ABSTRACT This study investigated the effects of NaOH direct leaching for sulfur removal from a kaolin ore from the Balıkesir region, Turkey. Characterization studies were undertaken before sulfur removal studies to enlighten the structure and originate the source of sulfur. The characterization studies revealed that the ore was mainly composed of quartz, with sulfur originating from alunite minerals with opal inclusions. The leaching process was tested under varying NaOH concentrations (1.5–2 M), temperatures (95 ± 2°C), and durations (2 h) in temperature‐controlled closed systems to maintain consistency. Results demonstrated complete (100%) sulfur removal from alunite under optimal conditions. However, significant mass losses (18.15%–45%) occurred because of the dissolution of kaolinite along with alunite, indicating the method's effectiveness in sulfur removal but also its potential drawbacks for kaolinite retention.

Ilker Erkan

Ibrahim Alp

Asia-Pacific Journal of Chemical Engineering

亚太化学工程杂志旨在捕捉化学工程相关和专业领域的当前发展和举措。该杂志每年出版六期，展示创新技术发展，为技术转让和合作提供机会。亚太化学工程杂志将特别关注以下关键领域：工艺应用（分离、聚合物、催化、纳米技术、电化学、核技术）；能源与环境技术（储能与转化材料、煤气化、气体液化、大气污染控制、水处理、废物利用与管理、核废料修复）；和生化工程（包括靶向给药应用）。

The Asia-Pacific Journal of Chemical Engineering aims to capture the latest developments and initiatives in the field of chemical engineering and related disciplines. The journal publishes six issues annually, showcasing advancements in innovative technologies and providing opportunities for technology transfer and collaboration. The Asia-Pacific Journal of Chemical Engineering particularly focuses on key areas such as process applications (including separation, polymers, catalysis, nanotechnology, electrochemistry, and nuclear technology); energy and environmental technologies (covering energy storage and conversion materials, gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, and nuclear waste remediation); and biochemical engineering (including targeted drug delivery applications).

《Asia-Pacific Journal of Chemical Engineering》旨在捕捉化学工程及相关专业领域的最新发展和动态。该杂志每年出版六期，展示创新技术的进展，并为技术转让与合作提供机会。《Asia-Pacific Journal of Chemical Engineering》特别关注以下关键领域：工艺应用（如分离、聚合物、催化、纳米技术、电化学、核技术）；能源与环境技术（包括储能与转化材料、煤气化、气体液化、大气污染控制、水处理、废物利用与管理、核废料修复）；以及生化工程（包括靶向给药应用）。

Category	Quartile
工程技术	4
工程技术, 工程化工	4

Sulfur Removal From Low‐Grade Turkish Kaolin Clay

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Journal Info

Category	Quartile
ENGINEERING, CHEMICAL	3