.org/10.1080/23311843.2019.1576373","url":null,"abstract":"Abstract In improving the aesthetics of the environment, the management of plastic wastes cannot be left out of the picture. Among the numerous ways that plastic wastes are managed, incorporating them into plastic roads is another viable option. This study quantified plastic wastes generation in Sunyani Municipality in Ghana and investigated the optimum percentage of asphaltic materials that could be made of plastic wastes for road construction in Ghana. Plastic Wastes were obtained from social gatherings, residential areas and restaurants, there was dialogue with key persons in the plastic industry and various experiments were also conducted for plastic wastes utilization in road construction. It was found that only one entrepreneur recycles the plastic wastes to make bags, dustbins, ropes and many more in the Municipality. It was also estimated that plastic wastes generation in the municipality per capita was 49.7 g/person/day whiles the total plastic wastes generated in the Municipality was 6,725.64 kg/day. In addition, numerous experimentations proved that it is possible to substitute about 10% of asphaltic road materials with plastic wastes as plastic coated aggregates (PCA) to meet the Ghana Highways Authority (GHA) standards for road construction. The novelty finding in this research is that substitution of about 10% or more of asphaltic road materials in Ghana with plastic wastes could bring economy and cost savings in both road construction and plastic wastes management in Ghana.","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1576373","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46954466","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: 18

Correction 修正

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1703314

引用次数: 0

Evaluating the relationship between the growth of fish and energy component of their prey 评估鱼类生长与猎物能量成分之间的关系

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1609225

C. Cárcamo, J. Estrada, C. Canales-Cerro, M. F. Hernández, R. Herrera, Blanca E. Molina-Burgos, Diego Esteban Toledo Riquelme, Consuelo Salas, Mauricio Zúñiga, S. Klarian

{"title":"Evaluating the relationship between the growth of fish and energy component of their prey","authors":"C. Cárcamo, J. Estrada, C. Canales-Cerro, M. F. Hernández, R. Herrera, Blanca E. Molina-Burgos, Diego Esteban Toledo Riquelme, Consuelo Salas, Mauricio Zúñiga, S. Klarian","doi":"10.1080/23311843.2019.1609225","DOIUrl":"https://doi.org/10.1080/23311843.2019.1609225","url":null,"abstract":"Abstract Fish growth analysis is a fundamental part of research in fisheries biology, aquaculture, and physiology. However, there is the question of whether the addition of mass and length depends on the amount of energy a prey can deliver. This study tested the hypothesis that there is an effect on the length/weight ratio of the predator, under the premise that fish that ingest prey with a greater amount of energy will have greater mass growth, in contrast to those that ingest food with lesser energy. The fish in this experiment was under controlled laboratory conditions under two types of food treatment and one control (low energy vs high energy amount). The energy-rich treatment had a significant effect on the mass increase (GLM; F = 2.72; P = 0.031), and the length/weight ratio was greater in the fish under the energy-rich treatment (ANCOVA; F = 3.59; P = 0.043). However, the IGR showed that fish presented low rates of intrinsic size growth (ANOVA; F = 0.189; P = 0.828).","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1609225","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42307879","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

Vermiculture in animal farming: A review on the biological and nonbiological risks related to earthworms in animal feed 动物养殖中的蚯蚓养殖:动物饲料中蚯蚓相关的生物和非生物风险综述

Cogent Environmental Science Pub Date : 2019-01-01 DOI: 10.1080/23311843.2019.1591328

P. Byambas, J. Hornick, D. Marlier, F. Francis

{"title":"Vermiculture in animal farming: A review on the biological and nonbiological risks related to earthworms in animal feed","authors":"P. Byambas, J. Hornick, D. Marlier, F. Francis","doi":"10.1080/23311843.2019.1591328","DOIUrl":"https://doi.org/10.1080/23311843.2019.1591328","url":null,"abstract":"Abstract Earthworms are part of natural diet of some farm animals such as poultry. They are a protein source. Unfortunately, earthworms can accumulate some toxic substances occurring in the soil and animals can be contaminated through feed containing these earthworms. The biological and nonbiological risks related to earthworms depend on the type of substrates through which they live. Earthworms are usually contaminated in polluted soil by various types of toxic and poisonous substance. The most common toxic compounds are heavy metals, pesticides and microbial toxins, which can lead to toxic or poisonous contamination of earthworms and then animals, such as poultry, fish and swine, through feeding. This risk cannot be identified in earthworm body without its destruction. But according to toxic substance targeted, there are many ways of risks detection, in soil, earthworms and animals. To protect farm animals, different technics are available. To limit heavy metal contamination, soil should be analyzed before collecting earthworms. Many treatments are available. By heating at 80°C for 2–4 h, microorganisms can be destroyed. Nevertheless, this technique needs to be adapted with certain types of bacteria whose enterotoxin withstands temperatures of 100°C for 30 min, or more. To limit all these risks, the use of earthworms reared from vermiculture can help to prevent contamination of poultry through feeding.","PeriodicalId":45615,"journal":{"name":"Cogent Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23311843.2019.1591328","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42776195","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: 9