http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
바이오차의 원료, 온도, 스팀 활성화가 바이오차 성질과 납 흡착능에 미치는 영향
곽진협,( Md Shahinoor Islam ),( Siyuan Wang ),( Selamawit Ashagre Messele ),( M. Anne Naeth ),( Mohamed Gamal El-din ),( Scott X. Chang ) 한국농공학회 2019 한국농공학회 학술대회초록집 Vol.2019 No.-
바이오차(biochar)는 폐수 내 중금속 및 유기 오염물질을 제거할 수 있는 물질로 각광을 받고 있다. 하지만 바이오차 생성 조건에 따른 성질 변화와 그에 따른 폐수 내 중금속 제거능에 대한 연구는 미비하였다. 본 연구는 바이오차의 원료, 열분해 온도, 그리고 스팀 활성화가 바이오차의 물리적, 화학적 성질과 납 흡착능에 미치는 영향을 알아보기 위해 수행하였다. 톱밥, 카놀라 짚, 밀짚, 그리고 축산 분뇨 펠렛을 이용하여 300, 500, 700 ℃에서 스팀 활성화가 있거나 없는 조건에서 바이오차를 제조하였다. 열분해 온도가 증가함에 따라 바이오차 pH, 표면적, 그리고 탄소 함량이 증가하였으며, 산소 및 수소 함량 그리고 작용기가 감소하였다. 스팀 활성화는 바이오차의 표면적은 증가시켰지만 다른 성질에는 영향을 미치지 않았다. 스팀 활성화를 시키지 않은 바이오차 중 카놀라와 밀짚을 700 ℃에서 생성하였을 때 납 흡착능이 최대였다. 또한 열분해 온도가 증가함에 따라 납 흡착능이 증가하였는데, 이는 바이오차 pH, 에쉬함량 및 표면적이 증가하면서 침전, 이온 교환, 내권복합화가 증가하였기 때문으로 판단된다. 스팀 활성화에 의해 납 흡착능이 증가하였는데, 이는 바이오차의 표면적이 증가하였기 때문이다. 납 흡착은 2차 동역학 모델을 따랐다. 연구 결과 폐수 정화를 위해 지역 농업과 임업에서 발생하는 부산물을 이용하여 바이오차를 제조할 수 있으며 생성 조건에 따라 최적의 바이오차를 생성할 수 있을 것으로 판단된다.
Microplastics pollution in different aquatic environments and biota: A review of recent studies
Rezania, Shahabaldin,Park, Junboum,Md Din, Mohd Fadhil,Mat Taib, Shazwin,Talaiekhozani, Amirreza,Kumar Yadav, Krishna,Kamyab, Hesam Elsevier 2018 MARINE POLLUTION BULLETIN Vol.133 No.-
<P><B>Abstract</B></P> <P>Microplastics (MPs) are generated from plastic and have negative impact to our environment due to high level of fragmentation. They can be originated from various sources in different forms such as fragment, fiber, foam and so on. For detection of MPs, many techniques have been developed with different functions such as microscopic observation, density separation, Raman and FTIR analysis. Besides, due to ingestion of MPs by wide range of marine species, research on the effect of this pollution on biota as well as human is vital. Therefore, we comprehensively reviewed the occurrence and distribution of MPs pollution in both marine and freshwater environments, including rivers, lakes and wastewater treatment plants (WWTPs). For future studies, we propose the development of new techniques for sampling MPs in aquatic environments and biota and recommend more research regarding MPs release by WWTPs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> MPs pollution in different aqueous environments and biota is reviewed. </LI> <LI> MPs pollution in marine and fresh waters were studied more than WWTPs. </LI> <LI> Wide range of marine biota ingested different types of MPs. </LI> <LI> Future studies should focused on treatment as detection is well developed. </LI> </UL> </P>
Optimization of aluminium recovery from water treatment sludge using Response Surface Methodology
Ooi, Theam Yiew,Yong, Ee Ling,Din, Mohd Fadhil Md,Rezania, Shahabaldin,Aminudin, Eeydzah,Chelliapan, Shreeshivadasan,Abdul Rahman, Azlan,Park, Junboum Elsevier 2018 Journal of Environmental Management Vol.228 No.-
<P>For decades, water treatment plants in Malaysia have widely employed aluminium-based coagulant for the removal of colloidal particles in surface water. This generates huge amount of by-product, known as sludge that is either reused for land applications or disposed to landfills. As sludge contains high concentration of aluminium, both can pose severe environmental issues. Therefore, this study explored the potential to recover aluminium from water treatment sludge using acid leaching process. The evaluation of aluminium recovery efficiency was conducted in two phases. The first phase used the one factor at a time (OFAT) approach to study the effects of acid concentration, solid to liquid ratio, temperature and heating time. Meanwhile, second phase emphasized on the optimization of aluminium recovery using Response Surface Methodology (RSM). OFAT results indicated that aluminium recovery increased with the rising temperature and heating time. Acid concentration and solid to liquid ratio, however, showed an initial increment followed by reduction of recovery with increasing concentration and ratio. Due to the solidification of sludge when acid concentration exceeded 4 M, this variable was fixed in the optimization study. RSM predicted that aluminium recovery can achieve 70.3% at optimal values of 4 M, 20.9%, 90 degrees C and 4.4 h of acid concentration, solid to liquid ratio, temperature and heating time, respectively. Experimental validation demonstrated a recovery of 68.8 +/- 0.3%. The small discrepancy of 2.2 +/- 0.4% between predicted and validated recovery suggests that RSM was a suitable tool in optimizing aluminium recovery conditions for water treatment sludge.</P>
Environmentally sustainable applications of agro-based spent mushroom substrate (SMS): an overview
Mohd Hanafi, Fatimah Hafifah,Rezania, Shahabaldin,Mat Taib, Shazwin,Md Din, Mohd Fadhil,Yamauchi, Masahito,Sakamoto, Mariko,Hara, Hirofumi,Park, Junboum,Ebrahimi, Shirin Shafiei Springer-Verlag 2018 Journal of material cycles and waste management Vol.20 No.3
Madihah Halim,Ameyra Aman-Zuki,Syarifah Zulaikha Syed Ahmad,Abdullah Muhaimin Mohammad Din,Atikah Abdul Rahim,Mohamed Mazmira Mohd Masri,Badrul Munir Md. Zain,Salmah Yaakop 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.4
Parasitoid wasps (Hymenoptera) play a significant role in reducing the pest population of the bagworm species Metisa plana. This study presents the abundance and DNA barcoding information of eight parasitoid wasps species, Dolichogenidea metesae (47%), Brachymeria carinata (19%), Buysmania oxymora (12%), Goryphus bunoh (7%), Pediobius anomalus (5%), Eupelmus cotoxanthae (2%), Apanteles aluella (5%), Apanteles sp.1 (3%) and that emerged from M. plana collected from three highly infested oil palm plantations in Selangor (west), Perak (north) and Johor (south) in Peninsular Malaysia. Samples of infested M. plana were collected from the field and reared in a rearing room. The parasitoid wasp species D. metesae recorded the highest emergence numbers and the broadest presence in all the sampling sites. The relationships among the parasitoids species were estimated and visualized using Neighbor Joining (NJ) phylogenetic analyses with the Ceraphronidae family as an outgroup. The resulting NJ tree showed that the identified parasitoid wasps were successfully classified into specific species and supported with bootstraps values between 55% to 100%. This study provides important information on potential biological control agents for M. plana that may be useful for the Malaysian oil palm industry.