Pub Date : 2023-01-01DOI: 10.32508/stdjsee.v7i1.727
Huyen Thi Thu Do, Tram Thi Bich Ly
Since 2010, the authorities of Binh Duong province has focused on encouraging and prompting establishments that perform well in environmental protection through the form of Binh Duong Provincial Green Book every two years. This is for the purpose of honoring the establishments operating in Binh Duong province that good at environmental protection, creating the motivation to improve environmental management and more businesses will be encouraged in doing well in environmental protection; thereby bringing positive results in the province's environmental protection work. In 2022, to follow up the innovations in environmental protection regulations and to contribute to the implementation of the state's policy on environmental protection as prescribed in Clause 8 Article 5 of the Law on Environmental Protection in 2020, the process and set of criteria for assessing in Binh Duong provincial Green Book have been adjusted in accordance with the provisions of the Law on Environmental Protection 2020, Decree 08/2022/ND-CP and Circular 02/2022/TT-BTNMT. The results applied in 95 enterprises in many different industries and areas in Binh Duong province showed that 53.25% of enterprises met the criteria of the Green Book. The set of evaluation criteria has a total score of 108 points, including 03 groups of main criteria and sub-criteria focusing on assessing compliance with environmental regulations and standards and industrial hygiene; compliance assessment of environmental procedures, records and related matters; and incentive scoring criteria. Each criterion group is scored based on its importance. Based on the actual survey results, the ranking of each enterprise is based on the score calculated according to this set of criteria. Up to 46.75% of enterprises did not meet the criteria due to many objective and subjective reasons, some of which are mainly as follows: Lack of certification of completion of environmental protection works or the waste treatment systems as prescribed in Decree 40/2019/ND-CP; the non-standard/normative of the results of environmental analysis at the time of survey; operating not in accordance with the approved Environmental Impact Assessment (EIA); and lack of approved environmental records. This assessment result has been used as a basis by the People's Committee of Binh Duong province to commend and reward enterprises with good achievements in environmental protection work in the province.
{"title":"Evaluation and ranking of several enterprises according to the Binh Duong green Book criteria in 2022","authors":"Huyen Thi Thu Do, Tram Thi Bich Ly","doi":"10.32508/stdjsee.v7i1.727","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i1.727","url":null,"abstract":"Since 2010, the authorities of Binh Duong province has focused on encouraging and prompting establishments that perform well in environmental protection through the form of Binh Duong Provincial Green Book every two years. This is for the purpose of honoring the establishments operating in Binh Duong province that good at environmental protection, creating the motivation to improve environmental management and more businesses will be encouraged in doing well in environmental protection; thereby bringing positive results in the province's environmental protection work. In 2022, to follow up the innovations in environmental protection regulations and to contribute to the implementation of the state's policy on environmental protection as prescribed in Clause 8 Article 5 of the Law on Environmental Protection in 2020, the process and set of criteria for assessing in Binh Duong provincial Green Book have been adjusted in accordance with the provisions of the Law on Environmental Protection 2020, Decree 08/2022/ND-CP and Circular 02/2022/TT-BTNMT. The results applied in 95 enterprises in many different industries and areas in Binh Duong province showed that 53.25% of enterprises met the criteria of the Green Book. The set of evaluation criteria has a total score of 108 points, including 03 groups of main criteria and sub-criteria focusing on assessing compliance with environmental regulations and standards and industrial hygiene; compliance assessment of environmental procedures, records and related matters; and incentive scoring criteria. Each criterion group is scored based on its importance. Based on the actual survey results, the ranking of each enterprise is based on the score calculated according to this set of criteria. Up to 46.75% of enterprises did not meet the criteria due to many objective and subjective reasons, some of which are mainly as follows: Lack of certification of completion of environmental protection works or the waste treatment systems as prescribed in Decree 40/2019/ND-CP; the non-standard/normative of the results of environmental analysis at the time of survey; operating not in accordance with the approved Environmental Impact Assessment (EIA); and lack of approved environmental records. This assessment result has been used as a basis by the People's Committee of Binh Duong province to commend and reward enterprises with good achievements in environmental protection work in the province.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135604615","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i2.734
Thi Thu Trang Luong, Thi Anh Thu Tran
This study aimed to explore the effects of agricultural waste (rice straw-RS and maize stalks-MS) in reducing Cd toxicity. Experiments in the study determined: growth of pak choi, total Cd concentration in the plant and the change in distribution of Cd fraction in the soil. Results showed that: agricultural waste application may detoxify Cd at excessive concentrations (3 and 6 mg/kg) by transforming mobile Cd fractions (EXC-Cd and CAB-Cd) into semi-mobile and non-mobile Cd fractions (FEM-Cd, OM-Cd, and RES-Cd); the Cd concentrations in pak choi decreased and pak choi growth increased. However, a significant reduction in Cd concentration can only occur when agricultural waste application is at an appropriate content (20 g/kg). In addition, agricultural waste application promoted the growth of pak choi at lower content (10 g/kg). Furthermore, this study also showed a good correlation between the ratio of mobile Cd fractions (EXC-Cd and CAB-Cd) with Cd concentration in pak choi and plant growth. This study suggested that agricultural waste application, especially rice straw, plays an important role in preventing Cd uptake by plant tissues at excessive concentrations through transformations into immobile Cd fractions.
{"title":"The effect of agricultural waste inhibit the uptake of Cadmium (Cd) by pak choi in assumption conditions of contaminated soil","authors":"Thi Thu Trang Luong, Thi Anh Thu Tran","doi":"10.32508/stdjsee.v7i2.734","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i2.734","url":null,"abstract":"This study aimed to explore the effects of agricultural waste (rice straw-RS and maize stalks-MS) in reducing Cd toxicity. Experiments in the study determined: growth of pak choi, total Cd concentration in the plant and the change in distribution of Cd fraction in the soil. Results showed that: agricultural waste application may detoxify Cd at excessive concentrations (3 and 6 mg/kg) by transforming mobile Cd fractions (EXC-Cd and CAB-Cd) into semi-mobile and non-mobile Cd fractions (FEM-Cd, OM-Cd, and RES-Cd); the Cd concentrations in pak choi decreased and pak choi growth increased. However, a significant reduction in Cd concentration can only occur when agricultural waste application is at an appropriate content (20 g/kg). In addition, agricultural waste application promoted the growth of pak choi at lower content (10 g/kg). Furthermore, this study also showed a good correlation between the ratio of mobile Cd fractions (EXC-Cd and CAB-Cd) with Cd concentration in pak choi and plant growth. This study suggested that agricultural waste application, especially rice straw, plays an important role in preventing Cd uptake by plant tissues at excessive concentrations through transformations into immobile Cd fractions.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135504841","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i2.737
Anh Thị Lan Nguyen, Thu Thi Anh Tran, Than Hien Nguyen, Hien Trong Dieu Le
Water is one of the most important and precious resources for the human life and species, a particularly important factor to ensure the successful implementation of strategies and plans for economic and social development, and to ensure national security. However, water quality is significantly degraded by global climate change and increasing over-exploitation activities. The study assessed the water quality on the Hau River, the part running through Vinh Long province, as an information sourse for the water resources management and protection in this river. Water quality data used in the study provided by the Department of Natural Resources of Vinh Long province at 7 sites on the Hau river. The results show that at most of the monitoring locations, temperature and pH were consistent with the lifespan of aquatic organisms. TSS parameters, and the content of nutrients and organic matter exceeded national water surface standards. Applying principal component analysis (PCA), we investigated the relationship between water quality parameters. The results of PCA analysis showed that COD, BOD5, pH, Coliform, P-PO43-, N-NO3-, TSS, and EC have the key factor on the quality in Hau river flowing through Vinh Long province mainly originating from areas of aquaculture, agricultural and industrial activities. Therefore, it is necessary to include these 8 criteria as the key criteria in the surface water quality monitoring and surveying program of the Hau river flowing through Vinh Long province.
{"title":"Assessment of water quality in Hau river flowing through Vinh Long province using principal component analysis","authors":"Anh Thị Lan Nguyen, Thu Thi Anh Tran, Than Hien Nguyen, Hien Trong Dieu Le","doi":"10.32508/stdjsee.v7i2.737","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i2.737","url":null,"abstract":"Water is one of the most important and precious resources for the human life and species, a particularly important factor to ensure the successful implementation of strategies and plans for economic and social development, and to ensure national security. However, water quality is significantly degraded by global climate change and increasing over-exploitation activities. The study assessed the water quality on the Hau River, the part running through Vinh Long province, as an information sourse for the water resources management and protection in this river. Water quality data used in the study provided by the Department of Natural Resources of Vinh Long province at 7 sites on the Hau river. The results show that at most of the monitoring locations, temperature and pH were consistent with the lifespan of aquatic organisms. TSS parameters, and the content of nutrients and organic matter exceeded national water surface standards. Applying principal component analysis (PCA), we investigated the relationship between water quality parameters. The results of PCA analysis showed that COD, BOD5, pH, Coliform, P-PO43-, N-NO3-, TSS, and EC have the key factor on the quality in Hau river flowing through Vinh Long province mainly originating from areas of aquaculture, agricultural and industrial activities. Therefore, it is necessary to include these 8 criteria as the key criteria in the surface water quality monitoring and surveying program of the Hau river flowing through Vinh Long province.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"269 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135507023","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i1.702
Si Quang Nguyen, Anh Tu Tran, Thi Thuy Thai, Phuoc Dan Nguyen, Thi Minh Tam Le, Sarah Tweet
In the earth's water cycle, groundwater is the most difficult component to assess. Scientists have long used isotopes to find out whether groundwater is replenished, and where it comes from. Water from different locations has different isotopic characteristics and is known as a "fingerprint". Scientists use these fingerprints to track the movement of water along its path throughout the entire water cycle. The isotope ratios 2H/1H and 18O/16O in water provide a wealth of information about the separation of water molecules in the hydrosphere cycle. The relationship between the isotope ratios of water in an area characterized by the local meteorological waterline, known as a reliable reference value for studies to determine the origin of groundwater recharge. soil. The research paper uses 2H and 18O isotopic data monthly monitored at 03 wells of households, 01 independent monitoring well in the Pleistocene aquifer along the Saigon River, and water data of the Saigon River. The initial research results show that the Pleistocene aquifer in Cu Chi district and the surface water of the Saigon river had an exchange at the end of the dry season - the beginning of the rainy season, from February to May 2019 respectively, and there was a direct replenishment of the surface water. from rainwater.
{"title":"Research on the exchange between groundwater of Cu Chi district, HCM City and Sai Gon river water by isotope techniques","authors":"Si Quang Nguyen, Anh Tu Tran, Thi Thuy Thai, Phuoc Dan Nguyen, Thi Minh Tam Le, Sarah Tweet","doi":"10.32508/stdjsee.v7i1.702","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i1.702","url":null,"abstract":"In the earth's water cycle, groundwater is the most difficult component to assess. Scientists have long used isotopes to find out whether groundwater is replenished, and where it comes from. Water from different locations has different isotopic characteristics and is known as a \"fingerprint\". Scientists use these fingerprints to track the movement of water along its path throughout the entire water cycle. The isotope ratios 2H/1H and 18O/16O in water provide a wealth of information about the separation of water molecules in the hydrosphere cycle. The relationship between the isotope ratios of water in an area characterized by the local meteorological waterline, known as a reliable reference value for studies to determine the origin of groundwater recharge. soil. The research paper uses 2H and 18O isotopic data monthly monitored at 03 wells of households, 01 independent monitoring well in the Pleistocene aquifer along the Saigon River, and water data of the Saigon River. The initial research results show that the Pleistocene aquifer in Cu Chi district and the surface water of the Saigon river had an exchange at the end of the dry season - the beginning of the rainy season, from February to May 2019 respectively, and there was a direct replenishment of the surface water. from rainwater.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"1199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135560467","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i1.729
Duc Anh Pham, Trinh Thi Phuong Dao, Anh Viet Hoang Nguyen, Loc Minh Tran, Bang Nguyen Khanh Ha, Hien Thi Nguyen, Huong Thi Thu Tran, Bao-Son Trinh
Plastic pollution is recently receiving significant attention. In aquatic ecosystem, plastic debris can provide a habitat for microbial communities, including pathogens which might cause ad-verse impacts on aquatic animals and human health. This study, for the first time, investigated densities of typical pathogens of Coliforms and Vibrio spp. associated on plastic samples col-lected in surface water (SW), water column (WC, 5 m below surface water), and sediment (SED) at downstreams of Sai Gon river (Phu My bridge site) and Dong Nai river (Binh Khanh habour site) in the dry season of 2022. The results showed that densities of pathogens associat-ed on SW plastics were significantly higher than densities of pathogens associated on WC and SED plastics. For instance, (i) densities of Coliform on SW plastics (9.7 ± 0.1 × 106 and 180.0 ± 10.0 × 106 CFU/g plastic) were significantly higher than the ones on WC plastics (3.1 ± 0.5 × 106 and 5.5 ± 1.2 × 106 CFU/g plastic), and the ones on SED plastics (1.7 ± 0.3 × 106 and 5.7 ± 0.7 × 106 CFU/g plastic); and similarly (ii) densities of Vibrio spp. on SW plastics (4.2 ± 0.1 × 104 and 1.3 ± 0.2 × 105 CFU/g plastic) were significantly higher than the ones on WC plastics of 0.0 ± 0.0 and 7.7 ± 0.4 × 103 CFU/g plastic, and the ones on SED plastics of 2.0 ± 0.2 × 104 and 4.4 ± 0.0 × 104 CFU/g plastic, in Phu My and Binh Khanh, respectively. Other hand, densi-ties of pathogens on plastic samples colleceted in Phu My were significally lower than in the ones collected in Binh Khanh. These findings proposed that pathogen contamination on the plastic debris in downstream area is likely heavier than in upstream area of Sai Gon and Dong Nai rivers.
{"title":"Typical pathogens on plastic debris in downstream of Sai Gon and Dong Nai rivers: an initial observation","authors":"Duc Anh Pham, Trinh Thi Phuong Dao, Anh Viet Hoang Nguyen, Loc Minh Tran, Bang Nguyen Khanh Ha, Hien Thi Nguyen, Huong Thi Thu Tran, Bao-Son Trinh","doi":"10.32508/stdjsee.v7i1.729","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i1.729","url":null,"abstract":"Plastic pollution is recently receiving significant attention. In aquatic ecosystem, plastic debris can provide a habitat for microbial communities, including pathogens which might cause ad-verse impacts on aquatic animals and human health. This study, for the first time, investigated densities of typical pathogens of Coliforms and Vibrio spp. associated on plastic samples col-lected in surface water (SW), water column (WC, 5 m below surface water), and sediment (SED) at downstreams of Sai Gon river (Phu My bridge site) and Dong Nai river (Binh Khanh habour site) in the dry season of 2022. The results showed that densities of pathogens associat-ed on SW plastics were significantly higher than densities of pathogens associated on WC and SED plastics. For instance, (i) densities of Coliform on SW plastics (9.7 ± 0.1 × 106 and 180.0 ± 10.0 × 106 CFU/g plastic) were significantly higher than the ones on WC plastics (3.1 ± 0.5 × 106 and 5.5 ± 1.2 × 106 CFU/g plastic), and the ones on SED plastics (1.7 ± 0.3 × 106 and 5.7 ± 0.7 × 106 CFU/g plastic); and similarly (ii) densities of Vibrio spp. on SW plastics (4.2 ± 0.1 × 104 and 1.3 ± 0.2 × 105 CFU/g plastic) were significantly higher than the ones on WC plastics of 0.0 ± 0.0 and 7.7 ± 0.4 × 103 CFU/g plastic, and the ones on SED plastics of 2.0 ± 0.2 × 104 and 4.4 ± 0.0 × 104 CFU/g plastic, in Phu My and Binh Khanh, respectively. Other hand, densi-ties of pathogens on plastic samples colleceted in Phu My were significally lower than in the ones collected in Binh Khanh. These findings proposed that pathogen contamination on the plastic debris in downstream area is likely heavier than in upstream area of Sai Gon and Dong Nai rivers.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135559615","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i1.730
Quoc Phu Dao, Hai Thanh Le, Anh Phuong Tran, Liem Danh Banh, Trang Thi Le
Choosing a sustainable livelihood model for residents in the buffer zones of protected areas is a central task and the key to the success or failure of protected areas. This study investigates and assesses resource and livelihood issues of people in Hon Cau Marine Protected Area, Binh Thuan province. In addition, the study also surveys, collects information and evaluates the competitiveness in the aspect of marine ecotourism of the study site and tourist attractions of the same type. The survey results show that there are two economic directions that can be developed to support the livelihoods of people in the buffer zone: tourism and aquaculture. In particular, when analyzing and evaluating the competitive advantages of local fishermen in the field of tourism and aquaculture, the results of the SWOT analysis show that aquaculture is a favorable and suitable direction for the economy, qualifications and experience of fishermen to replace inshore fishing livelihoods. The area's marine ecotourism has low competitiveness and low job-creation capacity. Therefore, the research team proposes that localities should prioritize investment in technology and financial transfer for people in the buffer zone in the field of high-tech aquaculture to transform livelihood models for affected people, directly from the protected area's fishing ban.
{"title":"Solutions for sustainable livelihood development for fishers in the buffer zone of Hon Cau Marine Protected Area, Binh Thuan province","authors":"Quoc Phu Dao, Hai Thanh Le, Anh Phuong Tran, Liem Danh Banh, Trang Thi Le","doi":"10.32508/stdjsee.v7i1.730","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i1.730","url":null,"abstract":"Choosing a sustainable livelihood model for residents in the buffer zones of protected areas is a central task and the key to the success or failure of protected areas. This study investigates and assesses resource and livelihood issues of people in Hon Cau Marine Protected Area, Binh Thuan province. In addition, the study also surveys, collects information and evaluates the competitiveness in the aspect of marine ecotourism of the study site and tourist attractions of the same type. The survey results show that there are two economic directions that can be developed to support the livelihoods of people in the buffer zone: tourism and aquaculture. In particular, when analyzing and evaluating the competitive advantages of local fishermen in the field of tourism and aquaculture, the results of the SWOT analysis show that aquaculture is a favorable and suitable direction for the economy, qualifications and experience of fishermen to replace inshore fishing livelihoods. The area's marine ecotourism has low competitiveness and low job-creation capacity. Therefore, the research team proposes that localities should prioritize investment in technology and financial transfer for people in the buffer zone in the field of high-tech aquaculture to transform livelihood models for affected people, directly from the protected area's fishing ban.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135560194","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i1.732
Tam Thi Thanh Vang, Dan Phuoc Nguyen, Thy Linh Le, Long Nguyen Thien Le, Anh Thi Ngoc Pham, Thanh Quang Do Le, Hieu Nguyen Trung Tran, Tran Thi Bich Pham
In recent years, anammox has not only economic benefits but also potential for wastewater treatment containing ammonium and low organic carbon. Along with breakthroughs ammonium treatment in the world, anammox process in internal circulation reactor (IC) is a new technology being researched and developed in high-load ammonium treatment. There In this study, an laboratory scale IC was used to enrich anammox sludge by seeding anaerobic granular sludge and feeding old leachate from the Go Cat municipal solid waste landfill. The seed sludge, which was anaerobic granular sludge taken from an UASB reactor of an industrial wastewater treatment plant was innoculated to IC at MLSS and MLVSS concentrations of 55.1 g.L-1 and 45 g.L-1, respectively, equivalent to the MLVSS:MLSS ratio of 0.82. Since 80 days of operation, the sludge in the IC was divided into two separate zones: a granular zone at the IC bottom part and the floc zone in the upper part. The average total nitrogen (TN) removal efficiency was 45% at nitrogen loading rate 0.4 – 0.6 kg N. m-3.day. The SAA of floc sludge and granular sludge on day 61, increased 6 and 8 times compared to thosed on day 27. The study illustrated that the enrichment of anammox sludge took a long time and granulation in the IC reactor was an important operating factor for anammox growth.
近年来，厌氧氨氧化不仅具有经济效益，而且在含铵低有机碳废水处理中也具有很大的潜力。随着国内外铵盐处理技术的突破，内循环厌氧氨氧化工艺是高负荷铵盐处理中正在研究和开发的一项新技术。在本研究中，利用实验室规模的IC通过播种厌氧颗粒污泥和投料从Go Cat城市生活垃圾填埋场的旧渗滤液来富集厌氧氨氧化污泥。种子污泥为工业废水处理厂UASB反应器中提取的厌氧颗粒污泥，在MLSS和MLVSS浓度为55.1 g的条件下接种于IC。L-1和45克。分别为L-1，相当于MLVSS:MLSS比值为0.82。运行80天以来，集成电路内的污泥分为两个独立的区:集成电路底部的颗粒区和上部的絮凝区。当氮负荷为0.4 ~ 0.6 kg n - m-3 d时，总氮(TN)平均去除率为45%。与第27天相比，第61天絮凝污泥和颗粒污泥的SAA分别提高了6倍和8倍。研究表明，厌氧氨氧化污泥的富集需要较长的时间，IC反应器中的造粒是厌氧氨氧化生长的重要操作因素。
{"title":"Enrichment of anammox sludge by using an Internal Circulation Reactor innoculated with anaerobic granular sludge and old landfill leachate","authors":"Tam Thi Thanh Vang, Dan Phuoc Nguyen, Thy Linh Le, Long Nguyen Thien Le, Anh Thi Ngoc Pham, Thanh Quang Do Le, Hieu Nguyen Trung Tran, Tran Thi Bich Pham","doi":"10.32508/stdjsee.v7i1.732","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i1.732","url":null,"abstract":"In recent years, anammox has not only economic benefits but also potential for wastewater treatment containing ammonium and low organic carbon. Along with breakthroughs ammonium treatment in the world, anammox process in internal circulation reactor (IC) is a new technology being researched and developed in high-load ammonium treatment. There In this study, an laboratory scale IC was used to enrich anammox sludge by seeding anaerobic granular sludge and feeding old leachate from the Go Cat municipal solid waste landfill. The seed sludge, which was anaerobic granular sludge taken from an UASB reactor of an industrial wastewater treatment plant was innoculated to IC at MLSS and MLVSS concentrations of 55.1 g.L-1 and 45 g.L-1, respectively, equivalent to the MLVSS:MLSS ratio of 0.82. Since 80 days of operation, the sludge in the IC was divided into two separate zones: a granular zone at the IC bottom part and the floc zone in the upper part. The average total nitrogen (TN) removal efficiency was 45% at nitrogen loading rate 0.4 – 0.6 kg N. m-3.day. The SAA of floc sludge and granular sludge on day 61, increased 6 and 8 times compared to thosed on day 27. The study illustrated that the enrichment of anammox sludge took a long time and granulation in the IC reactor was an important operating factor for anammox growth.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135559973","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i2.735
Thao Nguyen Nguyen, Thi Thanh Nhon Nguyen, Truong Nam Hai Ho, Hien To Thi
In recent years, microplastic pollution has emerged as a critical issue that has far-reaching impacts on the environment, organisms, and humans alike. As a result, there has been a growing need for in-depth studies aimed at analyzing and understanding the abundance, physical, and chemical characteristics of microplastics in different environments. This study, conducted in June 2021, sought to do that by examining the prevalence of microplastics in surface water samples from the Saigon River and Can Gio Sea, and comparing their distribution from the river to the sea. The study involved the collection of thirty surface water samples from both the Saigon River and Can Gio Sea, which were subsequently analyzed through the extraction of microplastics from the water samples and identification using infrared spectroscopy. The results of the study showed that microplastics were present in all surface water samples, with an average abundance of 0.80 ± 0.58 pieces/m3 in the Saigon River and 0.24 ± 0.45 pieces/m3 in the Can Gio Sea. These findings highlight the severity of the problem, which affects both freshwater and marine ecosystems. It is noteworthy that microplastics with sizes larger than 1 mm and fragment shape were found to dominate in both sampling areas. Additionally, the study revealed that many colors were found, with white and transparent colors accounting for over 50% of the total microplastic abundance. Comparing the results of this study with the 2020 study conducted by the same research group, it was evident that lightweight plastics such as polyethylene, polypropylene, and ethylene-vinyl acetate continued to play an important role in microplastic pollution in this area. In light of these findings, it is clear that plastic pollution is a pressing issue that demands immediate attention and action. The impact of microplastics on the environment, organisms, and human health is undeniable, and as such, there is an urgent need to develop strategies aimed at reducing their impact.
{"title":"Distribution of microplastics in surface water from Saigon River to Can Gio Sea","authors":"Thao Nguyen Nguyen, Thi Thanh Nhon Nguyen, Truong Nam Hai Ho, Hien To Thi","doi":"10.32508/stdjsee.v7i2.735","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i2.735","url":null,"abstract":"In recent years, microplastic pollution has emerged as a critical issue that has far-reaching impacts on the environment, organisms, and humans alike. As a result, there has been a growing need for in-depth studies aimed at analyzing and understanding the abundance, physical, and chemical characteristics of microplastics in different environments. This study, conducted in June 2021, sought to do that by examining the prevalence of microplastics in surface water samples from the Saigon River and Can Gio Sea, and comparing their distribution from the river to the sea. The study involved the collection of thirty surface water samples from both the Saigon River and Can Gio Sea, which were subsequently analyzed through the extraction of microplastics from the water samples and identification using infrared spectroscopy. The results of the study showed that microplastics were present in all surface water samples, with an average abundance of 0.80 ± 0.58 pieces/m3 in the Saigon River and 0.24 ± 0.45 pieces/m3 in the Can Gio Sea. These findings highlight the severity of the problem, which affects both freshwater and marine ecosystems. It is noteworthy that microplastics with sizes larger than 1 mm and fragment shape were found to dominate in both sampling areas. Additionally, the study revealed that many colors were found, with white and transparent colors accounting for over 50% of the total microplastic abundance. Comparing the results of this study with the 2020 study conducted by the same research group, it was evident that lightweight plastics such as polyethylene, polypropylene, and ethylene-vinyl acetate continued to play an important role in microplastic pollution in this area. In light of these findings, it is clear that plastic pollution is a pressing issue that demands immediate attention and action. The impact of microplastics on the environment, organisms, and human health is undeniable, and as such, there is an urgent need to develop strategies aimed at reducing their impact.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135507030","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i2.736
Thi Dieu Hien Vo, Van Truc Nguyen, Thi Hoa Nguyen
This study evaluated the antibiotic removal efficiency of doxycycline (DOX) of biochar prepared from banana peels with different temperatures. Factors affecting antibiotic adsorption (including pH, initial DOX concentration, contact time, biochar dose) were studied. The results show that biochar generated at high temperature (800 oC) and modified by KOH (BP-KOH), has higher antibiotic adsorption capacity than those at low temperature (no pyrolysis and 500 oC pyrolysis, BP and BP500 respectively). The properties of the materials were determined by the scanning electron microscope (SEM), Fourier Transform Infrared Spectroscopy (FITR), zeta potential, and Brunauer–Emmett–Teller (BET) analysis methods. The SEM image shows that the fabricated material contains many pores. FTIR spectra show that the fabricated material contains surface functional groups such as O - H, C - H, C - C, etc. The BET results show that high surface area of BP-KOH (710.214 m2/g). The DOX adsorption capacity (120 mg/L) of BP-KOH obtained a high treatment efficiency of 97.9% with an adsorption time of 1440 minutes (24 h) with an optimal pH of 6. Research results showed found that adsorbent made from banana peel has great potential in the application of antibiotic treatment in water.
{"title":"Removal of doxycycline antibiotics in water with adsorbents derived from banana peels","authors":"Thi Dieu Hien Vo, Van Truc Nguyen, Thi Hoa Nguyen","doi":"10.32508/stdjsee.v7i2.736","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i2.736","url":null,"abstract":"This study evaluated the antibiotic removal efficiency of doxycycline (DOX) of biochar prepared from banana peels with different temperatures. Factors affecting antibiotic adsorption (including pH, initial DOX concentration, contact time, biochar dose) were studied. The results show that biochar generated at high temperature (800 oC) and modified by KOH (BP-KOH), has higher antibiotic adsorption capacity than those at low temperature (no pyrolysis and 500 oC pyrolysis, BP and BP500 respectively). The properties of the materials were determined by the scanning electron microscope (SEM), Fourier Transform Infrared Spectroscopy (FITR), zeta potential, and Brunauer–Emmett–Teller (BET) analysis methods. The SEM image shows that the fabricated material contains many pores. FTIR spectra show that the fabricated material contains surface functional groups such as O - H, C - H, C - C, etc. The BET results show that high surface area of BP-KOH (710.214 m2/g). The DOX adsorption capacity (120 mg/L) of BP-KOH obtained a high treatment efficiency of 97.9% with an adsorption time of 1440 minutes (24 h) with an optimal pH of 6. Research results showed found that adsorbent made from banana peel has great potential in the application of antibiotic treatment in water.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135504840","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 : 2023-01-01DOI: 10.32508/stdjsee.v7i1.723
Hien Trong Dieu Le, Luan Hong Pham, Toan Dinh Quang, Tu Duong Nguyen
Surface water frequently contains pesticide residues, which could be a hazard to freshwater ecosystems and biodiversity. Pesticides can enter waters through a number of different pathways, but oncentrations is runoff from irrigation or precipitation. This study presents an investigation of banned pesticides used across the range of land use in catchments of the Ma river and its tributaries in Thanh Hoa province, Vietnam in period of time 2011-2015. Applying principal component analysis (PCA), we investigated the relationship between specific pesticides and land use. Besides, the method of aggregating monitoring locations known as cluster analysis (CA) has also been applied in this study. All ten banned pesticides including eight insecticides (aldrin/dierin, BHC, chlordane, endrin, heptachlor, lindan, malathion, and parathion) and two herbicides (2,4D and paraquat) studied still occur in surface water due to their persistence and remobilization during floods, runoff and not presumably influenced by the fraction of land uses area in the catchments. Clustering results revealed banned pesticides still occurs in some areas.
{"title":"Land use influencing the pesticides concentration in Ma river and its tributaries in Thanh Hoa province","authors":"Hien Trong Dieu Le, Luan Hong Pham, Toan Dinh Quang, Tu Duong Nguyen","doi":"10.32508/stdjsee.v7i1.723","DOIUrl":"https://doi.org/10.32508/stdjsee.v7i1.723","url":null,"abstract":"Surface water frequently contains pesticide residues, which could be a hazard to freshwater ecosystems and biodiversity. Pesticides can enter waters through a number of different pathways, but oncentrations is runoff from irrigation or precipitation. This study presents an investigation of banned pesticides used across the range of land use in catchments of the Ma river and its tributaries in Thanh Hoa province, Vietnam in period of time 2011-2015. Applying principal component analysis (PCA), we investigated the relationship between specific pesticides and land use. Besides, the method of aggregating monitoring locations known as cluster analysis (CA) has also been applied in this study. All ten banned pesticides including eight insecticides (aldrin/dierin, BHC, chlordane, endrin, heptachlor, lindan, malathion, and parathion) and two herbicides (2,4D and paraquat) studied still occur in surface water due to their persistence and remobilization during floods, runoff and not presumably influenced by the fraction of land uses area in the catchments. Clustering results revealed banned pesticides still occurs in some areas.","PeriodicalId":489490,"journal":{"name":"Tạp chí Khoa học và Công nghệ: Chuyên san Khoa học Trái đất và Môi trường","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135604620","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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